Question about Dewalt DW421 5'' orbital sander

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Variable speed control

Dewalt 423 vs sander . The varabile speed is shot and no parts .All I got was a N/a . how to override the speed control and make it a single speed.

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  • ricdean Mar 12, 2009

    Also having problem with varible speed control on my DeWalt 423vs sander. The site ToolpartsDirect.com has a replacement part for it for a Big $40.00. Would also like to make it single speed.

  • RM399 Apr 07, 2009

    I have the same problem, variable speed control is defective, part cannot be replace.

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1 Suggested Answer

seanpwright
  • 2030 Answers

SOURCE: Dewalt DW433 belt sander stop working, why?

Check the brushes for the motor they may have gone bad or broken, I have seen this happen before on dewalt tools.

Posted on Apr 02, 2010

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2 Answers

Palm sander


The answer "Go to Dewaltservicenet" can be confusing - the actual site is servicenet.dewalt.com and even then, entering your part to get to manual can be infuriating. This is the link for the current model which, for all intents and purposes, is the same. The link to the helpful page is: http://www.dewalt.com/tools/woodworking-sanders-orbital-sanders-d26441k.aspx . You'll get a pop-up box with a dropdown that has a few numbers, nothing else. Just click on "1" and ignore language that indicates that this model has more than one - it does not. After you click on "1", the pop-up disappears that you're on the d/l page. Downloads are in the upper right corner. You want "Instruction Manual".You should get to this page: http://servicenet.dewalt.com/Parts/Browse#6229 but may not, it's very glitchy. On this page, you'll want to make sure "Sanders" is on the left and "sheet" is on the right. If you try to get the Manual from the DW411 page, a blank page will open. Make sure your pop-up blocker is off or that you allow dewalt.com. The instructions for the d26441k are identical to the dw411 - same technique for loading sanding sheets, same rods, etc. I've uploaded the d26441k page manual .pdf so that should help. It's easy to get lost on the Dewalt site while trying to find somthing so simple. :)

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1 Answer

No powerto sander. Cord is good,switch is good and brushes are long


It sounds to me that you have used the sander a lot and the vibration has broken a wire or it's about to break on the field windings. The brushes you need to look at to see if worn. But I kind of think wire problem. I had this happen on mine and opened it up to find this is what happened. The sander would be turned on and would not operate until I turn upside down and it would work. This is great if you are sanding upside down but this is just a sign that you are on borrowed time as this will eventually not turn on at all. I was able to fix mine with new wire crimp connection and solder with heat shrink material. If not you can order new field winding if this is what is wrong. Cleaning up the sander won't hurt either. You might want to see what a new sander will cost vs. part. Good Luck!

Aug 23, 2012 | Dewalt Sander,random Orbital - DEWALT

1 Answer

Dewalt DW433 belt sander stop working, why? While sanding shutters, my sander just stopped. Any fixes?


Check the brushes for the motor they may have gone bad or broken, I have seen this happen before on dewalt tools.

Apr 02, 2010 | Dewalt DW433KT Heavy Duty 8 Amp 3 Inch By...

1 Answer

Bosch ROS not powering on


Checked the net for answers and got a couple of maybe's. 1.) Brushes, 2.) variable speed control, which some were direct wiring.
I tried the brushes firs and that has solved the problem for now. I guess the brushes stuck or somehow lost contact.
I got a parts diagram and found the brushes (will be covered with dust). Took the springs out and stretched them a little, replaced and the sander turned on. You will need to remove the top cover to do this. Verdit is still out as to long term performance. Not a great start.

My particular sander was lightly used (second project) and it has not been abused.

Jul 11, 2009 | Bosch 1295DVS 5" Palm Variable Speed...

1 Answer

The belt slips off my Belt Sander


All sander will have two adjustments. The first is to release the sanding belt by retracting the position of one of the rollers. The second adjustment moves one of the rollers belt tension from side to side. The roller angular position is changed, sometime by a single knob or screw, and sometimes by two separate adjusting screws.

Jun 19, 2009 | Dewalt DW433KT Heavy Duty 8 Amp 3 Inch By...

1 Answer

Intermintly will not come on


Take the brushes out, inspect them, and blow out the whole tool with compressed air.

Mar 17, 2009 | Dewalt D26453 3 Amp 5 Inch Variable Speed...

1 Answer

Speed Control Question


When you are finishing the surface of wood, it's vital to maintain control. Work too fast or too slow and you risk ruining your hard work with unsightly scratches

Aug 27, 2008 | Coleman Powermate 024 0091CT High Speed...

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