DIY Miniature Belt Sander Machine (2 in 1 Sander)
Neat. Good work. I like the self-tensioning spring for the belt. You're going to need to put a bearing on the other side of that blue shaft coupling though. Those little anodized blue shaft couplers are just barely good enough to transfer torque from the motor. They can't handle ANY radial or axial load at all. You're going to get about 3 minutes of light sanding on that disc before that coupling walks right off of there. You can see it bending all over the place in the video.
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