Tin, copper and antimony

Tin, Phosphorous and copper

Copper, zinc and lead

Aluminium, lead and zinc

Sometimes provide clearance and sometimes interference

Provide transition from clearance to interference along the axis of shaft

Provides clearance in one end and interference in other end

Provides always clearance

increase arc of contact

increase belt tension

Decrease slackness

All of the above

is always positive

is always negative

is always zero

May be positive, negative or zero

Progressive plug gauge

Taper ring gauge

Thread ring gauge

Snap gauge