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CATALOG
NO. 531-3
Page 2
a
type
cio
HYDRAULIC
CYLINDRICAL GRINDii
N-6880
Semiautomatic —
MATIC grinding cycle. Automatic feed functions
grinding.
Plain —
2
high production machine for traverse grinding operations.
features "ONE LEVER CONTROL
increase
Machine meets J.I.C. Hydraulic Standards with
Hydraulic Fluid Reservoir
Hydraulic Fluid Reservoir is available at extra cost.
” of AUTO-
output
in
plunge
inside base. An outside
Page 3
i
:
FOR EASY OPERATION
You grind small parts faster — to closer
limits of accuracy — and with fine finish —
with the NORTON 4" Type CTU Cylindrical
Grinder.
You profit from an advanced degree of
operating ease supplementing the high pro
ductive capacity. Reduced manual effort and
^^^Fatigue encourages higher operator efficiency.
You also get enduring precision and
i
dependability because of heavy proportions,
Automatic or manual work rotation control by
simple selector switch movement
Automatic or manual coolant flow control
Automatic in-feed at table reversals adjustable
from zero to .001" with automatic reset of the
wheel
Wide work speed range of 100 to 1000 r.p.m. by
knob control
!
Table start-stop lever controls work rotation and
coolant flow in addition to table movement, in
traverse grinding
Separate table dwell control for each end of
table travel
Preset truing and grinding table speed control
permits setting of these speeds at outset of a
given job — no continual resetting required
Graduated wheel feed handwheel with "click-
count" indexing mechanism gives ready indica
tion of amount of feed and simplifies indexing
for fine feed increments
smoothly operating sliding components, and
sturdy work supporting units.
FOR EASY MAINTENANCE
:
i
Outside mounting of all pumps and motors for
instant accessibility
:
Filters
for
hydraulic system and ways lubrication
system mounted outside for easy checking
i
Pressure relief valves for hydraulic and ways
lubrication
Ways lubricant flow control valves mounted at
end of
Hinged wheel guard cover eases wheel change
Ramped coolant tank outlet speeds tank clean
out
Electrical controls housed in elevated enclosure
for
stand-up inspection
systems conveniently placed
base for instant access
____
3
Page 4
with the semiautomatic . . a single manual f unction
TOUCHING ONE LEVER PRODUCES
THESE AUTOMATIC FUNCTIONS
M 'i
G
STOP I I
^
stop
r
STOP I 1
BiMiSj
V-l^ADVANCE
iMmM
i
1_*
TO STOP
DWELL
RAPID
RETARDED
advance
FEED
I
4
4
4
Wheel advances
Work
Coolant
Wheel
Wheel continues to advance
at grinding
Grinding
to predetermined
Dwell
and
finish
rotation
flow
advance
continues
period for
speed
starts
starts
retarded
rapidly
stop
size
Wheel retracts rapidly
Work
rotation
stops
4
Coolant shuts off
4
Page 5
I
p
automatic grinding cycle assures
Highest output in ‘ ‘
(
semiautomatic machines
The AUTOMATIC GRINDING CYCLE includes rapid
forward movement of the grinding wheel, a momentary
deceleration, an adjustable grinding feed, dwell for size
and finish, and rapid retraction of the wheel — all with
e>
»
out effort on the part of the operator.
The automatic cycle is governed by an electric timer pre
set for the particular time period necessary to produce the
accuracy of size and the finish desired.
RAPID FORWARD MOVEMENT AND WITHDRAWAL
of the grinding wheel occurs automatically through action
of a large piston moving in a hydraulic cylinder. The
amount of this rapid movement is adjustable both as to
length and rate.
plunge-grind ’’jobs
)
In rapid movement, the feed screw, half-nut, and the
wheel slide are moved as an integral unit with no relative
motion between these elements — and no wear.
AUTOMATIC GRINDING FEED occurs after the instan
taneous cushioning of the rapid advance of the grinding
wheel. The grinding feed is accomplished through auto
matic rotation of the large diameter feed screw in its half
nut by hydraulic means.
