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Choose blocks and attachments rated for your loads to build efficient, low-friction systems. Learn how sheave size, bearings, and lashing or shackle attachment affect performance.
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The Ronstan Series 100 Lashing Orbit Block (RF109109A) is a single-sheave, 360-degree swiveling block rated for lines up to 12mm (1/2 in) with a stainless steel lashing bail, built for...
Ronstan blocks are the pulleys that route and redirect running rigging—sheets, halyards and control lines—with the least possible friction, and choosing the right one comes down to three numbers: the...
Ronstan Orbit blocks are Ronstan's high-performance block range, built around a two-stage bearing system and fibre-reinforced sheaves that deliver an exceptional strength-to-weight ratio. In practice this means they run with...
Ronstan Series 40 Orbit Blocks are high-load sailboat blocks with maximum working loads from 400 kg up to 1000 kg (HHL versions), built around a lightweight glass-fiber-reinforced nylon body and a two-stage...
The Ronstan Series 55 Orbit Ratchet is a 55 mm ratchet block offering both automatic and manual engagement modes, up to 20:1 holding power, and a lightweight 82 g build. Built...