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Chain Sprockets
Bored & Keyed Sprockets
1/2inch Pitch Bored & Keyed Sprockets
Quick Code: BB-701016
08B1 21T Sprocket Comes With 18mm Bore & Keyway with 2 Grubscrews (4SR21 18BK&2GS)
The 08B1 21T Sprocket with 18mm Bore & Keyway and 2 Grubscrews is a precision-engineered power transmission component designed for reliable chain drive performance in demanding industrial applications. This 1/2 inch pitch sprocket combines robust construction with ease of installation, making it an excellent choice for both replacement and new system designs requiring balanced speed and torque characteristics.
Key Features:
- 21 Teeth – Optimised for moderate speed ratios with enhanced torque delivery in industrial drive systems
- 18mm Pre-Machined Bore – Ready for immediate shaft mounting without additional machining, ideal for standard industrial shaft diameters
- Integrated Keyway – Ensures secure, anti-slip shaft connection and positive power transmission
- Dual Grubscrews – Provides superior holding security and prevents shaft slippage during operation
- 1/2 Inch Pitch – Compatible with standard 08B1 chain specifications
- Ready-to-Install Design – Reduces assembly time and costs with no additional machining required
Applications:
This sprocket is ideal for use in:
- Conveyor systems and material handling equipment
- Industrial packaging machinery and automation systems
- Agricultural equipment and farm machinery
- General industrial power transmission systems
- Medium-duty drive installations requiring efficient power transfer
- Equipment retrofits and replacement installations
- Applications requiring moderate speed reduction with standard shaft accommodation
Whether you need a replacement sprocket for existing equipment or are engineering a new chain drive system, this component offers the precision and reliability required for demanding industrial applications. The pre-bored and keyed design with 18mm bore eliminates costly machining operations, reducing downtime and installation costs while accommodating standard shaft specifications.
Reference: 4SR21 18BK&2GS SPKT
As part of our extensive range of over 165 bored and keyed sprockets, this product offers excellent value for applications requiring the optimal balance between tooth count and bore size. Our technical team is available to assist with specification selection for your specific drive requirements.
