Couplemate 50mm Square 3-Tonne (3t) Unbraked Lazy Axle Kit

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

60mm Round Axle 3t

CM-Core – Single Product Page

Australian-Made – Single Product Page

Price

Price range: $628.00 through $650.00 Inc.GST

Stud Pattern

Clear

Couplemate 50mm Square 3-Tonne (3t) Unbraked Lazy Axle Kit

Face-to-Face Length.(Required)

Enter the Face-to-Face length of your axle. (mm).

Please enter a number from 1000 to 2400.

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Couplemate 50mm Square 3-Tonne (3t) Unbraked Lazy Axle Kit

Heavy-Duty Australian-Made Axle Assembly for Agricultural & Mining Applications

The Couplemate 50mm Square 3-Tonne (3t) Unbraked Axle is a premium, heavy-duty solution engineered specifically for high-capacity off-road transit, mining operations, and rigorous agricultural tasks. Sourced from specialist trailer parts suppliers and custom-crafted to your specific track length, this unbraked “lazy axle” configuration delivers unmatched structural reliability. It is ideal for moving hay bales, hauling fresh produce across the farm to roadside transport trucks, or supporting wide-span farm irrigator booms moving through rough paddocks.

Product Purchasing & Categories

Purchase This Product: Explore ordering configurations directly on the Couplemate Official Store.
Browse the Full Range: View all high-capacity setups on the Couplemate Trailer Axles Collection Page.

Why Choose the Couplemate 3t Unbraked Axle?

When working in demanding agricultural and isolated mining environments, component failure is not an option. Couplemate manufactures one of the best unbraked axles on the Australian market by combining high-grade materials with expert, precision craftsmanship.

Every single 3t unbraked axle is factory pre-assembled in our Australian workshops. We clean, grease, and set the tolerances of the heavy-duty Japanese bearings by hand using high-temperature, high-performance grease before dispatch. This guarantees that your bearing clearances and hub seating are perfect right out of the box. Backed by Couplemate’s lifetime warranty against faulty craftsmanship, this structural kit provides ultimate peace of mind on the field.

How to Calculate Correct Axle Measurements

Before placing your custom order, follow these straightforward steps to map your requirements:

Measure Wheel Offset: Find the exact distance between the hub face line and the outer edge of your tyre sidewall.
Determine Clearance: Add 50mm to this offset metric (or specify your preferred spacing between the rubber tyre and trailer chassis frame).
Calculate Track Width: Multiply that final number by 2 (for both sides of the trailer).
Add Chassis Width: Combine that sum with your overall trailer chassis frame width to determine your required hub face-to-face distance.

Essential Measuring Guide Codes

[P] Profile Spec: The size and profile layout of the axle bar (e.g., 50mm Square).
[T] Tip-to-Tip: The absolute overall axle length measured from thread tip to thread tip.
[F] Hub Face-to-Face: The precise measurement taken between the two flat hub surfaces where wheels bolt on.
[A] Chassis Width: The total outside-to-outside dimension of your trailer frame.
[C] Tyre Clearance: The distance allowed between the inside of the tyre and the trailer side.
[B] Back Offset: The rear spacing profile calculation.
[H] Tyre to Chassis: Clearance gap between the tyre edge and the main frame.
[G] Axle Pad Centres: The distance measured between the center points of the welded spring pads.

Note: You will also need to verify your bearing profile. Remove an existing hub assembly and read the laser-engraved identification part numbers on both the inner and outer bearings.

Key Features & Technical Specifications

What is Included in Your Kit:

1 x 50mm Solid Square Australian-Made Axle
2 x Heavy-Duty Lazy Hubs fitted with Premium AL-KO Components
High-Capacity Japanese Bearings (rated up to a full 3,000kg)
Pre-greased with high-temperature, high-performance grease

Technical Specification Table

Axle Attribute	Technical Specification Data
Axle Core Profile	50mm Solid Square Profile Steel
Hub Engineering	Genuine 3-Tonne (3t) AL-KO Lazy Hubs
Bearings	High-Grade Japanese Bearings (Rated 1450kg to 3000kg)
Braking System	Unbraked / Lazy Configuration (Off-Road / Agricultural Use)
Included Hardware	Heavy-Duty Wheel Nuts, Front Bearing, Rear Bearing, Dust Cap, Rear Seal
Craftsmanship Quality	Pre-assembled to factory specs; backed by Couplemate Lifetime Warranty

Request a Custom Axle Quote

Please provide your custom dimensions using the layout form below to submit your manufacturing blueprint directly to our engineering team:

Frequently Asked Questions (FAQ)

Can I legalise this 3t unbraked axle for highway use at full capacity?

No. Under Australian national trailing standards, trailers towed on public highways with an Aggregate Trailer Mass (ATM) exceeding 750kg must be fitted with an efficient braking system operating on at least one axle. This unbraked axle is designed exclusively for off-road farm management, mining operations, or as an unbraked tag/lazy axle in multi-axle configurations where the primary axles handle braking.

Why are Japanese bearings included instead of standard commercial bearings?

Heavy-duty agricultural and mining tasks expose components to immense static loads, dust, mud, and water. Japanese bearings are precision-machined to much tighter tolerances and feature superior case hardening, ensuring they handle high loads of up to 3 tonnes without premature pitting or structural fatigue.

Are these 50mm square axles kept in stock for immediate delivery?

Because heavy-duty trailer tracks vary widely across different harvester machinery, farm chassis, and custom miner setups, these heavy-duty 3t axles are typically custom-machined and built-to-order. This ensures the hub face-to-face [F] measurement accurately aligns with your chassis tracking.

Find Similar Unbraked Axles Below

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Additional information

Weight	70 kg
Dimensions	240 × 60 × 60 cm
Stud Pattern	3t Landcruiser 5 stud, 3t Landcruiser 6 stud
Beam Size	60mm Round
Axle Rating	3000kg ATM
Axle Style	Straight
Axle Type	Unbraked axles
Bearing Profile	AU 3.0t
Brake Type	Unbraked
Coating	Natural
Hub Boss Diameter	105mm
Hub Cap	3"
Materials	K1045 Steel
NSK Bearing #	29749/10, 30210J
Seal SKU	64607

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.

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