Heald 271

271 HEALD SIZEMATIC BORE & FACE INTERNAL GRINDER

Swing over table diameter (straight work).............. 22"
Swing inside standard guard............................ 15 1/2"
Maximum length of hole................................. 5"
Maximum diameter of hole............................... 5 1/2"
Minimum diameter of hole............................... 1/8"
Maximum included angle (size matic only)............... 60 degrees
Center of chuck spindle from floor..................... 43 1/2"
Diameter of work head spindle flange................... 9 5/8"
Table travel........................................... 16"
Capacity of oil tank................................... 15 gallons
Capacity of coolant tank............................... 55 gallons

SPEEDS & FEEDS
Table speed, rapid traverse............................ 35 FPM
Table Speed, grinding.................................. 0 20 FPM
Work head speeds.......................... 400, 266, 200, 133 RPM
One turn of cross feed hand wheel......... .060 on dia.
Wheel wear compensation on diameter.................... 0 to .004
Maximum power cross feed.................. .042 on dia.

DRIVE
Work head motor, standard voltages, 60 Cycles a c, infinite variable speed.
Oil pump motor............................ 2 HP, 1800 RPM
Wheel head motor.......................... 5 HP, 3600 RPM
Coolant pump motor........................ 1/2 HP, 1800 RPM

GENERAL DATA
Floor space with or without coolant tank............... 93" x 85"
Weight of machine, net, approximate.................... 7,400 lbs.
Gross weight, crated, approximate...................... 8,400 lbs.
Gross weight, boxed, approximate....................... 9,500 lbs.

EQUIPMENT & FEATURES
Electric single point diamond dresser.
Spark out timers.
4 Speed work head.
Flange style work head.
Hydraulic cross sliding work head.
Face stop.
Face feed.
Skip dress control.
Push button station.