TRITAN Roller Chain Sprocket: 40, For 1/2 in Chain Pitch, 7/8 in Bore Dia, 21 Teeth
The TRITAN Roller Chain Sprocket: 40 is a Size 40 fixed-bore sprocket designed for 1/2 in chain pitch, featuring 21 teeth and a 7/8 in bore diameter, constructed from steel (MPN 40BS21H X 7/8). 3G Electric interprets…
SKU 3G-OTH-126086
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Product Description
The TRITAN Roller Chain Sprocket: 40 is a Size 40 fixed-bore sprocket designed for 1/2 in chain pitch, featuring 21 teeth and a 7/8 in bore diameter, constructed from steel (MPN 40BS21H X 7/8). 3G Electric interprets this demand and sources the genuine TRITAN component, backed by specialist expertise across 14 industrial departments — including combustion, pumps, and controls — to ensure the right part for your power transmission application.
Frequently Asked Questions
What is the TRITAN 40BS21H X 7/8 roller chain sprocket used for?
This TRITAN sprocket is used in power transmission systems to drive roller chain in industrial machinery, conveyors, and material handling equipment. It fits ANSI 40 chain with 1/2 in pitch and is suitable for applications requiring a 21-tooth sprocket with a 7/8 in bore.
What are the specifications of the TRITAN 40BS21H X 7/8 sprocket?
The TRITAN 40BS21H X 7/8 is a size 40 fixed-bore roller chain sprocket with 21 teeth, a 1/2 in chain pitch, and a 7/8 in bore diameter. It is made of steel and is designed for ANSI standard roller chain. The manufacturer part number is 40BS21H X 7/8.
Where to buy TRITAN roller chain sprockets worldwide?
3G Electric supplies TRITAN roller chain sprockets worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your location. Contact us to source the TRITAN 40BS21H X 7/8 sprocket for your power transmission needs.
How to select the correct TRITAN sprocket for a 1/2 in chain?
To select the correct TRITAN sprocket, match the chain pitch (1/2 in for ANSI 40), number of teeth (21 for this model), and bore diameter (7/8 in). Ensure the sprocket is steel for durability. Verify shaft size and keyway requirements. 3G Electric can assist with sizing for your application.
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3G Electric supplies TRITAN size 40 fixed-bore roller chain sprockets. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.













