Martin Sprocket & Gear, Inc. 40B18 Chain Sprocket

Martin Sprocket & Gear, Inc. 40B18 chain sprocket is designed for 40B chain drives and features 18 teeth with a 5/8" bore. The 40B18 configuration pairs a standard 40B chain with an 18-tooth sprocket to provide compact, reliable engagement in drive systems that specify this exact geometry. This sprocket is part of Martin's broad lineup of chain sprockets, offering a direct, interchangeable option for assemblies that require a 40B chain, 18 teeth, and a 5/8" bore. Use in equipment that relies on precise chain engagement and standard bore sizes to maintain alignment and torque transfer in compact power-transmission applications. The 18-tooth configuration is suited for situations where a smaller sprocket footprint is needed to achieve a specific ratio or fit within tight housings. Because the bore is 5/8", the sprocket can accommodate shafts or hubs that match that dimension, enabling a broad range of compatible drive trains.