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125 mm Runner Block 125 mm Runner Block
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125 mm Black Magic

125 mm Runner Block

Part No. 3259
$1,003.90  Not available on-line. Please contact your Harken dealer.
Sheave Ø (mm)125 mm
Sheave Ø (in)4 15/16 in
Maximum line Ø (mm)19 mm
Maximum line Ø (in)3/4 in
Maximum working load (kg)4990 kg
Maximum working load (lb)11000 lb

Runners 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.

Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.

Sheave Ø (mm)125 mm
Sheave Ø (in)4 15/16 in
Length (mm)195 mm
Length (in)7 11/16 in
Width (mm)183.5 mm
Width (in)7 7/32 in
Weight (g)844 g
Weight (oz)29.76 oz
Clevis pin Ø (mm)19 mm
Clevis pin Ø (in)3/4 in
Maximum line Ø (mm)19 mm
Maximum line Ø (in)3/4 in
Maximum working load (kg)4990 kg
Maximum working load (lb)11000 lb
Breaking load (kg)9980 kg
Breaking load (lb)22000 lb
DWG: 3259.DWG (open/save)
DXF: 3259.DXF (open/save)
IGS: 3259.IGS (open/save)
EPS: 3259.eps (open/save)
High-res JPG: 3259.jpg (open/save)
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