![Ronstan Series 40 Orbit BB Sheave [RF48000]](https://www.greathardwarehub.com/wp-content/uploads/2026/09/ronstan-series-40-orbit-bb-sheave-rf48000.webp)
Series 40 Orbit BB Sheave
Ball Bearing versions incorporate the 2-stage bearing system using ball bearings to minimize friction and a secondary full-contact bearing to maintain low friction across the full working load range.
Specifications:
- Sheave
- Captive BB
- Width: 15.5mm/5/8″
- Sheave Diameter: 40mm/1-9/16″
- Maximum Rope: 10mm/3/8″
- M.W.L.: 400kg/880lbs
- Weight: 30g/1.1oz
![Harken 16mm Block w/Becket [405]](https://www.greathardwarehub.com/wp-content/uploads/2026/09/harken-16mm-block-w-becket-405.webp)
![Harken 29mm Triple Carbo Air Block w/Swivel [344]](https://www.greathardwarehub.com/wp-content/uploads/2026/09/harken-29mm-triple-carbo-air-block-w-swivel-344.webp)
![Harken 16mm Block [404]](https://www.greathardwarehub.com/wp-content/uploads/2026/09/harken-16mm-block-404.webp)
![Harken 57mm Carbo Air Block w/Swivel [2600]](https://www.greathardwarehub.com/wp-content/uploads/2026/09/harken-57mm-carbo-air-block-w-swivel-2600.webp)
![Harken 22mm Double Micro Block w/Becket [227]](https://www.greathardwarehub.com/wp-content/uploads/2026/09/harken-22mm-double-micro-block-w-becket-227.webp)
![Harken 40mm Carbo Air Fiddle Block w/Swivel Becket [2656]](https://www.greathardwarehub.com/wp-content/uploads/2026/09/harken-40mm-carbo-air-fiddle-block-w-swivel-becket-2656.webp)
![Harken 16mm Forkhead Block [376]](https://www.greathardwarehub.com/wp-content/uploads/2026/09/harken-16mm-forkhead-block-376.webp)
![Harken 22mm Fiddle Micro Block w/V-Jam [244]](https://www.greathardwarehub.com/wp-content/uploads/2026/09/harken-22mm-fiddle-micro-block-w-v-jam-244.webp)
