LumberJocks

Random-Orbit Palm sander is posessed!

  • Advertise with us

« back to Power Tools, Hardware and Accessories forum

Forum topic by Tokolosi posted 03-16-2012 06:03 PM 1744 views 0 times favorited 11 replies Add to Favorites Watch
View Tokolosi's profile

Tokolosi

673 posts in 1110 days


03-16-2012 06:03 PM

Topic tags/keywords: sander orbital sander

I have a little 5” Black & Decker random orbit palm sander. It was fairly inexpensive and it has worked really well. However, last few times I used it it is acting super strange. I hope I can explain this; It spins, motor sounds good, gets up to speed adequately but it ‘bites’ into the wood if I apply any kind of pressure. I have to hold it just barely touching the wood. And of course that leaves gouges etc. If I apply pressure it either bites into the wood and bucks or it stops spinning braking the motor. And this is for any grit of paper I use and I tried different woods of varying hardness. The best analogy is like a car with clutch issues.

Does anyone know what may be wrong?

I have opened it and cleaned out all the dust and, with my untrained eye, could not see anything that looked wrong or broken.

-- “There is nothing like looking, if you want to find something. You certainly usually find something, if you look, but it is not always quite the something you were after.” ~ JRR Tolkien


11 replies so far

View chrisstef's profile

chrisstef

11489 posts in 1761 days


#1 posted 03-16-2012 06:53 PM

sounds kinda strange …. maybe try a piece of used up sandpaper on it and see if its still “biting” that may eliminate a couple of possibillities.

-- "there aren’t many hand tools as awe-inspiring as the #8 jointer. I mean, it just reeks of cast iron heft and hubris" - Smitty

View JNP's profile

JNP

106 posts in 1332 days


#2 posted 03-16-2012 07:06 PM

My dewalt did something similar…there is a small plastic “brake” that sits below the pad that needs replacing. It is super cheap plastic disc that controls the pad movement. If you have a repair center nearby pick one up or maybe find it online. My part is #26 in this photo. http://www.ereplacementparts.com/dewalt-dw422-type-evs-random-orbit-palm-sander-parts-c-100927422757.html

-- Jeff

View Tokolosi's profile

Tokolosi

673 posts in 1110 days


#3 posted 03-16-2012 07:29 PM

@ Christef: I have tried that with a 320 grit disk that is smoother than a piece of copy paper. Same results.

@ JNP: I will definitely look into that right now. Of course according to a quick online check that part on mine has been discontinued. But they still sell these things at Home Depot. So that doesnt make sense. I’m getting on the phone right now.

Thanks for the input gentleman. I really appreciate it.

-- “There is nothing like looking, if you want to find something. You certainly usually find something, if you look, but it is not always quite the something you were after.” ~ JRR Tolkien

View Tokolosi's profile

Tokolosi

673 posts in 1110 days


#4 posted 03-16-2012 07:37 PM

Update. Just got of the phone with a repair center. The part is no longer made. However, he said that the De Walt part may fit as the machines are clones. Go figure. Well Im off to grab one and see if it works.

-- “There is nothing like looking, if you want to find something. You certainly usually find something, if you look, but it is not always quite the something you were after.” ~ JRR Tolkien

View Sorethumbs's profile

Sorethumbs

38 posts in 1402 days


#5 posted 03-19-2012 07:55 PM

count me as one with the same problem, the Dewalt.

View Tokolosi's profile

Tokolosi

673 posts in 1110 days


#6 posted 03-20-2012 07:59 PM

Update: While the DeWalt part was virtually identical to the one on my sander it was too small. I have the $2 part on order and hopefully will get it in a week. I hope it works. Had to loan a sander in the interim and I hate loaning tools. Something always go wrong and while I love buying new tools I hate doing so to replace on a loaner that gave the ghost on my watch.

-- “There is nothing like looking, if you want to find something. You certainly usually find something, if you look, but it is not always quite the something you were after.” ~ JRR Tolkien

View Tokolosi's profile

Tokolosi

673 posts in 1110 days


#7 posted 04-07-2012 02:40 AM

Finally got the little plastic ring for my sander. Installed it and had high hopes. But alas it still spins like a disk grinder. It did not fix my problem. But all is not lost. I have since found use for a small hand held ‘belt sander’!

-- “There is nothing like looking, if you want to find something. You certainly usually find something, if you look, but it is not always quite the something you were after.” ~ JRR Tolkien

View Grandpa's profile

Grandpa

3213 posts in 1430 days


#8 posted 04-07-2012 03:01 AM

I had a sander do something like that once. It was a PC 505 pad sander. it would dart around and I was simply not big enough or strong enough to stop it from having a mind of its own. I finally resorted to the owners manual and it described my problem. the felt pad on that sander was not flat and it need to be cleaned up. I put a piece of sandpaper on a flat table (full sheet) and set the felt on the paper and started the sander. with the sander running I would pull it toward my body and it remove a bit of the felt pad. After a couple of times across the sanding sheet I put new paper on it and it worked like new. Maybe something like that??

View wee3's profile

wee3

76 posts in 1027 days


#9 posted 04-07-2012 06:33 AM

Yea,plastic ring brake,sounds like.good luck.

-- BiLL @wee3

View ChrisFranklin's profile

ChrisFranklin

23 posts in 944 days


#10 posted 05-28-2012 01:35 PM

Bit of an old thread, but in hopes of helping somebody down the line: these sanders have 3 ball bearings. Two are for the two ends of the motor shaft like any other motor. The third is between the flywheel/fan and the sanding pad, and is slightly off-center, hence the random orbit. If this bearing seizes the RO sander becomes a high-speed direct-drive grinder. Sounds like this might be the problem in the OP. It’s part #23 in the drawing linked above, 4-5 bucks to replace.

-- Mud thrown is ground lost.

View Tokolosi's profile

Tokolosi

673 posts in 1110 days


#11 posted 05-29-2012 02:55 PM

Chris,

Thanks for the advice. I’m definitely going to give replacing that bearing a go.

-- “There is nothing like looking, if you want to find something. You certainly usually find something, if you look, but it is not always quite the something you were after.” ~ JRR Tolkien

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com

Latest Projects | Latest Blog Entries | Latest Forum Topics

GardenTenders.com :: gardening showcase