Ditch Witch RT120 - Manual (Page 205)

Specifications - 204
RT120 Operator’s Manual
H911 Trencher
Operation U.S. Metric
Headshaft speeds
Ratio low 220 rpm 220 rpm
Ratio standard 270 rpm 270 rpm
Ratio high (not recommended) 362 rpm 362 rpm
Digging chain speeds
Ratio low 628 ft/min 191 m/min
Ratio standard 767 ft/min 234 m/min
Ratio high (not recommended) 1032 ft/min 315 m/min