Single sprocket with hub, pitch 1/2", 19 teeth

MR Piñón simple 1/2" Z19 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 1/2" Z19 and any equivalents.

For drives that run 1/2" pitch chain, this simplex sprocket with hub carries 19 teeth and is made from SAE 1045 steel. The single toothed plate and the central hub let you mount it on a shaft and lock it with a set screw, a key, or both, depending on how the equipment is built. It is a component MR supplies for assembly and replacement work in industrial machinery.

Reading the designation helps you confirm the fit: simplex means one row of teeth, 1/2" is the chain pitch the sprocket meshes with, and Z19 is the tooth count. That tooth count, paired with the sprocket on the other end of the drive, sets the transmission ratio. The hub is the raised section that takes the shaft, and it gives you the room to fasten the sprocket by screw, key, or both.

You will find this size in chain drives on conveyors, elevators, mixers, and general power transmission equipment. Because it is a 1/2" pitch, 19-tooth sprocket, it suits medium ratios and can be used on either the drive or the driven shaft. It is also a common replacement item where a 1/2" pitch chain is already in service and only the sprocket needs to be renewed.

Before ordering, check three things: that the chain pitch is 1/2", that 19 teeth give you the ratio you want, and that the hub bore and fastening method match your shaft. On high-load or high-speed drives, pay attention to lubrication and to keeping the sprocket aligned with the chain, since both affect wear. SAE 1045 steel is a through-hardening grade, so the part can be hardened or case hardened if the service calls for it.

If your machine needs a different tooth count, another pitch, or a different hub size, ask about an equivalent. MR supplies sprockets and chain wheels, so variants within the same 1/2" pitch line can be quoted. Send the part number MR-PINON-SIMPLE-1-2-Z19 or the full designation by WhatsApp or email, and the team will reply promptly with the option that fits your equipment.