... adopts double crank mechanism .2) The length of ram storke can be adjusted by power .The machine operates ... cutting tool and workpieseMax.Slotting Length of ram630mmNumber of ram strokes(per min)8,12,20,30r.p. ... longitudinal travelof table700mmRange of table longitudinal and transverse feeds ram storke0.10,0.20,0.32,0.54, ... 1.30mm/perRang of table rotary feed deg per ram storke3`,6`,9`36``,16`12``,24`,39` ...