Used 1955 HEALD 281 | GRINDERS, INTERNAL

                                                                                          281 HEALD INTERNAL CENTERLESS ROLL TYPE GRINDER

                                                                                                               S/N 35559        YEAR: 1955

STANDARD CATALOG SPECIFICATIONS
Maximum outside diameter of work............... 8"
Maximum length of hole that can be ground...... 4"
Minimum diameter of hole that can be ground.... 1/8"
Maximum included angle of taper
(Sizematic only)............................... 60 degrees
Center of wheel spindle from floor............. 47 1/2"
Regulating roll (std).......................... 10" dia.
(Can be ground down to 8 3/4" diameter)
Pressure & supporting rolls (std).............. 3" dia.
(Can be ground down to 2 1/2" diameter)

SPEEDS & FEEDS
Table speed, rapid traverse.................... 35 FPM
Table speed, for grinding...................... 0 - 20 FPM
Table travel................................... 10"
One turn of cross feed hand wheel.............. .060" on dia.
Wheel wear compensation........................ 0 - .004 on dia.
Maximum power cross feed....................... .042" on dia.

DRIVE
Main drive motor, 60 cycles a-c................ 2 HP, 1800 RPM
Wheel head motor, 60 cycles a-c................ 7 1/2 HP, 3600 RPM
Regulating roll motor w/speed reducer,
60 cycles a-c.................................. 1/2 HP, 3600 RPM
Coolant pump motor, 60 cycles a-c.............. 1/2 HP, 1800 RPM
Motors manufactured by Westinghouse w/Square D Electrics.
Hydraulic pump manufactured by Vickers.

GENERAL DATA
Capacity of oil tank.......................... 15 gallons
Length of width of base on floor.............. 66 1/4" x 28 1/8"
Floor space................................... 88" x 77"
Net weight of machine (approximate)........... 8,100 lbs.

EQUIPMENT & FEATURES
Sizematic feed box for controlling work size by maintaining a constant relationship between diamond and wheel contact.
Hydraulic dresser with diamond holder.
Table reversal dogs.
Centerless work head with all rolls.
Spark out timer.
All trip dogs.
Exit chute.

Specifications are deemed accurate, however, subject to verification or prior sale.