Transmissions
Chain Sprockets
Bored & Keyed Sprockets
1/2inch Pitch Bored & Keyed Sprockets
Quick Code: BB-701008
08B1 20T Sprocket Comes With 28mm Bore & Keyway with 2 Grubscrews (4SR20 28BK&2GS)
Buy Now
Product Specification
Bore
28mm
Number of Teeth
20
Pitch
1/2inch
Reference
4SR20 28BK&2GS SPKT
Quick Order Code
BB-701008
Product Description
The 08B1 20T Sprocket with 28mm Bore & Keyway and 2 Grubscrews is a precision-engineered chain sprocket designed for 1/2 inch pitch chain systems. This versatile sprocket combines reliable performance with convenient pre-machined features, making it an excellent choice for balanced speed and torque drive applications in industrial power transmission systems.
Key Features:
- 20 Teeth – Optimal design providing excellent balance between speed and torque for general purpose applications
- 1/2 Inch Pitch – Standard pitch compatible with 08B1 chain systems
- 28mm Pre-Machined Bore – Ready for direct shaft mounting without additional machining
- Integral Keyway – Ensures positive shaft engagement and prevents rotational slipping
- 2 Grubscrews – Provides secure and adjustable clamping for reliable power transmission
Ideal Applications:
This sprocket is perfectly suited for use in:
- Conveyor systems and material handling equipment
- Packaging and labeling machinery
- Industrial equipment requiring balanced torque and speed transmission
- Agricultural machinery and farm equipment
- General power transmission systems and machine tool drives
- Mechanical automation systems
Reference: 4SR20 28BK&2GS SPKT
Whether you require a replacement sprocket for existing equipment or are designing a new chain drive system, this 20-tooth sprocket offers the perfect balance of performance and ease of installation for general purpose drive applications.

