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

MR Piñón doble 3/4" Z21 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 doble 3/4" Z21 and any equivalents.

For drives that need to run two chains from a single shaft, this double sprocket with hub delivers reliable motion transfer. It has a 3/4" pitch and 21 teeth, and it is machined from SAE 1045 steel. The part number is MR-PINON-DOBLE-3-4-Z21, and it is available through MR Industrial Accessories LLC for industrial and agricultural equipment.

The design combines two toothed rings on one central hub, so you can mesh two chains at the same time or on separate planes without adding another shaft. The 3/4" pitch must match your chain, and the 21 teeth set the ratio. The hub gives you a solid mounting surface for securing the sprocket to the shaft.

You will find this type of sprocket in conveying lines, agricultural implements, lifting equipment and other chain drives where power is split into two paths or where two transmission lines must stay aligned. It takes the pull from the chains and the wear that comes with constant meshing.

When choosing a replacement, confirm the chain pitch (3/4"), the tooth count (21) and the shaft diameter at the hub. Check that the chain and sprocket match in pitch and that they are aligned to prevent uneven wear. SAE 1045 steel offers a balance of strength and hardenability that suits continuous duty when lubrication is maintained.

If you need a different tooth count, pitch or hub dimensions, we can look at equivalents. MR Industrial Accessories LLC supplies sprockets and chain wheels, so options within the same 3/4" pitch line can be reviewed. Send the part number you are replacing or the specifications you need.