100 Chain A Plate Sprocket Size Chart

100A plate sprockets are flat, hubless sprockets designed for use with #100 roller chain. A Type A sprocket does not have a hub, which makes it a useful option for compact assemblies, custom mounting setups, weldments, fabricated equipment, and applications where the sprocket may need to be machined or adapted to fit the equipment.

#100 roller chain has a 1.250″ pitch, also commonly written as 1-1/4″ pitch. When selecting a 100A plate sprocket, the most important details are chain size, tooth count, outside diameter, bore size, and how the sprocket will be mounted in the application.

100 Chain A Plate Sprocket Size Chart

What Is an A Plate Sprocket?

A Type A plate sprocket is a flat sprocket without a hub. Because there is no hub, A plate sprockets are useful where space is limited, where the sprocket needs to be mounted to another component, or where the bore needs to be machined for a custom setup.

For #100 chain, the sprocket pitch matches the chain pitch of 1.250″, or 1-1/4″. The tooth count changes the sprocket diameter, speed ratio, and chain wrap, which is why choosing the correct size matters.

Common Applications for 100A Plate Sprockets

100 Chain A Plate Sprockets are commonly used in heavy-duty conveyors, agricultural equipment, material handling systems, industrial machinery, fabricated drive systems, and OEM equipment. They are a strong choice when a simple plate-style sprocket is needed and the mounting method is handled separately from the sprocket itself.

These sprockets are also helpful for machine shops, maintenance departments, and fabricators that need a plain bore sprocket to modify for a specific shaft, weldment, fixture, or custom drive layout.