The Barton Size 3 45mm plain bearing pulley block with swivel and becket is a compact sailing block designed for mainsheets vangs and lead blocks on dinghies dayboats and lightweight cruisers. Its primary benefit is a strong low-weight purchase point that fits up to 10mm rope.

If your boat needs a durable low-maintenance block that saves weight without sacrificing strength this plain bearing block offers a practical solution. It reduces complexity compared to ball-bearing blocks while providing reliable load handling for common onboard tasks.

• 45mm Acetal sheave 13mm thickness compatible with up to 10mm (3/8") rope
• Stainless steel swivel frame with becket for secure attachment and lead adjustment
• 30% glass-filled nylon body reduces weight to 91 g while maintaining strength
• Safe Working Load (SWL) 400 kg and break load 800 kg — quantifiable load ratings
• Compact dimensions 114 x 47 x 28 mm for space-constrained installations

Compared to ball bearing blocks this plain bearing model is simpler to maintain and better suited to infrequent high-load or low-maintenance applications where slightly higher friction is acceptable. Use it as a mainsheet block vang or fixed lead block on small craft; it integrates with common deck fittings and control lines.

Materials and specifications are manufacturer-stated: Acetal sheave 30% glass-filled nylon frame stainless steel hardware. Manufacturer Barton Marine part number N03131. Weight 91 g Sheave size 45mm x 13mm SWL 400kg Break load 800kg. Learn more today or contact Anchor Express for fitment advice.