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DS321 Type 2 Blacke&Decker sander - How to remove aluminum plate on bottom and also the driver roller.

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6ya6ya
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Posted on Jan 02, 2017

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rowdy45176
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SOURCE: My DS321 belt sander had the large drive

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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rowdy45176
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SOURCE: Black & Decker DS321 - ripped the rubber off

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.

Posted on Sep 12, 2010

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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!

remove-drive-roller-black-decker-p0oft2tnxmrbglxj03dvyxpv-1-0.jpg

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

Black & Decker 3X21'' belt sander (#7447)- pushed front roller in to put on new belt, can't get it to spring back out. Jim in Flippin


I have one of those and I just smack the front roller ahead with a brass or plastic hammer. I hit the movable bracket that the roller is attached to. It takes a pretty stout whack to do it though. hope this helps you

Jan 14, 2010 | Black & Decker 3 x 21 In. Dragster Belt...

1 Answer

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.


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

Jul 20, 2009 | Black & Decker 3 x 21 In. Dragster Belt...

2 Answers

Describe your Black & Decker BR318


This is a good sander but no portable belt sander is really a floor sander.

Jun 13, 2009 | Black & Decker BR318 3" x 18" Belt Sander

1 Answer

I have a type 2,#92 heavy duty sander,length of right angle sander is 14".. approx 35 years old............need brushes. whee can I find these please...


First try Black & Decker Serves Department. At some Hardware stores (ACE, True Value, etc)they stock brushes in the back room.

Jun 12, 2009 | Black & Decker 4.3A 6" Heavy Duty Right...

2 Answers

Belt won't stay on belt sander


Check first that you have retensioned the belt... i.e. when you removed the other belt, you would have had to pull on a spring-loaded lever to remove the belt tension before you added the new one... make sure the tension lever is flipped back in to ensure the new belt is tensioned...

Next, and the likely problem you are having, is belt tracking... There should be an adjustment knob up near the front of the sander near the front roller, either on top of the front part of the sander, or to the side near the front roller... When you turn this knob, it makes the belt track either left or right over the sander's base. This knob will allow your belt to run square and true and not spin off to one side...You need to adjust the tracking using this knob while the belt sander is running and with the new belt tensioned and in place, so turn the sander upside down, and power it on with one hand, then turn the knob with the other hand whichever way is needed to have the belt track square and in the middle of the rollers. Make small adjustments on the tracking knob to begin with. They can be sensitive at times.

That should stop your belt spinning off to one side.

Mar 18, 2009 | Black & Decker Tools & Hardware - Others

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