Finished Bore Roller Chain Sprockets

These finished bore roller chain sprockets are precision-engineered components designed for reliable, low-maintenance power transmission in a wide range of chain-driven mechanical systems. This paired set provides a versatile solution for applications requiring either single or synchronized dual-chain drive configurations.

Construction & Materials

Manufactured from high-strength carbon steel, each sprocket undergoes a specialized heat-treatment process of quenching and tempering, creating a hardened tooth surface (HRC 42–48) for exceptional wear resistance, paired with a tough, ductile core that can withstand impact loads and torsional stress. The precision-machined, smooth metallic finish on the bores and hubs ensures precise alignment and reduces friction, while the heat-treated teeth resist elongation and fatigue, ensuring a long service life even under continuous operation. The uncoated steel surface is optimized for compatibility with heavy lubrication, extending performance in dusty, high-load environments.

Design Features

Precision Finished Bore: The pre-machined, dimensionally accurate bore ensures a direct, slip-free press fit onto standard drive shafts, eliminating the need for additional keyways or set screws in light to medium-duty applications. This design simplifies installation and reduces assembly time, while the tapered hub on one sprocket accommodates precise axial positioning.

Optimized Tooth Profile: The teeth are cut to exact industry standards using CNC hobbing, ensuring a precise profile that meshes smoothly with roller chains. This minimizes chain wear, reduces noise and vibration, and maintains consistent torque transfer even at moderate to high rotational speeds.

Robust Hub Design: The integrated one-piece hub provides increased structural rigidity, distributing axial loads evenly and preventing premature fatigue. The design of the right-hand sprocket features a stepped hub, allowing it to be used in applications where the sprocket must be positioned close to a bearing or housing.

Performance & Applications

These finished bore sprockets excel in applications requiring straightforward installation and reliable chain-driven power transmission, such as:

Light to medium-duty industrial conveyor systems and packaging equipment

Agricultural machinery including small tractor drives, grain augers, and hay balers

Material handling systems and automated production lines

HVAC systems and small industrial gearboxes

Their combination of rugged construction, precision engineering, and simplified installation makes them a dependable choice for systems where efficiency and low maintenance are critical.