10" x 17.5" Cincinnati #R-57, universal cylindrical grinder, 5" H of centers, 16" x 2" x 5" grinding wheel, 3 kW, 1974

Cincinnati R-57 Universal Cylindrical Grinder, capacity of 17.5". Features include a max grinding length of 17.3", table speeds from 0.05 to 6 m/min, and a wheel speed of 33 m/sec.
R-57 CINCINNATI UNIVERSAL CYLINDRICAL GRINDER
S/N 27519 Year: 1974
STANDARD SPECIFICATIONS
Capacity
Maximum grinding length……………………………………..……. 17.3”
Maximum distance between centers……………………………..….. 17.5”
Height of centers…………………………………………………..…. 5”
Maximum swing diameter………………………………………….... 10
Maximum diameter machine will grind with full size wheel……..….6
Minimum diameter machine will grind with worn wheel………..…..0
Maximum weight of work between centers (without steady rest)..….55 lbs
Maximum weight of work held in chuck…………………………..... 33 lbs
Table
Table traverse speeds (infinitely variable)……………………….......0,05 to 6 m/min
Minimum movement necessary to reverse table…….………………. 4 to 5mm
Accuracy of table reversals at any one traverse rate /
at all traverse rates…………………………………………………… 0,02 mm/0,2 mm
Table tarry at both reversal points (infinitely variable)………………0 to 6 sec.
Hand wheel traverse per revolution (plane I / plane II)………………2,5/12,5 mm
Maximum swivel of table……………………………………………. ' 14 degrees
Head Stock
Speed range (infinitely variable)……………………………………….... 90 to690 RPM
Diameter of bore in spindle………………………………………………. 1.4
Center taper according to DIN228…………………………………. No. 13 Jarno
Head stock base…………………………………………………………… 0 to 90 degrees
Foot Stock
Center taper according to DIN228…………………………………. No. 8 Jarno
Quill retraction………………………………………………………. 1”
Grinding Wheel
Standard: R-57/58…………………………………………. 16” x 2” x 5”
Maximum wheel width: R-57/58…………………………. 2”
Wheel speed……………………………………………….. 33 min/sec
Wheel Head
Rapid advance stroke………………………………………………………. 2”
Manual infeed, one rev. of hand wheel on diameter…………………..……0.050”
Automatic infeed distance on diameter variable to approx.(on demand)…. 2 mm
Hand lever pick feed on diameter………………………………………….. 0-0001
Coolant Equipment
Tank capacity (separate tank)……………………………………….... 150 liters
Pump capacity…………………..……………………………………. 75 liters/min
Hydraulic Equipment
Tank capacity (separate tank)…………………………………..……. 75 liters
Pressure (two circuits)…………………………………………..……. 8 10 bar
Power Requirements
Wheel head motor: R-55/57……………………………………..…... 3 kW
Head stock……………………………………………………..…….. 0,37 kW
Hydraulic pump……………………………………………..…….…. 0,75 kW
Coolant pump……………………………………………..……….… 0,11 kW
Lubrication pump of wheel head………………………..…………... 0,09 kW
Internal grinding attachment: R-55/57/58……………..………….…. 0,75kW
Electrical Installation
Operating voltage………………………………………..…………… Control Voltage
380 V Three-Phase………………………………………..………….. 50 cycles 220V
220 V Three-Phase………………………………………..………….. 50 cycles 220V
400/440 Three-Phase………………………………………..……….. 50 cycles 110V
Auxiliary voltage
Voltage of magnetic valves…………………………………..……… 110 V AC
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.