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Timing Belt Excessive Belt Edge Wear

Timing belts running on flanged timing belt pulleys with parallel misalignment (offset sprockets) may exhibit excessive timing belt edge wear on both edges if the belt is pinched between opposite flanges. Timing belt failures may then occur by tooth root cracks or tears initiating from both edges of the timing belt. These tears may eventually extend across the entire width of the timing belt, resulting in tooth shear.

  • Parallel Misalignment
  • Timing Belt Edge Wear

Probable Cause:

  • Damage due to handling

Corrective Action:

  • Follow proper handling and storage procedure

Probable Cause:

  • Flange damage

Corrective Action:

  • Reinstall, replace, repair flange

Probable Cause:

  • Timing belt too wide

Corrective Action:

  • Use proper width timing belt pulley

Probable Cause:

  • Timing belt tension too low

Corrective Action:

  • Adjust tension to recommended value

Probable Cause:

  • Rough flange surface finish

Corrective Action:

  • Reinstall, replace, repair flange

Probable Cause:

  • Improper tracking

Corrective Action:

  • Check parallel and angular alignment of the timing belt pulleys

Probable Cause:

  • Timing belt hitting drive guard or bracketry

Corrective Action:

  • Eliminate or control condition

Probable Cause:

  • Misalignment

Corrective Action:

  • Check parallel and angular alignment of the timing belt pulleys

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