Industrial pulley 120 mm, 4 grooves, section A

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

The 120 4A pulley is a power transmission pulley of in-house manufacturing, EMMAR brand, with 120 mm diameter, 4 grooves and section A. It is used to transmit motion from a motor or gearbox to one or several shafts by means of V-belts. Its construction allows aligning several grooves in the same plane and maintaining 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 120 mm diameter, 4 grooves and section A. Section A corresponds to classic V-belts of narrow profile, and the 4 grooves allow mounting four belts 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 where robustness and repeatability are required. It is machined with ground grooves so that the belts seat evenly and wear is uniform.

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

To mount it, check that the shaft and the keyway are clean and free of burrs. The pulley is fixed 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 punishes 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 or a nearby size, send us the code POLEA 120 4A or the diameter, number of grooves and section shown on the equipment plate. We can also evaluate variants with a different diameter or number of grooves within the same section A. 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 need. 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 code, send it via WhatsApp and we will send you the quote. If you don't have it at hand, tell us what machine you are repairing and we will help you identify it.