Best Books of the Month Shop Men's Shoes Learn more nav_sap_plcc_6M_fly_beacon Janet Jackson All-New Fire TV Stick with Voice Remote Grocery Amazon Gift Card Offer jrscwrld jrscwrld jrscwrld  Amazon Echo Starting at $49.99 Kindle Voyage AutoRip in CDs & Vinyl Fall Arrivals in Amazon Outdoor Clothing Learn more
Currently unavailable.
We don't know when or if this item will be back in stock.

Have one to sell? Sell on Amazon

PORTER-CABLE 390K 5-Inch Low Profile Random Orbit Sander Kit with Hook & Loop Pad and Dust Collection

89 customer reviews

Currently unavailable.
We don't know when or if this item will be back in stock.
  • Enter your model number above to make sure this fits.
  • 3.5 Amp EnduraTech Motor for increased performance and durability
  • Electronic Load Control for 42% faster material removal
  • EnduraTech Motor Technology has 71% fewer wear components for 5-10 times longer motor life
  • Electronic motor brake reduces spin-down time by 73% for increased productivity; Mechanical pad brake reduces free-spin to virtually eliminate gouging
  • Integrated dust port accepts 1- and 1-1/2-inch vacuum hoses; includes kit box
  • Kit includes cloth dust cover
See more product details

DIY Deals in Tools & Home Improvement DIY Deals in Tools & Home Improvement

Currently unavailable. We don't know when or if this item will be back in stock.

Technical Details

  • quiet

Product Description

Efficient, thorough, and easy to control, the Porter-Cable 390K Low-Profile Random-Orbit Sander has a low center of gravity for the close to the work feel of an air sander with the convenience of a standard electrical plug. Its 3-1/2 amp ENDURATECH brushless motor ensures robust, time-saving performance on a variety of materials, including red oak, pine, and poplar. The sander also features integrated dust collection that keeps your workspace cleaner and healthier.

callout box top
390K Low-Profile
Random-Orbit Sander
At a Glance:
  • Low-profile sander with a low center of gravity for a 'close to the work' feel

  • Variable speed range of 7,000 to 12,000 rpm for optimal removal rate

  • Integrated dust collection for a cleaner workspace

  • Three-year warranty
callout box bottom
Black and Decker Porter-Cable 390K Low-Profile Random-Orbit Sander

Remove paint or sand wood to a fine finish with the orbit sander's variable speed range of 7,000 to 12,000 rpm. View larger.

Porter-Cable 390K Low-Profile Random-Orbit Sander

Rubber grip and ergonomic features provide comfort during extended jobs. View larger.
Robust Performance in a Compact Package
The 390K is a powerful, compact sander ready to take on a variety of heavy-duty jobs. It's ideal for aggressive sanding, coating removal, leveling seams, smoothing rough material, solid surface work, and boat-bottom cleanup.

ENDURATECH Motor for Improved Productivity and Durability
The 2008 winner of the WOOD Magazine Top Tool Award, the 390K boasts ENDURATECH brushless motor technology for 70 percent fewer wearable parts, which increases the motor life by up to 10 times when compared to traditional palm-grip sander motors. The result is greatly improved productivity, durability, and control.

Low-Profile Design for Optimum Control
The 390K sets a new standard for palm-grip sanders. Its low-profile design is 30 percent shorter than the competition. This means you'll get optimum control and finish, as well as comfortable handling on the job.

Variable Speed Range for Versatility and Precision
Versatile and powerful, this sander has a variable speed range of 7,000 to 12,000 rpm for optimal removal rate on a variety of materials. Electronic load-control monitors the rpm and maintains a constant operating speed for smooth sanding and over 40 percent faster material removal.

Innovative Brake Designs Save Time and Reduce Free-Spin
Also, the 390K saves you time with its innovative electronic motor brake, which reduces spin-down waiting from close to 10 seconds to approximately 3 seconds.A separate mechanical pad brake reduces free-spin--effectively putting an end to gouging, and a 3/32-inch orbit diameter means this sander can handle a range of materials with ease.

Compact, Ergonomic Design with Integrated Dust Port
The 390K measures 4 by 5 by 12 inches (W x H x D) and weighs just 2.1 pounds, so it's compact and easy to store. Its rubber grip and ergonomic features maintain user comfort, even during extended jobs.

For further convenience, an integrated dust port accepts 1-inch and 1-1/2-inch vacuum hoses for optimal dust collection. This makes your workspace cleaner and healthier and helps maintain good visibility of your workpiece.

Warranty Information
The 390K is backed by a three-year warranty.

What's in the Box
Random-orbit sander kit including a cloth dust cover, 5-inch hook-and-loop pad with eight-hole pattern, rugged storage case, and user manual.

Product Information

Technical Details
Part Number 390KR
Item Weight6.4 pounds
Product Dimensions15.4 x 7.2 x 9.2 inches
California residentsClick here for Proposition 65 warning
Item model number390K
Item Package Quantity1
Special Featuresquiet
Included Componentsbare-tool; attachments
Warranty Description3 Year Limited Warranty
Additional Information
Best Sellers Rank #212,774 in Home Improvement (See top 100)
Shipping Weight6.4 pounds
Domestic Shipping Item can be shipped within U.S.
International Shipping This item is not eligible for international shipping. Learn More
Date First AvailableJune 22, 2008
Warranty & Support

Product Warranty: For warranty information about this product, please click here

Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

126 of 127 people found the following review helpful By Stephen J. Soldo on August 21, 2008
Verified Purchase
Intrigued by the design, I purchased this sander. Overall, I am very pleased with it. Here are the pros and cons:

Pros: Lower center of gravity makes it a delight to use. Feels more natural, like a sanding block. This is a very, very powerful sander, and the constant response motor prevents the sander from bogging down with pressure--no matter how hard or soft you apply pressure to the workpiece, the power is always there. The quick stop feature is a great innovation--you don't need to wait for it to stop or use a "sander sitter". The benefit of all of this is that you get A LOT of sanding done in much less time, compared to other 5 inch orbital units (e.g. Bosch).

