Cincinnati 420 E.C. PLAIN PLUNGE GRINDER

10” X 18” CINCINNATI 420 E.C. PLAIN PLUNGE GRINDER
Year: 1979

Work Piece Capacity
Nominal work piece diameter.............................................. 10”
Actual swing diameter over table......................................... 10.93”
Nominal work piece length................................................. 18”
Actual work piece length.................................................... 20”
Maximum Work Piece Weight

Spring type foot stock......................................................... 150 lbs.
Head stock chuck and work piece extended 6” maximum
from spindle nose.............................................................. 100 lbs.
Wheel Head

Grinding wheel dia. (new).................................................... 30”
Grinding wheel dia. (worn) 0 machines.............................. 16”
Collet hole dia.................................................................... 12”
Grinding wheel width.......................................................... 0.5” to 3.0”
Grinding wheel speed, surface............................................. 6500 ft.min.
Motor................................................................................ 20 HP
Sliding Table
Max. work piece length....................................................... 20”
Total table traverse in./rev. of hex wrench...........................1”
Table traverse, in./rev. of hand wheel................................. 0.200”
Total table travel................................................................ 28”
Swivel Table
Nominal work piece length................................................ 18”
Max. swivel counterclockwise............................................ 11
Max. swivel clockwise....................................................... 3
Taper (max. on dia.)......................................................... 4.67” per foot
Head Stock
Work piece center............................................................ No. 10 Jarno
Head stock spindle, Rpm std, A.C. mtr............................. 126, 199, 315, 500
Motor – A.C..................................................................... 0.75 HP
Motor – D.C..................................................................... 1.0 HP
Spindle nose (opt.) live..................................................... Type A-1 size 5
Foot Stock
Work piece center............................................................. No. 10 Jarno
Center movement – lever and screw type............................ 1.5”
Center movement – hydraulic type..................................... 1.5”

EQUIPMENT & FEATURES
Acramatic, electronic command, infeed control
Behind wheel diamond rotary truing with compensation
Auto balancing grinding wheel spindle
Free standing, separate electrical panel