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Inspection Technologies, Inc
Belt Friction Test Machine

The COF4X-2000 is a unique universal test stand designed to accurately characterize poly-v ribbed and flat belts for their coefficient of friction, noise, and various other properties. The COF4x-2000 complies with SAE standard J2432.

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Copyright 2006 Inspection Technologies, Inc


The COF4X-2000 is a fourth generation product that was originally developed in conjunction with automotive OEMs and Belt Manufacturers to characterize accessory drive belts for coefficient of friction. The latest generation boasts a smaller footprint and increased versatility with regards to lengths of belt and available amount of force.  The stand is capable of testing both the frontside (ribbed) and backside (flat) of accessory belts under dynamic conditions. Other stands test small sections of belts in a static state.

The COF4X-2000 is universally configurable for:
  • Frontside or Backside Tests
  • Wet or Dry Tests
  • Belt lengths of 800 - 3000mm
  • Belt widths of 3K -  8K
Copyright 2006 Inspection Technologies, Inc

Test Parameters 

Tested Pulley Speed: 0-1800rpm
Torque Load: 195Nm (fixed or Variable)
Belt Wrap Angle: 0 - 200 (fixed or variable)
Belt Tension:
180 Nm (static)








Copyright 2006 Inspection Technologies, Inc

Output Type and Interface 
Reaction Torque  Via in-line torque transducer
Drive Pulley Speed  Via speed sensor
Tested Pulley Speed  Via speed sensor
Idler Pulley Speed  Via speed sensor
Belt Wrap Angle  Via servo motor encoder
Belt Temperature  Via IR Sensor
Coefficient of Friction  Calculated
Slip  Calculated
Power  Calculated

Sample Software Output


Copyright 2006 Inspection Technologies, Inc




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The software controls for the COF4X-2000 are developed using Labview from National Instruments The software is customized to provide a 'dashboard' look and feel allowing the operator to view inputs and outputs at a glance. Virtual gages reflect the status of all commands and devices for various tests.


Copyright 2006 Inspection Technologies, Inc

For more Information:

Inspection Technologies, Inc.
111. E 10 Mile
Madison Heights, MI 48071





Copyright 2006 Inspection Technologies, Inc


Inspection Technologies, Inc. is an L.A.B Accredited Inspection facility. Utilizing years of experience and the latest in CMM and Laser digitizers, ITI is able to accurately inspect and reverse engineer a wide variety of parts, fixtures, and gages. Size capabilities range from the smallest part to full scale automobile scanning and beyond.

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Copyright 2006 Inspection Technologies, Inc