The Ronstan Series 40 Orbit Block is a single ball-bearing block featuring an integrated becket, cleat, and swivel head for versatile performance in sailing systems. Built with a low-friction 2-stage orbital ball bearing system, this block provides a high working load while maintaining a compact, ultra-lightweight profile.
Key Features:
- 2-stage orbital bearing system for efficient, low-friction operation
- Ultra-lightweight, stress-optimized fiber-reinforced load frame
- High-performance cleating functionality
- Through-sheave becket arrangement to minimize weight
- Durable materials including acetal ball bearings and glass fiber reinforced nylon cheeks
Applications:
- Mainsheet and spinnaker sheet systems for dinghies up to 5m (16ft)
- Halyard, vang, and backstay applications for boats up to 8m (26ft)
- General control line use on larger yachts
Product facts
- CT SKU
- CT-110141
- Model / MPN
- RF45130
- UPC / GTIN
- 9316800455256
- Package dimensions
- 2" X 4" X 7"
- Package weight
- 0.26 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
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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.
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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.
