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  1. #1
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    Default Bosch Random Orbital Sander

    I have a Bosch PEX 400AE random orbital sander, which is about a year old.

    Early in the piece it threw off the sanding disc and at the time I did not see it come off. Hard to believe I know, but this is what happened. It took me a minute or so to realise that precious little sanding was taking place and by that time I had flattened off the base. Now the paper definitely didn't grip.

    So I odered and received a second base ( at my expense as I considered the fault lay with me). This too is reluctant to grip the sanding discs. I am using Bosch sanding discs so in the end I decided that my sanding technique must be lacking.

    I still needed a replacement sander (I had a faithful little makita which also chose a similar time to die, but at least that was about 15 years old and on its third base plate). I know there does seem to be a pattern here, but hook and loop doesn't last for ever.

    I started looking again at orbital sanders including the blue range of Bosch. As I was investigating I chanced upon a review of the Bosch 150 Turbo. In that it made reference to the shortcomings of the PEX 400 AE and it's inability to hang on to the sanding discs.

    So, two questions if you don't mind.

    Has anybody else experienced similar problems with the PEX 400 AE?

    Are there any coments on the 150 Turbo?

    Regards
    Paul
    Bushmiller;

    "Power tends to corrupt. Absolute power corrupts, absolutely!"

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  3. #2
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    crowie is offline Life's Good, Enjoy each new day & try to encourage
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    Default

    G'Day Paul,
    I have a very cheap 5" random orbital sander that won't hold the 40grit sanding disc while the 80grit seem to be okay.
    I also have a 10 plus years old 6" Bosch Blue Random Orbital sander and can't fault it; I just air blow it & the filter out at the end of each use.
    I can't vouch for the newer models.
    Cheers, Crowie

  4. #3
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    Default

    I was involved in metal polishing for a number of years and we found that while hook and loop was the bees knees for being able to work through grits to finish cleaning up welds, it does not like any heat buildup at all. We were working from 120 to 600 on 5 inch angle grinders running at about half speed probably running 3-4 hours a day, (balance of time flapwheel or surfacing machines), and were lucky to keep a hook adaptor usable for a week or so. We started replacing the hook adaptor (abt $30), then buying Norton individual hook pads to replace the worn ones (abt $17). Ultimately we bought a self adbesive hook pad in metre wide sheets of the roll about 2 or 3 metres at a time and cut our own pads with sissors. Cost per pad was down to $1.50 each for material, about a minute to cut them and a couple of minutes to clear an old pad and replace it.

    Would take a bit longer to punch extraction holes for perfed disks, but definitely worth considering.

  5. #4
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    Thanks Crowie and Malb

    I'll take all of that on board, prticularly the self adhesive sheet. Malb, where did you source the material?

    I do see a problem with the 400. It is Bosch's hobby range and I probably give it a bit more stick than I should.

    The second issue is that this separation of the pads hasn't really been a problem in the past.

    Anyhow still interested to hear reports on the Turbo 150 before I lash out close to 400 readies.

    Regards
    Paul
    Bushmiller;

    "Power tends to corrupt. Absolute power corrupts, absolutely!"

  6. #5
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    Thumbs down

    My Bosch PEX is virtually useless. Threw the disc holding pad assembly off just out of warranty - and it had had very little use. The screw that hols it all in place just worked loose. even Loctite fails to hold it in place.

    To me a circlip would be a better idea.

  7. #6
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    Default

    Quote Originally Posted by Bushmiller View Post
    I
    Has anybody else experienced similar problems with the PEX 400 AE?
    I'm not sure of the model, but I've had a Bosch Pex random orbital for 10 or so years and had the frisbeeing disc problem as well.
    I just bought a sheet of (good quality) hook material and glued it straight over the old flattened stuff. I've done this a few times since.. but I get a couple of years run out of each.

    what if the hokey pokey is really what it's all about?

  8. #7
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    I like Malb's post re the self stick sheet - it appears that it could be an answer for me even though mine is not a Bosch but a Makita

    Eg https://www.woodworkforums.com/f13/ma...roblem-126960/

  9. #8
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    Well, I picked up a Bosch Pex 12 ae for $10 at a garage sale. It also sheds discs like it's going out of fashion. The pad itself looks of, so I had to order some discs from The Sandpaperman and whilst cruising the site found the Converter discs. So I'll give them ago.
    Pat
    Work is a necessary evil to be avoided. Mark Twain

  10. #9
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    Re sourcing velcro hook sheets, I don't know where we got the sheets I mentioned above from as they were originally located by someone else and after testing one lot he was responsible for further purchases. A bit of googling bought up the sandpaper man who has a variety of sizes available. This one has a picture or the stuff rolled showing the backing and the hook face. The logo in the back protective film is the same as what we were buying, so it is probably the same stuff in aadifferent sheet size.

  11. #10
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    Good one Pat & Malb - thanks for the info.

  12. #11
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    Well the converter disc is installed and once someone remembers the threadlock the pad to the machine, no sanding disc flying thru the shed
    Pat
    Work is a necessary evil to be avoided. Mark Twain

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