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40B9 sprockets feature a B-Style Hub which is a hub on one and they have 9 high-precision teeth. Our 40B9 sprockets fully meet ANSI specifications to ensure proper contact between the sprocket teeth and #40 roller chain. Additionally, they are manufactured using high-quality steel and put through a strict quality control process to ensure you always receive a consistent premium product. If you don't see the bore size you need please contact us and we can re-bore the sprocket to the requested bore size. We also offer #40 roller chain, stainless #40 sprockets, and complete custom Made To Order sprockets. For more information, large quantity request, or re-bore sprockets please contact us and we will be happy to assist you.
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