This rotating feed screw type of automatic grinding
feed results in extremely fine repetitive accuracy because
of metal-to-metal contact of screw and half-nut which are
lapped together and mated in process of manufacture. The
automatic grinding feed is also adjustable both as to length
and rate.
5
Page 6
designed for simplified operation
Automatic or manual
work rotation control
at the will of the operator
Work speed changes made
by simple knob control
Table start-stop lever
also controls work rotation
and coolant flow when
traverse grinding
Work jogging control is
by a button conveniently
mounted on the headstock
Coolant flow control
be automatic
at the will of the
or manual
operator
.-Eh
designed for stability
5SSS
HEADSTOCK
Wheel spindle reciproca
tion control lover (extra)
"One-Lever" control of
automatic grinding cycle
reduces manual effort*
Automatic feed of 0-.001"
at table reversals set by
simple knob control
Sturdy spindle and center assure strong work support
Center has carbide tip for durability
O Sealed spindle requires no lubrication attention
G All vee-belt drive assures smooth operation
O Variable work speed drive from A.C. power source pro
vides range covering full grinding capacity of machine
Belt tension easily adjusted
Cl
Hand table traverse
mechanism provides
smooth, effortless
table movement
Table reverse lever con
tacts dogs for automatic
reversal. Also used for
manual reversal
Right and left hand
table dwell separately
regulated by these
easily operated controls
Table speeds for truing
and for grinding are
preset by these controls.
Either speed is immediately
obtained thereafter by
simple lever movement —
continual resettings
avoided
Automatic grinding feed
rate set by quick acting
knob control having
cover which may be
locked*
"Click-Count" indexing
mechanism on wheel
feed handwheel provides
settings for .0001"
work diameter reduction
instantly and without
visual attention
FOOTSTOCK
Strong spindle is ground to close fit in footstock
Center has carbide tip for long service
Spring tension on center permits pressure to be regu
lated to suit work being ground
Spindle is guarded against infiltration of grit or foreign
matter
Lever control is standard
body
% •.
Hydraulic control arrangement is available
TABLES
Slanted swivel table provides best drainage for coolant
— an ideal clamping surface for table
N-6880
Graduated wheel feed
handwheel readily
indicates amount of
feed as wheel is
rotated past a fixed
pointer
stronger cross-section
of
table
Swivel table pivots at center of sliding table for taper
grinding
equipment and a
1
Power feed pressure relief
lever to
permit manual sizing
Selector for Plain
or Semiautomatic
operation*
"All controls for speeds and feeds are on front of machine"
6
*These controls are on Semiautomatic Machines only
w
Strongly proportioned sliding table moves smoothly on
pressure-lubricated, flat and vee ways
scraping
Hand
surface and creates minute
cant retention properties
Large bearing
— less wear, and sustained
of flat and vee ways assures
oil pockets for superior lubri
area of ways results in low unit pressure
alignment
fine bearing
7
Page 7
<
■ -
JL- •
HYDRAULIC
smooth sliding components
TABLE
TRAVERSE
O Smooth hydraulic table traverse assists achievement of finest fin
ishes in traverse grinding
: : .
