English to Russian Tech/Engineering Mechanics / Mech Engineering has adopted three pin clutch mechanism

Drilling-milling function-turning function change over knob: to control the direction of motor power whether it is toward lathe spindle or toward drill-mill spindle. While pull out this knob,the motion is driven to the lathe spindle so as to undertake cutting function; while push this knob in, the motion is driven to drill-mill spindle so as to undertake drilling milling function. Notice that this knob has adopted **three pin clutch mechanism**, when pulling out or pushing in this knob, the knob or pulley must be rotated a little to make three pins align the pin holes, so that the function of clutch can be performed.