Industrial pulley 90 mm, 3 grooves, section B

EMMAR POLEA 90 3B is a pulleys reference, within Power transmission. Request a quote for POLEA 90 3B via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.

The 90 3B pulley is a V-belt drive pulley, with a 90 mm diameter and three grooves for section B belts. It is used to drive shafts from a motor, distributing power across three belts in parallel. It is an in-house manufactured part, EMMAR brand, designed for building drives in plants, workshops and process equipment. If you need to replace an existing pulley or build a new assembly, send us the part number and we'll quote you.

This item is a pulley with a 90 mm diameter, 3 grooves and section B. The designation POLEA 90 3B summarizes those three variables: the 90 mm outside diameter, the number of grooves (3) and the belt profile it accommodates, section B. The grooves are machined so that the belt rests on the flanks, not on the bottom, which is how a V-belt drive works. It is an in-house manufactured pulley, EMMAR brand, not a third-party catalog part.

It is used in drives where the load needs to be distributed across three belts: fans, compressors, pumps, conveyor belts and machine tools. It also appears in process equipment where the drive shaft runs at one speed and the driven shaft needs another, and in replacements of worn or broken pulleys. Having three grooves allows more power than a single-groove pulley of the same diameter, as long as the shaft and tensioner keep up.

To mount it, check that the shaft diameter matches the pulley bore and that the key fits without play. Align the pulleys with a straightedge or an alignment laser: angular or parallel misalignment wears the belt and the grooves. Tension is adjusted according to the equipment manual or with a tension meter; if you don't have the data, aim for the belt not to slip on startup and not to be overloaded. Check that the grooves have no burrs or wear on the flanks.

If you need an equivalent pulley or a nearby size, send us the full part number, the number of grooves and the belt section. With that data we can see if there is a pulley of another diameter in the same section B or if it is better to switch to another section. We can also evaluate machining the bore and keyway according to your shaft. The more precise the information, the faster we can give you a useful alternative.

To request a quote for this pulley or ask about a different size, send the part number POLEA 90 3B by WhatsApp to MR Accesorios Industriales. If you have a photo of the old pulley or the shaft drawing, even better: that way we confirm grooves, section and bore before manufacturing. We handle technical inquiries from workshops, plants and maintenance teams.