Single sprocket with hub, pitch 1/2", 12 teeth

MR Piñón simple 1/2" Z12 belongs to sprockets and gears, 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 Piñón simple 1/2" Z12 and any equivalents.

A single-strand sprocket built from SAE 1045 steel, this 1/2" pitch, 12-tooth piece carries a hub formed as part of the body itself. That design lets it sit straight on a shaft, so no separate disc or adapter is needed, which suits compact drives and replacement work on existing transmissions.

Reading the code is straightforward: simplex means one row of teeth, 1/2" is the chain pitch it accepts, and Z12 gives the tooth count. With twelve teeth it belongs to the smaller end of the range, a position that fits reductions where the ratio calls for few teeth on the driver. The hub is machined into the same piece, so mounting happens directly on the shaft.

Typical applications include conveyors, elevators, mixers, belt systems, agricultural equipment and general transmission assemblies. Its small footprint and integrated hub make it a frequent choice on gearmotor output shafts, roller drives and any layout where radial room is tight. It also works as a drive sprocket in 1/2" pitch chains when a specific ratio with a low tooth count is required.

Before ordering, confirm the chain pitch matches 1/2" and that twelve teeth give the ratio you need. The hub has to line up with your shaft diameter and fastening method, whether that is a keyway, a set screw or both. Check sprocket-to-chain alignment, tension and lubrication as part of installation. SAE 1045 steel can be hardened and tempered when extra wear resistance is wanted.

For an equivalent, share the complete part number, tooth count, pitch and hub details such as shaft diameter, width and how it fastens. A photo or drawing of the original also helps. With that information we can propose a match within the same series or locate a suitable option from our power transmission range.

Send the part number for this simplex sprocket 1/2" Z12 by WhatsApp or email to request a quote, or ask about another size. We can also help with mounting and selection questions so the part performs as expected from the start.