Harken 57 mm Black MagicŪ High-load Single/lockoff footblock Cat. No. HAR 3221 Weight 1 lbs
$214.51
1967 57 mm High-load Foot Block w/Lockoff
Black Magic® footblocks carry some of the highest loads imposed by
running rigging. The Torlon® rollers on these lightweight,
free-running
blocks are housed in a center cage, with no contact between bearings.
UV-resistant, carbon-black Delrin® balls handle sideloads.
Either metric or imperial flathead fasteners may be used for mounting
and are not exposed.
Use for:
Genoas
Spinnakers
Description
Single hi-load/lockoff*
Sheave
dia. (in)
2 1/4
Length
(in)
3 5/16
Height
(in)
1
Weight
(oz)
5.3
Line
dia. - max. (in)
7/16
SWL
(lb)
2500
Breaking
strength (lb)
5000
Fasteners
(FH) (in)
4 x 1/4
A (in)
3/8
B (in)
15/16
C (in)
2 1/16
D (in)
5/8
E (in)
2 3/8
F (in)
3 5/16
G (in)
1/2
*Lockoffs are intended to hold
lines temporarily and should not be used in place of line stoppers or
clutches
