10" Electric Drum (CM461)

10 inch Electric Drum

The 10-inch electric brake hub drum maximum rated load capacity is
electric brake drum

1000kg standard bearings – 11949 / 67048
1250kg composite bearings – 12749 / 67048
1450kg slimline Bearings – 12749 / 68049
1600kg parallel bearings – 68049 x 2
A few years ago, we were worried about the increasing loss of quality and increasing complaints from imported drums.

We decided to make a better 10-inch drum brake to ensure electric brake drums were first class and we could take ownership of a quality product. We also gained the opportunity to make a variety of uniquely studded drums within 48 hours.

What makes Couplemate Electric Brake Drums Different?

Our engineers discovered a little talked about a problem called porosity as a major cause of braking inefficiencies.

Porosity is a series of holes in a casting that causes lower brake shoe adhesion.

In simple terms, a porous surface will have less braking resistance than a non-porous surface.

The best way to explain how to remove air from steel is to understand how air is expelled from concrete. The process of shaking or vibrating the tooling containing a drum casting effectively removes air bubbles thereby greatly reducing porosity.

Further, during the machining process, our craftsman is on the lookout for a sign of porosity. When found, drums are rejected, scraped and returned to the furnace. As a result, you can be assured the drums you have purchased have undergone rigorous testing and inspecting processes.

Today we sell, Australian made Couplemate 10? brake drums and Alko 12? brake drums to the RV markets and for retail consumption.

10 inch Drum Specifications

Gemini/Honda – PCD 100mm – 4 x 7/16? Studs – 1000kg per axle
Datsun – PCD 114mm – 4 x 7/16? Studs – 1000kg per axle
Mini – PCD 101.6mm – 4 x 7/16? Studs – 1000kg per axle
Cortina- PCD 107.95mm – 4 x 7/16? Studs – 1000kg per axle
5 Stud HT Holden – PCD 4.25 inch – 5 x 7/16 UNF Studs
HQ Holden – PCD 4.5 inch – 5 x 7/16 UNF Studs
Commodore – PCD 120mm – UNF 5 x 7/16 Studs
Ford – PCD 4.5 inch – 5 x 1/2 UNF Studs
Landcruiser PCD 139.7mm – 6 x 1/2 UNF Studs
Landcruiser PCD 150mm – 5 x 9/16 UNF Studs
14mm Studs – Landcruiser PCD 150mm
Nissan PCD 114.3mm – 6 x 1/2 UNF Studs
F100 PCD 139.7mm – 5 x 1/2 UNF Studs
F250 – 8 x 1/2? Studs – 170mm PCD
F250 – 8 x 9/16? Studs – 170mm PCD
Ford 250 – 8 x 5/8? Studs – 170mm PCD
F250 – 8 x 1/2? Studs – 6.5? PCD
F250 – 8 x 9/16? Studs – 6.5? PCD
Ford 250 – 8 x 5/8? Studs – 6.5? PCD
Range Rover Discovery PCD 120mm – 5 x 5/8 UNF Studs
Dodge Ram – PCD 6.5? – 8 x M14 Studs
Land Rover – PCD 6.5? – 5 x 9/16 UNF Studs
Land Rover – PCD 6.5? – 5 x 5/8 UNF Studs
LandRover – PCD 6.5? – 8 x 1/2 UNF Studs
Note: other PCD’s made to order. Contact Couplemate if your drum is not listed above.


Suits LM Holden

Inner ID 31.75mm, OD 59.10mm
Outer ID 19.05mm, OD 45.20mm
Seal ID 37.5mm, OD 59.10mm
Grease Cap 45.20mm

Slimline Ford 5 Stud

Inner ID 35.00mm, OD 59.10mm
Outer ID 22.00mm, OD 45.20mm
Seal ID 43.9mm, OD 59.10mm
Grease Cap 45.20mm

Trailer and caravan electric brakes have a variety of problems—not just worn bearing journals. The only thing you can do with worn outer bearing journals is to replace the drum. (Store Locator)

The fix will last until you get into the next big town without the need for an emergency tow. Limit your speed to 60 km, and hobble into town, Also, be on the lookout for a worn magnet face, both on your magnet and on your inner drums. Worn surfaces will decrease braking efficiency by about 70%.

When you’re out in the Australian outback, your vehicle and caravan trailer have to deal with a lot more than just a bumpy ride. The temperature outside is reasonably hot, and most parts of your car, especially, the suspension, the brakes, ball coupling and the springs, are subject to large amounts of physical stress.

Please note: Wheel nuts not included.

We also ship products to New Zealand via Australia Post Air Express.

© Steve Wotherspoon on April 11, 2014. Images and text may be copied, provided a link back to the copied page and the source is displayed where the content or image is located.