Single sprocket with hub, pitch 3/4", 21 teeth

MR Piñón simple 3/4" Z21 is a sprockets and gears reference, within Power transmission. Request a quote for Piñón simple 3/4" Z21 via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.

The simplex sprocket 3/4" Z21 is a sprocket that MR Accesorios Industriales supplies, designed to transmit motion in 3/4" pitch chains. Its hub allows it to be mounted directly on the shaft with a keyway, without the need for additional adapters. It is supplied in SAE 1045 steel, which gives it adequate strength for continuous service in industrial environments. It is a key part in power transmission systems where durability and a precise fit with the chain are sought.

This sprocket has a 3/4" pitch and 21 teeth, with a simplex row and hub design. It is manufactured in SAE 1045 steel, a material that offers good toughness and wear resistance. The hub allows it to be mounted on shafts with a keyway and fastened with set screws or through bolts, depending on the equipment design. As it is supplied by MR, the tolerances and heat treatment are guaranteed to ensure smooth meshing with the chain.

It is used in 3/4" pitch chain drives in a wide variety of equipment: conveyors, bucket elevators, agricultural machines, mixers and motion systems in industrial plants. It is also common in applications where shafts must be synchronized at low or medium speed. Its robust construction makes it suitable for environments with dust, humidity or variable loads, provided that adequate lubrication is applied and alignment is checked.

To select this sprocket correctly, take into account the number of teeth of the driving and driven sprockets, the desired transmission ratio, the power to be transmitted and the working revolutions. Check that the shaft diameter matches the hub bore and that the keyway is compatible. It is important to check the chain tension and the alignment between sprockets to avoid premature wear. If you need guidance, the MR technical team can advise you.

If this sprocket does not fit your needs, we can offer you a nearby size or an equivalent. For that, send us the current part number, the number of teeth, the pitch and the shaft dimensions. We can also evaluate variants in other materials or with special heat treatment. The idea is for you to find the part that best suits your machine, without hassle.

Do you need this sprocket or a similar one? Write to us by WhatsApp and send us the part number MR-PINON-SIMPLE-3-4-Z21 or the characteristics of your application. We will reply with the quote and the technical data you need. At MR Accesorios Industriales we have been working since 1945 to provide solutions in power transmission, bearings and industrial accessories.