For high-capacity smooth roll mills
As mill capacity grows, roll lengths and drive power on the smooth roll mills grow too. Delivering a low but stable speed differential without slip on these machines needs a wider belt. The PL26 smooth roll triple set is a three-pulley drive with a 26-rib PL belt and pulleys chosen for the smooth-passage ratio.
Fitting a wide belt correctly
A 26-rib belt is about 122 mm wide. The wider the belt, the more even a small angular misalignment over-tensions one edge. Therefore:
- Fit the pulleys with their taper bushes and tighten the bushes evenly in turn.
- Check alignment at two separate points on the pulley face with a straight edge or laser.
- Fit the belt with the tensioner released; never lever it into the grooves with a screwdriver.
- Set the tension, run the mill briefly without load, then measure the tension again.
Choosing the belt
The belt’s rib count and length must match the pulley set exactly. In a double-sided drive layout both faces of the belt must be ribbed. Belts from different makers may stretch differently even at the same size; sticking to the same type when replacing keeps the ratio stable.
Symptoms and remedies
- Wear on one edge of the belt: misalignment; realign the pulleys.
- Squealing: low tension or worn grooves.
- Transverse cracks in the belt: ageing or excess heat; replace the belt.
Altınbaşak prepares PL26 smooth roll sets complete with bushes to fit your shafts.
