Ronstan Series 30 Stand Up Swivel Ball Bearing Block

The Ronstan Series 30 Ball Bearing Orbit Block is engineered for high performance with a superior strength-to-weight ratio. Utilizing advanced composite materials, this block is designed to minimize friction while maintaining a lightweight structure. Featuring multiple attachment options and precision bearings, it is perfect for a variety of marine applications.

Applications:

• Ideal for mainsheet and spinnaker systems on dinghies up to 5M (16')
• Suitable for halyard, vang, and backstay applications on vessels up to 5M (16')
• Effective for control line applications 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")
• M.W.L.: 300kg (660lbs)
• B. L.: 600kg (1,320lbs)
• Weight: 33g (1.2oz)