Ball Bearing


Series 75 Ratchet Pivoting Low Lead Block with Cleat, Single

Single Pivoting Low Lead Ratchet Block with Cleat


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.

Adjustable C-Cleat™.


Product Specifications
Max. Rope diameter (in)1/2
M.W.L. (lb)930
Sheave diameter (in)3
B.L. (lb)3020
Weight (oz)14.3
Fastener Ø (in)1/4

Product Information

Powerful grip

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.

Compositite C-Cleat™ and adustable cleat arm

The RF72175 Series 75 Ultimate Ratchet Block is fitted with our carbon reinforced C-Cleat™ for secure rope holding with low entry and exit efforts, and fairlead for fast action from any angle. Cleat arms are made of Grade 316 stainless steel and are adjustable for setting to your preferred cleating angle.

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®.


Resource Files


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