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

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

The double sprocket with hub, 3/4" pitch and 21 teeth is a power transmission component designed to mount on shafts and transmit motion through 3/4" pitch chains. Its SAE 1045 steel construction provides resistance to wear and to the loads typical of continuous operation. This is a part supplied by MR Accesorios Industriales, intended for replacement and assembly of drives in industrial and agricultural equipment.

This item is a double sprocket with hub, made of SAE 1045 steel, with 3/4" pitch and 21 teeth. The designation Double sprocket 3/4" Z21 indicates that it is a part with two toothed rings integral to a central hub, which allows it to be mounted on a shaft and transmit motion to two chains simultaneously or on different planes. The 3/4" pitch corresponds to the chain that meshes with this sprocket, and the 21 teeth define the transmission ratio. The hub facilitates mounting and securing on the shaft.

Double sprockets with hub are used in chain drives where power needs to be distributed to two outputs or where two transmission lines must be kept aligned. They appear in conveying equipment, agricultural machinery, lifting systems and drive mechanisms in industrial plants. Their function is to transfer rotary motion from a drive shaft to the chains, withstanding traction loads and the wear typical of continuous meshing.

To correctly select this sprocket, take into account the chain pitch (3/4"), the number of teeth (21) and the shaft diameter where the hub is mounted. Verify that the chain and sprocket are compatible in pitch and that the alignment between them is adequate to avoid premature wear. SAE 1045 material offers a good combination of mechanical strength and hardenability, suitable for continuous service with adequate lubrication.

If you need a sprocket with a different number of teeth, a different pitch or a hub with specific dimensions, you can inquire about a nearby size or an equivalent. MR Accesorios Industriales supplies sprockets and chain wheels, so variants within the same 3/4" pitch line can be evaluated. For that, the most practical approach is to send the current part number or the characteristics you need to replace.

To request a quote for this double sprocket 3/4" Z21, send the part number MR-PINON-DOBLE-3-4-Z21 via WhatsApp to MR Accesorios Industriales. If you have doubts about compatibility with your chain or mounting on the shaft, attach a photo or the measurements of the assembly and we will help you confirm the part. We can also advise you on alternatives within our supply line.