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Harken 125mm Aluminum Stud Mastbase Block
Product Description
Harken 125mm Aluminum Stud Mastbase Block
Sideplates are constructed of hardcoat-anodized 6061-T6 aluminum for strength and corrosion resistance. The ultralight composite bearing system (ULC) rides on a heat-treated stainless steel inner race to handle extremely high loads.
Specifications:
- Sheave Ø : 4 15/16" (125mm)
- Weigh: 7.4 lbs. (3.36 kg)
- Maximum line Ø: 3/4" (19mm)
- Maximum working load: 15,435 lbs. (7,000 kg)
- Breaking load: 30,870 lbs. (14,000 kg)
$5,759.80
Harken 125mm Aluminum Stud Mastbase Block—
$5,759.80

Description
Product Description
Harken 125mm Aluminum Stud Mastbase Block
Sideplates are constructed of hardcoat-anodized 6061-T6 aluminum for strength and corrosion resistance. The ultralight composite bearing system (ULC) rides on a heat-treated stainless steel inner race to handle extremely high loads.
Specifications:
- Sheave Ø : 4 15/16" (125mm)
- Weigh: 7.4 lbs. (3.36 kg)
- Maximum line Ø: 3/4" (19mm)
- Maximum working load: 15,435 lbs. (7,000 kg)
- Breaking load: 30,870 lbs. (14,000 kg)













