By MAURIPRO Sailing Specialists · Updated July 2026
What Makes Ronstan Orbit Blocks Different?
The standout feature of Orbit blocks is their strength-to-weight ratio. Ronstan uses advanced composite materials with stainless steel components to build blocks that are both very strong and light—important in high-performance sailing, where weight aloft and on deck affects speed and handling. The sheave is a fibre-reinforced polymer, which keeps friction low and efficiency high while resisting the loads and UV exposure of a marine environment.
The Two-Stage Bearing System
Orbit blocks use a two-stage bearing system that combines ball bearings for low loads with a full-contact bearing surface for high loads. Under light load the balls roll freely for minimal friction and effortless trimming; as load increases, the full-contact bearing takes over to carry the force without crushing the bearings. The result is a block that performs efficiently across a much wider load range than a single-bearing design—precise trimming when it’s light, reliable strength when it’s loaded up.
Versatility and Configurations
Orbit blocks come in a range of sizes and configurations—single, double, triple, with beckets, swivel heads, snap shackles and stand-up springs—so you can build the exact lead you need. This makes them suitable across the boat: mainsheet systems, vang and outhaul purchases, spinnaker gear and control lines. For the broader block picture and how Orbit fits alongside Ronstan’s other ranges, see our Ronstan blocks guide.
How to Choose the Right Orbit Block
Selecting an Orbit block follows the same logic as any block, with performance in mind:
- Load: pick a size whose working load exceeds your peak line load with shock-load margin.
- Line diameter: match the sheave to your line size for smooth running and minimal wear.
- Configuration: single/double/triple and head type (fixed, swivel, becket, snap shackle) to build your purchase and lead.
- Application: choose Orbit where low weight and low friction matter—racing and performance-cruising systems.
Where to Buy Ronstan Orbit Blocks
MAURIPRO carries the Ronstan Orbit range in single, double and specialty configurations. If you are outfitting a full performance system, pair Orbit blocks with the right lead hardware and see how they compare to the wider lineup in our Ronstan blocks guide.
Frequently Asked Questions
What is special about Ronstan Orbit block technology?
Ronstan Orbit blocks use a two-stage bearing system—ball bearings for low loads and a full-contact bearing for high loads—combined with fibre-reinforced sheaves and composite/stainless construction. This gives a high strength-to-weight ratio and low friction across a wide load range, so they trim precisely when light and carry heavy loads reliably.
How does the two-stage bearing system work?
Under light load, ball bearings roll freely for minimal friction and easy trimming. As load increases, a full-contact bearing surface takes over to carry the force without crushing the balls. This lets one block perform efficiently across a much wider load range than a single-bearing design.
Are Ronstan Orbit blocks suitable for cruising boats?
Yes. While Orbit blocks are engineered for high-performance and racing use, their durability and low friction also benefit cruising boats, especially on frequently adjusted systems like the mainsheet and vang. For light-load, set-and-leave leads, a standard block may be more economical.
What configurations do Ronstan Orbit blocks come in?
Orbit blocks are available as single, double and triple blocks, with options including beckets, swivel heads, snap shackles and stand-up springs. This range lets you build exact purchases and leads for mainsheet, vang, outhaul, spinnaker and control-line systems.
How do I choose the right size Orbit block?
Match the block to your peak line load with margin for shock loads, and match the sheave to your line diameter. Then choose the configuration (single/double/triple and head type) that builds the purchase and lead you need. Choose Orbit specifically where low weight and low friction matter most.
Questions? We're Here to Help
Have questions? Chat with us! Our MAURIPRO rigging and sailing specialists are available to help you find the right solution for your boat and sailing style.
Explore our selection: Ronstan Series 100 Orbit Block, Double (RF109200) and related sailing gear at MAURIPRO.
