Block, ball raced, micro - 4 mm sheave

Block, ball raced, micro - 4 mm sheave. SAILSetc design and manufacture. A beautifully simple design of block for lines up to 0.4 mm Ø;.

4 mm sheave, 8.5 mm long, 5.5 mm wide, 4 mm thick, 1.0 mm Ø fastener holes.

Suitable for use with the main winch loop system on Footy and smaller boats. Useful for other applications on miniature craft.

Intended to be used with 5 to 15 kg BS Dyneema. Designed to be used suspended on 15 or 25 kg BS Dyneema line.

For boats up to Footy size use the 61-004. For boats up to 65 Class use 061-006. For boats up to the IOM, M and 10R use 61-008 or 61-010. For boats as large as an A Class use 061-013. 

NB When suspending the block on a line it is important that the line passes through both holes in the block in the way shown in the thumbnail sketches above.

Replacement bearings - choose BF-061-004 from the SPARES section of this website.

Maintenance of the bearings used in this product is describedhere.

Downloadable document: Rigging Guide