Belt Basics

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V-Belt Basics
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Means of Power Transmission

• V-Belts
• Chains
• Gears
• Timing Belts

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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.
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V-Belts and V-Belt Drives

• V-Belts have been around since the early 20th
  century

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V-Belts and V-Belt Drives

• V-Belts work using the principle of the wedge

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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

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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

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V-Belt Drive Terms
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V-Belt Construction
Tension Section
Tensile Members
Compression Section
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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

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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

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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

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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

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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

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Advantages Raw Edge vs. Wrapped

• Performs up to 4more efficiently
• Generates less heatbuild up
• Allows smaller pulley diameters
• Increased power ratings
• Provides longer life

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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
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Fractional HorsepowerLight-Duty V-Belts
Durapower FHP Standard FHP Line
XDV Xtra Duty V-Belt Premium Lawn/Garden Line
Durapower II FHP Raw Edge FHP Line
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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
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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
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Synchronous Belts
RPP Plus
Dual RPP
RPP Panther
Synchro-Cog Timing Belt
Synchro-Cog Dual Timing Belt
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Specialty Belts
Double Angle V-Belts
Dry Can Belting
Thoro-Twist V-Belts
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www.CarlisleBelts.com
from
www.c-rproducts.com sales_at_c-rproducts.com Tel
44 1327 701030 Fax [phone]