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Harken 150mm Aluminum Stud Mastbase Block
Product Description
Harken 150mm 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 : 5 15/16" (150mm)
- Weigh: 11.29 lbs. (5.12 kg)
- Maximum line Ø: 1" (25mm)
- Maximum working load: 22,050 lbs. (10,000 kg)
- Breaking load: 44,100 lbs. (20,000 kg)
$7,764.21
Harken 150mm Aluminum Stud Mastbase Block—
$7,764.21

Description
Product Description
Harken 150mm 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 : 5 15/16" (150mm)
- Weigh: 11.29 lbs. (5.12 kg)
- Maximum line Ø: 1" (25mm)
- Maximum working load: 22,050 lbs. (10,000 kg)
- Breaking load: 44,100 lbs. (20,000 kg)













