Lower Fore St, Beer, East Devon, EX12 3EG
Barton Ball Bearing Blocks feature a unique super-low friction ball race system, comprising acetal sheaves and delrin ball bearings running on a large diameter centre boss.
The Barton ball bearing design fits in more load-bearing balls, and consequently promotes extremely low friction performance, even under high loads.
Barton Size | Maximum Line Ø | Sheave Ø Single/Double | Sheave Ø Fiddle Lower | Sheave Ø | Sheave Width | SWL | MBL | MLR |
---|---|---|---|---|---|---|---|---|
Size 1 | 8mm | 30mm | na | na | 12mm | 355kg | 710kg | 245kg |
Size 2 | 8mm | 35mm | 30mm | 45mm | 12mm | 370kg | 740kg | 260kg |
Size 3 | 10mm | 45mm | 30mm | 58mm | 13mm | 400kg | 800kg | 270kg |
Size 4/5 | 12mm | 54mm | 38mm | 64mm | 17mm | 750kg | 1500kg | 525kg |
Ø = Diameter MBL = Manufacturer (Barton) rated break load SWL = Safe Working Load MLR = Maximum Rolling Load = the maximum free running load that ball bearing blocks will accept before ball bearings distort.
Barton Advisory on Break Loads: Where break and safe working loads are stated, it is assumed that all sheaves are evenly loaded as in a purchase tackle. Uneven loading, or loading of one sheave in a double or triple block, will severely affect strength quoted.