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Harken 57mm Black Magic Blocks

Harken 57mm Black Magic - Low Load - Single

Sheave Diameter: 57mm

Caged Torlon® Roller Bearings - maintaining separation and parallel alignment to minimise friction

Captive Delrin® ball bearings carry any side-loading

Hard-lube anodised 6061-T6 aluminium sculpted side plates and sheaves

Triple Function Set Screw Shackle Head

Black Magic Air Blocks are powerful performers suited to hard-working sail controls

£201.00

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Features

Harken Black Magic Air blocks are lightweight, free-running, powerful performers ideally suited to hard-working sail controls, e.g. mainsheet, runners, halyards or Spinnaker systems sheets and guys.

Harken 57mm Black Magic Air Blocks: Facts, Features and Plus Factors

  • Sheave Diameter: 45mm
  • Low-friction efficiency for fast, accurate trim and release
  • The Centre cage keeps the Torlon® roller bearings separated and parallel to reduce friction.
  • Captive Delrin® ball bearings carry side loads
  • High-strength, lightweight aluminium sheaves and side plates, CNC sculpted for optimum load capacity to weight ratio
  • Excellent durability: sun and salt-resistant
  • Smooth finish, hard-lube anodised 6061-T6 aluminium side plates, and sheaves deliver maximum UV protection 
  • Dissimilar metals are isolated to prevent corrosion caused by galvanic reaction
  • Triple Function three-way Set Screw Shackle Head
  • Shackle Head options: 360-degree swivel rotation to alleviate rope twist, fixed in line or fixed at 90 degrees 
  • Soft-Attach options: patented loop or lash through the middle of the sheave instead of the head.
  • The primary load is carried by the centre of the sheave for weight efficiency and compactness
  • Patented Soft-Attach Loop blocks: removable dead-end post for attachment to a pad eye
  • Easy maintenance: quick disassembly with a hex spanner - minimum fastenings with no loose balls or rollers
Harken Sheave Ø Block Configuration MBL MWL Maximum Line Ø Weight
3226 57mm Single, swivel 1500kg 750kg 12mm 142g
3229 57mm Single, swivel, becket 1500kg 750kg 12mm 155g
3228 57mm Double, swivel 2500kg 1250kg 12mm 286g
3219 57mm Triple, swivel 4400kg 2200kg 12mm 375g
3215 57mm High-load, single, swivel 2268kg 1134kg 12mm 142g
3216 57mm High-load, single, swivel, becket 2268kg 1134kg 12mm 155g
3217 57mm High-load, double, swivel 3267kg 1633kg 12mm 286g
3218 57mm High-load, double, swivel, becket 3267kg 1633kg 12mm 302g
3227 57mm High-load, stand-up 2268kg 1134kg 12mm 210g
3214 57mm Single, Loop 2268kg 1134kg 12mm 92g

MBL = Harken Manufacturer Break Load

MWL = Harken Maximum Working Load

Ø = diameter

  • Block Size - 57 mm