Industrial pulley 400 mm, 3 grooves, section B

EMMAR POLEA 400 3B belongs to pulleys, part of our Power transmission range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for POLEA 400 3B and any equivalents.

The POLEA 400 3B is a V-belt pulley from EMMAR, built for drives that need multiple belts running side by side. Its 400 mm diameter, 3 grooves and section B profile make it a common choice for industrial machinery, fans, compressors and power transmission systems. Because MR produces this pulley in its own manufacturing operation, the machining and dimensions are controlled at every step.

Reading the code is straightforward: POLEA 400 3B gives you the outside diameter in millimeters, the number of grooves and the belt section. The B section matches B-profile V-belts, and three grooves let you run up to three belts in parallel so the load is shared across them. When paired with a drive pulley, the 400 mm diameter sets the transmission ratio. The part is machined with ground grooves so the belts seat correctly, and each batch is checked dimensionally.

You will find this pulley on industrial fans, screw compressors, centrifugal pumps, mills, mixers and conveyors, as well as on machine tools and process equipment that rely on several belts to keep the load per groove down. In tight installations, a larger diameter like this one lets you reach a required ratio while keeping the groove count needed for the power being transmitted.

During installation, confirm the shaft diameter and key match the pulley bore. Line up the drive and driven pulleys to prevent uneven belt wear and vibration. Set tension according to the belt manufacturer's recommendation: too much tension loads the bearings, too little causes slipping. When replacing an existing pulley, compare the outside diameter, groove count, section and bore diameter before ordering. If anything is unclear, ask our team.

If your application calls for a different groove count, diameter or section, MR can manufacture it or source it. To request an equivalent, send the part number POLEA 400 3B by WhatsApp along with the original pulley's data — diameter, grooves, section and shaft diameter — and, if possible, the machine or equipment it runs on. Our technical team will review the details and send you a quote.