Velocity ratio for chain drive is lesser than that for belts.
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Fabric rubber belts are not widely used as they can’t be operated at high speeds.
Power transmitting capacity of V belts is more than that of flat belt.
The optimum velocity of the belt for maximum transmission is given by √P/6m.
Creep is the slight absolute motion of the belt as it passes over the pulley.
In horizontal belt, the loose side is generally kept on the bottom.
The law of belting states that the centreline of the belt when it approaches a pulley must not lie in the midplane of the pulley.
It is possible to use the belting reverse direction without violating the law of belting.
A shorter centre distance is always preferred in belt drives.
If velocity ratio is less than 3, then centre distance is given by D+.5d.
If velocity ratio is more than 3, then centre distance is given by 2D.
Is it possible to reduce the centre distance as much as we want?
The diameter of the shorter pulley in leather belt drive is 265mm. It is rotating at 1440 rpm. Calculate the velocity of the belt.