Two, double tandem plastic pulleys can be combined to form a double fixed/double moveable block and tackle pulley system. These pulleys have sheaves with deep V-grooves with diameters of 50 and 40 mm.

Pulleys are often used as parts of compound machines. 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.

The picture shows a block and tackle design using twisted mason twine (100% Nylon) along with a weight, both of which are not included.

Old product code: 2PULLEY54