Ronstan Series 55 Orbit Block

Ronstan Series 55 Orbit Block

$59.90 /
Subscription -

🚚 Usually Ships within 24 hours

Available for pickup
In stock at 3/28 Thurecht Parade · Usually ready in 24 hours

In stock at 3/28 Thurecht Parade

Ronstan Series 55 Orbit Block

Available for pickup

3/28 Thurecht Parade

Usually ready in 24 hours

3/28 Thurecht Parade
Scarborough QLD 4020
Australia

The Ronstan Series 55 Orbit Block™ Upright Lead features a low friction 2-stage orbital ball bearing system delivering the highest working load in its class at minimum weight. The unique orbital design places bearings only in the active areas of the floating sheave, minimising mass in the inactive return race and hub. The floating sheave and bearing system is supported by a computer-modelled, stress-optimised fibre-reinforced load frame. Requires 2 x 6mm (1/4") fasteners for mounting.

Suited to mainsheet systems on dinghies, sportsboats and small keelboats to 9m, halyard, vang and backstay applications on boats to 8m, and control line applications on larger yachts.

Item Code: RF55171
Type: Upright lead
Sheave Diameter: 55mm
Max Rope Diameter: 10mm
Breaking Load: 1,000kg
Max Working Load: 500kg
Weight: 91g
Mounting: 2 x 6mm (1/4") fasteners required

Materials:
- Sheave: Carbon fibre reinforced, PTFE impregnated nylon
- Ball bearings: High compression strength carbon black acetal
- Stage 2 bearing: Carbon fibre reinforced, PTFE impregnated nylon
- Frame/cheeks: Toughened, glass fibre reinforced nylon
- Rope link: UV stabilised, multi-strand impregnated SK75 Dyneema®

Why Shop With Us

Product Sourcing

We source hard-to-find boat parts from our trusted suppliers.

Nationwide Shipping

Fast dispatch Australia-wide from our boat chandlery located in Brisbane.

Friendly service

Speak directly with marine experts - not a call centre!

Click & Collect

Pick up from our store, metres from Scarborough boat ramp!

FAQs

Yes — our store is located in Scarborough, Queensland. Simply select the click and collect option at checkout and we’ll notify you as soon as your order is ready. Collection is available from 3/28 Thurecht Parade, Scarborough.

We offer standard and express shipping via Australia Post. For large or bulky items, shipping may need to be quoted separately, we’ll contact you with the best available option. View our shipping information for more details on pricing.

Our Request a Quote option is designed for special order items or products not currently listed online. It’s also available for large or bulky items where shipping needs to be calculated. Provide as much detail as possible and our team will source the item and get back to you with pricing.

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