Norton Type CTU Cylindrical Grinder - Manual Grinder, Cylindrical

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NORTON

6

”

& 10

” TYPE CTU MACHINE

INSTRUCTION & PARTS FiANUAL

. *

This manual is intended to aid all those concerned

in knowing the proper method of installing, operating, and
maintaining these machines. Close observance of the suggestions
it contains is strongly recommended.

For parts inquiries or orders, please give the code
numbers as provided on the drawings, and give the serial number
of the machine concerned. This is important. Our records are
set up to provide the proper part for either the 6-

; or the 10'

Type CTU Machine - but the serial number must be given.

The descriptions, illustrations, and the specifications
in this manual were correct at the time of printing. However,

*

sihce the policy of NORTON COMPANY is constantly to improve its

machines, those built at later dates may differ

from these details.

NORTON COMPANY

Chicago
Cleveland, Ohio
Detroit, Michigan

, Illinois

Hartford, Connecticut
New York, New York

ENGLAND

Dealers in all principal cities

. *«,

, WORCESTER 6, MASS., U.S.A.

Cable address: ;

BRANCH OFFICES

4737 So. Christiana Ave.

1306 East 55th Street
5505 Lincoln Avenue
992 Farmington Avenue

6l Broadway

Welwyn Garden City

*IT0RC0'

,?

Herts

iL

SECTION I - ERECTING

1

INDEX

Page

Erecting Drawings - - -
Packing List

------
Lifting Machine - - - -
Setting Up Machine - -
Mounting the Wheel - -
Wheel Balancing - - - -
Headstock and Footstock
Electrical Connections
Grinding Coolant - - -
Wheel Sheave Selection
Operation Experimenting

SECTION II - UNIT CONSTRUCTIONS

Tables and Swivel Adjustment ---------

Headstocks ------------------
Footstocks ------------------
Wheel Slide Unit

---------------
Wheel Spindle Bearings Adjustment -------
Wheel Spindle Reciprocation & Shoulder Grinding

Attachment ------------------
Pump Unit -------------------
Work Stop-Start Unit

-------------

Wheel Feed Screw ---------------
Wheel Feed Mechanism -------------

Power Wheel Head Traverse -----------
Grinding Feed -----------------
Automatic Feed at Table Reversals -------

8
8
8
8

9
9
9

9

10
10
10

11

11
11
11
14

14
16

16
16

18
18
18
20
20

SECTION III - LUBRICATION CHART

Oil Dilution

SECTION IV - OPERATING ARRANGEMENTS

Type CTU Plain Machines ----------------
Type CTU Semiautomatic Machines ------------

SECTION V - GRINDING PROCEDURE AND GENERAL INFORMATION - -

u

Grinding Factors
Truing Principles
Truing Devices
Rough Truing - -
Finish Truing - -
Truing Summary

21

21
22

. 22

25

28
28

28
28

28
29

29

INDEX (continued)

2

I'age

Truing Precautions ----------
Wheel Selection
ALUNDUM - --

-

--

--

--

--

--

--

-

32 ALUNDUM and 38 ALUNDUM ------

57 ALUITDIJM - -

CRYSTOLON -------

Factors Affecting Selection
Work Support -------

Setting-up Routine -----

Index Setting -------
Wheel Wear
Wheel Balance -------

Care of Centers ------
Way Lubrication - --

Grinding Compounds -___

Soda Compounds ______

Cleaning Coolant Tank --_
Wheel Speed --------

Spindle Sheaves ------

______

-

--

- - - - -

_____

____

_____

-- -

_____

_____

_____

--

-

____..
_____
_____
_____
_____
_____

Adjustable Speed Wheel Drive Motor - -
Work Speeds --------

Traverse Speeds ------

Vibration

________

Information ---------

_____

_____
_____

____

29
29

30
30

30

30'

30
31

31

32
32
32
32
32
32

33

33
33

33
33
34
34
34
35

ILLUSTRATIONS

Subject

Front View - NORTON 6" Type CTU Semiautomatic
Front View - NORTON 10"

Type CTU Semiautomatic
Left Rear View - NORTON Type CTU Machines ...

Plan View - Wheel Spindle Assembly .....

'Wheel Slide & Parts .

............................

.

Number

___ N5662-C

----- N5751-C

.... N6026-A

. . IT0O24-A
. ..

. 758-A

Spindle Reciprocating f; Shoulder Gr. Attachment ... SE67O-A

Complete 'Wheel Feed Unit ....................

Right Front Apron Details ............

Headstock - A.C. Drive ...........................

Headstock - D.C. Drive .
Foot stock
Wheel Guard & Farts .

Cross Feed Cylinder ... .

Wheel Feed Apron .................................

Feed Screw and Parts .

......................

, . . .

...............

..................................

..........................

.

..................

..

.

Table Control Valve and Table Cylinder

Combination Valve ........................”.

.........

........ SS674-A

...,. N6025-A

. . . .. SE660-A

........ SE672-A

■ . . .- SE676-A

. .... SE666-A

.....

SE760-A

........ SE762-A

.....

SE730-A

........ SE678-A

........ SI’6 84

-A

Push Button Apron and Cycle Control Mechanism ........ SE6C2-A

rage

3
5

7

12
13

15
17
19

36
37

38
39

40
41

42
43

44
45

:«

%

mm

Jill"'

/

/

■m

Norton 6” x 18” Type CTU Semiautomatic Cylindrical Grinder

INDEX - 6

’ TYPE CTU MACHINE CONTROLS, etc.

1.. Table traverse hand wheel

2. Motor push buttons
Electric timer

3.

(Semiautomatic machines)

Table reverse lever

4.

Truing and grinding speed

5-

controls

6.

Table dwell controls

7.

Selector for semiautomatic
or plain operation
(semiautomatic machines)

8.

Table stop-start lever

9. Wheel feed clutch lever

10.

Wheel feed index
One complete turn of index
knob equals .004" of work
diameter reduction *

11.

Wheel feed hand wheel
One complete turn equals .200

’

of work diameter reduction

12.

Control for amount of automatic

wheel feed at table reversals.

Amount of feed - 0 - .003"

13.

Control for rate of automatic
Infeed (Semiautomatic machines)

14.

15.

Wheel feed control lever

Pull to advance wheel slide -

Push to retract

(semiautomatic machines)

Spindle lubricant sight glass

- one for each bearing
Stream must be continuous when
wheel is running.

16.

17.

Wheel spindle reciprocation

control

lever

(When supplied)

Electric grinding gage

(Supplied as extra on Semi



automatic machines)

* See item 12. - 10" Type CTU Machine Index

for further information as to the functioning
of this "Click-Count" Index Mechanism

4=-

a

sk

IHII

Norton 10

” x 36

” Type CTU Semiautomatic Cylindrical Grinder

INDEX

10" TYPE CTU MACHINE CONTROLS

, etc.

Turn counterclockwise to open

1.
belt guard cover

2. Headstock clamping nuts
Headstock rack pinion

3.

4. Work rotation control lever
Motor push buttons

5.

6. Table traverse hand wheel
Table reverse lever

7.

8.

Truing and grinding speed
controls

Table Dwell Controls

9.

10. Table stop-start lever

11. Wheel feed clutch lever

12.

Click-Count" Wheel Feed Index

.Each click on clockwise rotation

represents amount of feed to
obtain .0001 " work diameter
reduction

13.

14.

Steel ribbon base way guards

Table swivel adjustment.
Turn clockwise to move right end
of table toward grinding wheel

15.

16.

Footstock rack pinion
Footstock lever.

Pull way back to lock spindle
in withdrawn position

17.

18.

19.

Footstock clamping nuts

Footstock spindle binder
Filter for spindle lubricant

Turn handle daily

20.

Coolant control lever
For manual operation of coolant

flow, when this is desired

21.

Electrical control enclosing

case

]

Spindle Oil Drain.

y

hyd.Oil Pressure Adj.

r^Hyd.Oll Pressure (xczsf®

Hyd. Oil Level

Ways Lub. Filter

Ways Lub.Pressure Adj.

Ways Lub, Pressure Ga^e

>-Ways Lub. Oil Level

Fill Hydraulic

Fill Lubricatin<d, Reservoir

Reservoir

Ways Lub. Adj Valves

SECTION I

ERECTING

ERECTING DRAWINGS

Complete erecting drawings are supplied for the

instruction of the millwright in setting up the machine.

Caution should be taken to provide ample clearance both at

the rear for servicing and at the ends for movement of the
sliding table. These drawings indicate the location of
various units as well as the floor space required for opera
tion.

PACKING LIST

8



All crates and containers should be removed with

care and the entire shipment checked against the packing list

which is sent with the machine. Those items marked"X"

indicate future shipment.

LIFTING MACHINE

The three point method of lifting should be used,
slings being placed around short bars at the ends and a long
bar at the rear thrust into large cast holes in the base.

Hemp rope, wire rope, or steel chains may be used
with rope being given the preference,
knots do not tend to lift

the table or other easily damaged

Be sure that kinks or
portions of the machine while lifting.
SETTING UP MACHINE

Machines up to and including 48" of work length
capacity rest on three pads cast into the base - one at each
end beneath the table and one at the rear.
steel shims and an accurate spirit

level, shim the pads as

necessary in order to level the machine perfectly in both

With the use of

directions usipg the table top or ways as- planes.

However, if the machine is designed to grind work
lopger than 48,!, adjustable foundation jack screws and a
leveling carriage are supplied with the maohipe. These screws

will require a-much more sensitive spirit
machine level should be recheckec after use to determine if

level and the

it continues to be maintained.

PLACE THE MACHINE ON AS SOLID A FOUNDATION

AS POSSIBLE DO NOT GROUT IN BASE,

LUBRICANTS RECOMMENDED FOR USE IN NORTON MACHINES—BASED
UPON SAYBOLT UNIVERSAL VISCOSITY RATING IN SECONDS AT !O0°F

Grinding Machines

1 4" Type C Hydraulic

2 6" Type C—Hand Traverse. . .

3.

