Heald 274 UNIVERSAL INTERNAL GRINDER

274 HEALD UNIVERSAL INTERNAL GRINDER
Year: 1956

CAPACITIES
Swing over table .................................. 30" dia.
Work head parallel to table on center
Swing over work head slide head at 90 degrees ..... 20" dia.
Swing inside of standard chuck guard............... 18" dia.
Angular adjustment of work head (max.)............. 90 degrees
Travel work head 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 work head swiveled
using 3" grinding wheel............................ 15"
Center of chuck spindle from floor................. 48"
Diameter of work head spindle flange............... 9 5/8"
Distance from face of spindle flange to swivel point
under work head ................................... 4 1/8"

SPEEDS & FEEDS
Work head 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 hand wheel.................. .050" dia.
Roughing cross feed adjustable..................... .0001" dia.
..................... .0006" dia.
Finishing cross feed non adjustable ............. .0001" dia.
One turn of work slide hand wheel.................. .0100"

DRIVE
Pump motor, 60 cycle a c...................... 2 H.P. 1800 RPM
Work head motor, d c ......................... 3/4 H.P. 1750 RPM
Wheel head 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 work head.
Swivel on work head.
All electrics & controls.
Plain feedbox.
Hand or hydraulic table traversing.
Face stop.
Single point dresser.
Attached electrical.
Variable speed work head.
Flange style work head.
18” Swing inside guard.