RDA Brake Drums
RDA Brakes has Australia’s "Largest and most comprehensive" range of brake Drums.
RDA have a full range of Brake Shoes that are made to suit our Drums.
Drum brakes are still used in some modern cars and most smaller cars, because of some engineering and cost advantages. They are often applied to the rear wheels since most of the stopping force is generated by the front brakes of the vehicle and therefore the heat generated in the rear is significantly less.
TUV translated to into english "Technical watch over Association" it is a German certifying body involved with product safety for the European community. Again it is a vast list of technical standards that automotive products are designed and produced to, so consumers receive the highest of quality parts. "ECE 11 R90 APPROVED for vehicles within ECE, All RDA Brakes brake disc's, brake drums, brake pads, and brake shoes are made to the same exacting standards.
Drum brakes, like most other types,are designed to convert kinetic energy into heat energy via the process of friction. This heat is intended to be further transferred to atmosphere, but can just as easily transfer into other components of the braking system. Brake drums have to be large to cope with the massive forces that are involved, and they must be able to absorb and dissipate a lot of heat. Excessive heating can occur due to heavy or repeated braking which can cause the drum to distort, leading to vibration under braking. Excessive heating of the brake drums can cause the brake fluid to vaporise, which reduces the hydraulic pressure being applied to the brake shoes.
Therefore less retardation is achieved for a given amount of pressure on the pedal.
- The effect is worsened by poor maintenance.
If the brake fluid is old and has absorbed moisture it thus has a lower boiling point and brake fade occurs sooner.
Brake fade is not always due to the effects of overheating.
If water gets between the friction surfaces and the drum, it acts as a lubricant and reduces braking efficiency.
The water tends to stay there until it is heated sufficiently to vaporise, at which point braking efficiency is fully restored.
All friction braking systems have a maximum theoretical rate of energy conversion.
Once that rate has been reached, applying greater pedal pressure will not result in a change of this rate, and indeed the effects mentioned can substantially reduse it.
Ultimately this is what brake brake fade is, regardless of the mechanism of its causes.
When replacing brake drums, care should be taken in relacing the brake fluid and brake shoes, in all instances.
All RDA brake drums are covered by our 12 month 20,000km warranty.
Our comprehensive range is not limited to just recently released vehicles, but also includes applications for many older vehicles dating back to the 1950s.
- RDA have a full range of Brake Shoes that are made to suit our Drums.
BRAKE DRUM FITTING
- Brake Drums are a Safety Critical Component
Replacement is necessary when braking surfaces are scored, or the diameter has exceeded the maximum size marked on the rim of the drum.
IMPORTANT CHECK POINTS
- To fit a new brake drum, the following instructions must be followed:
- clean drum with suitable solvent, to remove protective coating
- Ensure all mating surfaces, (brake drum, hub, axle, bearings etc.) are completely clean and free of burrs, or other defects.
- Replacement of one brake drum can be dangerous, due to unbalanced braking
- Always replace brake drums in “pairs” (left & right) to ensure even braking.
- Always fit new brake shoes with new brake drums.
- Avoid high speed braking or excessive braking until new brake drums are “bedded-in” to avoid overheating and subsequent reduction in braking performance.
- A distance of at least 200-300 kms is recommended for running in period
- Brake drums and brake shoes are safety critical components.
- Regular inspections of these components are essential for safety.
- All Brake products from RDA Brakes are covered under our extensive 12 months 20,000 km replacement warranty. Our product is not covered when used in off road, competition or club racing purposes and is designed for normal street use only.