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Roller: A normal pulley has a slot for a belt, chain or cable. A reel is a wider pulley frequently employed in cable techniques, allowing the cable to be wound around many times the diameter of the reel.
In a compound pulley program, there is equally a movable pulley and a fastened pulley. This means that not only does the load “feel” lighter, but you can also modify the route of the power. Whilst this sort of configuration can go hefty hundreds quite effortlessly, it arrives at the price of demanding very a bit of movement to do the job.

OEM