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

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

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Price range: $1305.00 through $1519.00 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 access for maintenance.

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: The standard SL configuration ensures high availability of 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	10″ or 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

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.

Axle Profile: 50mm Solid Square steel, providing superior resistance to flexing under heavy loads compared to round variants.
Braking System: High-performance Hydraulic Disc Brakes, ideal for direct braking response and marine applications.
Bearing Configuration: Slimline (SL) profile (Inner: 68149/10, Outer: 12749/10).
Maximum Load Capacity: Rated legally up to 1450kg per single axle setup.

Installation & Usage Do’s

Do verify your hub-face to hub-face (HF-HF) and tip-to-tip measurements accurately before processing your custom order.
Do pack your Slimline bearings with high-quality marine-grade grease if using this axle on boat trailers.
Do pair identical axles, brakes, and suspensions if configuring this unit into a tandem setup to ensure uniform load distribution.
Do maintain a minimum 50mm clearance gap between the tyre sidewall and the trailer chassis to prevent guard rub.

Installation & Usage Don’ts

Don’t exceed the maximum legal capacity of 1450kg, even if the 50mm square steel beam physically looks like it can hold more weight.
Don’t weld close to the machined bearing turn area or the hydraulic caliper mountings to avoid altering structural temper.
Don’t use standard automotive grease for hydraulic disc systems; the high heat generated requires high-temperature wheel bearing grease.
Don’t mix bearing profiles (e.g., attempting to force Parallel or 2-Tonne bearing components onto this SL machined axle stub).

Additional information

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

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.