and Flat Belt Design Engineering Data
V-belt drives permit large speed ratios and provide long life. They are
easily installed and removed, quiet, and low maintenance.
Initial Selection adn Design COnsideration V-Belt Application
- How much power do you need to transmit and at what speed?
- Service Factor V-Belts your particular application.
- Determine the V-Belt design horsepower.
- Based on your results, determine which belt section would be appropriate for your drive - See V-belt supplier. Narrow belt sheaves are more compact than Classical belt sheaves. Some belts are more
appropriate for specific applications.
- Determine the ratio of your drive application based on the Ratio formula - center distance has been pre-selected
based on the drive size.
- Find the number of belts required by dividing the design horsepower by the belt/HP.
- Verify the validity of this drive by consulting the number of grooves available in these sheave sizes.
- Verify if dynamic balancing is needed for each sheave based on the Dynamic or Two-Plane Balancing formula .
V-belts will slip and creep, V-belts should not be used where synchronous speeds are requires.
Sizes - See
V Belt Sizes for more.
Industrial V-belts are made in two types: heavy -duty (conventional, narrow), and light duty. Conventional belts are available in A, B, C, D and E sections. Narrow belts are made in 3V, 5V, and 8V sections. Light-duty belts come in 2L, 3L, 4L, and 5L sections. Open-end belting is available in A, B, C, D, and E sections, and in some sizes for low-horsepower.
Agricultural belts are made in the same sections as conventional belts however, they are designated HA, HB, HC, HD, and HE: in double-V sections HAA, HBB, HCC, and HDD.
Automotive belts are made in six SAE-designated cross sections identified by the nominal top widths .38, .50, .69, .75, .88, and 1.00 in. (10, 12, 17, 19,
22, and 25 mm).
V-belts can be manufactured in any length within a fairly wide range.