Ball Bearing


Series 75 Ratchet, Pivoting Low Lead Block

Single Pivoting Low Lead Ratchet Block


Unrivalled 20:1 holding power.

Dual sided On/Off switch.

Ability to operate On/Off switch under load.

Low friction ball bearing system.


Cheek cut-outs for easy bearing maintenance


Product Specifications
B.L. (kg)1370
M.W.L. (kg)420
Max. Rope diameter (mm)12
Weight (g)270
Fastener Ø (mm)6

Product Information

Maintains alignment with a variable line entry-angle. The line passes through the centre of the pivot support, remaining as close to the deck as possible. The patented extruded hole design, in conjunction with the groove profile of the sheave, provides a more powerful grip than conventional designs - up to 20:1 holding power.

Unrivalled low weight is achieved by the use of a Torlon® ratchet pawl, high-grade machined alloy sheave and black Acetal hubs and bearings. ON/OFF switching knob is fitted to both sides of the swivel blocks (one can be removed if desired). Ratchet blocks can be disassembled for sheave replacement with RF72000.

Technical Information

Specification Details

Specification Details


Mainsheet on powerful dinghies and skiffs. Control line applications on larger yachts. Spinnaker sheets on sportsboats and small keel boats (lateral lead blocks).



  • Ball bearings: High compression strength acetal.
  • Sheave and cheek plates: Anodised aluminium.
  • Ratchet pawl: High strength Torlon®.


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