Series 4 Single Cheek Block- 54mm Plain Bearing Blocks Barton plain bearing blocks have a precision molded acetal sheave running on a large diameter brass bearing, ensuring free running under the highest of loads. Specifications: - Sheave size: 54mm x 17mm
- Max rope diameter: 12mm
- Safe working load: 750kg / 1650lbs
- Breaking load: 1500kg / 3300lbs
- Length: 107mm
- Weight: 178g
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