26″ / 110″ swing x 96″ centers Butler Newall Model GB61 CNC Gap Bed Strut Cylindrical Grinder with Internal Spindle and Fanuc Oi-MA Control, Serial Number GB4070, Inventory Reference G7930-G4790-19688-A

26″ / 110″ swing x 96″ centers Butler Newall Model GB61 CNC Gap Bed Strut Cylindrical Grinder, Inventory Reference G7930-G4790-19688-A

Model Number: GB61

Serial Number: GB4070

Reference No: G7930-G4790-19688-A

Condition: used

Mfg Date:

Model Number GB61

Serial Number GB4070

Reference Number G7930-G4790-19688-A

Description

BUTLER NEWALL CNC GAP BED STRUT CYLINDRICAL GRINDER  
       Model GB61, Serial Number GB4070, Mfg. 1987
       Retrofitted with Fanuc Oi-MA
SPECIFICATIONS
CAPACITY
  Swing over Table, (Maximum workpiece over table)  26"  (660.4mm) Diameter 
  Swing in Gap  110" (2,844.8m) Diameter
  Distance between Centers  96" (2,438.4mm)
GRINDING STROKE 70"  (1,778mm)
GAP WIDTH ADJUSTMENT by movement on rack,  CTS Gap Closed  60"  (1,524mm)
  Width of Gap Open, (including 5" intrusion of way cover into gap) 44-1/2" (1,130.3mm
SWIVEL TABLE with Sony DRO to read Taper adjustment
GRINDING WHEELHEAD:
  Grinding Wheel Spindle Speed, Infinitely Variable thru 2-Speed Ranges
  4000 SFPM  1020 rpm – 30” (762mm) diameter wheel.   
  1530 rpm – 20” (508mm) diameter wheel.
  8000 SFPM    510 rpm – 30” 762mm) diameter wheel.
  165 rpm – 20” (508mm) diameter wheel.
GRINDING WHEEL: 30" diameter x 3" face x 12" hole
                                     (762mm x 76.2mm x 304.8mm)
WHEELHEAD CARRIAGE TRAVERSE: Grinding Rate, INFINITE, 
  Total Adjustment  18" (457.2mm)
   Minimum movement of carriage for auto reversal 1/4" 6.35mm)
   Range of Grinding Rate 1" – 120"/minute,
            Carriage Dwell Adjustment 1 – 20 seconds.
HEADSTOCK: Live and Dead Centers.
            Headstock Pedestal has Swivel Base, 
            Angles Towards and Away from 
   Wheelhead.  Adjustments longitudinally on rack 14”,
   Headstock and Footstock center taper No. 16 Jarno   
     Number of work rotation speeds, Infinite with-in Work.
            Speed Ranges, Low 8 – 28 rpm.  High 28 to 100 rpm.
TAILSTOCK  with Pressure Setting Low and High
            Stroke 3" (76.2mm)
TRAVERSE: Feed (Minimum) .022" Reverse (0.559mm)
                     Rapid (Maximum) 1.14" (2.96mm) Reverse
INFEED ADJUSTMENTS:
  Wheelhead Movement Hand and Auto Infeed at Table Reversal.
  Total Adjustment ………18" (457.2mm) 
CNC CONTROLS:  FANUC Oi-MA    Retrofitted 2002
  CRT.   Programming Key Board.
  Feed Rate Adjustment Dial.        Emergency Stop Button.
  Wheel Speed Indicator.               Work Amp and Load Meters.
  Work Speed RPM Meter.            GE Adjustable Speed Drive.
   Leeson Wheel 40 H.P. AC Inverter.
  Sony 3 Axis Measuring System.
  McLean Air Conditioner for Control Enclosure.
       HOFMANN HYDROKOMPENSER Model 5000
       (Wheel Balancing System) with Measuring & Control Syste
MOTOR DRIVES: wired 480 volts, 3-phase
  Wheelhead 40 hp. (29.42kw) 1800 RPM. A.C
  Headstock, (Work Spindle) 7.5 hp.5.52kw) 1750 RPM. AC & 5 H.P DC
  Carriage Drive  AC Servo
  Hydraulic Pump  3 hp. (2.2kw) 1800 RPM
  Internal Spindle 5 hp, (3.7kw) 3600 RPM
  Polycoln Coolant System (three) ¼ H.P., 1.5 H.P. and 5 H.P.
EQUIPPED WITH:
  (1) Internal Spindle Attachment with 15½" (393.7mm) nose.
  (1) Grinding Wheel Hub.
  (2) Steady Rests.
  (2) Work Stage Rests.
  (1) Radius Stone Dressing Attachment.
  (2) Live Centers.
  (2) Dead Centers.
  (1) Wheel Balancer
  Trabon Automatic Ways Lubrication.
  Work Area Enclosure.   Splash Guards.
  (1) Operators Steel Work Stage.
  (1) Polycoln Liquid Coolant Recovery System, Model W85-400D6
             with Slug Conveyor & Hydro Minder.
  (1) Hofmann Hydrokompenser  Wheel Balancing System.
COMPLETE FACTORY SAFETY GUARDS
Dimensions Grinder 243" L-R x 144" F-B x 114" Ht. 
          (6,172.2mm L-R x 3,657.6mm F-B x 2,8956.6mm Ht.)
Approx. Weight 59,600 lbs.