it helps in forming of chips

it decreases the vibration and noise

it increases tool life and surface finish

it prevents forming of built up edge

Have maximum negative allowance and sufficient amount of force required for the assembly

Lies somewhat between clearance and interference fit

It is used in the assembly where the parts are not to be disassembled for life

Used for high speed of rotation

0.6

0.7

0.8

0.9

enable the pulley rigidly fixed to the shaft

avoid slipping of belt from pulley

make the pleasant appearance of pulley

make the drive more sturdy

fed by gravity feed

force feed with the help of pump

throwing away of lubricant by the crank to other parts of engine

supplied by wick