3t electric brake drum suit 12-inch Electric Brakes
The 3t 2-piece brake drum is a 12-inch electric brake drum designed for heavy-duty trailer and caravan applications, with a capacity of up to 3000kg. It requires a separate hub and is available in various stud patterns, most commonly Land Cruiser 5-stud or 6-stud.
Two-piece hub drums must be assembled into a single piece. The two pieces comprise one inner hub and one outer brake hub.
- Land Cruiser PCD 140mm – 6 x 1/2 UNF Studs Nuts
- Land Cruiser PCD 150nn – 5 x 9/16 UNF Studs Nuts
Suit Bearings
- Inner ID 50mm, OD 89.96mm – HR30210
- Outer ID 38.10mm, OD 66.06mm – 29749
- ID 60.3mm, OD 89.96mm – 64607
- Dust Cap OD 76mm – DC3
Suits Al-ko three-tonne axles only
Key Specifications
According to various suppliers like Couplemate and Probar Trailer Components, the AL-KO 3t 2-piece brake drum has the following general specifications:
Brake Size: 12″ × 2″ (approx. 305 mm × 51 mm)
Axle Capacity: 3000kg (3 Tonne)
Configuration: Two-piece design (drum and hub sold separately)
Material: High-grade ductile iron, according to R&M Trailer Parts
Compatibility: Suits AL-KO axle profiles and is designed for use with 12-inch electric brakes
Bearing Compatibility: Suits inner bearing 30210 (ID 50mm) and outer bearing 29749 (ID 38.10mm)
Available Stud Patterns
The 3t 2-piece drum can be purchased in different stud patterns to suit various vehicle wheel types:
Land Cruiser 6 Stud: Features 6 x 1/2″ UNF studs on a 139.7mm PCD (Pitch Circle Diameter).
Land Cruiser 5 Stud: Features 5 x 9/16″ UNF studs on a 150mm PCD.
Ford F250/F350 8 Stud: Features 8 studs on a 170mm PCD.
Usage Notes
The actual hub portion is a separate component and must be ordered to match the required stud pattern and bearing configuration.
For use on corrugated roads, it is recommended to use the AL-KO Offroad electric magnet to significantly reduce drum wear, as standard magnets can cause quick degradation.
Your bearings will tell you if they need replacement during your inspection. If you see carbon black in the grease, you must replace your bearings, seal, and dust cap.
If you do not see carbon black, your bearings are suitable. If the grease looks hardened, they may need repacking.
Carbon black indicates that the casting of your roller bearings and journals has begun the wear process. These bearings will not be far from total collapse.
Another thing to look out for is your dust cap. Dust caps are a compression fit. If used repeatedly, the cap loses its compression and falls off the highway.
Couplemate recommends buying and installing new dust caps after checking bearings.
Additional information
| Weight | N/A |
|---|---|
| Dimensions | N/A |
| 3t Stud Pattern | 5 Stud Landcruiser – 2 piece, 6 Stud Landcruiser – 2 piece |
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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