Heald 274 Universal Internal Grinder
CATALOG SPECIFICATIONS
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 15max.
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 cyclea-c………………….2 H.P. 1800 RPM
Work head motor,d-c……………………. 3/4 H.P. 1750 RPM
Wheel head motor, 60 cyclea-c…………… 5 H.P. 3600 RPM
Coolant pump motor, 60 cyclesa-c………… 1/2 H.P. 1800 RPM
GENERALDATA
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.
EQUIPMENT FEATURES
12″ Magnetic Chuck
Red Head Spindle
Cross sliding work head.
Swivel on work head.
All electrics controls.
Plain feed box.
Hand or hydraulic table traversing.
Face stop.
Single point dresser.
Attached electrical.
Variable speed work head.
