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11th December 2022, 08:42 PM #1
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Can I use 150mm sanding discs on a 125mm sander?
This feels like a dumb question (cause obviously you can) but is there any reason not to beyond maybe the dust holes not lining up and the overhang?
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11th December 2022, 09:43 PM #2
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The disk will be unsupported at the edge, leaving the outer 12.5mm or so free to do as it pleases. If at any point the sander runs other than perfectly parallel with the surface, the disk till tend to cup upwards in the unsupported section. You then discover that the backer pad edges are tougher than it's faces, and that the lesser used outer edge of the pad is sharper than the supported central section, and become amazed at just fast these grooves appear in your almost finished surface.
Personally I wouldn't try it, I seen the effect it can have on stainless and mild steel, I wouldn't like to see what it did to wood.I used to be an engineer, I'm not an engineer any more, but on the really good days I can remember when I was.
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11th December 2022, 09:45 PM #3
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Course you can its only 12mm overhang just place the disc evenly on the sander. A bit of mis-alignment won't matter.
Experienced in removing the tree from the furniture
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11th December 2022, 09:53 PM #4
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You could buy a 150mm backing disc for your sander....
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12th December 2022, 10:29 AM #5
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You can always trim them to fit and punch holes to suit the sander.
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12th December 2022, 04:55 PM #6
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Cut them down?
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13th December 2022, 08:25 PM #7
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Mixed advice! Appreciate your answers. Hadn't thought of just getting a bigger backing disc. Otherwise might have to trim them down.
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13th December 2022, 08:35 PM #8
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I have a 150mm backing pad on my 125mm Bosch ROS
Originally Posted by lemerv
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14th December 2022, 09:11 PM #9
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Why do you want to put 150mm discs on? Do you have heaps to use up and only have a 125mm Sander?
Dallas
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15th December 2022, 02:09 PM #10
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Yeah I've ended up with quite a few 150mm discs somehow and don't want them to be wasted Originally Posted by Treecycle
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16th December 2022, 01:57 PM #11
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Choices
Basically three choices:
- Get a 150mm backing pad, or
- Cut existing disks down to 125mm, or
- Get a 150mm ROS, and it is Christmas and you really, really need one.
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17th December 2022, 06:59 AM #12
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Option 3 it is! Haha Originally Posted by GraemeCook
My ROS is a decent makita and it’s fairly new. I’ll grab a 150mm backing pad. Although $63 for the makita version! It must be gold plated!
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17th December 2022, 09:09 AM #13
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If this one fits your machine it's a bit better priced, just got to wait a little while for it to arrive.
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