enduring
i ■ ■
precision
»
O Hydraulic table traverse speeds are infinitely variable from 2"
per minute for fine truing, to 240" for rapid stock removal
O Propelling
O Elimination of compression stroke avoids piston rod buckling
O Table cylinder quickly "bled
headstock end of base
HAND TABLE DRIVE
O Hand drive of table by smoothly operating antifriction bearing
construction mechanism
O Large hand
operating position
O Automatic disengagement of table traverse hand wheel when
using hydraulic power — automatic engagement when hydraulic
power not being used
piston rod always in tension
” by valves accessibly mounted on
wheel mounted for convenient operation from normal
You get
finest
finish —
closest
accuracy
or
heaviest
roughing cuts
because of
these features
\
WHEEL SPINDLE UNIT
O
Wheel spindle is exceptionally rigid and wear resistant
o
Extra
long, hard bronze bearings
x 4%" — provide a superior bearing surface for spindle
° Bearings enclose practically the entire circumference of
spindle
° Bearings support over 50% of spindle body
® Bearings force-feed flooded by filtered lubricant with
instant
on front of spindle housing
O
Permanent alignment of spindle
° Long bearing surfaces assure low' unit pressure under
heavy loads
inspection of lubricant flow through sight-glasses
— 2ys
assured by bearing design
" x 4%" and 2ys
N-6083
"
WHEEL SLIDE UNIT
o Unit is heavily proportioned and self-contained
G Unit moves on film of filtered lubricant on widely separated vec
O Deep vee-way eliminates side thrust
o Uniform distribution of weight on ways assures smooth action
O Hand scraping of ways provides fine bearing and minute oil
pockets in ways for superior lubricant retention properties
© Bearing surfaces well protected
and flat-way
WHEEL FEED MECHANISM
m
£
superior
feeding
action
° Wheel feed mechanism combines unique hydraulic and
mechanical features for finest feeding action
O Feed wheel at your hand — no reaching
O Automatic feed accomplished by "revolving the feed
screw
” — micrometer-fine accuracy obtained by the metal-
to-metal
© "Click-count
tings corresponding to 0.0001" work diameter reduction
instantly, without visual attention
contact afforded by this method
” indexing mechanism permits positive set
9
Page 8
designed for easy maintenance [
!
Hinged wheel guard cover
eases wheel change
Ramped coolant tank outlet
simplifies clean out
Electrical controls housed
in elevated enclosure for
convenience in inspection
Spindle oil filter and
flow control valves are
positioned for easy
access
I
!
Pressure relief valves
for hydraulic and
ways lubricating
systems are mounted
outside of base
Ways lubricant flow is
easily regulated by
valves mounted
in an instantly accessible
Ways lubricant reservoir
is easily filled
N-6882
Large oil level sight glass
in both hydraulic oil
and ways lubricant reservoirs
gives continual indication
of supply
Filters for hydraulic and
ways lubricating systems
are outside of
base for easy access
V
"Guards removed to show details."
0
Page 9
PLAIN MACHINE PRICE INCLUDES
GENERAL
Headstock, dead center type, including No. 6
Jarno, carbide tipped, center (%"
Footstock, lever type, including No. 6 Jarno, carbide
tipped, center (%" dia.)
Wheel guard, 16" x 2" (for straight side wheel)
Wheel sleeve, balancing type, for 8" hole
%-2" face, straight
Diamond toolholder, table type, without diamond
1 Work drive dog — U/j" capacity
2 Grinding Wheels 16" x 1" x 8" straight side
Hydraulic table traverse
Single speed hand table traverse with interlock
Swivel table
Adjustable table dwell control
Automatic force feed lubrication to table and wheel
slide ways
Automatic, adjustable in-feed at each table reversal, also
automatically resets index to original position
Pre-set truing and grinding table speed control
Automatic wheel spindle lubrication
Table type base way covers
Hand grinding wheel feed
side wheel
dia.)
ELECTRICAL EQUIPMENT
Work drive —
speed, D.C. motor, totally enclosed, ball bearing, with
jogging relay, operated from A.C. power circuit
Wheel drive 3 H.P., 1800 R.P.M., A.C. motor, totally
enclosed, ball bearing with control
Hydraulic
and lubricating pump drive motor, totally enclosed,
ball bearing, with control
Coolant pump drive — y
motor, totally enclosed, ball bearing with control
Motors included in price are 50 or 60 cycle, with con
trols for any voltage up to 600 volts except where
specifically noted D.C.
Motor
speeds given are for
be 1500 and 1000 R.P.M.
