Heald 273A UNIVERSAL INTERNAL GRINDER

273A HEALD UNIVERSAL INTERNAL GRINDER
Year: 1963


STANDARD CATALOG SPECIFICATIONS
Maximum swing over table...................... 29"
Swing work head swiveled...................... 90 degrees 12"
Swing inside standard chuck guard............. 12"
Angular adjustment of work head............... 90 degrees
Work head cross slide travel.................. 17 1/2"
Maximum table travel.......................... 20"
Grinding stroke maximum....................... 16”
Wheel head cross slide travel................. 1 1/2"
Center of work head spindle to floor.......... 43 1/2"
Diameter of work head spindle flange.......... 9 5/8"

SPEEDS & FEEDS
Table speed for grinding...................... 0 18 FPM
Work head speeds Variable
Rapid traverse of table....................... 18 FPM
One turn of cross feed hand wheel............. .050 on dia.
Cross feed in increments: (adj.)
At 1 or both ends of table stroke........ .0001" .0005" on dia.
Minimum stroke................................ .125"
One turn of work slide hand wheel............. .100"
*One turn of table hand wheel................. 3 3/4"

DRIVE
Pump motor, 60 Cycles a c..................... 1 1/2 HP, 1800 RPM
Work head motor, 60 Cycles a c................ 1 1/2 HP, 1200 RPM
Wheel head motor, 60 Cycles a c............... 5 HP, 3600 RPM

GENERAL
Capacity of oil tank.......................... 11 gallons
Length & width of base on floor............... 73 3/4" x 37 7/8"
Net weight (approximately).................... 10,000 lbs.

EQUIPMENT & FEATURES
Cross sliding work head.
Facing attachment.
Vari speed work head.
Coolant pump & tank.
Radius dresser (additional cost).
Motor and controls data: 440 volt, 3 phase, 60 cycle.