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Model#: DEWNDWE6421K

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Dewalt DWE6421K 3 Amp 5 in. Random Orbital Sander Kit

  • Dewalt DWE6421K 3 Amp 5 in. Random Orbital Sander Kit
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Complete with a dust bag and carrying case, DEWALT's DWE6421K 3 Amp 5 in. Random Orbital Sander Kit features a powerful motor and 12,000 orbits per minute to deliver smooth performance in a variety of sanding applications and an ergonomic design for comfort as you work.
  • 3.0 Amp motor that spins the pad at 12,000 OPM
  • Shorter height allows the user to get closer to work piece
  • Rubber over-mold in all of the critical areas of the sander for comfortable use
  • Separate counterweight design reduces vibration for decreased user fatigue
  • Dust-sealed switch to protect against dust ingestion for longer switch life
  • Improved dust collection and interfacing with vacuum locking system
  • Dust bag has patented one-hand locking system
  • 3 Amp 5 in. Random Orbital Sander - DWE6421K
  • Dust Bag
  • Carrying Case (Bag)
  • Owner's Manual
Compliance and Restrictions
warning: This product can expose you to Lead, which is known to the State of California to cause Cancer and Birth Defect/Reproductive Harm. For more information go to


Weight: 2.9 lbs.
Amperage: 3A
Batteries Included: 0
Cord Length: 6 ft.
Disc Diameter: 5 in.
Dust Collection: Yes
OPM: 12000
Paper Type: Hook and Loop
Voltage: 120V



4.6 / 5.0
12 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Yes, I would recommend this to a friend (5)
Powerful (4)
Ergonomic Design (2)
Easy To Use (1)
Value (1)
Uncomfortable to Use (1)
Best Uses
Frequent Use (3)
Small Projects (2)
Comfortable and powerful
I love this sander for the power and way it feels in my hand. My one complaint is the dust bag attachment design makes it pretty difficult to hook vacuum to. Other than that awesome sander
This review was collected as part of a promotion
November 19, 2018
Originally posted at
DeWalt Quality
When it came time to renovate my basement, I knew I would need to update my old DeWalt 18v tools.

My wife gave me clearance to buy every tool I would need.

I’ve always been a fan of DeWalt, so it was an easy choice.

I needed a new sander and I wanted one that has the hook/loop fasteners to attach the sandpaper.

I liked it so much, I bough two of them.

My only regret was not knowing that a 20v cordless model is available.

If you are reading this, just buy it. You will not regret it.
This review was collected as part of a promotion
November 16, 2018
Originally posted at
Great sander
This tool has been so useful for me over the last few months, the internal vacuum works great. I do wish the connecting hose was more universal to hook to my vacuum though.
This review was collected as part of a promotion
November 15, 2018
Originally posted at
MUST HAVE for woodworkers!
I bought this about a year ago and it is my go to anytime I need to smooth out any project I am working on
This review was collected as part of a promotion
November 14, 2018
Originally posted at
Great little sander
First sander I have owned and I love it. Easy to use, fits my small hand and does a great job.
June 19, 2018
Originally posted at
best sander i ever had
i bought this sander this past weekend,and love it.
April 18, 2018
Originally posted at
seems like a good product
I just bought this sander several days ago. It works well and I am relatively happy with it. One drawback, which I feel may develop into a serious problem, is after sanding for several minutes the "hook and loop" pad which holds the sandpaper disk in place will not hold the disk on any longer and the sandpaper disk falls off. Then the disk will not stay on the pad at all.
March 31, 2018
Originally posted at
Yes, I would recommend this to a friend
Easy To Use
Ergonomic Design
Best Uses
Frequent Use
Second sander....
I bought this to put in my camp workshop where I do a lot of pallet furniture and displays. It's seriously heavy duty and knocks the high spots off the hardwood pallets in a hurry. As long as I let it do all the work, it will likely outlast me......
April 9, 2017
1 year ago
Describe Yourself:
Avid Do-it-Yourselfer
Yes, I would recommend this to a friend
Uncomfortable to Use
Best Uses
Small Projects
For me, a giant step backwards
I'm torn on this sander. The sander itself is what I expect from DeWalt but their dust collection port leaves much to be improved again. If you use a DeWalt dust collector you may give this sander 5 stars, but if you need to adapt it to a different dust collector, like I do, you may want to select a different brand of sander. In order to connect your collector you will probably have to either cut up your hose or stack up a 3 adapters that is rather unwieldy. Neither is a good choice. I'll keep this sander, but wouldn't have purchased it if I had known the problem with the hose.
February 13, 2017
1 year ago
Describe Yourself:
Yes, I would recommend this to a friend
Ergonomic Design
Best Uses
Small Projects
i like it
this is a great sander at a great price. smooth operation, not super loud, easy to control
December 12, 2016
over 2 years ago
Describe Yourself:
Avid Do-it-Yourselfer

Questions & Answers

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Browse 6 questions Browse 6 questions and 7 answers
how to adapt a dust collector hose to it. is there an adaptor to do this?
A shopper on Jul 24, 2017
The sanding disks no longer stick to the pad and the pad looks normal. can I treat it somehow?
RICKEY on Jun 19, 2016
BEST ANSWER: The sandpaper will eventually wear out and not stick. The pad on the sander may wear out, as well, and need to be replaced. That happened to another sander I owned, not a DeWalt.
Good luck!
I am looking for a replacement pad for a De Walt # 370916
Richard on Jul 23, 2016
BEST ANSWER: For help locating parts, please use the link provided below:
I am looking to order a Dewalt sander replacement pad for Dewalt DWF6421 orbital sander
Rog on Apr 19, 2016
BEST ANSWER: The pad assembly is part number N329079
I am looking for a replacement dust collection bag for an older DW421 model serial # 344448
Please advise if this is available and if so how do I order it?
Thank you.
Ken Adams
Ken on Nov 30, 2015
BEST ANSWER: For help with replacement parts, please contact Dewalt directly at 800-433-9258
How to clean the hook and loop pad?
A shopper on Feb 26, 2017


Most DEWALT® Tools purchased on or after January 1, 2004 come with a warranty package that includes:

Three-Year Limited Warranty. DEWALT will repair, without charge, any defects due to faulty materials or workmanship for three years from the date of purchase. This warranty does not cover part failure due to normal wear or tool abuse. For further detail of warranty coverage and warranty repair information, visit or call 1-800-4-DEWALT (1-800-433-9258). This warranty does not apply to accessories or damage caused where repairs have been made or attempted by others. This warranty gives you specific legal rights and you may have other rights which vary in certain states or provinces.

One-Year Free Service Contract. DEWALT will maintain the tool and replace worn parts caused by normal use, for free, any time during the first year after purchase.

90-Day Money Back Guarantee. If you are not completely satisfied with the performance of your DEWALT Power Tool, Laser, or Nailer for any reason, you can return it within 90 days from the date of purchase with a receipt for a full refund - no questions asked.