100MM BLACK MAGIC RUNNER BLOCKS
Black Magic Runner Blocks are used on running backstays of offshore boats to adjust mast bend for different wind conditions.
Integrated side plate 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
Length (mm)
157 mm
Weight (g)
480 g
Clevis pin Ø (mm)
15.9 mm
Maximum line Ø (mm)
16 mm
Maximum working load (kg)
3402 kg
Breaking load (kg)
6802 kg