Precision Variable Speed Pulleys

Precision Variable Speed (VPSR) Pulleys Pulley Dimensions ** Click on Desired Variable Speed Pulley for Detailed Technical Information* Model A B C1 Open C2 Closed D Dia. Standard Bores 5/8 3/4 14mm 19mm VPSR-43 4-1/4 25/32 1 1/2 4-1/4 • • • • Non-Standard Bore sizes, both Inch and Metric are available upon request at no extra charge.  Please contact us.

Speed range is variable within standard ratio limits.  Standard ratio is 2.8:1.  All of our variable speed pulleys are spring-loaded and color-coded to indicate spring pressure - easy to identify and use.

Standard bore sizes are 5/8 to 3/4 and 14mm to 19mm for the VPSR pulleys. These pulleys combine strength and cost savings of a steel hub and mounting shaft; the pulley flanges are a combination of glass-reinforced nylon and steel pulley face.

Designed for belt sizes 1/2" V and horsepower ratings up to 3/4 HP.  They are engineered to offer an economical alternative for many applications that may not require the expense of AC/DC variable speed motors.

Torque Transmission Precision Variable Speed Pulleys

• Economical
• Lightweight
• Strong
• Quiet
• Infinite speed range - within pulley ratio limits
• Close tolerance on round shaft

Contact us with your specific Variable Speed Pulley requirements >>

Standard size, detailed dimensions and spring pressures are listed below.