Series 30 Block – Single – Loop Top
Features:
- Maintenance free
- Economical
- Lightweight durable construction
- Stainless steel cheeks and Acetal sheaves ensure a long service life with virtually no maintenance
- Hollow rivets in the block heads can be fitted with shackles, which can also be used to add a becket for extra purchase
Applications:
- Vang, cunningham and trapeze retriever systems on dinghies
- Leech line tackles, bunk adjusters etc on larger yachts
Materials:
- UV Stabilized Acetal sheave
- Grade 316 stainless steel cheeks
Specifications:
Sheave Ø:29mm(1-1/8″)
Max. Rope Ø:8mm(5/16″)
M.W.L.:300kg(660lbs)
B. L.:600kg(1,320lbs)
Weight:20g(0.7oz)




![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 Series 30 Ball Bearing Orbit Block - Cheek [RF35151]](https://www.greathardwaredepot.com/wp-content/uploads/2026/09/ronstan-series-30-ball-bearing-orbit-block-cheek-rf35151.webp)

