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The 3173 and 3174 high-load controls are designed for offshore boats with mainsails exceeding 37 m² (400 ft²). These controls support purchase ratios ranging from 2:1 to 6:1. They are engineered to handle the significant loads associated with large mainsails on offshore vessels.
Sheaves: 57 mm Black Magic Big Boat ball/roller sheaves.
Sideplates: High-load aluminum sideplates.
Specifications
• Brand: Harken
• Reference: 3174
• Sheave Ø: 57 mm
• Length: 164 mm
• Width: 57 mm
• Maximum line Ø: 12 mm
• Maximum working load: 750 kg
• Breaking load: 1500 kg
• Height above track: 49 mm
• Weight for pair: 1169 g
• Purchase: 3:1 / 4:1
