Ronstan Series 30 Triple Ball Bearing Block with Becket

The Series 30 Ball Bearing Orbit Block is engineered with a unique design to deliver the highest strength-to-weight ratio in its category. Utilizing all-composite reinforced polymer materials, these blocks offer various attachment options and minimize friction through an optimal number of ball bearings. The fiber-reinforced composites used in the construction reduce weight while maintaining durability.

Applications:

• Performance mainsheet systems and spinnaker sheets on dinghies up to 5M (16')
• Halyard, vang, and backstay uses on vessels up to 5M (16')
• Control line systems on larger yachts

Materials:

• Sheave: High compression strength carbon black Acetal
• Ball Bearings: High compression strength Acetal
• Frame/Cheeks: Toughened, glass fiber reinforced Nylon
• Link: UV stabilized, multi-strand impregnated SK75 Dyneema®

Specifications:

• Sheave Ø: 30mm (1-3/16")
• Max. Rope Ø: 8mm (5/16")
• Maximum Working Load: 550kg (1,210lbs)
• Burst Load: 1,100kg (2,430lbs)
• Weight: 75g (2.6oz)

• Extremely lightweight design
• High working load limit for strength
• Versatile attachment options
• Compact and low-profile construction