Harken Ball Bearing Blocks

Harken is universally acknowledged as the global leader in the development of performance blocks featuring ball bearings manufactured in 316 Stainless Steel, UV-stabilised Delrin Acetal Resin and the hardest, smoothest of them all: Zirconium/Ceramic, seven and a half times stronger in compression than stainless bearings.

Harken Ball Bearing Blocks: Material Facts and Features

Harken Stainless Steel Ball Bearings

316 Stainless Steel: high corrosion resistance in freshwater and saltwater but cannot be hardened
17-4 PH Stainless Steel: more corrosion-resistant than 316 stainless steels, hardened to extremely high strength, excellent for, e.g. gears and gearing
XM-19 Stainless Steel: high alloy content, high mechanical strength and superior corrosion resistance, excellent for, e.g. rods and pins in Harken cylinders

Harken Delrin® Acetal Resin Ball Bearings

Black, UV-stabilised, durable
Excellent for ball bearings, sheaves, and side plates.

Harken Torlon® Thermoplastic Ball Bearings

High strength, crush, shock load and impact-resistant
Hard-working for extended heavy duty,
Greenish-brown colour
Excellent for Harken extreme loading blocks and ancillary hardware

Harken Zirconium Ball Bearings, also commonly known as Ceramic

Zircon bearings are the ultimate in hardness and smoothness
Zircon bearings are approximately seven and a half times stronger in compression than stainless bearings, size for size.
Ceramic/Zircon bearings are the ultimate in low friction efficiency, absorbing far less energy before they begin to roll.

Harken Ball Bearings: from left to right in the photo below = Delrin, Torlon and Zirconium

Harken Ball Bearings

Harken UV-Stabilising

Sunlight causes composites to become brittle, lose strength and discolour by breaking their chemical bonds
Harken composite side plates, sheaves and bearings undergo a Carbon Black UV stabilising process for extended working life

Harken Hard-Coat Anodising

Hard-Coat aluminium anodising is an electrochemical process that results in a corrosion-resistant finish with a hardness second only to diamonds
The Harken Hard-Coating process is double the thickness compared with black anodising, providing extra protection against surface damage and corrosion

Harken Hard-Coat Anodising compared with Clear Harken Hard-coat Anodising Chart

Harken Hard-Lube Anodising

Hard Lube-anodised aluminium has the same corrosion resistance as Hard-Coating with a PTFE coating for an even smoother, reduced-friction finish

Harken Carbon Black Process

Carbon black is a UV-stabilising colour additive applied to Delrin ball bearings, sheaves, and side plates to enhance resistance to the sun’s damaging rays

Harken Information on Block Loading Relative to the Angle of Deflection

The loading on a block is a combination of the load on the line plus a deflection loading factor, which is determined by the turning angle.

For example, a 180-degree turn will result in twice the load on the line being applied to the block.

While a 30 degree deflection will only transfer 52 percent of the load on the line to the block.

Harken Deflection Angle Block Loading

Harken Block Loading Relative to the Angle of Deflection
Angle of Deflection	30°	45°	60°	75°	90°	105°	120°	135°	150°	160°	180°
Load Factor	52%	76%	100%	122%	141%	159%	173%	185%	193%	197%	200%

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Harken 16mm Blocks

£17.00

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Harken Micro Blocks - 22mm Sheave

£15.00

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Harken 18mm Fly Soft Attach Blocks

£26.00

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Harken 29mm Carbo Air Blocks

£17.00

Harken 29mm Carbo Air Blocks - T2 - soft-attach

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Harken 29mm T2 Soft Attach Blocks

£29.00

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Harken 40mm Carbo Air Blocks

£31.00

Harken 40mm T2 Soft Attach Carbo Air Block - single sheave

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Harken 40mm T2 Soft Attach Carbo Air Blocks - Dyneema Loop

£48.00

Harken 40mm Carbo Air Blocks - T2 - Soft Attach

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Harken 40mm T2 Soft Attach Carbo Air Blocks - Tie-On

£43.00

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Harken 40mm Carbo Fiddle Air Blocks

£52.00

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Harken 57mm Carbo Air Blocks

£54.00

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Harken 57mm Fiddle Carbo AirBlocks

£66.00

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Harken 75mm Carbo Air Blocks

£98.00

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The Meadows

Beer

Seaton

Devon

EX12 3ES

01297 20744

sales@jimmygreen.co.uk

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Harken Ball Bearing Blocks

Harken Ball Bearing Blocks: Material Facts and Features

Harken Stainless Steel Ball Bearings

Harken Delrin® Acetal Resin Ball Bearings

Harken Torlon® Thermoplastic Ball Bearings

Harken Zirconium Ball Bearings, also commonly known as Ceramic

Harken UV-Stabilising

Harken Hard-Coat Anodising

Harken Hard-Lube Anodising

Harken Carbon Black Process

Harken Information on Block Loading Relative to the Angle of Deflection