Drum brakes have been a staple in automotive braking systems for decades, providing reliable stopping power in countless vehicles. While disc brakes have become more common in recent years, drum brakes are still found on many cars, trucks, and SUVs. However, like any braking system, drum brakes require regular maintenance to ensure optimal performance and safety. In this article, we’ll explore the ins and outs of drum skimming, including what it involves, why it’s essential for maintaining brake efficiency, and the process of supplying and fitting new drums when necessary.
Understanding Drum Brakes:
Drum brakes consist of a round drum-shaped housing, brake shoes, wheel cylinders, and brake drums. When the brake pedal is pressed, hydraulic pressure forces the brake shoes against the inner surface of the drum, creating friction and slowing down the vehicle. Over time, the friction generated during braking can cause the brake drum’s inner surface to wear unevenly, leading to decreased braking efficiency and potential safety hazards.
What is Drum Skimming?
Drum skimming, also known as drum machining or drum resurfacing, is a process used to restore the smooth, flat surface of brake drums. During skimming, a thin layer of material is removed from the inner surface of the drum using specialised equipment, eliminating any grooves, scoring, or uneven wear that may have developed over time. This process restores the drum to its original specifications, allowing for better contact between the brake shoes and drum surface and improving braking efficiency.
Why Drum Skimming is Essential for Better Braking:
Maintaining properly functioning brake drums is crucial for ensuring safe and reliable braking performance. Here are some reasons why drum skimming is essential:
1. Improved Braking Efficiency: Drum skimming restores the smooth surface of the brake drum, ensuring better contact and friction between the brake shoes and drum surface. This leads to improved braking efficiency and shorter stopping distances.
2. Prevention of Brake Fade: Uneven wear on the brake drum can lead to brake fade, where the braking performance decreases due to overheating of the brake components. Drum skimming helps prevent brake fade by maintaining consistent friction between the brake shoes and drum surface.
3. Extended Drum Lifespan: By addressing minor wear and imperfections early through skimming, you can extend the lifespan of your brake drums and avoid the need for premature replacement. This saves you money in the long run and ensures continued safety on the road.
Supplying and Fitting New Drums:
In some cases, drum skimming may not be sufficient to restore the brake drums to optimal condition. When the wear is too severe or the drum is damaged beyond repair, supplying and fitting new drums becomes necessary. This involves selecting the appropriate replacement drums for your vehicle’s make and model and ensuring proper installation by a qualified technician.
In conclusion, drum skimming is a crucial aspect of brake maintenance that should not be overlooked. By restoring the smooth surface of brake drums, drum skimming ensures optimal braking efficiency, prevents brake fade, and extends the lifespan of brake components. If you notice signs of uneven wear or decreased braking performance, it’s essential to have your brake drums inspected and skimming performed if necessary. By prioritising drum maintenance as part of your regular vehicle servicing routine, you can enjoy peace of mind knowing that your brakes are in top condition and ready to provide reliable stopping power when you need it most.
