Cincinnati R-57

R-57 CINCINNATI PLAIN CYLINDRICAL GRINDER
Year: 1973


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 5 mm
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 to 690 RPM
Diameter of bore in spindle………………………………………………. 1.4
Center taper according to DIN 228…………………………………. No. 13 Jarno
Head stock base…………………………………………………………… 0 to 90 degrees

Foot Stock
Center taper according to DIN 228…………………………………. 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
Swivel: R-57……………………………………………………………….. ± 45 degrees
(lower only)
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……………..………….…. 0,75 kW

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