Tufnol cheek block

Tufnol Cheek Block

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Single Tufnol cheek blocks come in four sizes to work with ropes from 10mm through to 16mm. They can be fixed to decks, cabin sides, etc with four countersunk screws or bolts/machine screws.

Tufnol is a traditional laminated plastic material made from phenolic resin and woven cotton or linen fabric.  It is strong and light, and provides an economical, low maintenance and traditional solution for sailing boat blocks.

Our Tufnol blocks are manufactured in Holland with solid stainless steel frames and brass bush bearings.


Plate Size 

Rope Size* Sheave
Breaking Load 
Safe Working

 2-3/4" x 1-1/2"
(58mm x 37mm)

 10mm  30mm  Approx. 600kg  300kg 4 x 6g screws

 3-3/8" x 1-7/8"
(85mm x 47mm)

 12mm  35mm  Approx 860kg  430kg 4 x 10g screws

 4-3/8" x 2-1/2"
(110mm x 64mm)

 14mm  50mm  Approx 1500kg  750kg 4 x 10g screws

5-1/4" x 3"
(134mm x 76mm)

 16mm  63mm  Approx 1810kg  905kg 4 x 12g screws

* Note - we recommend choosing products one rope size size larger than indicated to ensure adequate free movement.