Block 50mm single swivel

Plain Bearing Blocks are engineered for lightweight, strength, and superior handling. We use stiff glass fiber reinforced nylon to provide metal-like strength,self-lubricantsheavereduces friction and increase efficiency to control the line and 316 stainless steel plain bearing to provide smooth rotation.Plain Bearing blocks givesailors easier power transfer and less wearon rope.50mm Single swivel Block -BB-0501FSheaves: 50mmMaximum line: 10mmWeight:70gMax. working load: 522kgMax breaking load: 1050kgs Sheave: Self-lubricant acetal compositeBall Bearing:316 stainless steel plain bearingSideplates/frames: Reinforced glass fiber Nylon composite with UV stablizedShackle: Forged Grade 316 stainless steel / tool-free leverlock mechanismAPPLICATIONSMainsheet systemMast foot blocks and Mast head blocksHalyard tuning andvangControl lines on boats of all sizes