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
