HARKEN SINGLE RUNNER BLOCK BECKET 100MM

Black Magic Runner Blocks are used on running backstays of offshore boats to adjust mast bend for different wind conditions.

Integrated sideplate bails and recessed cotter key help produce a smooth design that won’t snag lifelines.

Sideplates and sheaves Hard Lube-anodized for maximum UV protection and a smooth surface. Center cage keeps Torlon® roller bearings separated and parallel to reduce friction.

Sheave Ø (mm)
100 mm

Sheave Ø (in)
3 15/16 in

Length (mm)
193 mm

Length (in)
7 9/16 in

Weight (g)
542 g

Weight (oz)
19.12 oz

Clevis pin Ø (mm)
15.9 mm

Clevis pin Ø (in)
5/8 in

Maximum line Ø (mm)
16 mm

Maximum line Ø (in)
5/8 in

Maximum working load (kg)
3402 kg

Maximum working load (lb)
7500 lb

Breaking load (kg)
6802 kg

Breaking load (lb)
15000 lb