50mm SQ Axle – Hydraulic Disc – Bearings: SL (Rating: 1450kg)

SKU: N/A Category: Axles - Disc Braked Brand: Couplemate

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$1,305.00 Inc.GST

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50mm Square Axle with Hydraulic Disc Brakes (SL Bearings, 1450kg Rating)

Heavy-duty 50mm solid square trailer axle equipped with premium 12-inch hydraulic disc brakes and Slimline (SL) bearings. Engineered for high-performance braking and maximum durability under a 1450kg load rating, making it ideal for large boat trailers, horse floats, and heavy utility trailers exposed to harsh marine or road environments.

Product Description

Upgrade your towing setup with this commercial-grade 50mm Solid Square Braked Axle. This assembly features high-efficiency 12″ hydraulic disc brakes that deliver superior stopping power compared to traditional mechanical setups. The system utilizes industry-standard Slimline (SL) bearings, ensuring smooth rotation, minimal heat buildup, and easy maintenance access.

Built specifically to handle tough Australian road conditions, the solid steel axle beam resists flexing under maximum load. The hydraulic caliper system provides responsive, proportional braking control, reducing vehicle wear and increasing operator safety during sudden stops.

Key Features

Solid Steel Core: 50mm square profile provides exceptional structural rigidity.
Hydraulic Efficiency: 12″ disc brakes offer smooth, reliable stopping power.
Slimline Bearings: Standard SL configuration ensures high availability for replacements.
Corrosion Resistant: Built to endure frequent saltwater submersion and road grime. (Axle Not Galvanised)
Complete Assembly: Includes hubs, calipers, bearings, seals, and dust caps.

Technical Specifications

Specification	Details
Axle Profile	50mm Solid Square
Brake Type	12″ Hydraulic Disc Brake
Maximum Load Rating	1450kg (Single Axle)
Bearing Type	Slimline (SL) Bearings
Hub Bolt Pattern	Standard 5-Stud or 6-Stud available
Finish	Natural Steel

Frequently Asked Questions

What type of brake fluid should be used with this axle?

Most hydraulic trailer calipers are compatible with standard DOT 3 or DOT 4 brake fluid. Always check your specific actuator manual before filling.

Do I need a specialised coupling to use hydraulic brakes?

Yes. You will need a hydraulic override coupling or an electronic-over-hydraulic (EOH) actuator system to generate fluid pressure.

Are Slimline bearings suitable for marine use?

Yes, Slimline bearings are highly reliable for marine applications provided they are packed with high-quality marine grease and protected by waterproof dust caps or bearing protectors.

Helpful Resources & Purchasing

Government & Authoritative Standards

Review legal towing limits via the Australian Vehicle Standards Bulletin 1 (VSB1).
Check regional light vehicle registration rules on the Queensland Department of Transport and Main Roads (TMR) portal.

There are no FAQs for this product.

Additional information

Weight	80 kg
Dimensions	40 × 240 × 40 cm
Stud Pattern (PCD)	5 Stud Landcruiser (5 x 150mm), 6 Stud Landcruiser (6 x 139.7mm), Ford (5 x 114.3mm)

Our Service Lifetime Warranty

Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.

Couplemate™ is a manufacturer and vendor of high-quality towing, trailer, and caravan components. Couplemate™ Core Goods and Custom Work are guaranteed to be free of defects for the service lifetime of the product when used as intended.

Warranties are non-transferrable and Couplemate™ requires satisfactory proof of purchase prior to issuing a remedy. The full Couplemate™ Warranty Policy can be found in the Terms & Conditions: Section 8 – Consumer Guarantees & Warranty.

Warranties are in addition to your rights under the Australian Consumer Law. If something is wrong with your order, please contact our team.

60-Day Returns

After 60 years of experience, we know that life has its unpredictable moments.

All Couplemate™ orders (online, over the phone, or in-store) have a 60 day period for change-of-mind returns and exchanges. There are some items that can’t be returned and some returns may incur a 15% restocking fee.

You can view our full policy for change-of-mind returns here.