Vibration

Timing belts produce low levels of vibration that may be objectionable in sensitive equipment. This vibration stems from the teeth as they mesh with timing belt pulleys and from the timing belt's high tensile modulus (stiffness), a characteristic that holds consistent belt pitch under load. To reduce such vibration, choose timing belt pulleys with diameters larger than the minimum size available because the timing belt teeth mesh more smoothly and also select a belt with a high stiffness characteristic.

Probable Cause:

• Incorrect timing belt tooth profile for the timing belt pulley

Corrective Action:

• Check timing belt / timing belt pulley compatibility

Probable Cause:

• Excessive load

Corrective Action:

• Check horsepower rating
• Redesign drive

Probable Cause:

• Center to center distance exceeds eight (8) times small timing belt pulley diameter

Corrective Action:

• Use inside idler
• Redesign drive

Probable Cause:

• Too low or high tension

Corrective Action:

• Adjust tension to recommended value

Probable Cause:

• Unbalanced timing belt pulleys

Corrective Action:

• Replace timing belt pulley(s)
• Remount bushing and timing belt pulley

Probable Cause:

• Weak support structures or mounts

Corrective Action:

• Reinforce structure

Probable Cause:

• Bushing or key loose

Corrective Action:

• Remount bushing and timing belt pulley