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1/2inch Pitch Bored & Keyed Sprockets
Quick Code: BB-701022
08B1 21T Sprocket Comes With 25mm Bore & Keyway with 2 Grubscrews (4SR21 25BK&2GS)
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Product Specification
Bore
25mm
Number of Teeth
21
Pitch
1/2inch
Reference
4SR21 25BK&2GS SPKT
Quick Order Code
BB-701022
Product Description
The 08B1 21T Sprocket with 25mm Bore & Keyway is a precision-engineered power transmission component designed for reliable chain drive applications. This sprocket features a pre-machined 25mm bore with integrated keyway and dual grubscrews, providing secure and stable shaft mounting without requiring additional machining work.
Key Features:
- Tooth Count: 21 teeth for optimal power transmission ratios
- Bore Size: 25mm pre-machined bore with keyway
- Chain Pitch: 1/2 inch (08B1 standard)
- Mounting Security: Dual grubscrews for reliable shaft retention
- Ready-to-Install: Pre-machined bore and keyway eliminate additional machining requirements
Ideal Applications:
This versatile sprocket is suitable for use in:
- Conveyor systems and material handling equipment
- Packaging machinery and automation systems
- Agricultural equipment and farm machinery
- General industrial power transmission applications
- Chain drive system replacements and upgrades
Reference: 4SR21 25BK&2GS SPKT
As part of our extensive range of over 165 bored and keyed sprockets in stock, this component combines quality engineering with immediate availability to support your production and maintenance needs.