% H.P., 115-1150 R.P.M. adjustable
pump drive —
1 H.P., 1200 R.P.M., A.C., oil
4 H.P., 1800 R.P.M., A.C.
60 cycle, 50 cycle speeds will
WIRING AND CONTROLS
110 volt control circuit
Elevated electrical control enclosure
Disconnect interlocked with door of control enclosure
All starters of magnetic across-the-line type
Complete coolant system with automatic control
Automatic work start and stop
Wrenches and Protection guards
SEMIAUTOMATIC MACHINE PRICE INCLUDES
The Semiautomatic Machine price includes all of the equipment listed above,
and in addition, includes: Automatic Grinding Cycle with Electric Timer control
Wiring in accordance with J.I.C. Standards which also
satisfy Machine Tool Electrical Code
Due to the interrelationships in the function of these machines, it is
necessary that we supply all electrical equipment. Entire machine operates
from
A.C.
power — no D.C. necessary.
11
Page 10
—
-I
,
MACHINE SPECIFICATIONS
Maximum Swing
Maximum diameter ground with 16" wheel — 4"
Wheel to Work Center distances
Maximum
Minimum
Grinding Wheels; Standard—16" x 1" x 8"
straight side
Wheel Guard—16" x 2" for straight side wheels
Wheel Sleeve — For 8" hole, %" to 2" face,
straight side wheels
Steadyrest — Capacity — 2"
Headstock—Dead center type
Center %" diameter — No. 6 Jarno Taper
1
I
1
:
i
'
Work speeds
Footstock
Lever type with spring tension control
Center % " diameter — No. 6 Jarno Taper
Table Traverse
Number of speeds —
Table speed range —
Swivel Table
Swivel table graduated —
degrees included angle
— 100 to 1000 R.P.M.
Infinite
2"
to
240" per minute
4ii"
11"
5 y4"
21°
Swivel table graduated —
taper per foot
Base Ways
Width of flat
Width of vee-way (projected)
Wheel Slide Ways
Width of flat way
Width of vee-way (projected)
Wheel Spindle
Large Bearing (L.H.)
Small Bearing (R.H.)
Spindle Speeds
Lubrication automatic flood
Reciprocation (
Oil Reservoir Capacity
Standard inside Hydraulic Reservoir—20 gals.
Outside Hydraulic Reservoir (extra)—30 gals.
Ways Lubricant Reservoir
Coolant Tank Capacity
Floor Space
Total projected length
Total projected width
Net Weight
Net weight including motors,
pounds
way
— 1620 and 1890 R.P.M.
when supplied
41/2"
1 5
/a "
1 5
/a "
2 Va "
2y4"
2 5
/s " x 4 3/4 "
2 % " x 4 % "
) 0"-% "
1-1/3 gals.
31 gals.
18"
88 Vi"
75"
4900
i
CYLINDRICAL GRINDING
UNIVERSAL TOOL AND CUTTER GRINDING
SPECIALIZED GRINDING
CRANKSHAFT LAPPING
VALVE GRINDING
Printed in United States of America
DISTRIBUTORS IN ALL PRINCIPAL CITIES THROUGHOUT THE WORLD
The descriptions, illustrations, and specifications appearing in this catalog are correct at the time
of printing. Machines built at later dates may differ in details due to the policy of NORTON
COMPANY to constantly improve their machines.
NORTON MACHINES
SURFACE GRINDING
CRANKPIN AND CRANKSHAFT BEARING GRINDING
CAM AND SHAPE GRINDING
ROLL GRINDING
ATTACHMENTS AND EQUIPMENT FOR SPECIAL WORK
•
CYLINDRICAL AND FLAT LAPPING
UNIVERSAL MULTIPURPOSE GRINDING
CAMSHAFT GRINDING
•
SPECIAL AIRCRAFT PRODUCTION GRINDING
:
Form 531-3P-3500-5-55-AB
NORTON
COMPANY
WORCESTER 6, MASS
CABLE
ADDRECC.
1 /
• /
NORREMH
U.S.A.
/ /
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