Industrial pulley 330 mm, 7 grooves, section B

EMMAR POLEA 330 7B is a pulleys reference, within Power transmission. Request a quote for POLEA 330 7B via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.

The 330 7B pulley is a V-belt drive pulley, section B, with a 330 mm diameter and 7 grooves. It is used to drive shafts from a motor, distributing power across several belts to transmit more torque without slipping. It is an in-house manufactured part, EMMAR brand, designed for equipment that runs many hours a day and needs a balanced pulley with machined grooves and good alignment. It is mounted on pumps, fans, compressors and conveyors.

This item is a pulley with a 330 mm diameter, 7 grooves and section B. The designation POLEA 330 7B summarizes those three data points: the pulley's outside diameter, the number of grooves and the belt section it takes. Section B is a medium-profile V-belt, widely used in intermediate-power industrial drives. The seven grooves allow the load to be spread across several belts, so the pulley can transmit more torque than a single-groove one, with lower risk of slipping and better heat dissipation.

Typical applications are fixed-drive equipment: centrifugal pumps, fans and exhausters, screw compressors, conveyor belts, mixers and machine tools. In all those cases the pulley is mounted on the driven equipment's shaft and receives motion from a smaller drive pulley. Having seven grooves is advisable when the power to be transmitted is high or when a safety margin is wanted: if one belt breaks, the remaining ones keep the equipment running until it can be replaced.

To select this pulley properly, take into account the pitch diameter, not just the outside diameter, because the actual transmission ratio depends on it. Check that the equipment shaft matches the pulley bore and that the keyway is the correct size. Alignment between drive and driven pulley must be precise: a misalignment of a few degrees wears the grooves and belts within a few weeks. Also check belt tension: too loose and they slip and overheat, too tight and they overload the equipment's bearings.

If you need a pulley with a different number of grooves, a different diameter or for a different section, it can be custom manufactured. To request an equivalent or a nearby size, send us the part number POLEA 330 7B or the equipment data: current pulley diameter, number of grooves, belt section, shaft diameter and keyway type. With that data we confirm whether we have a similar pulley in the line or whether it is better to manufacture it. We can also quote the complete assembly with the belts and mounting bushings.

MR Accesorios Industriales manufactures this pulley at its plant and sells it along with the rest of the power transmission line: belts, bushings, housings and bearings. If you are replacing a worn pulley, send a photo of the part and the part number by WhatsApp. We will reply with the quote and the available alternatives.