Idler gear

Change gear

Translating gear

Compound gear

In an eccentric shaft, the centres of the individual diameters are displayed

Eccentric shaft can be turned by holding it in a three-jaw chuck

Higher speed is chosen for eccentric turning

It is preferred to give more depth of cut in the beginning while turning an eccentric shaft

Thread chasing dial is used to catch the thread when threading on lathe

Worm gear of chasing dial engages with the lead screw while thread chasing

Thread chasing dial is an additional part of the lathe carriage

Thread chasing dial stops rotating when the half nut lever is engaged

only at one particular position

only at numbered or un-numbered division

at opposite position

anywhere

Chaser is a single point cutting tool

Cutting threads by a chaser is slower process than that by a single point tool

Cutting threads by chaser gives better finish

The same chaser can be used for cutting any pitch of thread irrespective of the type of chaser used