How to Change the Pad on a DA Sander: A Comprehensive Guide

Whether you are a DIY enthusiast or a professional in need of maintaining the performance of your reciprocating sander, understanding how to change the pad on a DA (Dual Action) sander is a valuable skill. This article will walk you through the process with detailed instructions, tips, and troubleshooting steps.

Understanding DA Sanders and Their Components

A Dual Action (DA) sander is a versatile tool used for sanding surfaces quickly and efficiently. It offers both a natural orbit and a linear motion, which makes it ideal for sanding curves and flat surfaces. The pad, a disposable or reusable disc that fits onto the sander, is key to its functionality. Pads are usually made of foam or paper and are designed to stick to the sander with an adhesive backing.

Changing the Pad on a DA Sander: The Basics

Removing the Old Pad

To replace the pad, you first need to remove the old one. Depending on the model of your sander, the old pad can either be removed by pulling it off if it has an adhesive backing, or by spraying adhesive and removing it. Here’s how you can do it:

Pull the pad off if an adhesive is present. If no adhesive, apply a spray-on adhesive and let it dry slightly before removing the pad.

Removing the Pad for Round Sanders

For round pads, you might find that twisting the pad will cause it to come off. However, if the pad twists off due to a design that prevents it from being removed by hand, there is usually a flat side or a hole for a wrench between the pad and the sander. Make sure to check for this feature:

Look for a hole or flat spot between the pad and the sander. Use an appropriate wrench if the sander has one. Twist the pad as it turns, and if possible, remove the pad.

Note that air-powered DA sanders often have a dust guard that may cover the wrench hole. You will need to remove or lift the dust guard to access this area.

Changing the Pad on Square Sanders

Most square sanders have four screws that hold the pad in place. Here’s how to remove and replace it:

Locate the four screws holding the pad in place if no sandpaper is installed. Remove the screws and lift the pad off gently. Before installing the new pad, make sure to clean the mounting surface of the sander thoroughly to ensure a good adhesion.

Inspection and Storage of the Old Pad

Be sure to inspect the old pad for any signs of wear or damage before replacing it. Proper storage is crucial to prevent contamination and damage. Store the old pad in a clean, dry place and consider applying a protective covering to prevent dust or debris from getting on it.

Troubleshooting Process

Occasionally, you may encounter issues when changing the pad on a DA sander. Here are some common problems and their solutions:

Problem 1: Adhesive Does Not Remove Easily

If the old pad is difficult to remove due to excessive adhesive, you can try the following:

Apply olive oil to soften the adhesive. Let it sit for a few seconds before gently pulling the pad.

Problem 2: Pad Twists but Grease Is Not The Solution

Ensure that the pad is properly seated in the wrench hole and that an appropriate amount of grease is applied. If the pad continues to twist, check if the wrench hole is properly aligned.

Problem 3: Screws Are Missing or Broken

If you encounter issues with screws, it may be due to damage during use or a faulty model. Make sure you have the correct replacement screws and that they are installed correctly.

Conclusion

Replacing the pad on your DA sander is a straightforward process that can be mastered with some basic tools and patience. By understanding the different types of pads and the specific steps required for removal and installation, you can easily maintain your sander, ensuring it continues to perform optimally. Whether you’re doing this for a DIY project or professional maintenance, regular pad changes can greatly extend the life of your tool.

FAQs

Q: How often should I replace the pad on my DA sander?

A: The frequency of pad replacement depends on the type of material you are sanding and the condition of the pad. Typically, you should replace the pad every 20-30 hours of use, or when the pad shows signs of wear.

Q: Can I use any adhesive to remove the old pad?

A: It is best to use a high-quality adhesive remover unless you are using a pad with a specific adhesive. Consult the manufacturer's instructions for the best removal method.

Q: How long do I need to wait after cleaning the mounting surface before installing a new pad?

A: Allow the surface to dry completely before installing a new pad to ensure a secure and effective adhesion.