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Rockwell Vertical Mill
Variable rate power table feed mod. 21-820.
Downfeed
Model 21-100 with variable rate power table feed mod. 21-820.
110V electricals and a 1/2 HP single speed 1,725 RPM NEMA C-frame 56 motor with and special shaft length of 4-3/32" (5/8" bore). This gives a range of spindle speeds from 370 to a whooping 6300 RPM, by changing a single v-belt.
It lacks the two side belt guards (p/n 21-813) and all the original name plates and placards. The paint, drum switch and lights are not originals.
Spindle taper R8 (without locating pin) with a 7/16" hole through spindle. Mounted on five bearings and sliding on six splines.
The table three 7/16" t-slots and has a working surface of 6-1/2 x 24". The table travels 16" (longitudinal) x 6-3/4" (cross) x 16-1/2" vertical. Spindle nose to table goes from 0" to 16-1/2" and spindle center line to column v-ways is 2-5/8" to 11-1/4".
The quill is a massive 3" with 2-1/2" of travel, with a choice of fine or rapid travel and brake.
The base is a handy cabinet-type and has an access door in the LHS with a wooden base. It is full to the brim with accessories!
The mill weights around 780 lb (including motor) and the power table feed adds another 28 pounds
Height (including motor) 73-1/2"
Front-to-rear 33-3/4"
Width 37-3/4"