Porter-Cable 390K 5-Inch Low Profile Random Orbit Sander Kit with Hook & Loop Pad and Dust Collection
by Porter-Cable
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Product Details
Manufacturer: Porter-CableModel: 390K
Product features:
- 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
- Mirka 23-615-100 5" 8-Hole 100 Grit Dustless Hook & Loop Sanding Discs - 50 Pack
- Mirka 23-615-080 5" 8-Hole 80 Grit Dustless Hook & Loop Sanding Discs - 50 Pack
- Mirka 23-615-120 5-Inch 8-Hole 120-Grit Dustless Hook and Loop Sanding Discs, 50-Pack
- Black & Decker WM225 Workmate 225 450-Pound Capacity Portable Work Bench
- Triton SJA200 Superjaws Workbench
Description of Porter-Cable 390K 5-Inch Low Profile Random Orbit Sander Kit with Hook & Loop Pad and Dust Collection
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.
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 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. |
 Rubber grip and ergonomic features provide comfort during extended jobs. View larger. |
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, 5-inch hook-and-loop pad with eight-hole pattern, rugged storage case, and user manual.
Tools and Hardware Reviews of Porter-Cable 390K 5-Inch Low Profile Random Orbit Sander Kit with Hook & Loop Pad and Dust Collection
Customer Review: Porter-Cable hits it out of the park!
Summary: 5 Stars
I have used over six Porter-Cable random orbit sanders and always have at least four on hand for use on my Marquetry work. I have found that the P-C's had the least vibration (though still more than I wanted) and the smallest orbit pattern. However, they do wear out after about two years of heavy use. Now, Porter-Cable comes out with the 390K which is almost twice as expensive, but claims to be extremely low on vibration, and doesn't bog down when heavy pressure is applied (this, a no-no, as it causes premature wear.) The "experts" say heavy pressure does not mean more stock removal, but I have found this to be inaccurate. Heavy pressure, at least with the Porter-Cables in the past, does remove more stock, but leaves pronounced swirl marks that have to be eliminated through progressivly finer grits, reducing pressure as the grit size becomes finer. Because I keep several sanders at ready with different grit sizes, this is not an issue to me, as I find the resultant time spent is still less over-all, than if I tried to do the initial stages with "light" pressure.
I purchased the 390K to see if the claims were even somewhat close to believable. To my great delight, the claims of smooth operation and excellent stock removal are not only true, but I believe have been understated! I have used it daily for over two months and it continues to perform flawlessly. The vibration level truly is the lowest of any Orbital I have ever used and the stock removal is fantastic. The resultant swirl marks are also less intense in the coarser grades of paper. Only 'cons' I have are 1) the price (though certainly worth it), and 2) the fact it comes with the 8-hole h&l pad. I prefer 5-hole because you get a little more surface area of grit on the work piece, and I use a vacuum dust exhaust so the extra holes are meaningless to me. I obviously don't know how long this new model will last compared to my other P-C's, but I suspect it will be longer. Even so, the additional cost over the earlier models is money well spent.
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