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NORTON
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14" AND 16"
TYPE
”
C
”
ROLL GRINDERS
NORTON
GRINDING MACHINES
CATALOG 1165-5
4
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:
,
NORTON
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ROLL
m
■
mechanical power table traverse.
These modern, heavy and rugged roll grinders meet every requirement for machines
to grind rolls of medium size, especially hardened steel rolls for the finest quality cold roll-
mg processes.
for accuracy and duplication of contour with the high luster or mirror finish necessary in
the production of flat wire, strip stock, or foil, to the most exacting requirements.
The roll grinders differ from standard plain 14" and 16" type C machines principally
in the grinding wheel unit and the machine equipment. A much heavier wheel slide and
larger wheel spindle are used. The upper portion of the wheel slide is pivoted on the lower
for the application of a roll forming mechanism. Other roll grinding equipment includes
a headstock drive plate designed to equalize the pressure of the driving studs on the roll
and journal rests.
All machines for roll grinding and equipped with the roll forming device are built with
GRINDING
14"
Concaved
MACHINES
AND
or
convexed rolls can be ground within extremely close limits
16"
TYPE
C
I
«'• #> «> * e m &
16" X 90" TYPE C ROLL GRINDER WITH SWIVEL TABLE
(WORK DRIVER NOT SHOWN)
N-5173
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DRIVE
Direct motor drive arrangement only is provided. Four motors are required. One
drives the grinding wheel spindle, a second drives the work and a third the table traverse,
the lubricating oil pump and the coolant pump, and the fourth the wheel spindle lubricat
ing pump.
BASE
As in all Norton machines, the base construction is an important feature. Not only
is the base casting massive, but the weight is correctly distributed to assure permanent
alignment and freedom from vibration. A stiff cross section is obtained by thick walls and
heavy ribs throughout. Large ways, one flat and one vee, lubricated by a force feed system,
are provided for the sliding table.
• The 48" length machine has a base resting on three points; longer machines must have
a foundation and adjustable wedges are provided for maintaining alignment. Both coolant
and oil tanks are integral with the base.
TABLES
Like the base, the tables are stiffly ribbed and proportioned to support without dis
tortion the heavy work for which the machine is intended. The sliding table ways are
force feed lubricated and protected from damage and dirt by heavy gauge steel teles
coping guards.
S
ingle
T
ables
swinging flanges or projections if needed. A gap filler block permits the use of the table
are standard equipment and may be obtained with a gap for
when desired as though no gap existed. Tapered work cannot be ground in single table
machines, but a lateral adjustment in the footstock permits alignment of the work to grind
straight.
D
ouble
table. Double tables can be furnished on machines up to 168" length if required and per
mit the grinding of tapered work. Vernier type
T
ables
consist of a lower or sliding table which supports the upper or swivel
swivel adjustment scale provided.
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:
HEADSTOCK
The headstock is driven by vee belts from
adjustable speed direct current motor
an
mounted directly on the headstock. Either
dead center or live spindle types of headstocks
.
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N-5173
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are available. Power is transmitted to the work drive plate by means of vee belts, suitable
adjustment being provided for maintaining proper tension.
Work center is hardened tool steel two inches in diameter and may be lubricated with
work in place.
veniently located. The headstock is firmly clamped to the table by two bolts in a manner
to insure alignment and prevent distortion.
Stopping and starting is electrically controlled by a push button station con
FOOTSTOCK
The standard footstock is of the screw and hand-wheel type. A very large diameter
center maintains alignment of the work and this may also be lubricated with work in place.
Footstocks for single tables have a crosswise adjustment for grinding work straight. The
clamping arrangement is the same as for the headstock.
WHEEL FEED AND RAPID WHEEL HEAD TRAVERSE
A
hand operated grinding wheel feed which indexes to tenths of thousandths
inch on diameters is provided on all machines. The feed operates through a large diameter
feed screw and half nut which are mated and lapped together in manufacture. Automatic
feed at each reversal of the sliding table is also provided.
of an
For fast travel of the wheel head a power traverse mechanism is used. The wheel
feed screw is revolved rapidly by power, thus moving the wheel slide quickly toward or
away from the work. A cam which can be quickly set by the operator causes the power
mechanism to be disengaged when the wheel has moved to
During the backward traverse the slide is automatically stopped when it reaches its rear
most position.
a position just clearing the work.
