These sheaves are perfect for science projects and experiments. They
have a diameter of 50 mm and come in a pack of five.
This compound machine was designed and built using five of the sheaves.
It demonstrates the lifting power of these home made pulleys. Pulleys are
often used as parts of compound machines such as this one. They function as
helper machines, easing the lifting power. In fact, a pulley system can cut the
force necessary to lift a very heavy object in two, four, etc., depending on the
designed system. With these pulleys you can study and measure the force and
distance trade off with compound machines. These pulleys are good for science
experiments as well as functional tasks.
Your order consists of five replacement sheaves, the material necessary to
construct the pictured design is not included.