Question about Black & Decker 3 x 21 In. Dragster Belt Sander

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My DS321 belt sander had the large drive roller(and belt)came off on the first extended use. Looking at an IPB no thrust washers were found either.

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I would recommend going to Dewaltservicenet.com and typing in your model number and on the next page find the type number for the tool. I took a guess and found 2 thrust washers for the DS321. Let me know if you need more assistance and I will try and help

Posted on Jul 20, 2009

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1 Answer

I have a Makita belt sander,just replaced belt tensioner system including springs and roller but belt drive roller still keeps stopping on relatively light load even though the motor is running


very good trade tool

how quickly is it getting hot
slowing motor could be the cause

motor bushes and bearings can be replaced
did the motor drive belt under the cover get replaced
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Jun 02, 2016 | Makita 9911 Compact Lightweight 3" X 18"...

1 Answer

How to install drive roller on my makita 9401 belt sander


DONT forget to order and replace also allways the sinter bearingbus on the machine because to protect you from a dissapointment because otherwise the belt will turns off and cant be (good) controlled again , replace the drive roller allways and clean the front roller axle if its only dirt on the front roller use a little sillicon grease film on the front behind can use a little bit more sillicon grease between the axle rings and new bearing bus. remove the dry grease in the driving gear space and renew the lubricant in it with a multipurpose grease .

Sep 04, 2014 | Makita 9404 4'' x 24'' Belt Sander

1 Answer

How to remove a drive roller on a black & decker ds321 type 2


Just finished the exact thing, so here's the read deal:

- The screws on the drive roller ARE reverse thread.
- My old roller got too hot and separated from it's metal core, leaving the core tightly screwed onto the drive shaft. If you can unscrew it off of there (unscrew = clockwise!), just screw the new one back on. If not, you are going to have to take the sucker apart, but it's not too bad if you follow this, now that I did it the hard way:
-- You need to remove the belt plate assembly. It's only 4 screws: an obvious one recessed between the drive roller and the red belt-tensioner lever (see picture, white arrow), then two on the other side next to the black belt straightener knob (see 2nd picture, black arrows), right next to each other. Finally, you have to unscrew the black belt straightener knob (2nd picture, red arrow) all the way out so it will release the belt holding plate assembly, which should then slide out.
From here, you can hold the drive shaft firmly while you reverse-thread unscrew the old drive roller (or it's remaining pieces) and put on the new one. I had to cut mine off with a Dremmel tool it was on there so tight!). BE CAREFUL NOT TO DAMAGE THE COG THREADS ON THE DRIVE SHAFT; hold it with slip-lock pliers and a heavy rag or something to prevent damage.

Good luck!

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remove-drive-roller-black-decker-p0oft2tnxmrbglxj03dvyxpv-1-2.jpg

Oct 16, 2013 | Black & Decker 3 x 21 In. Dragster Belt...

2 Answers

I have a Black & Decker sander, model # 7447 and am having problems changing the sand paper.


The 7447 does not have a release lever. To change the belt, you must release tension of the rollers by pushing the front roller straight back until you hear it click and lock in position to change paper. Remove old paper and replace with new paper. Make sure if new paper has directional arrows to install properly.
Now you must release the front roller to put tension on paper. To do this push the front roller from the side that has the adjustment screw. This will release the front roller and allow it to go back into position. Be careful as it pops back quickly and with some force.
Turn on sander and adjust centering of paper with adjustment screw found near the front and side of sander.

Jun 13, 2011 | Black & Decker Garden

1 Answer

Black & Decker DS321 - ripped the rubber off the drive roller. Now got it in pieces, all cleaned up, but I dont see how to remove the driver roller from the Drive Shaft and belt guide assembley.


looked at a schematic and the drive roller screws onto the drive shaft, I don't see where is a locknut on the outside but the shaft is threaded, it moght be left hand thread. If there are 2 holes in the gear see if you can find a spanner wrench from a grinder and secure the roller and loosen the gear.

Sep 12, 2010 | Black & Decker 3 x 21 In. Dragster Belt...

1 Answer

How do I change the sanding belt on my 7447 belt sander


To change the belt, you must release tension of the rollers by pushing the front roller straight back until you hear it click and lock in position to change paper. Remove old paper and replace with new paper. Make sure if new paper has directional arrows to install properly.
Now you must release the front roller to put tension on paper. To do this push the front roller from the side that has the adjustment screw. This will release the front roller and allow it to go back into position. Be careful as it pops back quickly and with some force.
Turn on sander and adjust centering of paper with adjustment screw found near the front and side of sander.

Aug 27, 2010 | Black & Decker 3"x21"HD Vs Belt Sander

1 Answer

Sander Belt keeps slipping off.


what I would do is using compressed air clean the underside as best you can there might be a buildup of dust not allowing the yoke to extend fully, then look at the condition of the rear roller, is should have a crown in the middle, make sure the belt tracking mechanism moves freely and I believe there was a plastic cap over the screw head to push the yoke. If it is not there it might be part of your problem. Lastly make sure if you are using directional belts that they are installed correctly, You can find a breakdown for this tool at Makitatools.com

Jun 09, 2010 | Makita 9404 4'' x 24'' Belt Sander

2 Answers

How do you replace the drive belt on a ryobi type be321


I tried the model number and can't find it on their site, but if this is a belt sander or planer you can "roll" the new belt in place without loosening anything. If this is another tool let me know and please give me all the information (tool type) and I will check further.

Aug 23, 2009 | Ryobi Tools & Hardware - Others

2 Answers

How do you replace the drive belt on a Porter Cable Belt Sander


There is a lever on the side at the front right near the roller that you can use to release the spring tension on that roller (moving it slightly to the rear).  Once the tension is released you can slip the sanding belt onto both rollers from the side.  Release the lever and the spring will put tension on the belt to hold it in place.  Use the knob on the left side to center the belt on the roller if it starts to slip sideways when in use.

May 28, 2009 | Porter Cable 361 3" X 24" Sander

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