Industrial pulley 420 mm, 4 grooves, section B

EMMAR POLEA 420 4B is a pulleys reference, within Power transmission. Request a quote for POLEA 420 4B via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.

The 420 4B pulley is a power transmission pulley of in-house manufacturing, EMMAR Accesorios Industriales brand. It is designed to mount on shafts and transmit motion through V-belts of section B. With a 420 mm diameter and 4 grooves, it allows several belt lines to be organized on the same shaft. It is used in equipment where fans, pumps, compressors or process machinery need to be driven with a defined transmission ratio.

This item is a pulley with a 420 mm diameter, 4 grooves and section B. The designation POLEA 420 4B summarizes those three variables: size, number of grooves and belt profile. Section B defines the width and depth of each groove, so the pulley works with V-belts of that profile. Because it is of in-house manufacturing, EMMAR brand, the machining of the hub, the grooves and the balancing are controlled before shipping.

Section B pulleys with multiple grooves are found in belt drives of machine tools, screw compressors, centrifugal fans, centrifugal pumps and process equipment. They also appear in production lines where power needs to be distributed among several shafts or a stable rotation speed maintained. Having 4 grooves, it accepts more than one belt in parallel, which helps distribute the load and keep the equipment running if one belt fails.

To mount it, check that the shaft diameter matches the hub bore and that the key fits without play. Align the pulley with the driving pulley using a straightedge or an alignment laser: angular or parallel misalignment accelerates wear on the belts and on the equipment's bearings. Belt tension is adjusted according to the machine manufacturer's manual; if you don't have it, aim for the belt to give just enough when pressed with a finger. Check the balancing if the pulley will rotate above 1,500 rpm.

If you need an equivalent pulley or a nearby size, send us the part number POLEA 420 4B by WhatsApp along with the number of grooves, the section and the diameter you are looking for. It also helps if you send us the shaft diameter, the type of keyway and a photo of the old pulley. With that data we check whether there is a pulley in our line that fits or whether it is better to manufacture it to measure.

MR Accesorios Industriales manufactures pulleys, split plummer block housings and ANSI roller chains, and distributes bearings, power transmission, seals and lubricants. If the 420 4B pulley is not the one you need, write to us anyway: we have a line of pulleys in different sections and diameters. Send the part number or the size by WhatsApp and we will reply with the quote.