Industrial pulley 70 mm, 3 grooves, section A

EMMAR POLEA 70 3A 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 70 3A and any equivalents.

The POLEA 70 3A is a V-belt pulley that EMMAR manufactures with a 70 mm diameter and three grooves cut for section A belts. It serves as the driving or driven element in belt transmissions between parallel shafts. Because EMMAR produces this pulley in-house, the machining and balance are controlled at the source.

Reading the code is straightforward: 70 is the diameter in millimeters, 3A tells you there are three grooves for an A-section belt. That combination sets both the speed ratio and the number of belts the drive can carry. The pulley is a single solid piece with no moving parts, mounted on a shaft and secured with a key or a set screw depending on the hub design. Grooves are machined to match the belt profile so the belt seats evenly and runs without slipping.

You will find this size on machine tools, compressors, fans, pumps, conveyors and general plant equipment. It also appears on agricultural implements and food-processing machines. When a worn pulley needs replacing or you are setting up a new ratio, three grooves let you run multiple A-section belts on the same pulley width, which suits light and medium drives. Treat it as a wear item: inspect it if a belt jumps off or the drive starts making noise.

To select the correct pulley, confirm three things: the outside diameter, the number of grooves and the belt section. Then check the bore against the shaft it will sit on, and make sure the key fits snugly. On high-speed applications, balance deserves a look. During installation, align the pulleys with a straightedge or laser so the belt does not wear on one side, and set tension following the machine manual.

If your drive calls for a different diameter, a different groove count or another belt section, MR can manufacture or source it. To get a quote, send the code POLEA 70 3A or the details of the original pulley: diameter, grooves, section and shaft diameter. The team can also help if you are unsure about the drive ratio or which belt type to use.