4 10" Type LC—Hand Traverse

5

6 6" Type C—Angular
7 , ifiHXype-C. J*IL

8 10" Type L.C.T.U

9 10" Type C—Hand Traverse.
10
11
12 10" Type C—(Hand Traverse)
13
14
15

10" Type C.T.U

16

14" Type L.C.T.U
14" and 16" Type C—Hand Traverse

17

Hydraulic

45° Angular.
30°-45° Angular

18
19

20

20" and Larger—Type D

21

36" Type D—Roll Grinder

22
23

Cam-O-Matic

24

#2 Cam-O-Matic

25

Crank-O-Matic

26

6" Surface—Plain Bearing

27
2S

8" Surface

29

10" Surface

30

12" Surface

31

Bura-way

32

#1 Tool and Gutter—Plain Bearing

1

33
34
35

#2 Tool and Cutter—Plain Bearing

36

...................

Antifriction.

........................................

.......................................

.......................................

.........................................

37
38

#2 Cutter and Tool—Antifriction.

39
40

#20 Cutter and Tool—Antifriction

41
42

Multipurpose—12", 14" and 16"..

43

44

10 x 20" Universal

45

Autopart—Hydraulic

46

22 x 72" Type C Mechanical.
23" and 26" Type C Hi-Swing

47
48

Heavy Duty

49

16"/40" Type C—Piston Rod.

44" Car W’heel

50
51

10" Twin-O-Matic

52

Full Automatic

Hi-Swing

................

.............

Hydraulic........

.................

...................

Hydraulic
Mechanical

(Traveling Wheel)

.................

.........

.......

. ..

..................................

...............................

Hydraulic
Mechanical.

...........

........

..............

.

Antifriction.
Internal

Antifriction.
Internal

Internal

Internal Spindle. ..

...........

..............

.........................

...................

.........................

Internal.

............

........

........

........

.

.

....

..

.

.
.
.

. ..

Wheol

Spindle

A
A
A
A
A
A
A
A
A
A
A

A
A
A

A
A
A
A

A
A

A
A
A
A

*

A B
A B
A B

*

A

*

A
A B

*
*
*
*
*
*

A

*
*

A
A
A
A
A
A
A B

A

Hydraulic

Systom

B

None

B

None

B
B

___B

B

None

B

None
None

B
B

B

None

B
None
None
None

B

B

B 25

B

B

None
None
None
None

B

B
None
None
None
None

B

B

-R-c

B
None
None
None
None
None

__

Headstock

None

D
D
D
D D

-XL D

Vee Belts

'"Vee'BEltS"

D
D D
D D

D
D

Vee

Belts

Vee Belts

Vee Belts
Vee Belts
Vee Belts

Vee Belts

Vee Belts

D
D
D

-D-
None
None

None

None

None
None
None
None
None
None
None
None
None
None
None

D
D

None

D
D D
D
D
D
D
D

B

D D

Feed Screw

B
D
D
D

-Dl

D

D

D

D
D
D

D
D

D
D

B
B B

B B
D
D D
D D
D D
D

D

D D

D
D
D

D

D
D
D
D

D
D

D

D

D
D

JT

All Ways

J

F
F
F
F
F
J
J
F
F
F

F

T

F
J

J
Ft
Ft
Ft

Ft

Ft

F

F
B

D

D
D

D
D
D
D
D
D
F
F

F
F
F
Ft
Ft

F
F
F

Gear

Boxes

None

D

None

D

None

-D-

None
None

D

None

D
D

D
None
None

E
None

E

G

F
None

None

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

None
None
None

None
None

D
E
E
E

G
None
None

1
2
3

4
5

6
7

'8

‘

-
9

10

11
12
13
14
15

16
17
18

:

19

20

21

22
23

24

26
27

28
29
30

31
32
33
34
35
36
37
38
39
40
41
42
43
44
45

46
47
4S
49
50
51

i

52

>•

Lapping Machines

#10 Universal.

53

#16 FC Vertical

54

#2 Vertical

55

Seal-O-Lap

56

#26 Flyprolap**

57

#30 Cam-O-Lap

58

#30 Crank-O-Lap

59

#40 Crank-O-Lap

60

Simplex—Hand

61

Simplex—Hydraulic. .

62

Simplex—Pneumatic

63

A—Spindle
B—Hydraulic oil with 150
C—Hydraulic oil with 300 S.U.V. at 100°F.
D—Lubricating oil with 300 S.U.V. at 100°F.

*Follow maker’s instructions on all ball bearing spindles, motors, and special work heads.
tDue to added table weight and possible increased work loads, it is sometimes advisable to use

length increases.

**Use Ball Bearing Grease for Worm Shafts of these machines.

.

■M *

..........

..........

.......

.......

..........

..

oil

with 50 to 60 S.U.V. at 100°F.

S.U.V.

at

100°F.

Lower Drive

Aprons

H -f-

Ball

H + Ball Brg. Grease
H -f-

Ball

H -j- Ball Brg. Grease
H 4- Ball Brg. Grease

None
None
None
None
None
None

Brg. Grease
Brg. Grease

E—Lubricating oil
F—Lubricating oil with 1000 S.U.V. at 100°F.

G—Lubricating oil with 1700 S.U.V. at 100°F.
FI—Lubricating oil with 2000 S.U.V. at 100°F.
J —

[3]

Hydraulic

System

■,

None
None
None
None

Special ways lubricant (with additives).

B

B
B
B

None

B

Air Plus A

with 600 S.U.V. at 100°F.

Headstock

None
None
None
None
None

F
F
D
FI
FI
D

oil

Upper Spindle

None
None

None
Ball Bearing Grease
Ball Bearing Grease

None

None

None
None
None
None

of

heavier viscosity as table

53
54
55
56

57
58
59

60

61

62
63

/

LUBRICANTS

Norton Company publishes this chart as

by Norton Company. These oils are guaranteed by the producers and Norton Company assumes no obligations, either expressed or implied, for quality or performance of these lubricants.

FOR NORTON

an

aid in selecting proper

NOTE—The viscosities indicated in the column .headings are based upon S.U.V. @ 100° F.

GRINDING

lubricants for its

AND LAPPING

machines. Specific oils are selected by their respective manufacturers as meeting major phjteieal characteristics laid down

MACHINES BY BRAND NAMES

The alphabetical letters over
columns are those given
on Page 3

Oil Company

Atlantic

Alemite Corporation

Cities Servicef

C. H. Clark Oil Co.

Continental

Esso Marketers*
Fiske Bros.
Gulf

Ploughton
Kendall Refining Co.

Keystone

New

York and New Jersey

Lubricant Co.
Pennzoil
Pure Oil

Shell
Sinclair

Socony-Vacuum

Standard of Indiana

D. A. Stuart Oil Co.

Sun Oil

' kwan-Finch Oil Corp.

Tfexas Company

Tidewater
White & Bagley

A

50-60 Spindle

HFS Spindle Oil

Alemite High Speed

Oil “A”

Pacemaker #00

Sea Gull No. 20 Spindle

B

150 Hydraulic

Ideal Oil C
Alemite Industrial Oil #1

North Star jf2
Pacemaker jf 1

H.S.M. No. 4

300 Hydraulic

Ideal Oil F

Alemite Industrial Oil

Pacemaker 300-T
Penn-Pacemaker 3-R

H.S.M. No. 7

c

D

300 Lubrication

Atreco Oil F
Matchless Oil F

#2

Alemite Industrial Oil #2

Sentry if 7

H.S.M. No. 7

600 Lubrication

Atreco Oil J
Matchless Oil J

Alemite Industrial Oil #3
Sentry #10

Parlube 60

E

1000 Lubrication

Eureka Oil M

Alemite Industrial Oil #4

Sentry #11

Parlube 100

F

Oil

Conoco

Spinesso 34
Lubriplate #0
Gem Oil A

Perfection Oil A

Kensington #7
70 @ 100 Neutral
Spindle Oil #4
#1194 N.F.O. Spindle Oil

H. S. Spindle Oil
Spindle Oil B
Tellus Oil 15
Cadet Oil D

Gg. Yelocite E

Superla Spindle Oil A

Dasco #730
Solnus XXX Light
Safco Spintul CC

Almag Oil

Tycol Audubon 18

! Economy #45 Oil

G.P. Spindle

Oil Light

Redind Ex.-Light

Esstic 42
Lubriplate #1

Harmony Oil A-WCR

Hydro-Drive
450 Machine Oil
KLC Oil #6
Non-Fluid Oil

“

A-#89-N”
Pennbell Light
Puritan Light
Tellus Oil 27
Rubilene Extra Light

Palite
Gg. D.T.E. Oil Light
Stanoil #15

Jewell #15
Solnus Light
Dytac A
Regal Oil A

Regal A (R&O)
Tycol Aturbrio 51
Economy #150 Oil

MIH-Light

Grade

Redind Medium

Esstic 50
Lubriplate #2
Harmony Oil C-WCR

Hydro-Drive M1H-20

41-AA Oil

KLC Oil #5
Non-Fluid Oil

“
Pennbell Hvy. Med.
Puritan Hvy. Med.
Tellus Oil 33
Rubilene Lt. Med.

Gg. D.T.E. Oil Hvy. Med.

Stanoil #31

Jewell #3
Solnus Medium
Dytac C
Regal Oil C

Regal C (R&O)
Tycol Aturbrio 61
Economy #300 Oil

A-#90-N”

Grade

Redind Medium

Faxam 50
Lubriplate #3
Legion D

Hydro-Drive M1H-20
Reliable 20 Oil
Cond. Oil #50X Light
Non-Fluid Oil “

Grade
Utila #3
Puroco Hvy. Med.
Carnea Oil 33
Rubilene Light Medium

Vactra Hvy. Med.
Stanolex #31

Indoil #31

Dasco #3
Solnus Medium
Ambient C

Aleph Oil

Tycol Aredden 60

Economy #300 Oil

A-#90-N”

Redind Heavy

Esstic 65
Lubriplate #3
Parvis H

Hydro-Drive M1H-30

Reliable 40 Oil
Cond. Oil #50 Med.
Non-Fluid Oil “

Utila #4
Puroco Heavy
Carnea Oil 41
Rubilene Med. Hvy.