TABLE TRAVERSE
Power table traverse is by means of a rack attached to the under side of the sliding
table, a pinion operated through a gear reduction and a reversing mechanism in the front
of the machine. A hand wheel for manual operation is provided.
The reversing mechanism consists of a clutch which engages first one and then the
other of two bevel pinions constantly in mesh with a bevel gear. The clutch and pinions
are made of alloy steel, and the bevel ring gear is a steel forging. The clutch teeth
hardened, and the entire mechanism runs in an oil bath, thus providing smooth and quiet
operation.
Power for driving the table traverse is through a speed change mechanism comprising
a cone pulley and a gear box with the gears running in oil. The drive is by a flat belt from
an anti-friction backshaft, and changes in speed are easily made
wheel or table.
without stopping the work,
are
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f
SPINDLE LUBRICATING PUMP
UNIT. LUBRICANT MUST
TO BEARINGS BEFORE SPINDLE
CAN START.
GRINDING
FLOW
WHEEL
UNIT
The grinding wheel unit is completely self-contained. The great weight of the assem
bled slide and the large spindle supported in long bearings which can be closely adjusted are
responsible to a large degree for the superior quality of finish obtainable.
W
heel head
vide adequate support for the wheel spindle, which is of considerably larger dimensions,
larger bearings than the
W
heel spindle
—
Wheel heads for roll grinders are of exceptionally heavy design to pro
spindle used in plain
—
The wheel spindle is made from carefully selected and heat treated
cylindrical grinders of
corresponding
capacity.
with
alloy steel. It is very large in diameter and runs in extremely long bearings widely sepa
rated. Each end of the spindle has a tapered nose. The grinding wheel on its balancing
flanges or sleeve is mounted on one end and the vee belt sheave for the drive from the motor
on the other end. Changes in spindle speed are made electrically by use of an adjustable
speed motor with rheostat. When a constant speed motor must be used, belt sheaves
are
easily changed for speed variations, and belt tension readjusted. A safety device prevents
over-speeding of the
grinding
wheel by the use of the wrong spindle sheave pulley.
i
W
heel spindle bearings
—
Spindle bearings are of characteristic Norton design
proved by many years of service. The bearing boxes of hard bronze are ground on the
outside to fit hand scraped taper holes in cases pressed into housings in the wheel slide.
Spanner nuts on each end provide adjustment to compensate for wear by drawing the split
boxes into the tapered cases.
End thrust is taken at the center of the spindle by a large yoke firmly bolted to the
wheel slide casting.
spindle
with spanner nut adjustment. The thrust is thus distributed over a very large area.
On either side of the yoke are hard steel thrust collars on the wheel
A separate motor driven unit provides lubricant under pressure to the spindle and
thrust bearings.
drive motor control.
The control for the lubricant pump motor is interlocked with the spindle
It is impossible to start or operate the wheel drive motor unless the
lubricating pump motor is running and lubricant is circulating through the spindle bear
ings, the flow being visible through glass windows in the wheel slide.
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N-3050
D
rive
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on the wheel slide. The motor rests on a sliding base for the convenient adjustment of belt
tension.
THE ROLL FORMING MECHANISM
The principle used for crowning or concaving rolls is the movement of the grinding
wheel contact point away from or toward the axis of the roll as the roll is traversed past
The wheel spindle drive is through multiple vee belts from a motor mounted
No idlers are employed on this drive.
the wheel face. This movement of the grinding wheel is derived from a tilting motion
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of the wheel head.
The wheel head pivots on two horizontal trunnions at the front of the wheel slide,
:
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directly below and parallel with the wheel spindle. Pivoting is caused by a forming cam at
the rear of the wheel slide rotating while in contact with a roller on the upper or tilting
member of the wheel slide, which raises and lowers the rear of the wheel head as the cam
revolves.
