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Chain Sprockets
Bored & Keyed Sprockets
1/2inch Pitch Bored & Keyed Sprockets
Quick Code: BB-701025
08B1 21T Sprocket Comes With 20mm Bore & Keyway with 2 Grubscrews (4SR21 20BK&2GS)
The 08B1 21T Sprocket with 20mm Bore & Keyway is a precision-engineered chain sprocket designed for reliable power transmission in industrial applications. This sprocket features a 1/2 inch pitch and comes complete with pre-machined specifications to simplify installation and reduce setup time.
Key Features:
- Tooth Count: 21 teeth for balanced speed and torque ratios
- Bore Diameter: 20mm pre-machined bore
- Keyway: Integrated keyway for secure shaft coupling
- Grubscrews: Supplied with 2 grubscrews for dual-point shaft locking
- Pitch: 1/2 inch pitch chain compatibility
- Ready to Install: No additional machining required
Applications:
This versatile sprocket is ideal for use in:
- Conveyor systems
- Packaging machinery
- Agricultural equipment
- General industrial power transmission systems
- Chain drive replacements and new system designs
The 21-tooth configuration makes this sprocket particularly suitable for applications requiring a balanced combination of speed and torque delivery. As part of our comprehensive range of 1/2 inch pitch bored and keyed sprockets, this product ensures compatibility across your power transmission systems while delivering the precision and durability required for demanding industrial environments.
Reference: 4SR21 20BK&2GS SPKT

