Harken 57mm Black Magic Blocks
Harken 57mm Black Magic 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.
Black Magic blocks have a modular parts system allowing majority of the parts to be serviced and replaced. Side plates, ball bearings, head posts etc are all replaceable. Just remove the 3 allen bolts and the side plate to service. We have seen these blocks in great condition on 15 year old boats!
- Mainsheet systems
- Mast Base Blocks
- Sheet Blocks
- Downhaul systems
To talk to us about a custom Harken hardware package call us on +442381 550 059 or email info@oceanrope.com
| Block Type | Break Load | SWL | Line Size |
| Low Load Single Swivel | 1500kg | 750kg | 12mm |
| Low Load Single Swivel + Becket | 1500kg | 750kg | 12mm |
| Low Load Double | 1500kg | 750kg | 12mm |
| Single Swivel | 2268kg | 1134kg | 12mm |
| Single Swivel + Becket | 2268kg | 1134kg | 12mm |
| Double Swivel | 3267kg | 1633kg | 12mm |
| Triple Swivel | 4400kg | 2200kg | 12mm |
| Stand up | 2268kg | 1134kg | 12mm |
| Loop Block | 2268kg | 1134kg | 12mm |
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