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The SMT-TM-06 experimental unit illustrates the equilibrium conditions on a differential
pulley block. The relation between pulley diameter, lifting force and torque is demonstrated.
Three pulleys with different diameters are mounted on a shaft, which is itself mounted on
ball bearings. Weights can be hung on the cables. The forces act on the one hand directly on
the periphery of the pulley with the largest diameter and another force acts on the pulley
with the smaller diameter via a loose roller. Using weights, it is possible to vary these forces
until equilibrium is reached.