Skip to content Skip to navigation menu
Live Chat
Video

RONSTAN
Series 40 Orbit Single Block with Becket

$27.95

Model # 11075355 | Mfg # RF45110
In stock online.

Series 40 Ball Bearing Blocks are suitable for sheet applications on dinghies, sportboats and small one-design keelboats, and for control lines on larger boats. They feature a precision two-stage bearing system for better durability, lighter weight and low-friction performance. Models with swivels feature stainless steel shackles. 

  • Sheave: Carbon fiber reinforced, PTFE impregnated engineered nylon
  • Ball bearings: High-compression-strength carbon black acetal; Stage 2 bearing: Glass-fiber-reinforced MoS2 impregnated engineered nylon
  • Cheek material/finish: Toughened glass-fiber-reinforced nylon

Series 40 Orbit Single Block with Becket

Becket Becket
Diameter 5/16 Inch or 8 mm
Direction Any
Integral Cleat No Integral Cleat
Mount Type Swivel Shackle
Ratchet Non Ratcheting
Safe Working Load 715 Pounds
Sheave Diameter 1 9/16 Inches or 40 mm
Type Single
Weight 1.3 Ounces

West Advisor

The West Advisor articles have answered boaters' questions and provided solutions to boating problems for more than 20 years. West Marine has compiled one of the Web's most comprehensive collections of technical boating information articles.