Variable Speed Pulley (VPS) Engineering Specifications ** Click on Desired Variable Speed Pulley for Detailed Technical Information* |
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Model | Belt | Speed Ratio |
HP Rating @ 1800 RPM |
Approx. Pitch Dia. |
Weight |
|
VPS-15 | 3/8" V | Up to 2.45:1 | 1/4 | 1-3/8" Min 2-3/4" Max |
5 oz. | |
VPS-20 | 1/2" V | Up to 2.8:1 | 1/2 | 1-7/16" Min 3-1/2" Max |
8 oz. |
|
Variable Speed Pulley (VPS) Spring Pressures ** Click on Desired Variable Speed Pulley for Detailed Technical Information* |
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Model | Spring Strength | Color Code | LBS. COMPRESSION IN SPRING | |
As Pulley Starts
to Open |
Pulley
Fully Open |
|||
VPS-15 | Medium Heavy |
White Blue |
14 17-1/2 |
18-1/2 22 |
VPS-20 | Medium Heavy |
White Blue |
18 22 |
23 27-1/2 |
Variable Speed Pulleys are shipped with the blue, heavy strength spring unless another strength spring is requested.
Torque Transmission is an ISO Certified company.
Speed range is infinitely variable within standard ratio limits. All of our variable speed pulleys are color-coded to indicate spring pressure - easy to identify and use.
Standard bores range from 3/8" to 5/8" in hex shaft design. 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 from 3/8" V to 1/2" V and horsepower ratings up to 1/2 HP, they are engineered to offer an economical alternative for many applications that may not require the expense of AC/DC variable speed motors and drives.
Simple belt tensioning adjustments allows for speed changes from 2.45:1 up to 2.8:1.
Standard variable speed pulley sizes and types, dimensions and spring pressures are listed below.
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