Question about Bosch Power Tools Sanders Orbital Sanders

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Orbital sander flicking the sand paper off

I have a Bosch Pex400 AE orbital sander constantly flicking the sand paper off. 
I am sanding the paint off a barge board on the house using a course sand paper (60 grit). i need to do this as the paint is flakey
I have tried using all the speed settings to see if it is speed related, without success. 
Any suggestions, would be appreciated.
Thanks

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  • 3 more comments 
  • warped_79 May 04, 2009

    I have the same problem - the sander is brand new, and I've been using it for about 30 minutes. I get about 2 minutes sanding out of a brand new pad before it gets flicked off. The sandpaper side of the pad is still practically brand new. Once it's been flicked off it will not stick again and I have to start again with a new disc..



    I have tried cleaning both the sanding disc, and the velcro pad on the sander with a brush with no success... I'm about to return the sander back to Bunnings and try a different model

  • warped_79 May 04, 2009

    My brand new Bosch orbital sander flicks off a brand sanding disc after about 2 minutes of use. The disc will not stick back on (like the velcro just doesn't grab). I've tried cleaning the disc and the sanders velcro pad with no success.



    Once the sanding disc has come off the velcro it won't stick again and I have to grab a new one and try again.



    I'm about to return this thing back to Bunnings and try a different brand (I got the $100 bosch one thinking it would be better quality than the $40/$50 ozito's)

  • Anonymous Mar 21, 2014

    5inch De walt palm sander rpm slows to allmost stop speeds up with less pressher

  • Anonymous Mar 25, 2014

    need to know how to remove sanding pad and paper and replace with new

  • d milich
    d milich May 16, 2016

    After reading all the comments about Bosh Pex400
    I refused to go and buy a new pad...$28NZ...found some Hooks in my wife's draw and glued 6 strips across the pad....and ques what....it works like a dream.... just finished 2 hr of solid sending and not
    ones the paper come of.....whats more I had a prob puling the paper of to put the new paper on.....Bosh....wake up....you got it wrong with this machine...

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You did not specify how the sanding discs are meant to be attached to your sander's backing pad.  My experience with this type of problem is material from the sanding process builds up on the backing pad and does not allow the sanding discs to adhere properly.  If you have a velcro type system, clean the hooks on the sander's backing bad by soaking the pad's face in a plate of paint thinner for 20 to 30 minutes then use a wire brush to remove the rest of the paint physically.    For adhesive pads clean the sander's backing pad surface with denatured alcohol.  Do not use isopropryl or rubbing alcohol as this may not be 100% alcohol and could contain a lubricant like glycerin.  When the sander's backing pad is completely dry and clean it will hold adhesive backed pads fine.    Flaky paint is best scraped off before sanding, use a wide putty knife or a paint scaper to remove large flakes before sanding.  This will minimize airborne dust and cleanup.    For best results with adhesives, always keep your surfaces  clean!    Good luck and happy sanding!  Michael Mittelsdorf   

Posted on Jan 10, 2009

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