Vactra Extra Hvy.
Stanolex #51

Indoil #51 '

Dasco #6
Solnus Hvy. Med.
Ambient E
Altair Oil

Tycol Arvella 75

Oilzum 0-64 Oil

A-#59”

Grade

Redind H H

Teresso 85
Lubriplate #4
Parvis A

Hydro-Drive M1H-50

Reliable 50 Oil
Cond. Oil #50 Heavy
Non-Fluid Oil “

Grade
Utila #6
Puroco Extra Hvy.
Carnea Oil 69

Rubilene Hvy.

Vactra B B
Stanolex #95

Indoil #95

Dasco #10

Solnus X-Heavy

Ambient F

Arcturus Oil

Tycol Arvella 82
Oilzum 0-65 Oil

A-Sixty/EP”

4

•Includes
jProducts

Standard Oil of Pennsylvania, Standard Oil of New Jersey, and Colonial Beacon Oil companies. Available also from Humble Oil & Refining Company; and as Teresstic and Spinesstic from Penola Inc., Carter

also marketed by Arkansas Fuel Oil Company.

[4]

[5]

Oil, and Gilmore Oil companies.

;

Oil Company

Atlantic
Alemite Corporation
Cities Servicef

C. Ii. Clark Oil Co.

Continental

Esso Marketers*
Fiske Bros.
Gulf

Houghton
Kendall Refining Co.

New York and New

Lubricant Co.

Pennzoil

Pure Oil
Shell
Sinclair

Socony-Vacuum

Standard of Ind.

D. A. Stuart Oil Co.
Sun Oil
Swan-Finch Oil Corp.

Texas Company
Tidewater

White & Bagley

Jersey

G

1700 Lubrication

Eureka Oil Q
Alemite Industrial Oil #5
Sentry #12

Parlube 170
Redind Spec. Hvy.

Teresso 120
Lubriplate #4
Parvis Oil B

I-C Oil A
Vital E. P. SAE 90

The 2000 Mile Oil 60 (J)
Non-Fluid Oil

“

D-#19

Pennbell #6
Puroco Super Hvy.

Carnea Oil 73
Rubilene Extra Hvy.

Vactra AA

Stanoil #150

Dasco #18
Solnus Special
Dytac G

Ursa Heavy
Tycol Arvella 90

Oilzum 0-66 Oil

” Grade

H

Special Ways Lubricant

2000 Lubrication

Atreco Oil Q
Alemite Indus. Gear Oil
Pacemaker #9

Penn-Pacemaker #10
Parlube 200

Redind N Heavy
Pen-O-Led EP4
Lubriplate #8
Senate Cyl. A

I-C Oil B

Vital E. P. SAE 90
The 2000 Mile Oil 70 GG

Non-Fluid Oil

“

D-#17

” Grade

Cyl. Oil #11

Pure H-Mineral
Vitrea Oil 74
Rubilene Super Hvy.
Vactra PIH

(With Additives)

Magic Oil #1
Alemite
Koolmotor Gear

Trojan Gear #90 AP
Sea Gull E. P. Lubricants

“C” Redind Heavy
Teresso
Lubriplate #3
Gulf E. P. Lubricants

#65, 75, 95 & 115

Sta-Put #
E. P. Gear Lube. SAE 90

D-#1S/EP
Lubricant #612

Poco Purelube EE
Tellus Oil 41
Rubilene MX
Gg. Vactra Oil No. 2

Special

J

SAE 90 (E.P.)

#90 AP

V-55

330_.

(300 S.U.V.

Ball Bearing

Grease

Lubricant #64
Alemite No. 38

Trojan M-2
Sea Gull 393 Industrial Lubricant

Cup or Plain

Bearing Grease

Lubricant #102
Alemite No. 33
Trojan P-2

Sea Gull 398 Industrial Lubricant

Soluble Oil or

Grinding Comp.

Atlantic Soluble Oil
None
Chillo Oil “A” or “T

Sea Gull Transol

”

Sea Gull Grinding Compound
Conoco Racelube
Andok #M-275
Ball Bearing Lubri.
Precision Grease #2

Absorbed Oil #042

■

No. 50 Fibre Grease
Non-Fluid Oil “

Pennzoil Ball and Roller

Bearing Lubricant

I

i

—

Purolene Bearing
Nerita Grease #2
Bearing Grease AF #2
BRB #3

F-#926” Grade

Conoco Cup Grease #2
Castroleum #1
Lubriplate #107
Supreme Cup Grease #2

Absorbed Oil #100

No. 2 Cup Grease
Non-Fluid Oil “

N-fl2

” Grade

Cup Grease #2

Super Service #2
Unedo #2
Opaline Pressure Grease #2
Gargoyle Sovarex No. 1

Conoco Soluble Oil “S”

Kutwell #60

Fiske’s Magic Comp.

Gulf Soluble Cutting Oil A

Antisep Soluble Oil

PIoughto-Grind (Paste)

Maxzol Soluble Oil

Tranzol Soluble Oil
Purosol #10
Drombus B
Satisol Soluble Oil
Solvac 1535

Compound 25-B (anti-loading)

Light table ways)

Stanoil #200

Gg. Vactra Oil No. 4

Special (1000 S.U.V.

Heavy table ways)

Stanolex

#51

—

Stanobar #2

i

Superla 42#

S/V Sultran B6 (Thread Grinding)
Superla Soluble Oil

Standard Paste Comp.

Dasco #B-20
Pittsburgh Cyl. Oil
Dytac H

Texol J
Tycol Arvella 90

Oilzum 0-66 Oil

Sturaco L-30
Sunoco Way Lubricant
Adfilm No. 2

Way Lubricant “D”

L

Tycol Artisan 14
Economy E. P. Lubricant

Dasco #2 I-IMP
Sun Ball Bear. Grease
Safco No. 424

Starfak Grease M
Tycol Armitage 16

Tycol Armitage O (Pres. Gun)
Oilzum #2

D-21

Dasco #60
#300 H.D. Gun Grease
Cataract No. 52

Texaco Cup Grease #2
Tycol Akup 20

Oilzum #3

Codol
Sonoco Emul. Cutting Oil
Solrex Soluble Oil

Catac Grinding Compound

Soluble Oil D
Tycol Amulkut 4

Econom}' #E-1 (Paste Comp)
Economy #1SSS (Liquid Soluble)

iv

^Includes Esso Standard Oil Company and Esso Standard Oil Company of Pennsylvania.
fProducts also marketed by Arkansas Fuel Oil Company.

[6]

|

'

i

""Includes Esso Standard Oil Company and Esso Standard Oil Company of Pennsylvania.
fProducts also marketed by Arkansas Fuel Company.

[7]

‘

■

r

F

f

;
!

!

RESERVOIR CAPACITIES OF NORTON MACHINES

Coolant

I

Grinding Machines

i

,

4" Type C
6" Type C

6" Type C Angular.

10" Type LC....

6" Tvne C.T.U.

10" Type L.C.T.U

10" Type C
10" Type C.T.U
14" Tj'pe L.C.T.U

10" Angular (45° Hand)

10" (30° Hydraulic)

14"-16" Type C.............

20" and larger—Type
36" Traveling

Cam-O-Matic
#2 Cam-O-Matic
Crank-O-Matic

6" Surface

8" Surface

10" Surface*
12" Surface*

Bura-way

£1 Tool and Cuttert- . •

#2 Tool and Cutterf
#2 Cutter and Tool

#20 Cutter and
Multipurpose, 12", 14"

and 16"

10 x 20"

Autopart—Hyd
23/26" Hi-Swing.

Heavy Duty Hi-Swing..

16/40" Piston Rod
Car Wheel
10" Twin-O-Matte

Full Automatic

........................

........................

.

......................

..............

Wheel.

...................

.............

................

.........................

.........................

..................

.....................

...........................

Tool.

.........................

Universal

................

Mech

.............

.........................

................

.........

.........

....

.........

......

.........

.........

..

-----

D

..

24", 36", 4S", 60", 72"

. . .

. . .

Nominal

Work

Length

12" and IS"

IS" and 30"

IS"

IS" and
IS" and 30"
IS" and 30

IS"
IS"
IS" to 120"

36" to 72"

36" to 192"
96" to 192"

120" to 240"

26", 30", 36",
26" 30" 40"

32"

’ 42"

24", 36", 4S", 60"

36", 48" and 72"

36", 48", 72"

36" to 120"

96", 120", 144"

5134" to 6534"

to
to

36"

’ 62", 72"

IS"
24"

20"

22 x 72"
22 x

72"

3G"

18"

30"

120"
120"

77

42"

Spindle

Reservoir

(In

1
234
3 34

234

{

4K

Wi

434

734

734

6

634

7
7

7

414
7 34

6

(34 Pint Each)

Prelubricated

(34

Pint)

1

Prelubricated

Oil Cups

(34 Pint)

Prelubricated
Prelubricated

134

Prelubricated

434
434
4 K

7
7

Gage Oil Cups

4

K (each)

434

Qls.)

Hydraulic
Reservoir

(In Gals.)

24
25
24

25
32

47

38
38

None

2034
50

None
None

50

36

50

70-80-90-105-115

1134

20

15-20-20-20

None
None

934

None
None

17

35

38

None
None

50
None
None

36

47

Hcadstock or

Workhead Each

(In Pfs.)

None

l
1

i

None

"None"

1
None
None

1

1
None
None

None

7

4

5 K

None
None
None
None

None

Oil Cups
Oil Cups
Oil Cups

Oil Cups

2

Prelubricated

1

None
None
None
None

18

Oil Cups

34

Automatic

Automatic

Automatic

Food

Screw

(In Qfs.)

Automatic

134

2)4

m

5
5

5
10
10

3

5
4

Automatic

IK

7K

•1

Oil Cups

Automatic

Oil Cups
Oil Cups

Oil Cups
Oil Cups

Oil Cups

Oil Cups

5

334
5
4
4

Oil Cups

334
5

Lubricant

(In Gals.)

