Single sprocket with hub, pitch 3/4", 25 teeth

MR Piñón simple 3/4" Z25 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 simple 3/4" Z25 and any equivalents.

This simplex sprocket with hub runs on 3/4" pitch roller chains and carries 25 teeth, so it pairs with a driven wheel to set the ratio in a chain drive between parallel shafts. The extended hub gives you a broad seating surface on the shaft and takes a key, a set screw, or both. SAE 1045 steel is the base material, which suits the abrasion that power transmission parts normally see and leaves room for machining to match your assembly.

The designation Z25 is simply the tooth count, and it is the figure you need first when you work out the ratio against the mating wheel. A single row of teeth defines the simplex layout, while the hub projects past the toothed disc. That projection is what lets the sprocket sit squarely on the shaft and transmit torque through a wider contact area instead of a thin plate. Units like this are usually found on shafts turning at moderate speed.

You will see this size in chain drives on conveyors, bucket elevators, mills, mixers, agricultural equipment, and general transmission machinery, as well as in gearboxes and mechanisms where a defined ratio has to be held. As a part MR supplies, the machining can be reviewed against the requirements of the equipment, as long as the base geometry stays at 25 teeth and 3/4" pitch.

Selection comes down to three things: the chain pitch at 3/4", the tooth count of 25, and the shaft diameter at the mounting point. Depending on the torque involved, the hub can be locked with a key, a set screw, or both. Line the sprocket up with the driven wheel before you tighten anything, since misalignment is what shortens the working life of both the chain and the teeth. If the ratio is not right, keep the same pitch and move to a wheel of a different diameter.

When you request an equivalent, give us the part number MR-PINON-SIMPLE-3-4-Z25 or the full designation over WhatsApp. If you would rather describe the application, send the pitch, the number of teeth, and the shaft diameter, and we will quote the part that fits. We work with suppliers, so machining variants based on this simplex sprocket with hub can be evaluated.

MR Industrial Accessories supplies power transmission components. This simplex sprocket 3/4" Z25 sits in our line of sprockets and chain wheels. For technical guidance or a quote, message us on WhatsApp with the part number and we will get back to you promptly.