Single sprocket with hub, pitch 1/2", 18 teeth

MR Piñón simple 1/2" Z18 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" Z18 and any equivalents.

This simplex sprocket with hub is identified by its 1/2" pitch and 18 teeth. MR Industrial Accessories LLC supplies it for roller chain drives that connect parallel shafts within the speed and load limits of that pitch. The hub lets you mount it directly on the shaft using a key and set screw, so no extra adapter is needed. It works both as a replacement component and as a building block for new drive assemblies.

The sprocket combines a 1/2" pitch, 18 teeth, SAE 1045 steel and a simplex hub configuration. Pitch and tooth count together determine the pitch diameter and the transmission ratio when the sprocket runs with another wheel on the same chain. The hub is the central section that seats on the shaft. SAE 1045 is a medium-carbon steel suited to machining and to heat treatment based on what the application requires.

Typical uses include 1/2" pitch chain drives on agricultural equipment, conveyors, packaging lines, production machinery and general drive mechanisms. It also comes up when assembling or repairing gearboxes and transmission cases that operate on that pitch. As an MR-supplied part, it can match the original geometry or be adapted to a specific machine requirement.

When selecting, check the chain pitch, the number of teeth, the shaft diameter at the mounting point and how the part will be fastened—key, screw or set screw. Confirm that the chain matches the 1/2" pitch and that the sprocket combination gives the ratio you need. If the shaft diameter differs from the hub bore, a bushing can be machined or the hub modified, working from a drawing or a sample.

To request a quote for part number MR-PINON-SIMPLE-1-2-Z18 or the full designation, send a WhatsApp message. You can also share a photo of the part along with the pitch, tooth count and shaft diameter. With that information we can point you to the standard size that replaces the current one or arrange a custom part. We work with drawings and samples for transmission components.

MR Industrial Accessories LLC supplies split plummer block housings, ANSI chains and sheaves, plus bearings, seals, bushings and lubricants. For this sprocket, the quote is prepared around the quantity and urgency of your order. Message us on WhatsApp with the item part number and we will reply with the quote and the available alternatives.