Eisco's 4-step metal pulley differential is ideal for classroom demonstrations of mechanical advantage. The inner-gap on each pulley is 4.75mm; while the pulley diameters are 20mm - 30mm - 40mm - 60mm. This durable metal unit has a painted black and blue finish, and is mounted on a 4 by 3/8th inch rod.
Eisco's 4-step metal pulley differential is ideal for classroom demonstrations of mechanical advantage. The inner-gap on each pulley is 4.75mm; while the pulley diameters are 20mm - 30mm - 40mm - 60mm. This durable metal unit has a painted black and blue finish, and is mounted on a 4 by 3/8th inch rod.