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.
![26" / 110" swing x 96" centers, Butler Newall CNC Gap Bed Strut Cylindrical Grinder, Model GB61, Fanuc Oi-MA, with Internal Spindle, Mfg 87, Serial Number GB4070 [G4790-G7930-9688]](https://centurymachinery.com/wp-content/uploads/2021/04/9688-9_butler-newall-cnc-gap-bed-strut-grinder_GB61_110-in-sw-in-gap-x-96-in-cc_sw-ways-26-in_fanuc-Oi-MA-ctl_internal-spdl_Serial-GB4070.jpg "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 - Century Machinery")
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