Friction ring

Friction ring

The aluminium low friction ring for tree care work - tree felling, removal of branches, redirection, etc.


The range of friction rings allows different techniques than those used with a rigging pulley. The small ring is mostly used for redirects, the large one mostly for the main anchor. The medium ring is adapted to both uses.


Internal diameter20 mm (0.79 in)28 mm (1.10 in)38 mm (1.50 in)
External diameter50 mm (2.00 in)70 mm (2.76 in)99 mm (3.90 in)
Groove U-shape14 mm (0.55 in)20 mm (0.79 in)28 mm (1.10 in)
Weight50 g (1.76 oz)136 g (4.80 oz)395 g (13.93 oz)
  MBS65 kN135 kN240 kN
  WLL13 kN27 kN48 kN
MBS175 kN260 kN475 kN
WLL35 kN52 kN95 kN


Friction is a major advantage, since it reduces the effort on the components of the rigging system that is used. It is easy to see in the use as main anchor. For the ground crew, slowing down loads is made simpler. Friction also gives the climber great comfort, since there is less strain on the upper anchor of the system. It is a valuable asset to improve comfort and thus safety.

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