Industrial pulley 120 mm, 4 grooves, section A

EMMAR POLEA 120 4A is a reference of pulleys, within Power transmission. Request a quote for POLEA 120 4A via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.

The 120 4A pulley is an in-house manufactured power transmission pulley, EMMAR brand, with a 120 mm diameter, 4 grooves and A-section. It is used to transmit motion from a motor or gear reducer to one or several shafts by means of V-belts. Its construction allows several grooves to be aligned in the same plane and maintains the transmission ratio. It is a key part in machines that need constant speed and low maintenance, such as fans, compressors, pumps and conveyors.

This pulley has a 120 mm diameter, 4 grooves and A-section. The A-section corresponds to classic narrow-profile V-belts, and the 4 grooves allow four belts to be mounted in parallel to distribute the load. The 120 mm diameter defines the transmission ratio together with the driven pulley. It is an in-house manufactured pulley, EMMAR brand, designed for industrial applications that require robustness and repeatability. It is machined with ground grooves so that the belts seat evenly and wear is uniform.

It is used in belt drive equipment: centrifugal fans, screw compressors, centrifugal pumps, belt conveyors, mixers and machine tools. It also appears in multiple drive systems where power must be added without increasing belt width. With 4 grooves, it is common in drives that start under load or run many hours per day. In process plants, workshops and water treatment plants, this pulley handles the connection between the motor and the machine shaft.

To mount it, verify that the shaft and keyway are clean and free of burrs. The pulley is secured with a key and set screw or with a taper bushing, depending on the hub design. It is important to align the pulleys with a straightedge or a laser so that the belts do not come off or wear on one side. Tension is adjusted according to the equipment manual: too little tension causes slipping, too much stresses the bearings. Check parallelism and concentricity before starting up. If the pulley has 4 grooves, all belts must be the same length and in good condition.

If you need an equivalent pulley, send us the part number POLEA 120 4A or the diameter, number of grooves and section shown on the equipment nameplate. We can also evaluate variants with a different diameter or number of grooves within the same A-section. If you have doubts about mounting or the type of hub, ask us and we will guide you. We work with in-house manufacturing, so we can adjust the part to your needs. Write to us on WhatsApp and we will quote you shortly.

MR Accesorios Industriales manufactures this pulley in its workshops and sells it together with belts, bushings and bearings so you can assemble the complete set. If you already have the part number, send it by WhatsApp and we will provide the quote. If you do not have it at hand, tell us what machine you are repairing and we will help you identify it.