Series 20 Ball Bearing Block – Single
Features:
- Low friction
- High static and dynamic load capacity
- Lightweight
- Precision molded Acetal sheaves running on stainless steel or Torlon® ball bearings provide high performance & low friction
Applications:
- Dinghy control lines
- Dinghy Vangs
- Cunninghams
- Traveller controls
Materials:
- U.V. Stabilized Acetal sheaves
- Stainless steel ball bearings
- Grade 316 stainless steel load strap and head fitting
- Impact and UV resistant, fiber reinforced Nylon cheeks
Specifications:
Sheave Ø:20mm(3/4″)
Max. Rope Ø:6mm(1/4″)
Pin Ø: 3mm(1/8″)
M.W.L.:250kg(550lbs)
B. L.:550kg(1,210lbs)
Weight:20g(0.7oz)


![Ronstan Series 30 Ball Bearing Orbit Block - Stand Up Swivel [RF35140]](https://www.greathardwaredepot.com/wp-content/uploads/2026/09/ronstan-series-30-ball-bearing-orbit-block-stand-up-swivel-rf35140.webp)
![Ronstan Series 30 Ball Bearing Orbit Block - Triple - Becket [RF35312]](https://www.greathardwaredepot.com/wp-content/uploads/2026/09/ronstan-series-30-ball-bearing-orbit-block-triple-becket-rf35312.webp)
![Ronstan Nylatron Sheave Box - Single Upright Lead Block [RF453]](https://www.greathardwaredepot.com/wp-content/uploads/2026/09/ronstan-nylatron-sheave-box-single-upright-lead-block-rf453.webp)


![Ronstan Series 40 Ball Bearing Block - Double - Swivel Head [RF40200]](https://www.greathardwaredepot.com/wp-content/uploads/2026/09/ronstan-series-40-ball-bearing-block-double-swivel-head-rf40200.webp)
