Mechanical Override Brakes

9″ Mechanical Drum Brakes on 40mm Square and 45mm square Axles. Activated by 2t override coupling.

Mechanical drum brake axle ratings are 1450kg for a single axle or 2000kg for a tandem axle setup.

Axle ratings as follows

• 40mm Square – 1000kg
• 45mm Round – 1450kg
• 45mm Square – 1450kg

40mm and 45mm Axles are ideal for override trailers up to 200cm or 2 meters. Axle flex occurs in longer axles. Axle flex, in turn, causes vibration fatigue.

Video: Vibration Fatigue in Caravans and Boat Trailers

Trailers wider than 2 meters use 45mm Square axles. Stronger axles carry their load better and as such do not suffer axle fatigue.

Finally, this article is also a good read. Why U-bolts may be the Major Cause of Accidents