Rotation of the cam is timed with and operated by the movement of the sliding table
i
through a worm and worm wheel, a set of change gears and a pinion in mesh with the
.045
MAX
GRINDING
TRAVEL.
WHEElr^
FULCRUM
ST
It
ADJUSTABLE ROU.
GRADUATIONS FOR DIVIDING 20
CROWN IN TENTHS
G4T-CIRCUMFERENCE OF-^
PITCH OIA-E5.I3
t
#
THIS CHART SHOWS THE INCREASE OR DECREASE IN DIA AT CENTER OF ROLL FACE AS
X
H o
O 2 U
S t u
IQ
24 .0007
30
36
42
48
A.- 50 TEETH B - 102 TEETH
CAM ROTATES
I
.000b
.0004
.0015
.00//
.0023
.0032
.0016
.0043
.0021
.0055
0027
t
.0012.
.0022
.0034 .0046
.0048 .0064
.0064
.0062
3
170* WHILE TABLE TRAVELS 46'
4
.0017
.0030
.0066
.0110
G
5
.0021
.
0025 0030
.0037
.0045 .0052
0057 .006
.0081
.0097 .0113
.0106
.0/29 .0151
.0137
.0165
C- 35 TEETH
7
9 .0060
.0192
GEARING DIAGRAM
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OH 5
.0162 1
.0216
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OBTAINED BY
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CONVEXING OR CONCAVING
6
3
.0034 .003b
.0060 .0067
.0032.0103
.0/45
.0129
.0172 .0194
.0220 .0247
^LOW POINT- GRINDING WHEEL ATMIDDLE OP ROLL FACE CONVEX CROWN
^ HIGH
^
CAM
^^CHANGECEAR
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A*
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['Or
TABLE RACK
CONCAVE
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CHANGE GEAR AND SETTING INDICATOR AT POINTS FROM I TO »
A - IOE TEETH B' 50 TEETH
CAM ROTATES 3
£
3
.0024 .0037
.0059
.0068 .01 IQ
.0096
.0147
.0213
OV WHILE TABLE TRAVELS 20*
5
4
.0043 .0062 .0074
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.0196 .0245 .0234.0343 0392
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C» 35 TEETH
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0066.0099 .OHI
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N-3068
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sliding table rack. Automatic and positive backlash eliminators assure accuracy of form
and exact repetition of contour for each pass of the roll and for duplication of rolls.
Traverse motion of the sliding table causes the cam to revolve and to produce a vertical
movement of the cam roller. The cam roller is mounted on a rocker arm which is pivoted
and which has an adjustable roller fulcrum, the position of which is indicated by a gradu
ated scale on the wheel slide. By changing the position of the fulcrum, the effect of the
cam can be varied from zero to maximum for any given gear combination.
The type of form on the roll is governed by the contour of the forming cam.
The amount of curvature for various lengths of rolls depends on the movement of the
wheel head produced by rotation of the cam. This is regulated by changing the position of
the fulcrum. In many cases this adjustment is sufficient to cover the range of work. If
not, an additional range can be secured by changing the gear combination in the drive
which revolves the cam.
Straight face rolls cam be ground either by removing the roller from contact with the
cam by means of a simple jack screw or by setting the fulcrum so that no motion of the
wheel head is produced when the cam rotates.
JOURNAL RESTS
Journal rests are of the two bearing type, the upper shoe holder of which can be moved
to suit various diameters. Each set of shoes has an adjustment permitting changes for
different diameters within a limited range. Shoes have babbitt liners each of which is
independently adjustable and are automatically lubricated.
EQUALIZER DRIVE
The work drive plate on the headstock is so mounted that it can pivot on an axis
perpendicular to the roll axis. Drive studs in this plate are thereby equalized in their
pressure against the flutes in the roll ends and no “
pods
” or “
wabbler drive
” is required
and no reduction in the length capacity of the machine as is the case where these are neces
sary. An additional feature is that end thrust
of
the
rolls can be taken by the work centers
although the roll is supported by and revolves in journal rests.
MOTORS
electrical
Since publication of this catalog, certain items of Electrical Equipment have been
included in the Machine price. Formal quotations provide detailed information.