34

Oil Cups

Tank

None

34

75-80

None
None
None

None
None

None
None

None

None

None

1
1

1

3_
3

1
334
334

8

134
5

1
234

134

3

1

134

5

5

5

IK

___

K

H

Tank

(In Gals.)

30

40
90

40

50
75
75

40
35

70

100

2045

50
46
50

10
10

70

100

10

None

10

None

None

30

28
50

46
41

70
70

165

50

50

Coolant

Lower

Hydraulic

Lapping Machines

#10 Universal
#16

FC

#2 Vertical—Flat and Cylindrical
Seal-O-Lap
#26 H}rprolap
#30

Cam-O-Lap

#30 Crank-O-Lap
#40 Crank-O-Lap. . .

Simplex—Hand
Simplex—
Simplex—Pneumatic

*In 10 and 12" Hydraulic Surface Grinders
is used in general way. These may include cups, drip oilers (or
in these cups at all times when machine is running. For general lubrication or for cups not specifically designated in
grade machine or red engine oil. Due to variations in castings, etc., capacities may be considered accurate within 10%. Grease
for general
amounts for various special applications such as ball bearings, worm gears, etc. Where

water-insoluble grease.

fMany of these machines are supplied
ffUses Prelubricated Coated

Form 1968-1

........................................

Vertical

...................................

.............................................

........................................

....................................

. . .

.........

Hydraulic

.

application at

P-12-48-3M

cups and fittings should be of a semi-fluid, non-graphite type. Use freely. Use proper grease in correct

with

Abrasives.

Reservoir
(In Gals.)

the

hydraulic reservoir capacity varies in ratio to length of table. Term oil cups

Prelubricated Antifriction Bearing Spindles.

None
None
None
None

10

None
None

5
5
5

5

Headstock

(In Gals.)

Oil Cups

sight

feeders) and cups used as

None
None
None
None
None

1
1

K
K

iV

Lap Drive

(In Gals.)

134
134

3

134

10
None
None
None
None
None
None

coolant

Rear Worm

(In Gals.)

None
None
None
None

None
None
None
None
None
None

oil level indicators. Maintain oil

is

apt to enter bearing, use special

Drive

5

10 (Optional)

chart,

Printed In U. S. A.

Tank

(In Gals.)

None
None
None

110

20
20

40

25

25

Noneff

use high

»

I

,

>IM ORTON

\

v

V'

^ ^ Lubrication

Norton Company, Grinding Machine Division, Worcester 6, Mass., U.S.A.

(Supersedes Sales Engineering Bulletin #25F and Supplement dated July 19, 1945)

THE LUBRICATION

AND

Lubricating and hydraulic oils, greases and grinding
lubricants, applied in the operating of Norton Grind
ing Machines should be of a correct type and good
quality. The information compiled in this bulletin
will be valuable to the user of Norton machines to
get maximum production with minimum down time.

To evaluate the physical properties of an oil, the

term viscosity is used which indicates the measured
resistance of an oil to flow at a given temperature,
portraying its ability to maintain a liquid film sepa
rating surfaces upon which power may be transmitted.
The Saybolt Universal Viscosimeter represents the

U. S. standard means of determining the time in
seconds for 60 c.c. of oil to flow through a standard

orifice at a specific temperature. The viscosities

indicated will be identified at 100° F. for simplicity

of control.

Identification of the viscosity represented by the
s.u.v. at 100° F. is the abbreviation for Saybolt
Universal Viscosimeter, or s.s.u. meaning Saybolt
Seconds Universal.

U. S. Standard
South American Standard

British Standard
Continental Standard

Oils for hydraulic and circulating systems must be
well refined to maintain stability of the oil or freedom
from oxidation within the limits of temperature and
pressure under which an oil of this type must func-

...................

................

....

LAPPING MACHINES

Saybolt

Saybolt
Redwood
Engler

OF NORTON

Bulletin

GRINDING

tion. The residues formed during the oxidation of
a petroleum oil are in the form of gum or varnish



which will adversely affect the sensitive valves of the
hydraulic control mechanisms. This will also be the
cause of plugged or choked pipes in a central lubricat
ing system. The pour point of an oil indicating the
point at which an oil is no longer a fluid will present
a problem only when equipment is exposed for long

periods of time to low temperatures, or when the new
oil in drums is stored in the open with no physical



protection. To assure correct function of the hy
draulic system, a high grade oil, well refined and

free from impurities, must be applied.

The lubrication of any grinding wheel spindle may
be considered critical to the successful operation of
the entire machine. Norton
to this rule. For spindle oil we recommend the use
of the highest grade oil with viscosity of 50-60 s.u.v.
at 100° F. for use in all Norton machines with plain
bearings, both internal and cylindrical type.

Norton Company advises that the oil be free from
any form of contamination, be stable and operate
with freedom from oxidation. No additives should
be present in a spindle oil that would involve chemical
action at the interface of the bearing. The oil should
be of such quality, and carry the guarantee of a

reputable refiner.

The spindle oil outlined will replace previous speci

fications identified on the grinding machine by a metal

plate attached to the wheel slide.

Grinders are no exception







I

I
i

:

■ >

’

}■■■

Wheel spindle lubrication plates on new and more

,

recently built machines are in accordance with the
recommendations given in this bulletin. Any plates

:

shown

as

recommending a kerosene mixture should

be

disregarded. Spindles manufactured by the Nor

ton Company are covered for lubrication with detailed
instruction here or in the service manual. Ball bear
ing and integral drive spindles are to be lubricated
in accordance with manufacturer’s instructions.
Sealed bearings, as the name implies, require no

additional lubrication as they are sealed for the life
of the bearing.

Antifriction cartridge type spindles require elab
orate equipment to repair and re-adjust. The Norton
Company requests that these spindles be returned to

the Norton Company or to the manufacturer for
adjustment and repair. Unauthorized servicing will

automatically cancel our guarantee.

The selection of correct grease will be governed by
the speed, temperature and exposure under which it
must operate. Ball bearings at low temperatures
require a soft cup grease. High temperatures require
a high grade soda soap grease which possesses a high

I

repellent grease. All greases must be stable, of good

melting point. When moisture is 'present

, use a water

quality, and in pure form free from fillers. The

grease should be kept free from dirt and all forms of
contamination. In general, bearing manufacturers
recommend a ball bearing be filled from one-third
to one-half and be approximately maintained at that
level. Greases must not bleed in operation. When



the oil bleeds from the soap in a grease there is the
danger that the dried soap left by the separation will



be the cause of mechanical failure. Stability, there

fore, is of extreme importance in grease selection.

In the design of Norton Grinding and Lapping

Machines, unusual care is taken to guard against

the dilution of the oil in the hydraulic system. It
is not altogether possible, however, in every case to



prevent some splash, spray or mist from entering the
hydraulic reservoir. For this reason, it is extremely
important that the oil should not be contaminated by
emulsifying agents. These will create a physical
change in the oil, forming an emulsion or sludge,
which will cause serious operating trouble to the
sensitive valves in the hydraulic control system. We

advise that the hydraulic system he drained and refilled
when evidence of contamination is obvious.

In certain cases, conditions of the weights, etc., of
the wheel slide or sliding table are such that a special
ways

lubricant is desirable. In this event the in
formation contained in column J will be found to be
of assistance.



£

f V

Y

Wheel Spindle Lubricant

......................................................... change after 500 hours of service

Hydraulic Oil .
Ways Lubricant
Feed Screw Lubricant

..........................................................change after 500 hours of service

..........................................................change after 1000 hours of service

Gear Box Lubricants .

Oil Cups

GENERAL SUGGESTIONS

. change after 500 hours of service and thoroughly clean reservoir

change after 2000 hours of service

fill daily

[2]

'

MOUNTING THE WHEEL

9

order

grinding wheel, be sure it does not fit too tightly on the
wheel sl^ey'e

« Use the blotters supplied with the grinding

avoid any possibility of cracking the

wheel and tighten the flange screws evenly. Tighten one screw
until snug, then take up the diametrically opposite screw
snugly

Then draw up the screw 90° from the others, and con

tinue this procedure, taking up a little at a time until all
screws are tightened to 15 ft. pounds,

See that all threads

are free running, clean, and rust free.

WHEEL BALANCING

After a preliminary truing, the grinding wheel and

^L

S^ere ^h2u

ld be removed as a unit,

the balancing arbor

inserted and the complete unit placed on a set of previously
leveled balancing ways. Remove the balancing weights to be

found at the center of the wheel sleeve.

,,

,

the heavy side (at the bottom). Reinsert the weights dia

metrically above center until

n any angular position.

tighten.

Allow the unit to come to rest and mark with chalk

the wheel unit will come to rest

Replace the balancing weights and re-

hemount the wheel unit and retrue the wheel.





HEADSTOCK AND P00TST0CK

Cde^n the headstock, the footstock, and their centers

and center holes. Be sure there are no nicks or burrs

centers and that they seat properly in their
Never move the head
clean

.

or footstock unless the swivel table is

respective holes,

ELECTRICAL CONNECTIONS

4. „

cabinet of the machine when it is shipped.

Refer fco the wiring diagram included in the

control

Connect the incoming power lines to the terminals
marked Customer's Connections" with a red tag on the dis
connect switch.

A yellow tag attached to the control panel

gives the proper voltage, cycle, and phase.

Check for correct wheel motor rotation and if

correct, reverse two of the incoming line connections.

on the



not

GRINDING COOLANT

10

Whether soluble oil or a paste type coolant compound
is to be used (mixed with water)
is rich enough to prevent rusting.

* see that the coolant mixture

Coolant tank capacities are

approximately as follows:

6" Type CTU

55 gals.

10" Type CTU

75 gals.

WHEEL SHEAVE SELECTION

Three whee

1 spindle belt sheaves stamped to show the

corresponding wheel sizes with which each should be used are

supplied with the 10" Type CTU Machine. Two wheel spindle

belt sheaves similarly

stamped are supplied with the 6" Type

CTU.

