220-8 RK CINCINNATI CENTERLESS GRINDER

220-8 RKCINCINNATICENTERLESS GRINDER
S/N 9163A0194-0019 Year: 1994

STANDARD SPECIFICATIONS

WORK CAPACITY
Maximum work piece diameter…………………………..…….. 4.5
Minimum work piece diameter……………………………….. 0.060

GRINDING WHEEL
Maximum new wheel diameter……………………………….. 24
Minimum worn wheel diameter……………………….………. 17
Maximum wheel width………………………………………….….. 10
Wheel mounting hole diameter……………………………….. 12

GRINDING WHEEL CAPACITY
Surface speed…………………………………………………. 8500 ft/min. @ 1352 RPM
(Maximum diameter wheel)
Optional surface speed……………………………………….. 6500 ft/min @1034 RPM
(Maximum diameter wheel)

GRINDING WHEEL DRIVE MOTOR
256T Frame – 1800 RPM……………………………………. 20 HP
Drive belts……………………………………………………. 3V850

GRINDING WHEEL DRESSER
Traverse dive motor (Servo)……………………………………….. 1.2 N-m
Worm gear reducer ratio………………………………………….………… 10:1
Traverse rate (across wheel)………………………………….. 1 to 50 IPM
Traverse rate (across wheel)...…………….. 25, 4 to 1270 mm/min.
Maximum traverse distance (across wheel)………….…………. 12.28
Maximum profile depth…………………………………………………………….. 1
Diamond holder – single point type………………………… 0.437Shank
Blade type diamond holder………………………………………… Optional
Hydraulic rotary cutter...…………………………………………… Optional
Auto diamond compensator...……………………………………… 0.0005Division
Optional electric solenoid comp…………………………………….0.0005Resolution
Maximum compensation w/electric solenoid………………………. 0.0015

REGULATING WHEEL
Maximum new wheel diameter…………………………………….. 14
Minimum worn wheel diameter……………………………………. 11
Mounting hold diameter……………………………………………. 6
Maximum width (without cobore)….………………………………. 8
Maximum width (with cobore)…………………………………….. 10
Maximum RPM (during dressing)…………………………………. 300 RPM
Minimum RPM…………………………………………………….. 0 RPM
Surface speed………………………………………………………. 0 to 1100 ft/min.
Surface speed………………………………………………………. 0 to 335, 4 m/min.
Drive motor (Servo)……………………………………………….. 14 N-m
Drive ratio………………………….………………………………. 8.333:1

REGULATING WHEEL DRESSER
Traverse drive motor (Servo)…………………………………………. 1.2 N-m
Worm gear reducer ratio……………………………………………… 10:1
Traverse rate (across wheel)…………….…………………………….. 0 to 50 IPM
Traverse rate (across wheel)……………….………………………….. 0 to 1270mm/min.
Maximum traverse distance…………………………………………... 11.02
Maximum profile depth………………………………………………. .63
Diamond holder – single point….…………………………………….. 0.437ShankDia.
Diamond compensator
Auto advance dial……………….……………………………………. 0.0005Division
Electric solenoid (optional)……….…….…………………………….. 0.0005
Dresser swivel……………………….……………………………….. 8� to -2�

SINGLE AXIS SLIDE DRIVE
Re-circulating ball screw……………………………………………. 10 mm Pitch
Compensator resolution……………………………………………... 0.000004
Positioning rate (maximum)…………...……………………………. 125 min.

INFEED
Rapid advance/retract rate…………………………………………. 125 min.
Number of feed rates………………………………………………………………… 3
Maximum feed rate (rough rate)…………………………………….. 1 min.
Minimum feed rate (rough rate)…………………………………… .001min.
Maximum feed rate (medium rate)………………………………….. 1 min.
Minimum feed rate (medium rate)……………………………….. .001min.
Maximum feed rate (fine rate)……………………………………...... .1min.
Minimum feed rate (fine rate)……………………………………… .0001min.

