mouseover to enlarge

100 mm Black Magic

100 mm Aluminum Block — Swivel, Becket

Part No. 3247
$730.90  Not available on-line. Please contact your Harken dealer.
Sheave Ø (mm)100 mm
Sheave Ø (in)3 15/16 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

Black Magic Air blocks are a top favorite of Big Boat performance racers and cruisers. These lightweight, free-running, powerful performers are used for sail controls that see lots of action: mainsheet, runner, halyard, and spinnaker systems. A center cage keeps Torlon® roller bearings separated and parallel to reduce friction. Shackle blocks lock in two directions or swivel to keep line from twisting.

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

Sheave Ø (mm)100 mm
Sheave Ø (in)3 15/16 in
Length (mm)241 mm
Length (in)9 1/2 in
Weight (g)675 g
Weight (oz)23.82 oz
Shackle pin Ø (mm)10 mm
Shackle pin Ø (in)3/8 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)6804 kg
Breaking load (lb)15000 lb
DWG: 3247.DWG (open/save)
DXF: 3247.DXF (open/save)
IGS: 3247.IGS (open/save)
EPS: 3247.eps (open/save)
High-res JPG: 3247.jpg (open/save)
  • United States
  • Australia
  • France
  • Italia
  • New Zealand
  • Polska
  • Sverige
  • UK