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Analysis of Synchronous belts breakage

Timing & conveyor belts with mechanical joint system

Diagnosis of Synchronous belts problems

ProblemProbable causeCorrective action

Excessive wear on belt flanks

Image
Usure des flancs de la courroie
  1. Incorrect handling
  2. Flange damaged
  3. Belt too wide
  4. Insufficient tension
  5. Rough flange surface
  6. Poor meshing
  7. Belt in contact with housing
  1. Follow recommendations
  2. Repair flange or replace Pulley
  3. Use the correct width pulley
  4. Adjust tension to recommended value
  5. Repair or replace flange (avoid rough materials)
  6. Correct alignment
  7. Remove obstructions or use inner roller or supports

Traction rope breakage

Image
Rupture des cordes de traction
  1. Excessive shock loads
  2. Insufficient pulley diameters
  3. Incorrect handling/storage
  4. Dirt or foreign object in transmission
  5. Eccentric pulley
  1. Recalculate transmission and adapt to required loads
  2. Recalculate transmission and use larger diameters
  3. Follow recommendations before installation, handling and storage
  4. Remove debris and check housing
  5. Replace pulley

Cracks

Image
Craquelures
  1. Insufficient pulley diameters
  2. Outer roller
  3. Extremely low starting temperatures
  4. Prolonged contact with harmful chemicals
  5. Poor hub/pulley assembly
  1. Recalculate transmission and use larger diameters
  2. Use an inner roller or increase the diameter of the outer roller
  3. Preheat
  4. Protect transmission
  5. Fit hub according to instructions

Premature wear of teeth

Image
Usure prématurée des dents
  1. Tension too low or too high
  2. Belt partially off pulley
  3. Misalignment
  4. Unsuitable belt teeth (e.g. HTD®, GT, etc.)
  5. Worn pulleys
  6. Rough pulley teeth
  7. Damaged pulleys
  8. Inadequate pulley dimensions
  9. Belt in contact with housing or supports
  10. Excessive load
  11. Pulley material insufficiently hard
  12. Dirt or foreign object in transmission
  13. Poor hub/pulley assembly
  1. Adjust to recommended value
  2. Correct alignment of non-flanged pulley
  3. Correct alignment
  4. Use correct belt/pulley combination
  5. Replace pulleys
  6. Replace pulleys
  7. Replace pulleys
  8. Replace pulleys
  9. Remove obstructions or use roller
  10. Recalculate transmission and adapt to required loads
  11. Use differently manufactured pulleys
  12. Clean transmission and check housing
  13. Fit hub according to instructions

Pulling teeth

Image
Arrachement des dents
  1. Excessive jerking
  2. Less than 6 teeth in mesh
  3. Eccentric Pulley
  4. Pulley wear
  5. Outer roller
  6. Unsuitable Belt teeth (e.g. HTD®, GT, etc.)
  7. Misalignment
  8. Insufficient tension
  1. Recalculate transmission and adapt it to required loads
  2. Recalculate transmission
  3. Replace pulley
  4. Replace pulleys
  5. Use an inner roller
  6. Use correct belt/pulley combination
  7. Correct alignment
  8. Tension belt according to recommended values

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