Can Brake Drums Be Resurfaced for Enhanced Performance and Safety?

Can Brake Drums Be Turned? A Comprehensive Guide

Brake drums are a critical component of a vehicle's braking system, particularly in older cars and certain types of trucks. They work in conjunction with brake shoes to create the friction necessary to stop the vehicle. Over time, wear and tear can lead to an uneven surface on the brake drum, which can compromise braking performance. This raises the question Can brake drums be turned? In this article, we will explore what it means to turn brake drums, when it's appropriate to do so, and the considerations involved.

Understanding Brake Drums

Brake drums are cylindrical components that house the brake shoes. When the driver applies the brakes, hydraulic pressure pushes the shoes against the inner surface of the drum, creating friction that slows down the vehicle. With continuous use, the interior surface of the brake drum can become grooved, warped, or otherwise damaged, leading to poor braking performance, noise, and vibration.

The Turning Process

Turning a brake drum, also known as resurfacing, involves machining the inner surface to restore it to a smooth finish. This process can help eliminate any irregularities caused by wear or heat, ensuring that the brake shoes have sufficient contact area. The turning process typically involves a lathe, which carefully removes a thin layer of material from the drum's surface.

When to Turn Brake Drums

Turning brake drums is usually considered when

1. Surface Irregularities If the inner surface of the drum shows signs of wear, such as grooves or hot spots, it may benefit from being turned. 2. Excessive Brake Noise Squeaking or grinding noises during braking can indicate uneven wear on the brake drum.

3. Vibration If you experience vibrations when braking, it could be due to a warped drum, which can sometimes be corrected by turning.

However, it’s worth noting that there are limits to how much material can be removed from a drum. Most manufacturers specify a minimum thickness for brake drums. If turning the drum would reduce it below this minimum, replacement is necessary.

Advantages of Turning Brake Drums

- Cost-Effective Resurfacing old drums can be significantly cheaper than purchasing new ones, especially for those on a budget. - Enhanced Performance By restoring the drum surface, turning can improve braking effectiveness, reduce noise, and enhance overall safety.

Disadvantages and Considerations

While turning brake drums can offer benefits, there are also potential downsides

1. Material Limitations As previously mentioned, excessive turning can lead to drums being below the safe minimum thickness, which is crucial for effective braking.

2. Hidden Damage Sometimes, what appears to be surface damage is indicative of deeper issues, such as cracks or warping that may not be correctable through turning.

3. Longevity If the drums are excessively worn, even resurfaced drums may not last as long as a new set, potentially leading to more frequent replacements.

4. Professional Assessment Always consult a qualified mechanic to evaluate whether turning is a viable option or if replacement is the safer choice.

Conclusion

In summary, brake drums can indeed be turned, and doing so may extend their service life while enhancing braking performance. However, it is essential to understand the limitations and potential risks involved. Before deciding to turn your brake drums, have them inspected by a professional. They can provide guidance based on the condition of the drums and your specific vehicle. Ultimately, the safety and performance of your vehicle’s braking system should always be the top priority. Regular maintenance and timely interventions can help ensure your vehicle's braking system remains in optimal condition, providing peace of mind on the road.