Ronstan Series 75 BB Block, TripleLow friction, 2-stage ball bearing system
High static and dynamic load capacity
Cheek cut-outs for easy bearing maintenance
Lockable swivelling head post
High strength forged shackle
Sheave Ø 3 in.
Max. Rope Ø 1/2 in.
Max. Cable Ø --
Pin Ø 9/32 in.
M.W.L. 2760 lb.
B. L. 5510 lb.
Weight 22.3 oz.
Blocks can be disassembled for servicing or customization.Head can be locked at 0° or 90° by engaging the grub screw in either the 0 or 90 degree position.
Mainsheet sheets on boats to 11m (36 ft)
Various control line applications on larger yachts
Carbon black Acetal ball bearings
U.V. stabilized Acetal sheaves
Grade 316 stainless steel forged shackle
Grade 316 stainless steel bearing liner