Training Module

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Training Module Belt Basics
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Means of Power Transmission

• V-Belts
• Chains
• Gears
• Timing Belts

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V-Belt Basics

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

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V-Belts

• The function of a belt is to transfer rotation
  from the powered pulley to one or more driven
  pulleys
• The belt must be designed and manufactured to
  transfer this power efficiently and reliably

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Types of Belts

• Classical V-Belts
• Fractional Horse-Power V-Belts
• Narrow (Wedge) V-Belts
• Double Angle (Hexagonal) V-Belts
• Joined (Banded) Belts
• V-Ribbed Belts
• Variable Speed Belts
• Synchronous (Timing) Belts

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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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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 to replace
• Relatively unaffected by moisture, abrasive
  dusts, or extreme variations in temperature
• Acts as a fuse for the system components

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V-Belts

• V-Belts work using the principle of the wedge

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V-Belt Construction
Tension Section Tensile Members Compression
Section
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V-Belt Components

• Rubber
• Abrasion resistance
• Heat resistance
• Oil resistance
• Flex resistance
• Static conductivity
• Cord
• Strength
• Shock load
• Belt stretch
• Fabric
• Clutching requirements
• Static conductivity
• Crack resistance
• Flexibility

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Wrapped V-Belt Construction

• 1. Cover - 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 minimize 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-relieved fabric
• 2. Cords - synthetic cord carries load 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 more efficiently
• Generates less heat
• Increases H.P. rating
• Provides longer life

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The Right Belt for the Application
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The Right Belt for the ApplicationCarlisle
Premium Raw-Edge Belts

• FHP
• Durapower II
• Classical
• Super II
• Gold Ribbon Cog
• Narrow
• Power-Wedge

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Durapower II V-BeltA real heavyweight in the
light duty arena

• Premium materials provide longer life
• Stress-relieved cover fabric provides maximum
  flexibility
• Cord is specially treated to maintain belt loads
  without stretching
• Raw-Edge side walls grip pulleys minimizing belt
  slip, noise and vibration
• Special neoprene compounds support cords evenly
  and resist flex fatigue

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Durapower II FHP V-Belt
Product Name Durapower II FHP (light duty)
V-Belt
Product Brand
Part No format Profile (3L, 4L, 5L), outside
length (inches)
Sizes/classifications Light duty/fractional
h.p., raw edge construction
Example A 5L750 is an FHP belt with an
outside length of 75, A top width of 5/8 and
a depth of 11/32.
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Super II V-BeltThe Problem Solver

• Greater strength from centrally placed, specially
  treated polyester cord
• Longer life on severe drives
• Resists rollover
• Better grip with controlled slippage
• Greater flexibility
• Smaller pulleys
• Backside idlers
• Raw-Edge sidewalls minimize slip, noise and
  vibration
• 100 neoprene resists heat, oil and ozone

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Super II V-Belt
Product Name Super II V-Belt
Product Brand
Part No format A, B, C followed by inside
length
Sizes/classifications Classical profile,
raw-edge construction, 21 to 200
Example B94 has an inside length or standard
length designation of 94, and an outside
length of 96.8. It has a 21/32 top width
and a 7/16 depth.
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Gold Ribbon Cog-Belt
The Energy Saver

• Higher horsepower
• Longer life
• More energy efficient
• Reduce downtime, save energy
• Raw-Edge sidewalls minimize slip, noise and
  vibration

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Gold Ribbon Cog-Belt
Product Name Gold Ribbon Cog-Belt
Product Brand
Part No format AX, BX, CX, DX followed by
inside length
Sizes/classifications Classical profile, raw
edge construction, 23 to 362
Example CX225 has an inside length or standard
length designation of 225 inches, and an
outside length of 227.2 inches. It has a 7/8
top width and 9/16 depth.
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Power-Wedge Cog-Belt

• Reduce cost, space and weight
• Transmit more torque with less slip
• Higher horsepower rating
• Greater design flexibility
• Longer life
• Smoother running
• Higher efficiency for energy savings
• Improved belt flex - reduced bending stress

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Power-Wedge Cog-Belt
Product Name Power-Wedge Cog-Belt
Product Brand
Part No format Profile (3VX, 5VX, 8VX)
followed by outside length (X10)
Sizes/classifications Narrow wedge
profile, raw edge construction
Example 5VX630 has an outside
length of 63 inchesnot 630. The
length in the part number is the outside as
opposed to classical belts that show
inside length. It has a 5/8 top
width and a 17/32 depth.
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Belts that Better the Bottom Line

• Carlisle energy efficient raw edge belts improve
  system performance
• Payback is significant and begins immediately
• The larger the number of drives and higher the
  horsepower, the more you save

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Belts that Better the Bottom Line

• Install Gold Ribbon Cog-Belts for immediate
  energy savings without modifying your drives
• Conventional V-Belts deteriorate to a nominal
  efficiency of 93 percent
• Carlisle Gold Ribbon Cog Belts maintain 95
  efficiency
• Gold Ribbons higher horsepower capacity and
  longer life reduces maintenance intervals and
  down time

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PowerMiser

• Use PowerMiser to determine the cost
  effectiveness of replacing existing V-belts with
  Carlisle raw edge belts
• Download at www.CarlisleBelts.com

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PowerMiserSample Calculation