CW55173 - Ronstan Series 30 Ball Bearing Orbit Block™ - Single - Becket - Swivel Shackle Head

• Lightweight
  
• Highest working load in its class
  
• Secure, versatile and secure attachement
  
• Low profile and compact
  
• Ultra low profile thru-sheave becket
  
• Low friction 2-stage ball bearing system provides consistent performance over the full working load range

• Mainsheet systems and spinnaker sheets on dinghies to 5M(16')
  
• Halyard, vang and backstay applications on boats to 5M(16')
  
• Control line applications on larger yachts

• 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®

The Ronstan Series 30 Ball Bearing Orbit Block� (part number CW55173) is a single block with a becket and swivel shackle head, designed for managing lines in marine applications. This component is suitable for IT buyers procuring hardware for specialized marine or industrial systems requiring efficient load management and precise line control. Its construction utilizes composite reinforced polymer materials, including a high compression strength carbon black Acetal sheave and Acetal ball bearings, within a glass fiber reinforced Nylon frame. The block's design prioritizes a high strength-to-weight ratio and low friction, achieved through a 2-stage ball bearing system. It is engineered for consistent performance across its working load range, addressing the need for reliable and compact line management solutions in environments where space and weight are considerations. The block is rated for a Maximum Working Load (M.W.L.) of 300kg (660lbs) and accommodates ropes up to 8mm (5/16") in diameter.