26″ / 110″ swing x 96″ centers Butler Newall GB61 CNC Gap Bed Strut Cylindrical Grinder with Fanuc Oi-MA – Internal Spindle – Wheel Balancing System, Serial Number GB4070, Inentory Reference G4790-G7930-9688

Model Number: GB61

Serial Number: GB4070

Reference No: Gap Bed Strut Cylindrical Grinder & G4790-G7930-9688

Condition: used Very Good

Mfg Date:

Model Number GB61

Serial Number GB4070

Reference Number Gap Bed Strut Cylindrical Grinder & G4790-G7930-9688

Description

BUTLER NEWALL CNC GAP BED STRUT CYLINDRICAL GRINDER  
   Model GB61,    Serial Number GB4070,
   Mfg. 1987 retrofitted with Fanuc Oi-MA
   Condition: In running order, prior to being taken out of service 1-2008
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,
    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 & 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 System.
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) 1/4 hp., 1.5 hp. & 5 hp.
EQUIPPED WITH:
   Internal Spindle Attachment with 15½" (393.7mm) nose.
   (1) Hofmann Hydrokompenser Wheel Balancing System.
   (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.
COMPLETE FACTORY SAFETY GUARDS
Dimensions Grinder 243" L-R x 144" F-B x 114" Height                       
       (6,172.2mm L-R x 3,657.6mm F-B x 2,8956.6mm Ht.) 
 Approximate Weight 59,600 lbs.