Belt installation

1: Generally, try to install the belt without tension. If the belt must be installed under tension, ensure that the edge of the pulley or the installation tool does not damage the wedge teeth and ropes of the belt.
2: The alignment requirements of the pulley: the deviation angle must be controlled within 0.25 °, or 2.5mm/500mm (center distance).
3: because the pulley and belt have dimensional tolerance, so it is recommended to measure the belt tension or frequency in the installation of each belt, by adjusting the center distance to control the tension or frequency in the specified range.
4: The conditions under which the belt needs to be re-tensioned: (the belt must be re-tensioned in the following situations):
* Slippage due to insufficient belt tension
* Sliding noise due to insufficient belt tension
* Abnormal belt wear caused by insufficient belt tension
5: Belt tension/frequency measurement tool-U-508.

Cut three samples with a length of 250 mm from one PJ V-ribbed belt, and mark a marking line with a spacing of 100mm at the middle position of the PJ V-ribbed belt. When more than three samples cannot be taken from one PJ V-ribbed belt, samples can be cut from the same batch of PJ V-ribbed belt, but must be indicated in the report. 7.4.2 High temperature resistance test method
Place the sample at 100 ℃ ± 2 ℃ for 96 h ± 1 h and then take it out. After standing at laboratory temperature for more than 2h, bend it along a cylinder with a diameter of 20 mm at a contact angle of at least 90 °.