The Ronstan Series 30 Ball Bearing Orbit Block is a cheek-mount block engineered for a high strength-to-weight ratio. It features a precision design that optimizes the number of ball bearings to minimize friction, utilizing fiber-reinforced composites to reduce overall weight.
Key Features and Specifications:
- Sheave diameter: 30mm (1-3/16 in.)
- Maximum rope diameter: 8mm (5/16 in.)
- Maximum Working Load (M.W.L.): 300kg (660 lbs.)
- Breaking Load (B.L.): 600kg (1,320 lbs.)
- Weight: 21g (0.7 oz.)
- Sheave material: High compression strength carbon black Acetal
- Ball bearing material: High compression strength Acetal
- Frame and cheek material: Toughened, glass fiber reinforced Nylon
- Link material: UV stabilized, multi-strand impregnated SK75 Dyneema
- Design features: Lightweight, low profile, and compact construction
Recommended Applications:
- Mainsheet and spinnaker sheet systems on dinghies up to 5m (16 ft.)
- Halyard, vang, and backstay applications on boats up to 5m (16 ft.)
- Control line applications on larger yachts
Product facts
- CT SKU
- CT-103696
- Model / MPN
- RF35151
- UPC / GTIN
- 9316800404964
- Package dimensions
- 1" X 3" X 4"
- Package weight
- 0.06 lb
Fit-sensitive item: confirm measurements, model numbers, and manufacturer details before ordering. Tug & Tow does not guarantee universal compatibility from a product page alone.
Shipping & returns
Shipping & returns
Shipping methods, delivery estimates, and final costs appear at checkout before payment. Some bulky, supplier-shipped, or special-handling items may ship separately. See Shipping & Returns for return windows and eligibility.
Fit & compatibility
Fit & compatibility
Review the product title, description, images, dimensions, part numbers, and manufacturer details before purchase. For fit-sensitive items, confirm compatibility with your boat, RV, trailer, vehicle, or equipment.
Need help choosing?
Need help choosing?
Send us the product link or SKU, plus details about your boat, RV, trailer, vehicle, or project. We will help you narrow down the right option when product fit is not obvious.
