Industrial pulley 250 mm, 4 grooves, section A

EMMAR POLEA 250 4A is a pulleys reference, within Power transmission. Request a quote for POLEA 250 4A via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.

The POLEA 250 4A pulley is a V-belt drive pulley, section A, with a 250 mm diameter and 4 grooves. It is used to transmit power between parallel shafts in industrial equipment, where speed must be increased or reduced while maintaining torque. It is in-house manufactured, EMMAR brand, which allows the machining and concentricity of the assembly to be controlled. It is mounted on shafts with a keyway and aligned with the drive pulley to prevent uneven belt wear.

This item is a pulley with a 250 mm diameter, with 4 grooves for section A belts. The designation POLEA 250 4A summarizes those three variables: size, number of grooves and section. Section A corresponds to classic V-belts with a narrow profile, suitable for medium power and moderate speeds. Because it is in-house manufactured, EMMAR brand, the pitch diameter, groove width and balance can be verified before dispatch. We recommend confirming the shaft diameter and the type of keyway before requesting a quote.

Typical applications include fans, centrifugal pumps, screw compressors, belt conveyors and machine tools. In process plants it is used to couple electric motors with gearboxes or with the final equipment. It also appears in suction systems and packaging lines. Having 4 grooves allows the load to be distributed among several belts, which reduces the individual tension and improves the service life of the assembly. It is a general-purpose pulley in industrial maintenance.

For mounting, check that the shaft is clean, free of burrs and with the keyway in good condition. The pulley must fit with a tolerance that does not allow radial or axial play. Once in place, check the alignment with a straightedge or laser: a misalignment of a few degrees accelerates wear on the belts and grooves. Belt tension is adjusted according to the belt manufacturer's manual; in general, the minimum tension that prevents slipping is sought. Check the tightening of the fastening screws after the first hours of operation.

If you need a pulley with a different number of grooves, a different diameter or for section B or C belts, it can be custom manufactured. To request an equivalent or a nearby size, send the part number POLEA 250 4A or the drawing with the critical dimensions: outer diameter, shaft diameter, groove width and number of grooves. A photo of the original pulley with a ruler next to it also works. With that data, the technical team at MR Accesorios Industriales evaluates feasibility and replies with a quote.

MR Accesorios Industriales manufactures this pulley at its plant and sells it together with belts, bushings and housings. If you already have the part number, write to us on WhatsApp and we will send you the quote. If you are not sure about the designation, tell us what equipment you are repairing and we will help you identify it.