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

35 degree to 45 degree

45 degree to 55 degree

20 degree to 30 degree

15 degree to 20 degree