Question about Dewalt DW421 5'' orbital sander

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Break the sander spins so fast without the white break and when i put the break in, it strains the motor and does not function properly

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Posted on Dec 13, 2008

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1 Answer

Sander doesn't spin


YOUR BALLBEARING where the disk is on mounted is the right bearing that have the problem for shure it is full of dust or completely dry it will not turn anymore SIMPLY TO CONTROL IF YOU MOVE YOUR DISK NOW ON YOUR MACHINE YOUR ARMATURE TURNS DIRECTLY WITH THE DISK thats not good the armature must stand still , replace the ballbearing or remove it and open it with a very little sharp screwdriver on the both sides solvent it out try to turn the bearing carefully until its turns without problems dry it or blow it out with a compressor and if its dry lubricate with ballbearing grease close it again and mount it again

Nov 13, 2013 | Metabo SXE450 00458 6'' Random Orbit...

1 Answer

I have a Dewalt sander I am using for wet sanding on a boat hull. I have already burned one sander out do to moisture I figure is there a way to protect the new sander from this happening again I am...


Impossible not to get water in the bearings and motor. It is vibrating too fast. You need air sander. Or sand dry, then wet sand the primer by hand.

Dec 17, 2010 | Dewalt DW421 5'' orbital sander

2 Answers

My Model # 362 Belt sander keeps breaking belts after just a few minutes of continued use. Why?


This is usually indicative of someone pushing down on the sander too hard while sanding. The motor in this sander is strong enough to pull the belt around even with too much pressure on the sander. This causes excessive heat to build in the sanding belt and sander shoe which causes the belt to break down prematurly. It's also very hard on the sander's bearings and motor. Use an appropriate sandpaper grit that will do the job without excessive pressure on the worksurface. This will make your sanding belts and sander work longer and cooler.

Sep 13, 2010 | Porter Cable 362 12 Amp 4 Inch By 24 Inch...

1 Answer

Sandpaper will not stick to rubber bed bosch


This is generaly due to previous adhesive buildup on the backing pad OR, the face of the backing pad is breaking down and cracking.There are two ways to handle this. You can try scrubing the crud off the pad (I wouldn't) or, you can get a new backing pad for your sander. At this point, you might want to go with a velcro type pad or hook and loop as they call it (cleaner and no goop). Check your local home depot for pads. If you cannot find one, I would suggest you call Klingspor abrasives Co. They have area reps all over the United States. I know, as I used to be one of them.They carry,.. and will send you pads via UPS. Just make sure you don't try to put a 6in pad on a 5in sander or vice-versa as the pads are weight-mated to the sanders. If you do, you will burn up the motor in your sander rather quickly.

Jan 24, 2010 | Bosch Power Tools Sanders Orbital Sanders

1 Answer

Sander seems to struggle, doesn't run as fast as it used to. Air supply hasn't changed. Also, where can you buy parts if necessary?


I am not sure of a parts source, but you should consider putting some air tool oil and try to lubricate the air motor. It might be the problem ...a few drops in the air connection

Nov 19, 2009 | Hutchins HTN - 2000 Air Straight Line...

1 Answer

Replacing cord and switch on craftsman belt sander 315.117131. which connections (holes) do the wies go into on the switch? Thanks


the switch may have four holes two on top and two on the bottom. tin the cord leads with solder and push the white in one hole and the black in the other hole. the motor leads go into the top two holes one on either side. the switch makes and breaks both sides of the line.

Oct 25, 2009 | Tools & Hardware - Others

1 Answer

I ned the internal vein parts.


One of the cool things about the Dynaorbital Spirit sanders is that, they were designed to be the lightest sanders out there (as opposed to the Dynaorbital supreme). This is nice as it keeps hand fatigue to a minimum. Another cool thing about the spirit, is that it was designed to be able to change out the entire drive motor all at once. The drive motor being the rotor with the vanes on it. These motors are available from dynabrade directly. replacing one vane only will tear the sander body up fast. I would recommend you get the replacement motor from them. They can be found here:http://www.dynabrade.com/dyn09/intro/selregmark/index.html

TIP: When replacing the motor, be very careful not to compress the sander body (i.e. bench vice).Dynabrade sells a rubber grip collar for this operation. then you just R and R (remove and replace) the motor and yer' good to go!!

May 12, 2009 | Dynabrade 59035 5 Non Vac Dynaorbital...

1 Answer

Motor & pulley


It would take 6" pully w/ a 2.25" which would not fit on that machine, no room for the 6". Replace with the same RPM motor is the proper way, unless you simply want a slower speed sander, duh! You cannot change the motor rpm without a defenant power issue, if you change the rpm your sander will power out, sorry?

Mar 30, 2009 | Tools & Hardware - Others

1 Answer

Disc pad stops


It could either be that the brushes partially burned I would check to make sure your brushes are in good shape and take it out of the helpers pay ;)

Nov 06, 2008 | Porter Cable 332K Quicksand Random Orbit...

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