Description
Harken 57-75mm Black Magic Air Lock-Off Footblocks are used to redirect lines on the deck.
- Additionally, Foot-blocks with lock-offs temporarily secure sheets.
- Either metric or imperial flathead fasteners may be used for mounting and are not exposed.
- Side-plates and sheaves Hard Lube anodised for maximum UV protection and a smooth surface.
- Centre cage keeps Torlon® roller bearings separated and parallel to reduce friction.
- Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.
| Sku | Name | Sheave Ø mm (in) | Length mm (in) | Weight g (oz) | Maximum line Ø mm (in) | Maximum working load kg (lb) | Breaking load kg (lb) | Height mm (in) | Number of fasteners | Fasteners mm (in) | A mm (in) | B mm (in) | C mm (in) | D mm (in) | E mm (in) | F mm (in) | G mm (in) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3221 | 57 mm Black Magic Air Aluminium Footblock — Lockoff | 57 (2 1/4) | 84 (3 5/16) | 154 (5.44) | 12 (7/16) | 1134 (2500) | 2268 (5000) | 25 (1) | 4 | 6 FH (1/4 FH) | 9.5 (3/8) | 22.5 (7/8) | 51.5 (2 1/32) | 16 (5/8) | 59 (2 5/16) | 84 (3 5/16) | 13 (1/2) |
| 3236 | 75 mm Black Magic Air Aluminium Footblock — Lockoff | 75 (2 15/16) | 111 (4 3/8) | 320 (11.28) | 14 (9/16) | 2380 (5250) | 4762 (10500) | 32 (1 1/4) | 4 | 8 FH (5/16 FH) | 11.5 (15/32) | 28.5 (1 1/8) | 70.5 (2 3/4) | 21 (13/16) | 77 (3) | 110 (4 5/16) | 17 (21/32) |
