Heald 273A UNIVERSAL INTERNAL GRINDER

273A HEALD UNIVERSAL INTERNAL GRINDER
Year: 1970


STANDARD CATALOG SPECIFICATIONS
Maximum swing over table...................... 22"
Swing work head swiveled...................... 90 degrees 13"
Swing inside standard chuck guard............. 21"
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.
Vari speed work head.
Single point manual dresser.
Face stop.
Attached electrical panel.
12” Extended base.
Coolant tank & pump.
Manual or power table.
Redhead spindle.
2 Axis Sony DRO.
Forward & reversing workhead.
2” Riser on workhead.