Single sprocket with hub, pitch 5/8", 21 teeth

MR Piñón simple 5/8" Z21 is a sprockets and gears reference, within Power transmission. Request a quote for Piñón simple 5/8" Z21 via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.

The simplex sprocket 5/8" Z21 is a sprocket that MR supplies, designed to transmit motion in 5/8" pitch chains. It has 21 teeth and a hub, and is machined in SAE 1045 steel. It is used in power transmissions where a sturdy sprocket with controlled dimensions is required, and it is combined with ANSI chains of the same pitch to build gearboxes, conveyors and general machinery.

This item is a simplex sprocket with hub, 5/8" pitch and 21 teeth (Z21), which MR supplies in SAE 1045 steel. The designation says it all: simplex because it has a single row of teeth, with hub because the hub protrudes from the disc to house the shaft and the set screws, and 5/8" pitch because that is the dimension that defines the chain it meshes with. SAE 1045 steel is a medium-carbon steel that allows the teeth to be hardened while keeping a tough core, suitable for continuous service.

Typical applications of a 5/8" pitch sprocket with 21 teeth appear in moderate-speed chain drives: chain conveyors, bucket elevators, mixers, woodworking machines, packaging equipment and roller drives. It is also used as a drive or driven sprocket in custom-built gearboxes, where the number of teeth defines the ratio together with the sprocket or wheel at the other end. As a product that MR supplies, we can source the same geometry when it is replaced due to wear.

To select this sprocket correctly, check that the chain pitch is 5/8" and count the teeth of the wheel it will work with to calculate the ratio. Check the shaft diameter and the hub fastening system: keyway, set screws or both. Check the alignment between sprocket and wheel, the chain tension and the lubrication; a poorly tensioned or unlubricated chain accelerates tooth wear. If the assembly works with shock or heavy load, it is advisable to evaluate a steel with additional heat treatment.

If you need an equivalent or a nearby size, the most practical thing is to send us the complete sprocket part number, a photo of the part and the shaft data: diameter, hub length and type of fastening. With that we can see whether there is a close size in the same 5/8" pitch series or whether it is better to source the sprocket made to order. We can also quote the assembly with the chain and the complementary wheel so that the transmission is assembled and balanced from the first installation.

MR Accesorios Industriales supplies split plummer block housings, ANSI chains and pulleys (sheaves), and also bearings, power transmission, seals and lubricants. If this simplex sprocket 5/8" Z21 fits your equipment, send the part number by WhatsApp and we will send you the quote with the technical data you need to confirm the installation.