Cons: (reason for 4 stars and not 5) Two, that are greatly overshadowed by the PRO's above, but issues nonetheless. The biggest problem is the receptacle for dust collection. It only takes that stupid Porter Cable dust hose that is horribly inefficient due to the small size of the hose. The hose is functional and does suck up dust, but could be better. I had one of these hoses laying around from my biscuit cutter, but it is still a lousy design. Maybe I can Jimmy up some type of setup for a better hose with an adapter.

The next con is that the top of the unit is somewhat broad and a little difficult to "palm" without some hand fatigue, but I am getting used to it. This ergonomic shortcoming is somewhat compensated by less fatigue by the lower center of gravity, but not entirely. The more standard units have a smaller top that is easier to get your hand around.

I would definitely buy the item again. It is a very useful tool.
1 Comment Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback. If this review is inappropriate, please let us know.
Sorry, we failed to record your vote. Please try again
43 of 43 people found the following review helpful By Clyde Bouley on October 3, 2008
Verified Purchase
I just received my orbital sander (Porter-Cable 390K) a few weeks ago. I bought this sander based on a review in one of the recent wood magazines. Removed it from the box, put some sandpaper on it and away I went. I sanded Oak, Pine and Popular. I used 80, 120, 150 and 220 grit sandpaper and was pleasantly pleased with the results. My biggest concern having my shop in the basement was dust. I've got three other orbital sanders and had to do all my sanding outside. But that is not the case any more. I tried the sander with the dust collector on and then with my Shop-Vac. The dust collection in the on board collector was very good just a small amount of dust left on the bench. For very small, short jobs I would use this method. For larger, longer jobs my Shop-Vac will be used, from what I could tell there was no dust left behind (in both cases if I wiped my hand a crossed the board and there was wood dust. The dust I was talking about was on the bench and in the air, boards have to be whipped clean with a tack cloth. This is one of the few electric tools that I can use the Shop-Vac 1¼ "hose with no adapters and it works like a champ. The noise is very low and the vibration was low also. I wear a medium glove (my fingers are a bit short of the ends) and I found this very comfortable to use. I had complete control and the low center of gravity made it very maneuverable. On high speed this was very aggressive, thus the advantages of speed control and a light touch. I would recommend this sander to all. Overall the only problems I see is the little dust left behind with the on board collection system and price (time will tell if the price was worth it). By the way my other sanders are in storage until I need to do sanding outside.
Comment Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback. If this review is inappropriate, please let us know.
Sorry, we failed to record your vote. Please try again
40 of 41 people found the following review helpful By John E. Dinger on September 18, 2008
Verified Purchase
This review comes about after 10 hrs of real world use of the new sander. The best new features are the quick spindown and the variable speed control. I'm a professional cabinetmaker, and I use the sander to sand between finish coats as well as typical usage. The low speed helps control burn through on flat surfaces and narrow edges using 320grit. The low profile and slight increase in power are the second best new features. The only thing I'm not crazy about is the width of the grip. I have an average hand size and it's a bit wide and not what I would call ergonomic. I would have also put the speed control in a easier to reach place, so that I could control the speed with the same hand that I'm sanding with. The ergonomics become more of an issue when a vacuum hose is hooked up to the sander. It's that little extra pull of weight that makes the job more tiring when your sanding for multiple hours. It's also worth noting that the sander vibrates less that the last version and is a couple of decibles quieter that the 333. I would have given five stars if the sander were more ergonomic.
Comment Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback. If this review is inappropriate, please let us know.
Sorry, we failed to record your vote. Please try again
22 of 22 people found the following review helpful By Lorraine S. Stanley on October 9, 2008
I'm a little baffled by the reviewers who said this sander was difficult to use unless you have large hands. I'm a 5'7", 125 pound gal who has what I think are normal size hands for the rest of me, and I have no problem at all using this sander. It's much lighter and less bulky than the machine I've been using (a Bosch). I work on wooden boats, and I think this is a great addition to the tool closet. The dust port is easy to hook into our existing vacuum system. It's one of the better adapters I've come across. I like that the speed adjustment dial is where it is. I hate turning the sander speed down inadvertently, just in the course of using the machine. This happens regularly with my Bosch and it drives me nuts. If I do want to adjust the speed, it's not difficult do so.

I love the electric brake; it makes changing sanding discs much quicker. My only complaint is that it doesn't seem to have quite the guts of the Bosch. I'll have to do some side-by-side tests when I've got some time to play, but my first impression is that it takes a little longer to do what I normally do. I don't understand how this could be, because the amps are comparable, as are the orbits per minute. It's possible that it's so much lighter and less bulky that I just think it's not as aggressive. I have a normal deficit of patience and I have a hard time making myself turn the Bosch down, even when I know I should. So maybe having a slightly less aggressive machine will save me from myself. I know my shoulders like it better.

All-in-all, I think it's a great sander. And I don't think you have to have large hands to use it comfortably.
2 Comments Was this review helpful to you? Yes No Sending feedback...
Thank you for your feedback. If this review is inappropriate, please let us know.
Sorry, we failed to record your vote. Please try again

Most Recent Customer Reviews