Timing Belt Working Principle

Timing belt drive is composed of a ring belt with equally spaced teeth on the inner circumference surface and a pulley with corresponding teeth, when running, the belt teeth and pulley teeth groove mesh to transmit motion and power, it is a new type of belt drive that combines the advantages of belt drive, chain drive gear drive.

timing belt and synchronous pulley installation and use precautions.

Reduce the center distance of the pulley, if there is a tension pulley should be loosened first, install the belt and then adjust the center distance. For fixed center distance transmission, the belt pulley should be removed first, and the belt should be installed on the pulley before the pulley is installed on the shaft and fixed.

The Following Points Should Also Be Noted During Installation

① When installing timing belt, if the center distance of the two pulleys can be moved, the center distance of the pulleys must be shortened first, and then the center distance should be reset after the timing belt is installed. If there is a tensioning pulley, relax the tensioning pulley first, then install the timing belt, and then install the tensioning pulley.

②To install the timing belt on the pulley, remember not to use excessive force, or use a screwdriver to pry the timing belt, in order to prevent the timing belt in the tensile layer to produce the appearance of imperceptible fracture phenomenon. When designing the belt pulley, it is best to use the structure that the two axes can move close to each other, if the structure does not allow, then it is best to install the timing belt and the belt pulley together to the corresponding axis.

③Control the appropriate initial tensioning force.

④timing belt drive, the parallelism of the two pulley axis requirements are relatively high, otherwise the timing belt in the work will produce runout, or even jump out of the pulley. The axis is not parallel will also cause uneven pressure, so that the belt teeth early wear.

⑤ The frame supporting the pulley must have enough rigidity, otherwise the pulley will cause the non-parallelism of the two axes during the operation of the code lock.

Damage Form

1. Insufficient tensioning force.

If the tensioning force is not enough, then the friction will not be enough, followed by slippage will occur, so that the timing belt wear increases, so that other lost the ability to transmit the load, transmission instability so that the belt drive lose effectiveness.

2. Tension force is too large.

The timing belt is subjected to too much tension, deformation is more serious, it will let the timing belt's service life is reduced.

3. Timing belt with debris.

If the timing belt is left with grease and other dirt, because the dirt contains chemical substances, which can enter the timing belt, destroy its material structure composition.

4.Timing belt wheel is not aligned.

If the timing belt wheel is not aligned will cause the timing belt to slip, twist and internal heat wear, so the timing belt wheel must be aligned.

5. timing belt length is not equal.

If the length of a row of belts is not equal, each timing belt will bear the size of the tension will be different, some will produce slippage or too much tension, so that the timing belt wear. Therefore, when using must use the same model timing belt.

6. if the timing belt does not operate for a long time, you need to remove it, otherwise it will reduce the useful life of the timing belt, so that the timing belt deformation.

7.If the timing belt is placed for too long, it will make the rubber aging and reduce the life.

8. If the use of the site environment there is dust, acid and alkali gas or some other gases that will harm the timing belt, the same will make the timing belt's service life is shortened.

9、Vibration amplitude is too large.

If the machine vibration and let the timing belt fast jerk, this will let the timing belt appear to be serious sunshine also, thus reducing the service life.

10., start overload.

Timing belt running in overload conditions, will produce too much tension, resulting in the timing belt due to sliding and breakage.

  1. Timing belt wheel groove is worn.

Timing belt wheel is used for too long, the wear and tear of the groove edge to enhance the angle is not correct, timing belt that will touch the bottom of the groove, in order to drive the machine, and must go to increase the tensioning force, resulting in v-belt breakage.

Common problems

1、Timing belt teeth broken

2、Belt side abnormal wear

3、timing belt using the tooth edge of serious wear

4、timing belt runaway

5、timing belt longitudinal open


1、No kinked belt, install wide belt or large pulley, increase pulley diameter or wide belt, remove foreign objects, correct tensioning.

2, correct tensioning, install a larger width, higher power transmission belt / increase timing belt size and pulley size, check the belt type, if necessary, change


3、Replace the timing belt pulley.

4、re-aligning the shaft, replacing the flange of the pulley, reinforcing the bearing or chassis.

5、Replace flanged pulleys, realign pulleys/shafts, correct tension, remove foreign objects, install shields, check cutting devices and belt guides.