Harken: Black Magic Loop Block Series

About Harken
America’s Cup Trickles Down to Everyday Sailing
With Black Magic^® Loop Block Series

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Black Magic^® Loop Blocks

Harken 75 mm Single Loop Block #3196

Pewaukee, Wisconsin—America’s Cup technology is incorporated into Harken’s Black Magic® block line with the introduction of the Loop block series. This block features a soft loop attachment, which is an attachment concept that has come directly from America’s Cup and Grand Prix racing. The soft loop is loaded on a closed bail in the center of the sheave and is the structural component that takes the primary load. Other advantages include weight and noise reduction.

The soft loop attachment allows the block to articulate for a fair lead ensuring the block’s bearing system is operating at top efficiency. Sculpted sideplates and unique captive lashing system prevents the block from capsizing during intermittent loading situations.

“The technology of the America’s Cup continuously raises the bar for hardware design,” commented Dan Rondeau, new products manager. “The Black Magic^® Loop Series is the latest innovation to trickle down from the Cup and benefit all Big Boat sailors.”

Black Magic^® Loop blocks are available in four sizes; 57 mm, 75 mm, 100 mm, and 125 mm. All blocks are made of strong, lightweight sculpted 6061-T6 aluminum that has been CNC-machined to remove excess weight. The thin-profile, deep-groove aluminum sheave has radiused edges to protect high-tech line. Sheaves and sideplates are deep-saturation Hardkote-anodized and UV-stabilized with black additive for maximum protection. The Torlon^® roller bearings are housed in a center cage and separated to provide less friction, greater strength and reduced wear.

3195
57 mm Single Loop Block
Sheave dia: 57 mm
Block length wo/ loop: 3 in (76 mm)
Weight wo/loop: 3.25 oz (92 g)
Max. line dia: 7/16 in (12 mm)
Max. working load: 2500 lb (1134 kg)
Breaking load: 5000 lb (2268 kg)

3196
75 mm Single Loop Block
Sheave dia: 75 mm
Block length wo/ loop: 3 15/16 in (100 mm)
Weight wo/loop: 7.27 oz (206 g)
Max line dia: 9/16 in (14 mm)
Max. working load: 5000 lb (2268 kg)
Breaking load: 10000 lb (4536 kg)

3199
100 mm Single Loop Block
Sheave dia: 100 mm
Block length wo/ loop: 5 1/16 in (128 mm)
Weight wo/loop: 13.06 oz (370 g)
Max line dia: 5/8 in (16 mm)
Max. working load: 7500 lb (3402 kg)
Breaking load: 15000 lb (6804 kg)