“ A'
closed frames are to be used, it will be necessary for customer to send certified dimension
sheets for checking to be sure no interference would prohibit their use.
Where no direct current
is available for adjustable speed headstock motors, generators
may be used and mounted on the machine.
otors to
;e stated
vvith en
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STANDARD EQUIPMENT
Standard equipment includes:
1 Headstock, dead center type, motor drive, without motor
1 Footstock, screw operated spindle, with lateral adjustment
1 Wheel Guard, 30" x 4", including coolant pipes
1 Wheel Sleeve, balancing type for 12" hole, 3-4" face wheels
2
Grinding Wheels, up to 3" face or one wheel over 3" face, diameter same as
wheel guard
1 Roll Forming Device, fulcrumed wheel head type
1 Diamond Tool Holder, footstock type, without diamond
1 Mirror Attachment
)
Set Telescoping Base Way Covers
1 Levelling Block for erecting and checking machine alignment
1 Pair Journal Rests including shoes and liners for 2" diameter variation
1 Equalizer Drive on headstock
1 Set Foundation Plates and Levelling wedges for 72" and longer machines
Wrenches, Motor Pulleys, Water and Protection Guards and Table Lifting Straps.
N-4002
DETAIL—REAR VIEW OF WHEEL
HEAD SHOWING ROLL FORMING
CAM. CAM ROLLER AND CHANGE
GEARS. COVER REMOVED
>
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SPECIFICATIONS
LlJ
CAPACITY
Diameters (nominal swing)
Maximum swing over table.. . 1^6'
Lengths between centers,
nominal.
Distances between wheel and ^
work centers
Maximum
Minimum
Grinding Wheels
Standard diameter and
width
Maximum diameter, allow
able width
Maximum width, allowable
diameter
Weights on Centers allowable.
Journal Rests
Maximum diameter accom
modated .............................
Range adjustment of each
pair shoes
Coolant Tank
Capacity,
Gap Table Machines:
Maximum diameter swing
in gap
Standard gap lengths----
Swivel Table Machines
Tables swivel for the following tapers given
in inches on diameter per foot of length
Machine. . .48" 72" 96" 120" .144" 168"
Taper.
Note: These figures do not represent the greatest taper per
foot that can be ground. Tapers depend on the wheel diam
eter, work
with reference to the pivot point. Drawings of tapered work
to be ground should be submitted in all cases.
diameter
..
.48", 72", 96", 120"^144" and 168"
.
.................................
........................
..........................
U. S.
Gallons.
(Tapers cannot be ground)
*lA" 1«" 1*" W
and lengths, and the location of the taper
...
l35'
<
23Q"
10"
O
Z
30" x 3" 30" x 3"
42" x 5" 42" x 5"
30" x 10" 30" x
6500 lbs. 6590 lbs.
m"
2"
... 50
13", 19", 25" and 31"
22"
16"
16"
7
16M"
23^"
10"
’
10"
12"
3"
50
24"
IK"
HEADSTOCK
Spindle diameter
Center diameter.
Length of bearing on table, lg?^"
Weight without motor,
pounds
Minimum work speed ob
tainable with
450/1800 r.p.m. motor
500/2000 r.p.m. motor. . .21 r.p.m. 18 r.p.m.
600/2400 r.p.m. motor. . .25^*.p.m. 21 r.p.m.
850/2550 r.p.m. motor. . .36 r.p.m. 30 r.p.m.
FOOTSTOCK
Spindle diameter
Center diameter
Length of bearing on table. . .
Weight, pounds
WHEEL SLIDE
Length of bearing ways
Projected area of ways, sq. in.
Overall width of ways
Weight complete with wheel
guard, wheel and sleeve,
oiling system, but without
motor, pounds
Lubrication of ways
BASE WAYS
Width of ways for sliding table
(each)
Overall width of ways
Lubrication of ways
...............................
......................................
:
......................
.......................
.........................
..........
.............
.......................
.................
.............
.................
M"
mi"
<
tfipo
uJ
O
Z
... 19^.
3 W
2"
14^"
225
36"
186
251%"
4600
3H"
16H"
p.
m.
16 r.p.m.
