Industrial pulley 330 mm, 7 grooves, section B

EMMAR POLEA 330 7B 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 330 7B and any equivalents.

This EMMAR-made pulley carries the designation 330 7B and belongs to the section B V-belt family. It measures 330 mm in diameter and has seven grooves. On a driven shaft, it takes motion from a smaller drive pulley and spreads the load across multiple belts. Equipment such as pumps, fans, compressors and conveyors often uses this type of drive where uptime matters and the pulley needs to run true.

Reading the code is straightforward: 330 is the outside diameter in millimeters, 7 is the groove count, and B is the V-belt section. Section B is a middle-of-the-road profile found in many industrial drives. With seven grooves, the pulley can share torque among several belts, which reduces the chance of slip and helps heat escape. The grooves are machined and the pulley is balanced for continuous operation.

You will see this pulley on fixed-speed equipment: centrifugal pumps, fans and exhausters, screw compressors, conveyors, mixers and machine tools. It mounts on the driven shaft and is turned by a smaller pulley on the motor. Seven grooves make sense when the transmitted power is high or when you want some redundancy—if one belt fails, the rest can keep the machine running until a replacement is fitted.

When selecting a pulley, work from the pitch diameter rather than the outside diameter, because the actual speed ratio depends on pitch diameter. Confirm that the equipment shaft matches the bore and that the keyway is the right size. Alignment between the two pulleys must be accurate; even a small angular error will wear grooves and belts in a short time. Belt tension also matters: loose belts slip and overheat, while overly tight belts put extra load on bearings.

If you need a different groove count, another diameter or a different section, this pulley can be manufactured to order. To request an equivalent, send the part number 330 7B or the equipment details: current pulley diameter, number of grooves, belt section, shaft diameter and keyway type. With that information we can propose a similar standard pulley or make one to your specification. We can also quote the complete assembly with belts and mounting bushings.

MR Industrial Accessories LLC manufactures this pulley and offers it as part of a broader power transmission range that includes belts, bushings, housings and bearings. If you are replacing a worn pulley, a photo of the part and the part number sent by WhatsApp or email is enough to start a quote.