45 SQ Gal Parallel Axle – 10-inch Hydraulic Disc

SKU: N/A Category: Axles - Disc Braked Tags: alko, Australian Made, Couplemate™ Core Brand: Couplemate

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Price range: $1,524.00 through $1,569.00 Inc.GST

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45mm Square Galvanised Parallel Axle | 10″ Hydraulic Disc Brakes (Holden & Land Cruiser)

Heavy-duty 45mm square parallel trailer axle setup engineered for maximum load durability, featuring high-performance 10-inch hydraulic disc brakes. Available in standard Holden 5-stud and Land Cruiser 6-stud patterns to suit demanding marine, commercial, and box trailer configurations.

Product Description

Upgrade your trailer’s hauling capacity and braking reliability with our premium 45mm Square Parallel Axle assembly. Unlike standard tapered axles, the parallel spindle profile uses matching large inner and outer bearings, significantly increasing weight distribution capacity and extending bearing life under harsh conditions.

This assembly includes fully integrated 10-inch hydraulic disc brake calipers and rotors, delivering immediate, responsive stopping power. The open-disc design provides superior heat dissipation compared to traditional drum brakes and allows rapid water drainage, making it the ideal choice for boat trailers frequently exposed to saltwater. Available in precision-machined Holden 5-stud or rugged Land Cruiser 6-stud hub patterns to match your existing wheels.

Key Features

Parallel Spindle Profile: Uses identical large inner and outer bearings for maximum load rating and reduced wear.
Hydraulic Disc Braking: Delivers smooth, reliable braking power via hydraulic pressure without mechanical cable stretch.
Corrosion-Resistant: Ideal for marine boat trailers, featuring rapid drainage and easy wash-down access.
Dual Wheel Compatibility: Choose between standard Holden 5-stud or heavy-duty Land Cruiser 6-stud configurations.
Solid Steel Core: Forged from high-grade 45mm square solid steel to prevent bending under maximum load limits.

Technical Specifications

Specification	Details
Axle Type	45mm Solid Square Steel
Spindle Profile	Parallel (L68149 Inner & Outer Bearings)
Brake System	10-inch Hydraulic Disc Calipers & Rotors
Stud Patterns Available	Holden 5-Stud (HT / HQ) or Land Cruiser 6-Stud
Maximum Load Capacity	Up to 1,600kg (subject to spring and tyre ratings)
Application	Boat trailers, heavy box trailers, commercial trailers, caravans

Australian Towing Regulations & Compliance

Ensure your trailer modifications comply with local vehicle safety standards. For official national rules on trailer builds, safety chains, and aggregate trailer mass (ATM) braking thresholds, consult the following government resources:

View national light trailer requirements via the Department of Infrastructure (VSB1 Bulletin).
Check state-specific towing and braking regulations on the Queensland Department of Transport and Main Roads (TMR) portal.

Recommended Components

Complete your trailer build or overhaul with these compatible parts available in our catalogue:

Frequently Asked Questions

Q: What is the load rating for this 45mm Square Parallel Axle?

A: When equipped with a parallel bearing profile, this heavy-duty 45mm square solid axle is rated for an ATM of 1600kg to 1800kg depending on configuration, making it significantly stronger than standard slimline options.

Q: Do I need an in-cab electric controller to operate the hydraulic disc brakes?

A: No. These 10-inch hydraulic disc brakes are generally operated via a mechanical override coupling master cylinder setup on the trailer drawbar, requiring no complex vehicle wiring.

Q: What bearings does this parallel axle setup require?

A: This configuration utilises Parallel Bearings (using two large inner bearings, typically ID: 34.9 mm L68149 for both inner and outer positions) to support maximum load capacity and reduce wear.

Q: Is this axle suitable for boat trailers and marine environments?

A: Yes. The solid steel axle is hot-dipped galvanised for premium corrosion resistance in harsh saltwater conditions.

Installation & Care: Do’s & Don’ts

✔ Do’s

Do double-check measurements: Always measure “Tip-to-Tip” and “Hub Face-to-Hub Face” lengths precisely before ordering.
Do pack bearings with marine grease: Fully pack parallel bearings and use high-quality marine seals if using on boat trailers.
Do install the bleeder up: Ensure hydraulic calipers are mounted facing forward with the brake bleed nipples at the top of the axle to prevent trapped air.
Do back off the castle nut: Tighten down firmly to seat the bearing cups, then back off slightly so the hub rotates freely without binding or preload play.

❌ Don’ts

Don’t overtighten the castle nut: Leaving the bearings under heavy preload will cause extreme friction, overheating, and premature failure.
Don’t weld on the galvanised coating: Avoid direct welding on galvanised surfaces without proper safety protection, and always treat raw areas with cold-gal Spray afterwards.
Don’t mix bearing sizes: Never use slimline or LM profile bearings on a machined parallel axle spindle.
Don’t exceed ATM limits: Never overload the trailer beyond the rated limit of the axle and suspension package.

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)

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.