Industrial pulley 420 mm, 3 grooves, section B

EMMAR POLEA 420 3B is a pulleys reference, within Power transmission. Request a quote for POLEA 420 3B via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.

The 420 3B pulley is a V-belt drive pulley manufactured by EMMAR Accesorios Industriales. It has a 420 mm diameter and three grooves for section B belts, which allows power to be transmitted from a drive shaft to one or several driven shafts. It is used in equipment that requires a stable transmission ratio and good drive capacity, such as fans, compressors, pumps and process machinery. Because it is in-house manufactured, groove machining and balancing are controlled so that the belt seats properly and lasts.

This item is a pulley with a 420 mm diameter and three grooves for section B belts. The designation POLEA 420 3B summarizes those three variables: size, number of grooves and section. The grooves are machined with the profile corresponding to section B, so that the belt rests on the flanks and not on the bottom. The pulley is mounted on the shaft through the central bore, which is defined according to the equipment's shaft diameter; that data is confirmed at the time of inquiry.

Typical applications of a three-groove section B pulley are drives where more torque is required than with a single-groove pulley: centrifugal fans, screw compressors, centrifugal pumps, screens, mixers and transmission lines in process plants. It is also used to upgrade existing equipment when the transmitted power needs to be increased without changing the diameter ratio. In all cases, the pulley works together with a drive pulley and a set of belts of the same section.

To correctly select this pulley, take into account the pitch diameter, the number of grooves and the belt section. Check that the bore diameter matches the shaft and that the keyway is suitable. Mounting must be done with the pulley clean and free of burrs, adjusting the tensioner so that the belts work at the recommended tension. Misalignment between pulleys accelerates wear on the belt and the grooves, so it is advisable to check with a straightedge or laser before starting up.

If you need a pulley with a different number of grooves, another diameter or a different section, it can be custom manufactured. To request an equivalent or a nearby size, send the part number POLEA 420 3B or the drawing with the main dimensions: outside diameter, shaft diameter, number of grooves and section. A photo of the original pulley with a ruler next to it also works. With that data, the part is quoted.

MR Accesorios Industriales manufactures this pulley in its factory, with concentricity and balancing control. If the pulley is part of equipment that is out of service, send the part number by WhatsApp and we will reply with the quote. We can also advise you on the right section B belt to complete the assembly.