mouseover to enlarge
100 mm Aluminum Double Footblock 100 mm Aluminum Double Footblock 100 mm Aluminum Double Footblock
click thumbnail to select

Black Magic Footblocks

100 mm Aluminum Double Footblock

Part No. 3250
$930.70  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)2250 kg
Maximum working load (lb)4950 lb

Carrying some of the highest loads imposed by running rigging, these strong, lightweight blocks feature Torlon® roller bearings housed in a center cage. Rollers stay parallel for low-friction efficiency. Sculpted hardcoat-anodized aluminum sideplates protect sideload ball bearings. Dissimilar metals are isolated to minimize corrosion. Blocks are easily disassembled with a single hex wrench.

Either metric or imperial flathead fasteners may be used for mounting and are not exposed.

Torlon is a registered trademark of Solvay Advanced Polymers.

Sheave Ø (mm)100 mm
Sheave Ø (in)3 15/16 in
Length (mm)143 mm
Length (in)5 5/8 in
Height (mm)62 mm
Height (in)2 7/16 in
Weight (g)967 g
Weight (oz)34.1 oz
Maximum line Ø (mm)16 mm
Maximum line Ø (in)5/8 in
Maximum working load (kg)2250 kg
Maximum working load (lb)4950 lb
Breaking load (kg)4500 kg
Breaking load (lb)9900 lb
Number of fasteners
Fasteners (mm)10 FH mm
Fasteners (in)3/8 FH in
A (mm)11 mm
A (in)7/16 in
B (mm)38 mm
B (in)1 1/2 in
C (mm)93 mm
C (in)3 5/8 in
D (mm)28 mm
D (in)1 1/8 in
E (mm)100 mm
E (in)3 15/16 in
F (mm)143 mm
F (in)5 5/8 in
G (mm)21 mm
G (in)13/16 in
Manual: 4546.pdf (open/save)
Manual: 4345.pdf (open/save)
Manual: 4335.pdf (open/save)
DWG: 3250.DWG (open/save)
DXF: 3250.DXF (open/save)
IGS: 3250.IGS (open/save)
EPS: 3250.eps (open/save)
High-res JPG: 3250.jpg (open/save)
  • United States
  • Australia
  • France
  • Italia
  • New Zealand
  • Polska
  • Sverige
  • UK