HEALD 261 Rotary Surface Grinder USA #6955

HEALD 261 Rotary Surface Grinder USA #6955
Reference #6955
Model # 261
Serial # 33875
Year of manufacture- 1954’ / Rebuilt 5/1969’
Chuck diameter- 16-7/8”
Chuck life- ½”
Max swing inside guards- 18-1/2”
Standard wheel size- 14” x 1” W x 5” Bore
Max distance from chuck surface to wheel center- 17-3/4”
Min distance from chuck surface to wheel center- 4-1/4”
Max height under new wheel – 10-1/2”
Table slide travel- 12”
Table grinding stroke- 8”
Table tilt “Convex”- 17°
Table tile “Concave”- 10°
Table speeds- 0 – 12’ F.P.M.
Table speeds for run-out- 35’ F.P.M.
Chuck speeds- 50 – 225 R.P.M.
Chuck feeds- 0 – 20 F.P.M.
Downfeed- 0.0001” - .0006”