Big Boat sheaves are available for special applications as well as for replacement sheaves in Big Boat blocks. Made of hardcoat-anodized, PTFE-impregnated 6061-T6 aluminum, sheaves feature Torlon® rollers to carry high radial loads and carbon-black Delrin® balls to support sideloads and provide UV protection.

Delrin® is a registered trademark of E. I. du Pont de Nemours and Company or its affiliates.
Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.

Sheave Ø (mm)
114 mm

Sheave Ø (in)
4 1/2 in

Width (mm)
41 mm

Width (in)
1 5/8 in

Weight (g)
709 g

Weight (oz)
25 oz

Center pin Ø (mm)
19.1 mm

Center pin Ø (in)
3/4 in

Fasteners (mm)
10 mm

Fasteners (in)
3/8 in

Maximum line Ø (mm)
18 mm

Maximum line Ø (in)
7/8 in

Maximum working load (kg)
6736 kg

Maximum working load (lb)
14850 lb

Breaking load (kg)
13472 kg

Breaking load (lb)
29700 lb