With the hinged portion of the wheel guard in proper

position, a safety lever will prevent the mounting of any but

the proper size belt sheave. However, BE SURE THAT THE SAFETY

SHAFT IS ATTACHED TO THE HINGED PORTION OF THE WHEEL GUARD, and

that the hinged portion of the wheel guard is as close to the
grinding wheel as is possible without causing interference,
when changing the wheel spindle sheave.

OPERATION EXPERIMENTING

For the operator who is not familiar with these
machines, it is advisable that a little time be spent in
determining the functions of the various controls,
care in this so that no damage will result,

Read the details

Exercise

as given in Section IV for the particular machine concerned.

Before starting, see that all oil and grease cups are

filled, and that oil in reservoirs is at proper levels,

Refer

to the Lubrication Chart on Page 21 for assistance.

Place the headstock and the footstock at the extreme

ends of the table and centralize them with the grinding wheel.
Set the table reverse dogs so that the table will travel
about 6" and the table movement does not bring either the
headstock or the footstock too near the grinding wheel. Before
starting the pump motors, be sure that the table "start-stop"
lever is in the ''stop" position.

Naturally, it should be seen
that it is in the stop position until everything is known to
be in readiness to run the table.

For general information on grinding procedure, refer

to Section V, starting on Page 28.

SECTION II

UNIT CONSTRUCTIONS

TABLES AND TAPER ADJUSTMENT

11

Type CTU Machines are built with two tables, a

sliding table which travels on the flat and vee ways of the
base, and a swivel table pivoted in the center on top of the
sliding table.

The swivel adjustment is at the right end of the

table and provides a means for making taper settings.

The

graduated gib is intended as a guide only and any finer adjust

ment may be obtained by the trial

adjusting screw at the front.

and error method, using the

(See Page 6)

HEADSTOCKS

Two types of headstocks are built,

live center.

In the dead center type, the center remains
stationary and the work drive plate revolves about it.
the live center type, the spindle, center, and work drive

one dead and one

In

plate revolve as a unit.

The stopping and starting of the work drive motor is
accomplished automatically on all machine arrangements,
ever, if desired, this motor may be operated by push buttons

located on a panel at the left front of the machine,

switch marked 'Hand-Auto'

1 is provided for this purpose.

How-

A selector



Both the dead center and the live center types of

headstocks are driven directly

through vee belts.

Study of

the headstock drawings in the back of this book will clearly

show how, by means of eccentric shafts, the belts are adjusted.

The ball bearings of both dead and live center head-

stock are preloaded and prelubricated so that no attention is

required

.

The clamping of the headstock to the swivel table is

obvious and should present no difficulty.

FOOTSTOCK

The footstock of both the 6" and 10" CTU Machines is

the lever type with spring compression control,
movement of the hand lever retracts the center,
type CTU Machine a further movement of the lever locks out

The initial

On the 10"

the center in its retracted position.

Both the 6" and 10 footstock spindles are clamped
by means of a large hand knob on the front of the footstock
body.

Spindle Oil Filter

Oil Pressure Adj.

Spindle Pec ip. Adj.

Shoulder

Stop

Spindle

Gr.

__

Box Inn®£

Spanner Hut

Spindle

End Thrust

Spindle
Spindle

^

Adjustment

Box

Box End Spanner

Wed<ge

Bolts

Nuts

lN6Q2<q R

WHEEL SLIDE UNIT

(See Page 17)

.

flat ways. In Type CTU Plain Machines and in manual opera-

ion of semiautomatic machines,, a feed screw meshing with a

cast iron half-nut bolted to the under side of the wheel

The wheel slide unit

___

- moves on hand scraped vee and

slide body imparts this motion.

On Semiautomatic Machines in hydraulic operation of

le

wheel slide unit, the feed screw and the half-nut move as

a unit to rapidly position the grinding toward or away from

the work piece. This movement is caused by a direct thrust
irom the large wheel slide piston rod.
of this is given later.

A detailed explanation

The grinding wheel spindle runs in long, hard bronze

.

earings

, tapered on the outside diameter. Spanner nuts on the
inner and outer ends of the bearings hold them rigidly in place
and provide a means of adjustment.
ted in a slot in each bearing, and these keep the bearings

expanded and in alignment against the casings.

bolts should be kept snug at all times, except when making

Two wedge-bolts are loca

The wedge-



bearing adjustments.

WHEEL SPINDLE BEARINGS ADJUSTMENT

(See Page 13)

NORTON wheel spindle bearings seldom require
adjustment. This should be undertaken only when there is
evidence that it is absolutely necessary,

In these cases,

the following procedure should be followed:

1.

Remove belt sheave, the grinding wheel,
its sleeve, spindle housing cover, the
lubricating pump within the housing,

the worm gear and yoke

.

Drain the oil

and

and

reservoir.

«

2.

Take up bearings a little

at a time. 3

wedge-bolts $10CTU-130 on each bearing, and

the outer spanner nuts #10CTU-ll4 and 136.

Now take up slightly on the inner spanner
nuts #10CTU-117
wedge-bolt nuts.
tightening of the nuts until

. Finally re-tighten the

Continue this loosening

the spindle

__

Loosen

will just turn with a wrench.

3.

Now remove spindle, wipe dry, and apply
Prussian blue sparingly.

Re-insert spindle,
turn it several times, again remove it, and
scrape out the high spots on the bearings.

Continue this procedure until

a

good bearing

is obtained, yet the spindle runs free.

4.

Thoroughly clean and reassemble with fresh
oil of the proper viscosity.
the spanner nuts are not too tight

Be sure that

.

IOCTU 225”

IOCTU 226-Taper Pin (2)
IO

CTU 227 -IndicaTor
IOCTU 2 28_ St
IOCTU 229-
IOCTU
IOCTU 2 3 1- Spring

230-

Control Lever Shaft

Support

cl. Straight-

Adj usting

Arm

----------------------

----------------

______

Screw

Pin_

IOCTU 2-4 3 -Lever End

IOCTU

_

V

*0

/ IO CTU 245-

AlOCTU

/

/ / IOCTU 24©-

yC/

><>s^

2*4-4- Spring

246-

IO CTU 247-

IO

CTU 249

Bearing

Cam

Pin

Adjusting

-Thrust YoKe
Stud

Screw

mnn

IOCTU 232-

IOCTU 233-

IOCTU

IO CTU 236-

IOCTU 2 37-Thrust Ring

235

IO CTU 2 38-Thrust YoKe BracKet/,

IO CTU 2 39- Spring Pin (2 )----

IOCTU 240-

IOCTU 241-

IOCTU

Control
Wheel Slide

Cover- Center^

IOCTU 234-

-Thrust
Thrust

Stud (Upper).

242”

Lever

YoKe Pin

YoKe

Connecting

Spring

Thrust

Stud (Lower)

Norton

Knob

__

Rod^

----------------
Ring

//

^ &

/

f';-;

32}

II

§

d

k-

A

%

■v/

)

Ik

i 1

|\H

i

/
/

/

/

v?

|>

finjj

ml

IO CTU 250-

___

\lO CTU 251-Eccent-ric Cap

-IOCTU 252-Drive Collar

YlOCTU

.IO CTU 2 54-Thrust

IOCTU 255-

IOCTU 256

IO CTU 257-
.IO CTU 2 58-Oil Pump
.IOCTU 2 59-Oil Pump Body

IOCTU 2 60-PumpQear-Idler
JO CTU 2 61 - Oil Pump Cap
.IOCTU 262-

253-

Adjusting

Screw N

Eccen-tric

LubricaTing

Pump BracKet

-Worm Qear
Pump Drive Shaft

Pump Qear-

Driver

ut

Washer

Spacer

SE-670-A

SE-671-A

RECIPROCATING £ SHOULDER GRINDING ATTACHMENT

drv.-n. by Harkxrt LRand

tr + L*H1cr«d by VicVy

IO* CTU

Adam»Ky

l6

SPINDLE RECIPROCATING AND
SHOULDER GRINDING ATTACHMENT

(See Page 15)

An eccentric bushing #10 CTU-253 on top of the
spindle lubricating pump shaft is adjustable to various
amounts of eccentric motion and imparts an oscillating motion
to the hinged yoke #10 CTU-236. Through this swivel yoke and
spindle thrust collar., the spindle is given a reciprocating

motion as long as the control cam #10 CTU-246 is not in
contact with adjusting screw #10 CTU-248.

As the control lever #10 CTU-232 is moved to the

left,

the cam and adjusting screw mentioned above are in

contact and a further movement of lever #10 CTU-232 will bring

thrust yoke stud #10 CTU-249 away from connecting rod #10 CTU-
240, thereby stopping the spindle reciprocation and causing
the spindle to move steadily to the left for shoulder or side

grinding. This lateral movement of the spindle is shown on

the dial indicator

PUMP UNIT

as

the actual amount of stock removal.

(see page 7)

The combination lubrication and hydraulic pump unit
is accessibly mounted on the right side of the base immediately
beneath
are two pressure relief

hydraulic and lubricating oils.
for 6" Type CTU Machines should be approximately 175 pounds
per square inch.
approximately 200 pounds per square inch.

the wheel spindle belt guard. Attached to this unit

valves to set the pressure of the

The hydraulic oil pressure

For 10

11 Type CTU Machines, it should be

Lubricating oil

pressure should be 3 pounds per square inch.

On the discharge side of both the lubrication and

the hydraulic oil pumps are filters,

These should be checked

periodically and given such attention as may be necessary.

A strainer for the hydraulic oil is located in the

suction line of the hydraulic pump beneath the wheel slide.

This should be checked periodically

to

prevent clogging.

WORK START-STOP UNIT

The work rotation is automatically started and
stopped on all machine arrangements and this unit is lo
cated inside the left front apron,

A limit switch is
operated by hydraulic and spring action so as to start and
stop the work drive motor,

A selector switch mounted on



the left front panel may be turned to "HAND" if manual con

trol is desired.

