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V-Belt Basics. Means of Power Transmission V-Belts Chains Gears Timing Belts.

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Presentation on theme: "V-Belt Basics. Means of Power Transmission V-Belts Chains Gears Timing Belts."— Presentation transcript:

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 Compression Section Tension Section Tensile Members

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 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 Two Major Belt Categories

12 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 Two Major Types of V-Belts

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 XDV Xtra Duty V-Belt Premium Lawn/Garden Line Durapower II FHP Raw Edge FHP 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 BeltSynchro-Cog Dual Timing Belt

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

22 Tel: Fax: from


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