#1 Home Improvement Retailer

Internet #100348934

Model #DS321 1

7 Amp 3 in. x 21 in. Dragster Belt Sander

  • Delivers excellent surface contact for polishing
  • Collection bag for sawdust ensures a clean work area
  • Adjustable handle ensures controlled hold and optimum grip
  • View More Details
How to Get It

Frequently Bought Together


Product Overview

The BLACK+DECKER 3 in. x 21 in. Dragster Belt Sander features a low-profile design that extends the reach of the belt and delivers great contact with the surface being sanded. It has a maximum belt speed of 800 ft. per minute for powerful sanding. The retractable locking hood exposes the top of the sanding belt for use in a variety of applications.
  • 7 Amp motor for heavy duty operation
  • Lock-on switch for your convenience
  • Single-action belt release lever that makes changing belts fast and easy
  • Front wheel that sits low to sand close to the edges of adjoining surfaces
  • Dust collection bag that helps keep your work area sawdust-free
  • 6 ft. power cord
  • Adjustable 3-position handle that helps maximize control and comfort
  • CSA listed
  • 2-year manufacturer warranty
  • Adjustable 3-position handle helps maximize control and comfort
  • Click here for more information on Electronic Recycling Programs

Additional Resources

From the Manufacturer

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.



Belt width
Product Depth (in.)
15 in
Product Height (in.)
6 in
Product Width (in.)
6 in


Amperage (amps)
Belt length
Color Family
Cord Length (ft.)
Corded Tool Type
Belt Sander
Dust collection type
Maximum speed (ft./min.)
Minimum speed (ft./min.)
Power Tool Features
Lock On Switch,Two Hand Grips
Product Weight (lb.)
Tools Product Type
Power Tool
Variable Speed

Warranty / Certifications

Certifications and Listings
CSA Listed
Manufacturer Warranty
2 Year Warranty

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

  • 3.8
    out of 215 reviews
  • 71%recommend this product
Filter by:
Showing 1-10 of 215 reviews
Cheap belt sander
Owned this for approximately 2 years. Only used about five times. Today the bearing went bad, ball got loose and damaged the armature. During tear down I noticed that the gear box was not sealed and contained a lot of sanding dust. Just not quality parts nor design.
    A Great Choice
    I own couple of sanders and they fit my skill level and the jobs I take on. I am a intermediate level weekend woodworker with 50+ years of furniture build and restoration. BD has always worked for me.
      • Recommended
      Love the sander. This is my second one
      Love the sander. This is my second one
      • Verified Purchase
      • Recommended
      1 found this review helpful
      Performed with Excellence!
      Sanded 3 decks and performed without a flaw. Used 36 grit, 80 grit, and 100 grit to finish. Excellent value for cost.
      • DIY
      • Verified Purchase
      • Recommended
      7 found this review helpful
      Dragster Belt Sander
      The belt sander was light weight and easy to use for small projects, however the front pulley guide did not last. It wore out after only15 hours of use. It is not designed for heavy duty use.
      • DIY
      8 found this review helpful
      GREAT belt sander
      I really can't complain about this belt sander. I used it for something that it really should NOT have been able to do and it worked GREAT... I used it to sand 70 yr. old hardwood floors. It took 3 days and a boat load of dust (albeit the sander actually collected most of it in the bag... you just have to empty the bag every 25 sq. ft. or so), but my floor looks GREAT. I haven't put my 2 coats of poly on there yet, but WOW. I'm uploading a before and after photo for those who want to see. The before photo was taken 2 years ago with a different camera but you should still be able to get the jest of the improvement. It's PHENOMINAL! Took away 70 years worth of caked on brown grime, filth, & stains. BTW, I returned the Ryobi 6 amp yellow sander (3 x 18 inch) to get this one. It didn't work any where NEAR as well, surprisingly...
      • Pro
      • Recommended
      22 found this review helpful
      Good sander at a great price
      I have found this to be an excellent product for the price. Is it the best belt sander in the world? No...but then again, it's also $60, no $200+. I bought this primarily to speed up a project of building a solid workbench top from 2x4's, and it did exactly what I needed it to do....smooth out the top of the bench quickly. The most common complaint seems to be with the tracking...yes, it could be better, but it's not as bad as people are making it out to be...before you start using it, spend 30 seconds adjusting the tracking and you're set...once adjusted I didn't touch the tracking for the whole time I was using it (about 2hrs). I also have found the speed and 7amp motor more than sufficient for anything I'm going to use it for. Really, my only complaints are minor for a sander in this price range. One is the abundant use of plastic. There are some areas, such as the belt tension adjustment lever, that are plastic when I feel they should be steel. I can see this breaking if used heavily and the user isn't extra careful. My other complaint is the dust collection system. It's a complete joke...my workbench was covered in sawdust mere seconds after I started sanding. To be honest, I didn't really expect it not to be, and it didn't make the sander any less effective, but to advertise "dust collection bag helps keep your work area sawdust free" is completely false. Overall I'm very happy with this purchase. If you need a belt sander for everyday use, spring for a higher-end sander...but, if like me you have the occasional home project that calls for one, this should get you by, and for $60, you can't really go wrong.
      • DIY
      • Recommended
      15 found this review helpful
      Awesome sander
      We narrowed down our results faster by checking out the label, this had a bigger motor and bigger belt. We took this bad boy home and put it to the test, we were finished with each piece of wood in no time. I mean zip in zip out. Over all, this sander exceeded our expectations!
      • DIY
      • Recommended
      2 found this review helpful
      • Verified Purchase
      Sanding Belt came flying off. Broke after 6 uses.
      I was using a 50 grit sanding belt to remove polyurethane and stain. To help extend the life of the sander, I highly recommend vacuum cleaning both the inside and outside of the sander about every 3 sq. ft. Even with vacuum cleaning the sander, the tracking roller became impacted with saw dust and it stopped tracking the sanding belt - so much so - that the sanding belt would come flying off. The tracking feature barely works now. You also might find this Youtub video helpful in solving the tracking problem. https://www.youtube.com/watch?v=A9k1kubmNUA&t=12s. This product is poorly engineered and is not durable.
      Response from DewaltProductExpertJan 7, 2022
      We appreciate your feedback on the DS321 and are sorry to hear about the issue you are having with your product. This is not the kind of performance we expect from our products and would like to speak to you about this issue so we can assist you in resolving this to your satisfaction. Please email me at wecare@sbdinc.com and reference case # 3608912. I look forward to hearing from you.
      Jennifer, Black and Decker Customer Care
        Showing 1-10 of 215 reviews