Barton Size 4/5 Ball Bearing Blocks - 12mm

54mm diameter sheave

Delrin ball bearings

Maximum rope diameter 12mm

Break load 1500Kg

Maximum rolling load 525kg

£ 27.70 inc VAT

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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 Size 4/5 Specification:

  • Maximum rope diameter: 12mm
  • Sheave Dimensions, single/double: 54mm diameter x 17mm width
  • Sheave Dimensions, fiddle: 38mm lower sheave, 64mm upper sheave diameter x 17mm width
  • SWL (Safe Working Load) 750Kg
  • Manufacturer Break Load 1500Kg
  • Maximum rolling load 525kg

Maximum rolling load on ball bearing blocks is the maximum free running load before ball bearings will 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.