Why has my Timing belt broken and how can I analyse this?

FINDINGS

DIAGNOSTIC

TIPS

Excessive wear of the belt flanks

1. Incorrect handling
2. Flange damaged
3. Belt too wide
4. Not enough tension
5. Rough flange
6. Poor meshing
7. Belt in contact with housing

1. Follow installation instructions
2. Repair the flange or replace the pulley/flange assembly
3. Use an appropriate pulley
4. Check tension and compare with recommended value
5. Repair or replace the flange (avoid rough materials)
6. Correct alignment
7. Remove obstructions

Breakage of traction ropes

1. Excessive shock loads
2. Insufficient pulley diameters
3. Incorrect handling / storage
4. Dirt or foreign object in transmission
5. Eccentric toothed pulley

1. Recalculate the transmission and adapt it to functional constraints
2. Recalculate the transmission and use larger diameters
3. Follow handling and storage recommendations
4. Remove debris and check the housing
5. Replace the pulley

Cracks

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 the transmission and use suitable diameters
2. Use an inner roller or increase the diameter of the outer roller
3. Preheat the installation before starting
4. Protect the transmission
5. Fit the hub according to the instructions

Premature wear of teeth

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. Pulleys of inadequate size
9. Belt in contact with casing or supports
10. Excessive load
11. Pulley material not hard enough
12. Dirt or foreign object in transmission
13. Poor hub/pulley assembly

1. Adjust to recommended value
2. Correct the alignment of the non-flanged pulley
3. Correct alignment
4. Use correct Belt/Timing belt combination
5. Replace pulleys
6. Replace pulleys
7. Replace pulleys
8. Replace pulleys
9. Remove obstructions or use a roller
10. Recalculate the transmission and adapt it to the required loads
11. Use pulleys of a different make
12. Clean the transmission and check the housing
13. Fit the hub according to the instructions

Pulling teeth

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 the transmission and adapt it to the required loads
2. Recalculate the transmission
3. Replace the pulley
4. Replace the pulleys
5. Use an internal roller
6. Use correct belt/pulley combination
7. Correct alignment
8. Tension the Belt according to the recommended values