Ronstan RF55151 Orbit 55 Cheek Block – 55mm Ball BearingThe Ronstan RF55151 Orbit Series 55 Cheek Block is engineered for high performance sailing applications, offering exceptional strength to weight ratio. Featuring a 55mm sheave, this block accommodates rope diameters up to 10mm. Its 2 stage orbital ball bearing system ensures low friction and high load capacity, with a maximum working load of 500kg and a breaking load of 1000kg. The block's low profile design and recessed underside make it ideal for

High UV resistance

It’s a perfect match for popular Auto Anchor models like the AA150

8mm - 1020kg

ignition-protected panel-mount design

making it an excellent choice for both recreational sailors and competitive racers

ergonomic fit for confident trimming and manoeuvres

and control line systems on yachts and performance sailboats

9m² per litre

Its hollow tube rivet head allows easy attachment using screws

96mm x 35mm

it’s safe for use in engine compartments and tough marine environments

Volts 12DC