$

LlO CTU

LlO

----IO

CTU
__IO CTU
__IQ

CTU

__IO
—IO

—_IO CTU
__IO

CTU
— IO CTU
_IO
__IO
__IO

CTU

CTU

— IO CTU

SE-6-74-A

SE-0T5-A

LlO CTU 27 8

MO CTU 279

LlO CTU

LlO

CTU 281

I—IO CTU 282-

-----IO

CTU
IO CTU
IO CTU 285

IO CTU 286.
IO CTU 28"7 (2).
IO CTU 288

CTU

CTU
CTU

CTU

280

200

20 I
202
293

29-4-

295

290

297

298

299
300
30 I

302

B'

7V

280

283

2

84

,IO CTU 27 0

IO CTU 2”7 I

/ IO CTU 272
/ IO CTU 273

C.

p)

!■'

s' '

V/.

/ IO CTU 274

/ / IO

/

/

(2)

—
___
___

___

IO CTU
IO CTU
IO CTU
IO CTU
IO CTU
IO

CTU

IO CTU
IO CTU
IO CTU
IO CTU
IOCTU 313(2)-
IO CTU

IO CTU

IO CTU

COMPLETE WHEEL FEED UNIT

V

303

304
305(2)

300

3

07

308
309

3 I O

31 I (2)-

312

314
315

310

CTU 275

IO CTU 270(2

IO CTU 27 7 \

E

h

-----

-----

-----

-----

-----

----

(2)

-----

------

------

------

___

IO CTU 3 1
IO CTU 318 (2)
IO CTU 319

IO CTU 320

IO CTU 321
IO CTU 322
IOCTU

323(2)

IOCTU 324(2)
IO CTU 325
IO CTU 320

IO CTU 327

IOCTU

328

IO CTU 329

IO CTU
IO CTU
IO CT U 344

IO CTU

F

~7

IO CTU 3 30.
IO CTU
IO CTU
IO CTU
IO CTU
IO CTU
IO CTU

IO CTU

331-

IO CTU 338
IO CTU
IO CTU

IO CTU 3-4-

3-4 2

343

3-4 5

if

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sy

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IO CTU 340

MO CTU

IO CTU

NORTON COMPANY

WORCESTER

6. MASS.

332

333.
334
335
336

337

330

3-40

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347
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18

WHEEL FEED SCREW

(See Page 17)

The wheel feed screw is mounted in ball bearings,
and it meshes with a cast iron half-nut attached to the under
side of the wheel slide,

The feed screw revolves in a bath

of oil.

Counter-clockwise rotation of the wheel feed hand
wheel moves the grinding wheel in towards the work by bring
ing the wheel slide unit forward.

WHEEL FEED MECHANISM

A positive stop and an indexing arrangement on the

hand wheel provides for accurate work size setting.

There are

.40 notches in the indexing hand knob device, and each notch

represents the amount of setting necessary to obtain .0001"
in work diameter reduction.

Push the hand knob inward and
rotate it clockwise to set for the amount of feed necessary
to obtain the desired reduction in the diameter of the work.

The following table gives the work diameter reduc
tion in both the English and Metric systems in operation of
the wheel feed mechanism:





Settings

Each Notch in Index Knob
Complete turn of Index Knob
Complete turn of Hand Wheel

English

.0001"
.004"
.200"

Metric

.0025mm.
.

10mm.

5.0mm.

POWER WHEEL HEAD TRAVERSE (Semiautomatic Machine)

This arrangement is supplied in Semiautomatic Machines
for rapid positioning
feed.
follows

Refer to Page 17 in connection with the description that

.

of

the grinding wheel and for the grinding

The wheel slide rapid traverse piston rod (A) attached
to the end of the feed screw (E) moves the screw and wheel slide
forward as a unit until the rapid traverse piston (B) closes
the main exhaust port (C). Oil is metered out the cushioning

port (D) which slows the speed of the wheel slide. At the
termination of the cushioning stroke, the end of the piston

gently contacts the end of the cylinder which acts as a positive

stop. Two needle valves at the rear govern the rate of the

forward and backward cushioning strokes.

Adjustment of the amount of wheel slide rapid traverse

\/

movement is made by a hex nut on the screw that projects outward *
at the rear of the unit.
amount of the rapid traverse.

Turn this nut forward to decrease the

Back it off to increase the

amount of this movement.

Cross

Feed Screw

Gear

iCrosS'

\

\

1

1
1

1

r

-----

\ r

Feed

Hand

Wheel

Adj. Valve Intermittent

\ \

Adj.Valve Con. Power Plunge Cat Gr. Feed

Adj. Valve Sizing Plants Cut Gr. Feed

Trav.Gr. Feed

Wheel Slid® Solenoid

De-ener^izin^ Button

Wheel Slid© Solenoid

' En@r fixing*' Button

Wheel Feed Rack

Pinion

Housing

Wheel Feed Hyd.

Cylinder

GRINDING FEED (Semiautomatic Machine)

20

Upon termination of the rapid traverse and cushion
ing stroke of the wheel slide in forward movement, the grind
ing feed begins. This is accomplished by hydraulically





rotating the feed screw.

Inside the wheel feed control cylinder is a double
end piston with rack teeth cut on the piston rod. This unit
is shown on Page 19. The rack teeth on the piston rod mesh
with a rack pinion in the housing. As oil is metered out the
end of the control cylinder, the rack pinion and the wheel

feed gear are caused to rotate.

The wheel feed gear causes
the feed screw to rotate, which advances the wheel slide and
brings the grinding wheel into contact with the work. This

feeding action continues until the wheel feed hand viheel
stop contacts the positive stop arm attached to the front of
the machine

.

AUTOMATIC FEED AT

TABLE REVERSALS (Plain Machine)

With the manual control lever (J) as shown on Page 22

turned to the left,

automatic wheel feed at each table reversal
is obtained in traverse grinding. The amount of automatic feed
obtainable at each table reversal is from zero to ,003'
amount of feed desired within this range is set by control (L)

] • The

as shown on Page 22.

The total amount of this automatic feed that is
obtainable is .150" in terms of diameter reduction. This
represents .075" of wheel slide movement. When this automatic
feed is used, there is automatic reset of the hand wheel
after grinding to size.

When it is desired to do traverse grinding without

having automatic feed at table reversals, throw control lever

(J) to the right, which equalizes the oil pressure on both ends
of the wheel feed control cylinder. In this way, the wheel
feed hand wheel may be rotated at will without disengaging the

hand wheel clutch.

To side grind a shoulder or step diameter,

follow the instructions starting on Page 23.

The Semiautomatic Machine also has this feature of
automatic feed at table reversals.

21

RESERVOIR

Spindle

Hydraulic

Ways

Oil Cups

Motors

Spindle

Hydraulic

V/ ays

Oil Cups

Motors

OIL DILUTION

CAPACITY

Qts

32 Gals.

3 Gals.

7i Qts.

38 Gals.

3i Gals.

SECTION III

LUBRICATION CHART

6" Type CTU Machine

LUBRICANT

.

50-60

150

S.U.V.

S.U.V.

1000-1200 S.U.V.

Grease

10" Type CTU Machine

50-60

150

S.U.V.

S.U.V.

1000-1200 S.U.V.

Grease

f! 'J&V-

RECOMMENDATION

Chkng'e^e'very ifhree months

'J [I

i 5"H ~r "

Oil Daily

Check Monthly

Change every three months

11

11

Oil Daily

Check Monthly

11

11

11
"

n

The NORTON Type CTU Machine is

hydraulic operating valves which require clean hydraulic oil

built with various

of good quality in order to operate satisfactorily.

As nearly as possible, care has been taken to prevent

coolant splash, spray or mist from entering the/hydraulic
reservoir which would tend to form^a. harmful emulsion or sludge.

If, however, the oil takes on a yellow appearance,
the indications are that some coolant has entered the hydraulic
system and sooner or later will cause faulty

action of the

delicate hydraulic valves.

In any event, we recommend that the hydraulic and

spindle oil re

servoirs be drained and refilled every three

months of continuous use.

SECTION IV

Operating Arrangements of NORTON Type CTU Plain Machine

22

5

ml

o o

Cycle controls consist of

1.

2.

3.

4.

Work rotation - stop and start
Coolant flow - stop and start

Interlock of table handwheel -

Wheel feed

advance and retract

The Type CTU Plain Machine has the following features for

traverse grinding of work:

J K

p| 9

l£°J Cd

O

9 C

L £

i

L

connect and disconnect

d.

e

f

1.

a.

b

c .

Hydraulic table traverse, selective for grinding and

truing speeds. Single speed hand drive apron with
automatic handwheel interlock.

.

Individual hydraulically controlled adjustable dwell

at each end of table reversal.

Hydraulically controlled adjustable wheel picker feed

at each end of table reversal,

(Revolving feed screw

type)

Automatic or manual control of work revolution stop

and start, with manual jogging control.

.

Automatic control of grinding coolant.

.

Hydraulic means to convert picker feed to manual control

for grinding shoulder and step diameter grinding on

work, without disturbing wheel feed set-up.

Functions

Place work in the machine and engage footstock center in

work.

Throw table stop-start lever (H) full motion to the

left.

§

a.

Table starts traversing and dwells at

each table reversal if desired. (Right
and left hand table dwell controls clearly
identified on front of machine.)

b.

Work revolves with selector switch (S) set

to "AUTO."

c

.

Grinding coolant starts to flow.

d.

Table handwheel (t) is disconnected from rack

pinion.

e

.

Grinding wheel advances at an initial

feed., to take up existing backlash.

Grinding wheel is fed into the work at each

f

.

table reversal, (adjustable by knob (L) from
0 to .003) until work is down to size.

rapid

23

2.

3.

Throw table stop-start lever (H) full motion to the right.

a.
b
c

d.

Move footstock

machine

Table stops traversing

.

Work and coolant stops

.

Table handwheel (T) is connected to rack pinion
Grinding wheel retracts the total amount of

picker feed plus the initial

lever releasing work and remove work from

rapid feed.

.

When it is desired to obtain more clearance between

work and wheel, for loading, proceed as follows:

1.

