Ratchet Blocks

Two Speed Mainsheet Systems

FEATURES

Coarse and and fine tuning purchase system
Unrivalled 18:1 holding power
Dual sided On-Off switch
Low friction ball bearing system
Lightweight
Cheek cut-outs for easy bearing maintenance

Product No.	Desc.	Sheave Ø	Max. Rope Ø	Max. Cable Ø	Pin Ø	M.W.L.	B. L.	Weight
		mm	mm	mm	mm	kg	kg	g
RF72700	3:1 coarse, 6:1 fine, Ratchet and Ball Bearing	75 + 50	10	-	-	800	1700	1490
RF72700B	Bottom blocks for RF72700 two-speed system	75 + 50	10	-	-	800	1700	950
RF72700T	Top blocks for RF72700 two-speed system	75 + 50	10	-	-	800	1700	560
RF72900	4:1 coarse, 8:1 fine, Ratchet and Ball Bearing	75 + 50	10	-	-	1100	2300	1610
RF72900B	Bottom blocks for RF72900 two-speed system	75 + 50	10	-	-	1100	2300	1035
RF72900T	Top blocks for RF72900 two-speed system	75 + 50	10	-	-	1100	2300	575

RANGE INFORMATION

Two-speed mainsheet systems allow both coarse and fine tuning in a single purchase system. The system allows fine tuning of the mainsheet when sailing upwind by using one of the sheet tails and keeping the other cleated. Using both the sheets at once allows the trimmer to blow off the main quickly when rounding the top mark and trim on quickly when hardening up after rounding the bottom mark. When fitting to traveller cars, ensure adequate support for the bottom block and use stand-up spring kit RF324-1 or RF324-2. (Refer to traveller section for more information).

APPLICATIONS

Two-Speed systems: Mainsheets on sportsboats and keel boats to 12m (40ft)

MATERIALS

Carbon Black Acetal ball bearings
U.V. stabilised Acetal sheaves, alloy ratchet sheaves
Cheek plates: Anodised aluminium
Torlon® ratchet pawl
Adjustable cleat arms