Heald 276

276 HEALD 72" EXTENDED BRIDGE INTERNAL GRINDER
Year: 1980


CAPACITIES
Swing over swivel plate....................... 16" dia.
Hole length................................... 12" max.
Hole diameter (Maximum)....................... 8 1/2", 5 1/2"
Hole diameter (Minimum)....................... 1/8"
Taper (included angle) Bridge swivel........ 30 degrees
.............................................. 17 degrees
Taper (included angle) Work head swivel..... 60 degrees
Center of work head spindle from floor........ 48"
Work head spindle flange...................... 9 5/8"
Table travel.................................. 30 1/4"
Wheel head cross slide swivel to rear......... 4 degrees

SPEEDS & FEEDS
Table speed, rapid traverse................... 30 FPM
Table speed, grinding......................... 0 20 FPM
Work head speeds.............................. 400/266/200/133
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 cross feed (adjustable).............. .0001" to .0005"
Finishing cross feed (non adjustable)......... .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 1/4 HP
......................................... 1800, 1200, 900, 600 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.......... 117" x 36" x 140" x 36"
Weight of machine (net, approx.)......... 11,000 lbs.

EQUIPMENT & FEATURES
Red Head grinding spindle.
3 Roller steady rest.
Single point diamond dresser.
Coolant pump & tank.
4 Speed work head.
10” 3 point steady rest.
12” 3 point steady rest.
Coolant tank & pump.
Trip dogs.
Allen Bradley controls.
Servo motor & ball screw for cross slide.
Front mounted guards.
Attached electrical.
Standard wheel flange (6 Bolt Pattern)
440 Volts.