How To Change Backing Plates Of A DA Sander
Dual-action (DA) Sanders are the cross between a disk sander and a belt sander but don’t be confused with either one. Dual action sanders are not the substitute for a disk sander or a belt sander. A DA sander does the some of the same jobs that other two sanders do. Dual action sander is ideal for feathering, edging and finishing. DA sander is great for bodywork, wood or sanding metal.
People who need to remove scratches, polish paint work, spread wax, decontaminate the surface with a clay eraser disc, scrub carpet or upholstery to tidy up any dirt and strains, or need to restore headlights to get rid of faded yellow look.
A sander featured with different types backing plates are needed for different types of work. If you use 5-inch pad on your sander but sometimes you may need to polish a smaller area like door jambs or roof pillars, that time you may need to use 3-inch pad for that work. Sometimes you may be working on a large vehicle and for that work, you might need a 6-inch pad.
So switching between the different size of backing plates makes it easier to run different pads and get a good professional result.
Most of the machine comes with an instruction book and a small wrench. A wrench is the only tool that you need to change the different size of the backing plate or buffing pad. Let’s do the process.
Take the machine and turn over, you will get a small slot cut into the housing around the counterweight mechanism. If the counterweight of the sander is in the way and you can’t fit the wrench in, so simply move the dual action mechanism so that you can fit the wrench in. Now set the sander down flat, take the wrench and get in the wrench through that small opening slot, and spin the buffing pad head around until the spindle inside.
We need to grab the spindle with the wrench while we unscrew the backing plate. When you notice that backing plate is not moving anymore, you are going to counter-hold that spindle with the wrench and break the tension holding the backing plate. Then spin the backing plate to the left this is counter-clockwise until it comes off from the machine.
When backing plate comes off notice that it comes with the hook and loop surface, spindle thread and a little washer. Be cautious that don’t lose the washer. Because this washer needs to sit between the spindle thread and the sander machine. If you don’t use it look carefully that backing plate will not get correct clearance. That’s why you need to keep the washer.
Let we will change the backing plate to a 3-inch small polishing pad. Usually, pads come with a rubber cap to protect the thread from damage. Remove the rubber cap and keep the cap for future use. Now if the pad comes with a belt in the washer it’s fine. But there is no washer, then use the stock washer.
Now again grab the spindle of the machine with the wrench. Line up the pad thread on the spindle and start to screw it to fit on the sander. That time you will move the pad clockwise. Now hold the spindle and give backing plate more turn as required. Don’t super tight the pad, you just need to make sure that pad is not going to fall off from the sander while working.
You can watch the total procedure through this video.
Note: We don’t recommend the sander described on the video. To see our recommend DA sander click here.