Declutch wheel feed from feed cylinder by lever (C) when

wheel is retracted.

2.

Crank wheel feed handwheel (A) clockwise to desired clear

ance between work and wheel.

3.

After starting table, turn wheel feed handwheel (a) counter

clockwise until

wheel contacts largest diameter on work.





4.

Engage wheel feed clutch (C) to wheel feed cylinder and

proceed as originally explained.

To side grind shoulder or step diameter on work proceed as follows

1.

When

work is to size and before stopping table traverse,

throw manual control lever (J) to the right.

2k

2.

3.

4 •

5.

a. Converts cycle controls from table-st^p

i

ever (H) to manual control lever (J).

Turn wheel feed handwheel (A) clockwise for clearance

between wheel and work.

Throw table stop-start lever (H) full motion to the right.

a. Table stops traversing.

b. Table handwheel (T) connects to rack pinion.
Side grind shoulder or step grind as desired.
Throw manual control lever (J) to the left.

a.

Converts cycle controls bach to the

table stop-start lever (H).

b.

Work and coolant stops.

c.

Grinding wheel retracts the total amount

of picker feed plus the initial rapid
feed

.

To set Wheel

1.

Declutch (C) handwheel (A) and back off wheel.

Valve (L).

2.

Start table traverse, coolant flow and work rotation
by throwing table start-stop lever (H) to the left.

3.

Feed wheel by handwheel (a) until faint spark from

workpiece occurs, then engage handwheel clutch (cj.

4.

positive stop contacts positive

5.

Rotate index knob (B) clockwise the amount

feed desired by using pointer and graduations

handwheel. Each graduation on handwheel equals .001"
work diameter reduction.
equals .0001" work diameter reduction.

6.

Throw table start-stop lever (H) full right to stop

table, coolant flow, and work rotation, then open

valve (L) so as to give the proper amount of feed at

each table reversal.

Feed Index

:

Put workpiece in machine.

?u~t knob (B) and move handwheel to left until

stop arm (D)

Each click of index knob

.

l

_

‘

of grinding

Clos e

on

7.

Grind a sample workpiece.

If necessary,

final size by movement of index knob (B).

correct for

25

Operating Arrangements of NORTON Type CTU Semiautomatic Machines

T

o o o

El

o o

o

©

/

J K P

The Type CTU Semiautomatic Machine in addition to
having the features (a) through (2) as described under Plain
Machine, has the following features for plunge cut work or
conversion to traverse work:

f

.

Hydraulic means to convert picker feed or

continuous feed to manual control for
shoulder and step diameter grinding on

work without disturbing wheel feed set-up.

Hydraulic rapid wheel head traverse with

g.

adjustable stroke.

h.

Continuous straight infeed for plunge' cut

work.

j.

Means to convert semiautomatic arrangement

■of machine to a plain machine.

k. Electrically controlled timing device to

automatically terminate cycle, if desired.

Functions (with selector valve (P) set to ''PLUNGE.")

1.

Place work in the machine and engage footstock center in

work. Operate wheel head traverse lever (N) toward

operator.

a. Energizes wheel slide valve solenoid.
b.

Wheel

advances rapidly.

c. Work revolves with selector switch (S) set to

"AUTO. '■

d.

Grinding coolant starts to flow.

e

,

Grinding wheel advances at an initial rapid

feed, to take up existing backlash.

f

.

Proceeds to grind at the predetermined rate

of feed; until it is stopped by (D) and sparks
die out.

2L

Electrical timer indicates termination of

grinding cycle* and de-energizes wheel

slide valve solenoid.

h.

Wheel slide retracts rapidly.

Wheel feed retracts rapidly.

j.

k.

Work stops revolving.

1.

Coolant stops flowing.

2.

Move footstock lever releasing work and remove work from

machine

.

Conversion to Plain Machine arrangement

1.

Move selector valve lever (P) to the right.

a

.

Transfers cycle controls from wheel

slide lever (N) to table stop-start lever (H).

Lever control for termination of cycle

1.

Turn selector

switch (S) to "HAND"

* thus eliminating the
electric timer. Then substituting (g) in above functions
by operating wheel head traverse lever (N) toward machine
to de-energize wheel slide valve solenoid.

To side grind shoulder or step diameter on

work* proceed as follows:

1.

When work is to size* throw manual control

the right.

a.

Converts cycle controls from wheel

head

traverse lever (N) to manual

control lever (J).

2.

Turn wheel feed handwheel (A) clockwise for clearance

between wheel and work.

lever (j) to

27

3.

4.

Side grind shoulder or step grind as desired.
Throw manual control

a.

Converts cycle controls back to the

wheel slide traverse lever (N),

To Set Wheel Feed Index

1.

Start machine, load workpiece, push control
to put grinding wheel in back position.

2.

De-clutch handwheel (A) with control
handwheel clockwise several turns,
valves (L & M

of feed at table reversals,
on page 24.

operations

3.

Pull control lever (N) to bring wheel forward,

.

movement the grinding wheel should stop short of the
workpiece.

If it appears that the wheel will contact
the workpiece, immediately retract wheel by pushing
control lever (N).

several more turns.

clearance on forward power movement of the wheel.

lever (J) to the left.

lever (N)

(C) and revolve

)

Note: Valve (L) controls the amount

. , Its function is explained

Close wheel feed

It should remain closed for plunge grind

On this

Then revolve handwheel clockwise

This will provide additional

4* When wheel stops short of the workpiece on forward

movement, feed wheel into light contact with workpiece

by counter clockwise movement of handwheel (A).
re-clutch handwheel by control

5-

Pull o

ut index knob (B) and move handwheel to left

(C).

Then

until positive stop contacts positive stop arm (D).
Now rotate
grinding feed desired. Note: Each click of index

index knob (B) clockwise the amount of

equals .0001" work diameter reduction; each graduation

on wheel feed handwheel equals .001" work diameter
reduction.

6. Retract grinding wheel by pushing control lever (N).
Open valve (M) slightly.

of the grinding feed.

pulling control lever (N) and when wheel begins to

'

This valve governs the rate

Now bring wheel forward by

grind workpiece, adjust valve (M) to obtain the feed
rate desired.

7. When wheel feed stops through contact of positive-
stop on handwheel with positive stop arm (D) retract

wheel.by pushing control

lever (N).

Inspect workpiece

for size. Correct setting as necessary by index knob (B).

8. Set Timer by timing the next piece ground.

GRINDING PROCEDURE AND GENERAL INSTRUCTION

GRINDING FACTORS

■^O

SECTION V

Two major factors govern the quality of finish on a

ground surface.

The first

is

the manner in which the machine
operates and the second is the grinding wheel and the condition
of the grinding wheel face.
engineered and constructed, operate with smoothness and free
dom from vibration

The perfection of the grinding wheel sur-
face, however, is a matter of personal technique and Involves
a skill

on

the part of the operator which may be acquired only

by experience and toward which this booklet may give only

NORTON machines, being carefully



suggestions.

TRUING PRINCIPLES

In preparing the wheel face for grinding,

laid down is that the rougher the face of the wheel,

will be the finish on the work.

Other factors may qualify this

the principle

the rougher

statement to some extent, but conversely, if fine finishes are
desired, the wheel face must more nearly approach a smooth

face

.

Since the dressing of a grinding wheel with a diamond or
other device consists of breaking out of the grinding surface
small abrasive particles to present a new series of cutting
faces, truing for rough finishing will mean taking out larger

particles of the abrasive than in truing for fine finish,

in rough truing the wheel feed Is comparatively heavy with a
fast traverse while fine finish truing demands the lightest

sur-

Hence,

of wheel feeds and the slowest of table traverse.

TRUING DEVICES

Truing equipment varies with the work to be done.
Several devices are available to supplant the familiar diamond,
principally the rotary abrasive or the serrated metal wheel-

type dressers.

Various methods are used for holding the truing
devices to the machine, quick detachable standards being avail
able for attachment of these devices directly to the table,


In

a majority of cases, however, it is found that the diamond tool-
holder attached directly to the footstock is entirely satisfac



tory.

ROUGH TRUING

The routine practice in wheel truing, following the
balancing of the wheel, consists of feeding the wheel into
the diamond about 0.001" and traversing the diamond across the
wheel face at a medium rate.
about 0.001

“ at each pass until a perfectly round wheel is

The wheel should be fed in

assured. This should, the wheel grain being correct, produce
a wheel surface satisfactory for rough grinding.

FINISH TRUING

29

Truing for finer finishes from this point consists
of reducing the speed of the table traverse comparable with
the finish desired and reducing at the same time the amount
of the wheel feed toward the,diamond. In fact, the finest

finishes require that the diamond finish off the truing with

several passes across the wheel face without any inward feed

of the wheel.

TRUING SUMMARY

Good truing technique is obtained only through es-

perience.

Rough truing consists of opening up the grinding
surface of the wheel to expose sharp abrasive cutting edges
necessary for the rapid removal of stock. Finish truing,
requiring a smoother abrasive face, demands the lightest

possible feed of the wheel toward the diamond and the slow



est possible table traverse agreeable with production.
TRUING PRECAUTIONS

Great care should be taken in truing, for on such
care rests not only the quality of the finish but also much
of the expense of wheel wear and the destruction of the diamond,
if this valuable agent is used. Avoid continued truing.

wheel which requires constant truing is too soft or even too
hard for the work and should be replaced. Avoid excessive wear
of the diamond on wheels which are too hard. Avoid a heavy
truing feed and then sluicing on the coolant since, after the

A

diamond is heated up, such a flood may crack the stone or loosen
it in its nib.
center of the wheel since this will aid In avoiding striking

Always bring the diamond onto the approximate

the side of the nib with the side of the wheel.

WHEEL SELECTION

The selection of a grinding wheel is influenced by

many factors and naturally a manual of this nature can give

only suggestions on a proper choice.

However, the operator
or shop foreman is urged to exercise intelligent discrimination
in making his selection.
quality of work be affected by the use of proper wheels, but

Not only will production and the

wheel expense itself, an important item, is seriously influenced

by such selection.