SWIVEL PLATE
Swivel to front (measured to adjustor)……………………………….. 0.50
Swivel to rear (measured to adjustor)………………………………… 0.50

LOWER SLIDE
Maximum travel……………………………………………………… 9.05
Slide clamps (2)…………………………………………………… Manual

UPPER SLIDE
Maximum travel……………………………………………………… 5.27
Slide clamps (2)……………………………………………………… Manual

HYDRAULIC SYSTEM
Reservoir capacity…………………………………………………………….……… 20 gal.
Oil specification……………………………………………………………………… CM P-38
Viscosity (S.U.S. @ 100- F)………………………………………………. 149 to 182
ISO viscosity grade……………………………………………………………. ISO VG 32
Military spec. equivalent.………………………………… MIL-H-46001A Type 1
Pump capacity…………………………………………………………….. 4.3 gal per min.
Pump motor…………………………………………………………... 1.5 HP – 1800 RPM
Frame…………………………………………………….. 145TC, Nema C Face Mount
Pressure filter…………………………………………….. Throw-Away Type Element
Bypass pressure…………………………………………………………………....…… 50 PSI
Schroeder replacement element…………………………………………...……… 8TS3
Main system pressure………………………………………………………..…..… 250 PSI

LUBRICATION SYSTEM
Reservoir capacity……………………………………………………………………….. .5 gal.
Oil specification…………………………………………………………………………. CM P-47
Viscosity (S.S.U. @ 100- F)…………………………………………………. 317 to 389
ISO viscosity grade…………………………………………..…………………… ISO VG 68
Military specification equivalent…….……….. MIL-L-46017 Type 1Medium
System pressure………………………………………………………………………... 150 PSI
Lubrication cycle frequency…………………………… 15 seconds every 4 hours
System type – positive displacement
Distributor points – grinding wheel dresser, regulating wheel dresser

Lubrication oil is also supplied at a constant pressure to the regulating wheel spindle bearings and drive unit by the hydraulic power unit.

Lubrication cycle frequency and points lubricated may vary due to optional/special equipment supplied.

CUTTING FLUID SYSTEM
Standard system…………….…………………………………… Hydrant and Sewer
Optional system…………………….………………………………….. Pump and Tank
Tank capacity………………………………………………………………………... 150 gal.
Pump capacity (flow)………………………………………………... 40 gal. per min.

MACHINE WEIGHT
220-8 Centerless Grinder…………………………………….. 22,102 lbs.

UNIT WEIGHTS(All weights are approximate)
Base………………………………………………………….… 7,280 lbs.
Wheel head…………………………………………………. 1,575 lbs.
Upper slide…………………………………………………….. 875 lbs.
Lower slide…………………………………………………….. 1,038 lbs.
Swivel plate……………………………………………………. 1,780 lbs.
Regulating wheel housing…………………………………. 627 lbs.
Regulating wheel drive unit w/o motor….………… 158 lbs.
Regulating wheel drive motor………………………….. 128 lbs.
Regulating wheel truing assembly…….……………… 900 lbs.
Regulating wheel housing w/motor………………….. 975 lbs.

UNIT WEIGHTS(All weights are approximate) (continued)
Wheel guard……………………………………………………… 440 lbs.
Wheel guard door……….…………………………………… 130 lbs.
Single axis slide drive w/ball screw…….…………… 640 lbs.
Hydraulic tank assy. (empty)…………………………… 565 lbs.
Drive box w/o motor…………………………………….….. 158 lbs.
Drive box motor…………………………………………..……. 128 lbs.

EQUIPPED WITH
10” Thru feed work rest.
20 HP Spindle motor.
Grinding wheel dresser indramat servos on diamond advance traverse.
Regulating wheel dresser indramat servo for traverse, hand diamond advance

Specifications are deemed accurate, however, subject to verification or prior sale.
All exchange units/returns must be shipped within 30 days. All exchange units/returns must be shipped using DDP terms -Grinders Clearing House, Inc. dba GCH Machinery, is not responsible for any customs formalities or shipping costs.

If Grinders Clearing House, Inc. dba GCH Machinery does not receive exchange/core unit back within 30 days, GCH will invoice FULL replacement cost (OUTRIGHT Cost) to customer.