1. V-Belt Basics

2. Means of Power Transmission
V-Belts
Chains
Gears
Timing Belts

3. V-Belts and V-Belt Drives
The function of a belt is to simply transfer rotation from the powered pulley to one or more driven pulleys. The belt must be designed and manufactured to transfer this torque efficiently and reliably.

4. V-Belts and V-Belt Drives
V-Belts have been around since the early 20th century

5. V-Belts and V-Belt Drives
V-Belts work using the principle of the ”wedge”

6. V-Belts and V-Belt Drives
V-Belts are available in thousands of sizes and configurations
Primary function is to transmit power from a primary source (motor) to a secondary “driven” unit

7. V-Belt Characteristics
Less expensive than other forms of power transmission
Start, stop and run smoothly
Operate noiselessly and without lubrication
Absorb objectionable and harmful vibrations
Clean and requires minimum maintenance
Rugged and long lasting
Provide a wide selection of speed ranges
Cover an extremely wide horsepower range
Easy to install and simple to replace
Relatively unaffected by moisture, abrasive dusts, or extreme variations in temperature

8. V-Belt Drive Terms

9. V-Belt Construction Tension Section Tensile Members
Compression Section

10. Types of Belts Classical or Multiple V-Belts
Fractional Horse-Power or Light Duty V-Belts
Narrow or Wedge Multiple V-Belts
Double Angle or Serpentine V-Belts
Banded Belts
V-Ribbed Belts
Variable Speed Belts
Trapezoidal Synchronous or Timing Belts
High Torque Synchronous belts
Specialty Type Belting

11. Two Major Belt Categories
V-Belt - works on the principle of the wedge and relies on tension to create friction on the sidewall of the sheave to transmit power
Synchronous or timing belt - relies on accurate and smooth meshing of the teeth on the belt with the grooves of the sprocket

12. Two Major Types of V-Belts
Wrapped Molded which has a fabric cover and is molded into a V-shape
Raw Edge which is cured and then cut into a V-shape

13. Wrapped V-Belt Construction
1. Protective fabric cover impregnated with rubber
2. Tension Section - synthetic rubber compounded to stretch as belt bends
3. Cords - synthetic fiber cords carry the power and minimise stretch
4. Compression Section - synthetic rubber compound to support cords evenly and compress as belt bends

14. Raw Edge V-Belt Construction
1. Tension Section - specially woven stress-relived fabric
2. Cords - synthetic high modulus cord to carry high loads with minimal stretch
3. Compression Section - Stiflex rubber compound and precision molded cogs increase flexibility and supports cords
4. Raw Edge Side Walls - provide uniform anti-slip surface, greater flexibility and allow more cord

15. Advantages Raw Edge vs. Wrapped
Performs up to 4% more efficiently
Generates less heat build up
Allows smaller pulley diameters
Increased power ratings
Provides longer life

16. Classical or Multiple V-Belts
Gold Ribbon Cog Belt
Raw Edge Classical
Premium Product
Super Blue Ribbon
Wrapped Molded Classical
Highest Volume Belt
Super II V-Belts
Raw Edge Classical
Extreme Duty

17. Fractional Horsepower Light-Duty V-Belts
Durapower FHP
Standard FHP Line
Durapower II FHP
Raw Edge FHP Line
XDV Xtra Duty V-Belt
Premium Lawn/Garden Line

18. Narrow or Wedge Multiple Belts
Power Wedge Cog V-Belts
Raw Edge
Increased HP Capability
Super Power Wedge V-Belts
Wrapped Molded
Increased HP Capability

19. Banded Belts Gold Ribbon Cog-Band Raw Edge Premium Product
Super Vee-Band
Wrapped Molded
Standard product
Wedge-Band Cog-Band
Raw Edge
Higher HP
Wedge-Band Wrapped
Wrapped Molded
Higher HP

20. Synchronous Belts RPP Panther RPP Plus Dual RPP
Synchro-Cog Timing Belt
Synchro-Cog Dual Timing Belt

21. Specialty Belts Double Angle V-Belts Dry Can Belting
Thoro-Twist V-Belts

22. from www.c-rproducts.com sales@c-rproducts.com Tel: +44 1327 701030
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