The instrument used for scribing lines parallel to the edge of the work and for finding the centre of cylindrical work is known as

Hermaphrodite calliper

Spring calliper

inside calliper

transfer calliper

clearance angle

rake angle

cutting angle

forging angle

Chain drive are not compact

Chain drives withstand heat dirt and weather exposure when properly lubricated

Cannot absorb shocks

Not useful for low speed and high load transmission

Quick return mechanisms is used

Rack and Pinion mechanism

Screw thread mechanism

Oldham's mechanism

flexible

strong

Rurt proof

Leak proof