30

I

There is a NORTON wheel for every grinding need.

Hundreds of combinations of grade

, grain, and bond are avail

able and a good general rule in wheel selection is found in

The harder the steel, the softer the wheel." (There are,
naturally, exceptions to this rule in the harder, brittle
alloys which require a hard wheel since there is but slight

grain penetration.)
ALUNDUM

ALUNDUM is the trade name for Norton Company's

aluminum oxide abrasive wheels.
the work to be ground is of steel or a steel alloy.

They are most suitable where

these wheels are adaptable to the majority of cylindrical

’

In fact,

production work.
32 ALUNDUM AND 38 ALUNDUM

For extra sensitive steels it is suggested that a
wheel made of 32 ALUNDUM or 38 ALUNDUM be used since such a
wheel has less tendency to burn the work.

57 ALUNDUM



t

57 ALUNDUM is another member of the NORTON family of
ALUNDUM abrasives.

mediate between the tough regular ALUNDUM and the friable 32
or 38 ALUNDUM abrasives,

general purpose grinding on denser and harder alloy steels

Its grinding characteristics are inter

Hence, it is an ideal abrasive for



where stock removal is normal and corner wear is not a factor.
CRYST0L0N

CRYST0L0N wheels, of a hard, sharp abrasive, are best
suited for grinding cast iron, non-ferrous metals, non-metallics
and certain exceptionally hard materials.
rubber, soft brasses and bronzes, aluminum, copper, glass, and

This category includes

the cemented carbides.

FACTORS AFFECTING SELECTION

Knowledge of the material to be ground alone, however,
is not sufficient basis for proper wheel selection, especially
in high production work. Other factors such as the area of
contact -between the wheel and the work, the type and condition
of the grinding machine itself, wheel speed and work speed,
are

all important factors.

Obviously, with such a variety of factors to be

con-

sidered, expert guidance may be required in making the proper
wheel selection, and to this end it is suggested that a

’ Norton

Company wheel representative be consulted wherever possible.

31

The "Handbook on Abrasives and Grinding Wheels"

that is shipped with each machine is recommended as expanding

the suggestions contained in the foregoing several paragraphs.

WORK SUPPORT

For practically all traverse grinding and many

plunge-cut operations, the use of steadyrests must be con

sidered essential if quality work is desired. The steady-

rest supports the work being ground and at the same time aids
in dampening vibration.

A standard two-bearing steadyrest

is ordinarily used for this type of work but other types may



be supplied.

The steadyrest should be used with the skill

experience.

In ordinary use the under bearing is brought up

snugly against the work while the front bearing rests lightly
but without play against the surface being ground. This bear
ing is fed in toward the work as the diameter decreases but

caution should be used in applying too great a pressure which

of



will spring and distort the work.

The number of rests required depends entirely on the

work to be done. Naturally, a long slender piece will have a

greater tendency to spring than a short stubby bar. No set

rule may be laid down for the number of rests to be used on work
in general as the depth of the grind, the grade of the wheel, and
the material must also be considered as factors.

SETTING-UP ROUTINE

This, of course, will vary somewhat whether the
grind be traverse or plunge-cut operation. However, the
following remarks apply to all cylindrical machines.

On setting up the machine, the headstock and foot-

stock should be first

set to accommodate the length of the

work piece. These units may be set anywhere on the table

but the best practice

is to

have the center of the work piece
come approximately over the center of the table to equalize
the thrust on the table pivot.

Next, true the grinding wheel
and take a light cut across or into the work. Check the work
to determine how much material shall be removed and also, in
traverse grinding, determine what taper adjustment, if any, is

necessary. After making such adjustment and settings, take
another light cut.

Experience will teach the proper adjustment

to make to overcome a known taper.

INDEX SETTING

32

When the machine is grinding straight within the

established limits, again determine the amount of stock to

be removed and set the index accordingly. When the piece
has been reduced to the size to which the index was set,
again check the piece itself and if necessary, make a correc
tion in the index setting and reduce the piece to size.

WHEEL WEAR

If there is much stock to be removed or if the
grinding wheel is too soft for the job, it may be found that,
due to wheel wear, the piece is somewhat oversize.

Wheel
wear cannot- be completely avoided, but it can be controlled
by proper wheel selection.

should be corrected by control

Excessive stock to be removed

of

the lathe or previous

process limits.

WHEEL BALANCE

Unless the grinding wheel is correctly balanced
good work cannot be produced. Because a grinding wheel was
balanced correctly when new does not necessarily mean that
it will be in balance after being used.



CARE OF CENTERS

Examine the centers frequently to see that they have

not been scored. Also, be sure that the center holes in the

work are of sufficient size, of the correct angle, and that

they are clean and well lubricated.

If the center holes are
damaged, rough, out of round, or of the wrong angularity,
fine finish work cannot be produced. Should the head or foot-
stock centers be removed, be sure to wipe off the shanks and

also the spindle hole before replacing the centers.
the center shank for dirt or nicks.

A small grain of dirt or

abrasive may prevent the center from seating properly.

Inspect

condition of the centers or the center holes is a most common
cause

of

poor grinding.

The

WAY LUBRICATION

Be sure that plenty of oil is delivered to the table
and wheel slide ways at all times. This oil, supplied by its
own pump, enters the baseways at one or more points, travels

between the sliding table and the base and drains back into the
reservoir at the ends of the base ways.

GRINDING COMPOUNDS

The selection of a grinding coolant is left to the

judgment of the operator or shop foreman. There are many

satisfactory compounds on the market and the selection is

properly influenced by the work to be done and the finish

33

desired
five pounds of such compound in the tank in the machine's base,
adding

.

A good coolant is ordinarily well mixed by placing

enough water to fill

the tank.

SODA COMPOUNDS

In the operation of a machine containing hydraulic
units, warning is given against the use of any coolant contain
ing soda. It is found that soda compounds, coming in contact

with the oil in the hydraulic system, have a tendency to form
an insoluble soap film on the close-fitting valves which leads



to sticking and faulty operation.

CLEANING COOLANT TANK

It is recommended that the machine be cleaned regu

larly for, despite a built-in settling

tank, grit and metal



particles have a tendency to ’’float" In the coolant, which
may mean recirculation to the possible damage of a fine finish.
Where finish is of importance, one of several commercial coolant

filters may be used to advantage.
WHEEL SPEED

NORTON grinding machines are built to give a surface

speed of approximately 6,500 feet per minute to the grinding

wheel. As the wheel wears smaller, this surface speed, of

course, becomes less until a point is reached where the wheel
action is noticeably different. The wheel will appear to act
softer and will require more frequent dressings in order to

obtain the finish desired as the wheel speed decreases.
SPINDLE SHEAVES

To maintain the proper wheel spindle speed, each
machine is supplied with extra wheel spindle sheaves,
viously mentioned.

These acting in conjunction with a warn-

ing-safety device, will give approximately correct speeds,

pensating for decreased wheel diameter. As the wheel gets

smaller, the operator should move the wheel guard hood back

as pre-

com-


ward and at a certain point the safety device will rub on the
inner surface of the spindle sheave, warning that a change of
sheaves is necessary.

is unable to apply a new and full-size

the proper pulley, the safety device thus preventing over

The reverse is also true and the operator

wheel without applying



speeding of the wheel.

ADJUSTABLE SPEED WHEEL DRIVE MOTOR

When the grinder Is equipped with an adjustable
speed D.C. wheel drive motor, the operator has at his command
a variety of speed for his instant selection.

Care should be
exercised that the maximum safe speed for the grinding wheel
is not exceeded.

work

:

speeds

34

It is, of course, necessary for production as well as
quality grinding to establish the correct work and traverse
speeds. The work speed will depend on the nature of the material
the grade and grain of wheel being used, and the finish required.

In general, it is stated that the work and traverse speeds should

be the highest possible consistent with the quality of work de

sired.

Work speeds, where a D.C. work drive motor is used, are
obtained by a rheostat or drum controller. With A.C. work drive,
they are obtained by belt change. Increasing the work speed
tends to make the grinding wheel act softer.

Decreasing the

work speed makes the wheel act harder.
TRAVERSE SPEEDS

The traverse speed should be so adjusted that the

table, when rough grinding, advances a distance slightly less

than the width of the grinding wheel with each revolution of
the work,

reduced

•For finish grinding, the table speed is greatly

.

The hydraulic traverse arrangement of these machines

offers an infinite number of speeds at the twist of the wrist.
Experience alone can tell the operator the exact speed which
will be best suited for his job.

VIBRATION

Vibration in a grinding machine is a common cause of

difficulty and precludes all chance of attaining a fine finish.

Frequently, the cause may be readily traced but occasionally

the origin of the vibration is very well hidden and difficult
to locate and correct.

Vibration is traceable to many causes. An out-of-
balance wheel will produce a pounding noise and its result is
readily apparent on the work surface.

have been abused or subjected to long service, they may

If the spindle bearings

wear

excessively and cause vibration.

An out-of-balance motor armature may cause a vibra

tion through the whole machine and it is for this reason that

Norton Company prefers to supply all motors for machines,



In

all cases, the armature is removed from the motor and is checked
for dynamic balance and is ba2anced dynamically if necessary
before being placed on the machine.

INFORMATION

35

i

If questions arise concerning the care, operation,
or possible adaptation of this NORTON Grinding Machine to other
uses, feel free to write to Norton Company at the home office,

Worcester, Massachusetts, U. S. A.

In making any such inquiry, however, please supply
as much information as possible. Give the serial number of the

machine, which will be found stamped on the base, together with

information concerning its purchase. It is important that we
also be informed whether additions in the form of special

attachments or mechanisms have been made to the machine since

the time it left ’

our factory.

In stating problems, please give all information
possible. This should include such data as the type of
material to be ground, the production desired, and the quan
tities required, as this latter point may have important



bearing on the sum which may be judiciously spent on additional
equipment, if such be necessary. In jobs which are unusual,
state the nature of the difficulty which you have encountered
or which may be anticipated.

part is send to us in order that we may use it in reaching a

Often it is helpful if a sample

decision.

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