Pieter Vleeshouwers posted an answer for this Fein 6" Dust - Free Random Orbit Sander - Msf 636 - 1:
"Can be 1 collector on the armature that is damaged , or stator contact or just an broken..."
Pieter Vleeshouwers posted an answer for this Fein FMM250Q Select Multimaster Oscillating Tool Kit:
"Aha dirth inside mechanic or Oscillation has sharpened the blade holder axis due to the..."
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