14M"
36"
486
25%"
4600
Force feed
16^"
Force feed
16"
414"
2"
19H"
1050
3^"
2"
250
sy
2"
WHEEL
Material
Outside to outside of spindle bearings
Spindle Bearings, hard bronze, automatically lubricated. .
Spindle speeds, with adjustable speed motor
Spindle speeds, with constant speed motor, number of sheave pulley changes
Spindle
Spindle drive from motor
Sheave Pulleys, diameters
..............................................................................................
...........................................................
............................................................................
WHEEL
Diameter of
Minimum work diameter reduction provided
feed screw
........................................................................
in
SPINDLE
wheel feed
Large
FEED
index
bearing 53^" x 12"; small
..............................................................
English. 0.0001"; Metric, 0.0025 m/m
Heat treated alloy steel
....................................
bearing 5J4" x 12"
Depends on control used
1*X". 14*", 17"
...........7
36"
Vee belts
3^"
3
*
4
1
Page 10
TABLE
SPEEDS
Number of table speeds
Range of table speeds, inches per minute
................................
MOTORS
WHEEL DRIVE
20 h.p., 450/1800 r.p.m. Adjustable Speed D.C. with Rheostat and Magnetic Starter
or 20 to 30 h.p., 1200 r.p.m. Constant speed with Starter
WORK DRIVE
The following motors with dynamic braking, push button station, magnetic starter and speed change
rheostat, are suitable for mounting on the headstock:
2 h.p., 500/2000 r.p.m. adjustable speed
3 h.p., 500/2000 r.p.m. adjustable speed
5 h.p., 450/1800 r.p.m. adjustable speed
TABLE AND PUMP DRIVE
3 h.p., 1200 r.p.m. constant speed
SPINDLE LUBRICATING PUMP DRIVE
h.p., 1200 r.p.m. constant speed
12
6" to 92"
FLOOR SPACE
14" and 16" Type C Roll Grinding Machines
NOMINAL LENGTHS
Total projected lengths with telescoping base
guards
Width—total projected
NOMINAL LENGTHS
14" MACHINES
Net Weights
Domestic Shipping Weights
Export Shipping Weights
16" MACHINES
Net Weights
Domestic Shipping Weights
Export Shipping Weights
..........................................................................
SHIPPING SPECIFICATIONS
(Approximate)
...................................................................
.......................................
............................................
............................................
.......................................
............................................
.......................
19' 5"
20,000
23.000
25.000
21,000
24.000
26.000
48"
8' 5"
48"
72"
23' 9"
8' 5"
72"
23.000
25.000
28.000
24.000
26.000
29,000
120"
33' 3"
8' 5"
120"
27.000
30.000
32.000
28,000
31.000
34.000
96"
28' 11"
8' 5" 8' 5"
96"
25.000
28.000
30,000
26,000
29.000
31.000
144" 168"
37' 7" 41'
144"
30.000
33.000
36.000
31.000
34.000
37.000
33.000
36.000
40.000
34.000
37.000
41.000
11"
8' 5"
168"
14" AND 16" MACHINES
Boxed for Export, Contents of Cases (cu. ft.)
----
730
810
990
1,180
1,360
1,710
Page 11
★ ★
CYLINDRICAL GRINDING • SURFACE GRINDING • CYLINDRICAL AND FLAT LAPPING
UNIVERSAL TOOL AND CUTTER GRINDING • UNIVERSAL MULTIPURPOSE GRINDING
SPECIALIZED GRINDING • CRANKPIN AND CRANKSHAFT BEARING GRINDING
CRANKSHAFT LAPPING • CAM AND SHAPE GRINDING • CAMSHAFT GRINDING
CAMSHAFT LAPPING • ROLL GRINDING • CAR WHEEL GRINDING • AUTOPART REGRINDING
NORTON
MACHINES
ATTACHMENTS AND EQUIPMENT FOR SPECIAL WORK
NORTON COMPANY • WORCESTER, MASS., U. S. A.
Branch Offices: HARTFORD - NEW YORK - CLEVELAND - DETROIT - CHICAGO
Form 11G5-5P-1-47-1000
Cable Address: "Norco"
Printed in United States of America
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