Ball Bearing Blocks

Blocks with rolling elements are an engineering development of the plain bearing block.

Ball Bearing Blocks are ideal for running rigging applications where the line needs to run fast through the system and where the line needs constant fine tuning adjustment under load e.g. racing sheets - "release, pump, tension, release, pump, tension"

Ball Bearings in blocks are designed to rotate freely and can be identified by the fantastic whizzing sound they make when they are spun by hand under no load.

Ball Bearings are a set of multiple, relatively small diameter, spherical balls encapsulated in a ball 'race or cage' between the sheave and the rotating axle. The inner and outer ball race holds the balls captive and allows them to roll so freely that they are as close as you can get to frictionless. The hardened, round surfaces of the spherical balls can handle both radial and thrust loads. The minimal contact surface area between the small spherical balls is the reason for their negligible resistance to movement. However, because the load bearing surface is also low, ball bearings are susceptible to distortion when subjected to heavy force.

The picture shows a Harken ball bearing block, a ball bearing and a Selden ball bearing block.

Ball Bearing Blocks

Ball bearing block features:

Virtually frictionless sheave rotation for free running lines
Outstanding response under dynamic loads
Ultimate performance and functionality for racing
Suitable for rapid release and continual tuning
Excellent durability with Delrin/Torlon ball bearings

Parts of a Yacht Rigging Block, traditional and modern

Block Parts Block Parts - Barton

Holt Dynamic Blocks Barton Ball Bearing Blocks Selden Ball Bearing Blocks Harken Ball Bearing Blocks

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Harken 57mm Fiddle Carbo AirBlocks

£66.00

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Harken 57mm Carbo Air Blocks

£54.00

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Harken 75mm Carbo Air Blocks

£98.00

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 38mm Line or Wire High Strength Blocks

£74.00

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 75mm Carbo Fiddle Air Blocks

£121.00

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Selden Ball Bearing Block 30mm BBB30

£29.00

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Selden Ball Bearing Block 40mm BBB40

£36.00

Selden High Load Ball Bearing 402-201-04

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Selden High Load Ball Bearing Block 25mm HLBBB25

£32.50

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Selden 45mm Autoratchet Block

£74.00

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Holt 20mm Dynamic Blocks

£12.60

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The Meadows

Beer

Seaton

Devon

EX12 3ES

01297 20744

sales@jimmygreen.co.uk

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Ball Bearing Blocks