Heald 275

275 HEALD EXTENDED BRIDGE INTERNAL GRINDER


STANDARD CATALOG SPECIFICATIONS
Swing over swivel plate, diameter............ 16" dia.
Swing over bed............................... 26"
Swing inside guard........................... 14"
Hole length, maximum......................... 5""
Hole diameter, maximum....................... 5 1/2"
Hole diameter, minimum....................... 1/8"
Taper (included angle) bridge swivel......... 30 degrees
Taper (included angle) work head swivel...... 60 degrees
Center of work head spindle from floor....... 49 1/2"
Table travel................................. 16"
Wheel head cross slide swivel to rear........ 4 degrees

SPEEDS & FEEDS
Table speed, rapid traverse.................. 35 FPM
Table speed, grinding........................ 0 to 20 FPM
Work head speeds (4)................... 570, 875, 1150, 1750
One turn of cross feed hand wheel...... .050", .060" on dia.
Wheel wear compensation, manual.............. 0 to .004"
Power cross feed....................... .038", .042" on dia.
Roughing feed, adjustment.............. .0001" to .0005"
Finishing feed, nonadjustable................ .0001 on dia.
One turn of table hand wheel................. .963"

DRIVE
Hydraulic pump motor..................... 2 HP, 1800 RPM
Work head motor.......................... 1 1/2 1 3/4 1/2 HP
440 Volts.......................... 570, 875, 1150, 1750 RPM
Wheel head motor......................... 5 HP, 3600 RPM
Coolant pump motor....................... 1/2 HP, 1800 RPM

GENERAL DATA
Capacity of oil tank.......................... 15 gallons
Capacity of coolant tank...................... 55 gallons
Length & width of base on floor............... 105" x 36"
128" x 36"
Floor space with or without coolant tank...... 126" x 74"
149" x 74"
Net weight of machine......................... 10500 lb.
Gross weight of machine....................... 12000 lb.

EQUIPMENT & FEATURES
72" Extended bridge.
All trip dogs.
Face stop.
Jump slide.
Single point dresser.
Attached electrical.