Heald 271 TOOLROOM INTERNAL GRINDER

271 HEALD TOOLROOM INTERNAL GRINDER
Year: 1953


CAPACITIES
Swing over table (straight work on center line)........ 22"
Swing inside of standard coolant guard................. 12"
Maximum length of hole that can be ground.............. 8"
Maximum diameter of hole that can be ground............ 21 3/4"
Maximum included angle of taper........................ 60 degrees
Center of chuck spindle from floor..................... 45 1/2"
Workhead spindle flange (std).......................... 9 5/8"
Hole through workhead spindle.......................... 1 15/16"
Table travel........................................... 16"
Workhead cross slide travel:
Front.....................6\" Rear..................... 11 1/2"

SPEEDS & FEEDS
Table speeds for grinding unlimited between........ 0 - 18 FPM
Rapid traverse of table............................ 18 FPM
Workhead speeds - approximate................. 400-266-200-133 RPM
One turn of cross feed-handwheel.............. .050" on diameter
Roughing cross feed (adjustable).... .0001" - .0006" on diameter
Finishing cross feed (non-adjustable)......... .001" on diameter
One turn of workslide handwheel.................... 100"

DRIVE
Hydraulic pump motor, 60 cycles a-c........... 1 1/2HP, 1800 RPM
Workhead motor, 60 cycles a-c............ 1 1/2, 1 3/4, 1/2 HP
1800-1200-900-600 RPM

Wheelhead motor, 60 cycles a-c................ 5 HP, 3600 RPM
Coolant pump motor 60 cycles a-c.............. 1/2 HP, 1800 RPM

GENERAL DATA
Capacity of oil tank............................... 15 gallons
Capacity of standard coolant tank.................. 55 gallons
Length and width of base on floor............. 66 1/4" X 28 1/8"
Floor space: (total)
With or without coolant tank....................... 91" X 87"
Net weight of machine (approximate)................ 8,200 lbs.
Gross weight, crated (approximate)................. 9,100 lbs.

EQUIPMENT & FEATURES
Red Head spindle
Manual single point diamond dresser
Manual or power table
4 Speed work head
4 Position positive stop
Head stock jog