Read our guide on what to put inside your safety bag to help you in an emergency.
Ronstan Ser 40 Bb Orbit Block Fiddle RF45501
UPC:
Delivery
In stock
No Store Selected
?>
Related Guides & Advice
Description
Series 40 Ball Bearing Orbit Block™ Fiddle
Kilogram for kilogram of working load, BB and RT Orbit Blocks™ are the world's lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave. This minimises the mass of the inactive return race and hub.
Fiddle sheave has a high load full contact bearing (ie. not ball bearing). Main sheave has two-stage, ball bearing
- Ultra Lightweight
- Low friction 2-stage Orbital ball bearing system
- Highest working load in its class
- Low profile and compact
- High performance cleating
- Easily fitted and securely retained Dyneema® Link head
- Convert to a becket version by adding a Dyneema® link
- Sheave 40 + 22mm
- Max. Rope 9 mm
- M.W.L. 325 kg
- B. L. 700 kg
- Weight 47 g
Specifications
| Brand | Ronstan |
|---|
Delivery & Returns
Delivery estimate 1-4 business days (non-rural)
Please allow 3-10 business days for rural and island deliveries. Read here for more information.
*Club members get free standard freight for non-rural, shoe box sized deliveries (normally $5.99) for purchases over $99. Additional charges apply for rural delivery, island delivery, dangerous goods and large packages.
Returns
Check out our easy returns policy.
Product Questions
Related Guides & Advice
Find out the main difference between an EPIRB and a PLB and what one is best suited for you!
Thinking about installing solar on your boat? This video walks through the installation of solar panels, Victron MPPT solar controller and Battery Monitor on the vessel 'Outnumbered'. Whether you're upgrading your existing setup or starting from scratch, this guide is packed with practical tips and real-world advice.
Winter boating in New Zealand brings colder temperatures, changeable weather and higher risks on the water, making preparation more important than ever. This Vital Checklist for Safe Boating covers essential gear, safety checks and practical tips to help you stay safe and confident every time you head out.
© Copyright Burnsco 2026
Compare