Heald 274 UNIVERSAL INTERNAL GRINDER

274 HEALD UNIVERSAL INTERNAL GRINDER
Year: 1954

CAPACITIES
Swing over table ....................................... 30" dia.
Workhead parallel to table on center
Swing over workhead slide‑head at 90 degrees ........... 20" dia.
Swing inside of standard chuck guard.................... 18" dia.
Angular adjustment of workhead (max.).................. 90 degrees

Travel workhead cross slide
....................... front 6" max.
....................... rear 15" max.

Maximum length of hole that can be ground............... 14"
Maximum diameter hole that can be ground................ 21 3/4"
Total table travel...................................... 30 1/4"
Maximum thickness of work and fixture with workhead swiveled
using 3" grinding wheel................................. 15"
Center of chuck spindle from floor...................... 48"
Diameter of workhead spindle flange..................... 9 5/8"
Distance from face of spindle flange to swivel point
under workhead ......................................... 4 1/8"

SPEEDS & FEEDS
Workhead speeds unlimited between...................... 40‑350 rpm
Table speeds for grinding unlimited between............ 0‑15 fpm
Rapid traverse of table ............................... 35 fpm
One turn of cross feed handwheel....................... .050"dia.
Roughing cross feed‑adjustable
......................... .0001"dia.
......................... .0006"dia.

Finishing cross feed ‑ non‑adjustable ............. .0001" dia.
One turn of workslide handwheel........................ .0100"

DRIVE
Pump motor, 60 cycle a‑c...................... 2 H.P. 1800 rpm
Workhead motor, d‑c .......................... 3/4 H.P. 1750 rpm
Wheelhead motor, 60 cycle a‑c ................ 5 H.P. 3600 rpm
Coolant pump motor, 60 cycles a‑c ............ 1/2 H.P. 1800 rpm

GENERAL DATA
Capacity of oil tank.................................... 15 gal
Capacity of coolant tank................................ 55 gal
Length and width of base on floor............. 78 1/4" x 28 1/8"
Floor space (total)........................... 123" x 101"
Weight of machine (approx.)............................ 8850 lbs.
Gross weight crated (approx.).......................... 10650 lbs.
Gross weight boxed (approx.)........................... 11000 lbs.

EQUIPMENT & FEATURES
Cross sliding workhead
Will supply Heald red head spindle
Cam lock spindle workhead
Swivel on workhead
All electrics & controls
Plain feedbox
Hand or hydraulic table traversing