Heald 273A EXTENDED BASE UNIVERSAL INTERNAL GRINDER

273A HEALD EXTENDED BASE UNIVERSAL INTERNAL GRINDER
Year: 1970

STANDARD CATALOG SPECIFICATIONS
Maximum swing Over table...................... 29"
Swing workhead swiveled....................... 90 degrees ‑ 12"
Swing inside standard chuck guard............. 12"
Angular adjustment of workhead................ 90 degrees
Workhead cross slide travel................... 11 1/2" Rear
4" Front
Maximum table travel.......................... 20"
Wheelhead cross slide travel.................. 1 1/2"
Center of workhead spindle to floor........... 43 1/2"
Diameter of workhead spindle flange........... 9 5/8"
SPEEDS & FEEDS
Table speed for grinding...................... 0‑18 FPM
Workhead speeds‑ Variable
Rapid traverse of table....................... 18 FPM
One turn of cross feed handwheel.............. .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 workslide handwheel............... .100"
*One turn of table handwheel.................. 3 3/4"
DRIVE
Pump motor, 60 Cycles a‑c..................... 1 1/2 HP, 1800 RPM
Workhead motor, 60 Cycles a‑c. 1 1/2 HP, 1200 RPM variable 0 - 500
Wheelhead 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).................... 6,200 lbs.
EQUIPMENT & FEATURES
Cross sliding work head
Auto motor feed
Single point dresser
Vari‑speed work head
Coolant pump & tank
12" Extended base
Motor and controls data: 440 volt, 3 phase, 60 cycle
Cam lock work head