Heald 275

275 HEALD EXTENDED BRIDGE INTERNAL GRINDER
Year: 1954

STANDARD CATALOG SPECIFICATIONS
Swing over swivel plate, diameter............. 18", 30" diam.
Hole length, maximum.......................... 14", 17 3/4"
Hole diameter, maximum........................ 9 3/4"
Hole diameter, minimum........................ 1/8"
Taper (included angle) bridge swivel.......... 30 degrees
Taper (included angle) workhead swivel........ 60 degrees
Center of workhead spindle from floor......... 49 1/2"
Table travel.................................. 16"
Wheelhead cross slide swivel to rear.......... 4 degrees

SPEEDS & FEEDS
Table speed, rapid traverse.................. 35 FPM
Table speed, grinding........................ 0 to 20 FPM
Workhead speeds (4).......................... 570, 875, 1150, 1750
One turn of cross feed handwheel............. .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 handwheel.................. .963"

DRIVE
Hydraulic pump motor..................... 2 HP, 1800 RPM
Workhead motor........................... 1 1/2‑1‑3/4‑1/2 HP
440 Volts................................ 570, 875, 1150, 1750 RPM
Wheelhead 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
17,000 RPM Red Head spindle
72" Extended bridge
4 Point barrel stop
All trip dogs
Coolant tank & pump
Hydraulic cross feed for rapid advance
Manual dresser
12 1/2" 3 Jaw manual chuck
10" Diameter 3 roller steady rest
Government surplus