b'Big Boat SheavesBig Boat sheaves are available for special applications as well as for replacement sheaves in Big Boat blocks. Made of Hard Lube-anodized, 6061-T6 aluminum, sheaves feature Torlon rollers to carry high radial loads and carbon-black Delrin ball bearings to support sideloads and provide UV-protection. Select sheaves based on load-carrying capability.Installation requires clamping or securing inner race.Use for: Torlon roller/ball bearing systemMainsheets Hard Lube-anodizedSpinnaker sheets 6061-T6 aluminumAfterguy/foreguyFootblocks Carbon-black balls for UV-protectionXp 55, X-YachtsX-Yachts5006031539518519520 657 550Sheave Center pin Fastener Max line Maximum BreakingPartWidth WeightFasteners circleworking load loadNo. in mm in mm oz g in mm in mm in mm in mm lb kg lb kg5003767/82261703/8103/8109/161449502245990044905184 1/2114125164543/419.13/8101 3/8353/418750034011500068035191401 1/829277657/822.283/8101 5/8417/82291004127182008254 5 1/2 1 1/2 52071781 1/829451280381/2122 1/2647/8221400063492800012698 55041027/822102843/8103/8109/161449502245990044906033761 9/1640102843/8103/8103/41849502245990044906574 1/21141 5/841257093/419.13/8101 3/8357/818148506736297001347215392 1/2641 3/83571985/168.15/1681/2123000136160002721Delrin 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. 75'