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Chain Sprockets
Bored & Keyed Sprockets
1inch Pitch Bored & Keyed Sprockets
Quick Code: BB-701598
16B1 21T Sprocket Comes With 50mm Bore & Keyway with 2 Grubscrews (8SR21 50BK&2GS)
This 16B1 21T Sprocket is a precision-engineered chain sprocket designed for reliable power transmission in demanding industrial applications. This simplex sprocket features a 21 tooth configuration with a 50mm pre-machined bore and integral keyway, making it ideal for low-speed, high-torque drive applications requiring larger shaft diameters and maximum load capacity.
Key Features:
- Tooth Count: 21 teeth for optimised torque delivery and superior load handling
- Bore Size: 50mm pre-machined bore (largest in our standard range) with integrated keyway
- Pitch: 1 inch – compatible with standard 1 inch pitch roller chains
- Mounting Security: Supplied with 2 grub screws for secure, reliable shaft attachment and vibration resistance
- Manufacturing Standard: Precision-engineered to exacting specifications for consistent performance and exceptional durability
- Heavy-Duty Construction: Designed for continuous industrial operation with significant load and torque demands
Ideal Applications:
This high-capacity sprocket is perfect for:
- Heavy-duty low-speed conveyor systems
- Agricultural machinery drive systems with large shaft requirements
- Material handling equipment requiring maximum load capacity
- Industrial drive systems with substantial torque demands
- Power transmission assemblies with large diameter shaft specifications
- Equipment requiring reliable chain drive performance in demanding environments
- General industrial applications where low-speed, high-torque operation is essential
Reference: 8SR21 50BK&2GS SPKT
As part of our extensive range of over 150 bored and keyed sprocket variations, this 50mm bore sprocket combines maximum load capacity with precision engineering. For technical assistance in selecting the correct sprocket configuration for your specific chain drive requirements, our experienced technical sales team is ready to help.

