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Re: changing the rubber pad on the Bosch PEX 12 AE
I'm not familiar with that particular model, but they are virtually all replaced the same way. There are a few screws through the pad into the base. Simply remove them and screw the new pad on. You'll see that it's quite simple once you get the new pad in your hands.
Just be careful not to strip the head of the screw: use the right size screwdriver tip.
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If you go on a Bosch factory web site you should be able to enter your model and down load a parts list. From that you will see that the motor drive an eccentric dog that causes the plate to jitterbug. If you kept the original paperwork you will have had this with it. All Bosch units come with warranty and parts list. Look up your nearest Bosch tools agent, see if he'll strip it if you can't and determine what's needed. You may find its easier and more cost effective to shop around online for a special offer and buy a new one. Not very green I know but may be more practical.
If you are replacing the fan assembly because the internal thread that holds the rubber/velcro pad has stripped, there might be an alternative.
I had the same problem with my PEX 12AE, which I believe is a similar sander. I found that the hole is threaded a good bit deeper than the screw, so I got a longer screw and so far it's holding ok. If/when that fails, I might try repairing the thread with an insert.
I switched it to a new pad and the sandpaper is still flying off :( I just don't get it the paper is not even half used up. my sander is the hook and loop velcro one ugh its driving me nuts I have to keep buying more sandpaper when the sandpaper is not even worn out! BTW Mines a dewalt hook and loop random orbit sander
Piece of cake. Just push the red slider as far as it will go in the direction of the arrow. Look for the seam where the pad attaches to the sander plate, that is where it separates. Give the rubber a little tug, and it should come off quite easily. Pop the new pad on, lock it in place by pushing the slider button as far as it will go (in the opposite direction to the arrow) and job's a good 'un!
This is generaly due to previous adhesive buildup on the backing pad OR, the face of the backing pad is breaking down and cracking.There are two ways to handle this. You can try scrubing the crud off the pad (I wouldn't) or, you can get a new backing pad for your sander. At this point, you might want to go with a velcro type pad or hook and loop as they call it (cleaner and no goop). Check your local home depot for pads. If you cannot find one, I would suggest you call Klingspor abrasives Co. They have area reps all over the United States. I know, as I used to be one of them.They carry,.. and will send you pads via UPS. Just make sure you don't try to put a 6in pad on a 5in sander or vice-versa as the pads are weight-mated to the sanders. If you do, you will burn up the motor in your sander rather quickly.
It sounds like you need to replace the backing pad on the sander. Over time the velcro (hook & Loop) on the backing pad will loose its stick. A Bosch service cneter can supply you with a new one, just let them know which model you have. If its an adhesive back sanding pad the same thing applys just get a new one. Hope this helps
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