Single sprocket with hub, pitch 1/2", 21 teeth

MR Piñón simple 1/2" Z21 is a sprockets and gears reference, within Power transmission. Request a quote for Piñón simple 1/2" Z21 via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.

The simplex sprocket 1/2" Z21 is a sprocket supplied by MR Accesorios Industriales, designed to transmit motion in 1/2" pitch chains. It has 21 teeth and a hub, and is machined in SAE 1045 steel. It is used in power transmissions that require a specific speed ratio and direct mounting on the shaft. If you need to replace a worn sprocket or build a new transmission, this part number gives you a concrete reference to start the inquiry.

This item is a simplex sprocket with hub of 1/2" pitch and 21 teeth (z). The designation Simplex sprocket 1/2" Z21 summarizes the essentials: a single row of teeth, half-inch pitch and twenty-one teeth. The material is SAE 1045 steel, a carbon steel with good machinability and strength, common in transmission parts that work under moderate loads. The hub allows it to be mounted directly on the shaft, with the bore and keyway defined in the order.

Sprockets of this type appear in chain drives of agricultural machinery, conveyors, elevators, belts and general drive equipment. They are also found in production lines and machine tools where a fixed ratio between two shafts is needed. Being 1/2" pitch, it is compatible with chains of that pitch, and the number of teeth defines the transmission ratio together with the driven wheel. It is a wear part: it is advisable to inspect it when noise, chain jump or deformed tooth profiles appear.

To select the sprocket properly, take into account the chain pitch, the number of teeth, the shaft diameter and the type of fastening. The hub accepts different finishes: through bore, keyway, set screws or screw fastening. Also check the alignment between sprocket and wheel, the chain tension and the lubrication. A misaligned mounting accelerates wear on teeth and chain, and can generate vibrations throughout the assembly.

If you need an equivalent or a neighboring size, send us the part number MR-PINON-SIMPLE-1-2-Z21 or the full designation via WhatsApp. You can also provide the pitch, the number of teeth and the shaft diameter, and we will confirm alternatives within the same series. If the sprocket comes with a custom-machined hub, indicate the bore, the keyway and any other mounting condition so that the quote is complete.

MR Accesorios Industriales supplies this sprocket and also provides bearings, housings, power transmission, seals, bushings, mounting tools and lubricants since 1945. If you want to move forward, send the part number or the size you need via WhatsApp and we will send you the quote.