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 Ball Bearing Blocks Specifications:
|Barton Size||Maximum Line Ø||Sheave Ø Single/Double||Sheave Ø Fiddle Lower||Sheave Ø||Sheave Width||SWL||MBL||MLR|
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.