Sanding Drum for DIY drill/dremel

thingiverse

<h3><b> CAUTION: Rotating part, Use all protective measures. Do not use ill fitting parts. This is experimental work, do it at your own risk. I take no responsibility for any mishaps. </b> </h3> I have made a hand held drill from 12 v dc motor which had 3.17mm shaft. Added micro drill chuck to that and it works nicely as micro drill. Good torque but low-medium RPM. The chuck supports 0.3-4 mm drill bits. Good and cheap drum for this size are not available in my area, so designed my own. It snugly allows M4 bolt. if it does not allow bolt to pass through the hole then do gentle sanding with file. I have used M4 40mm partially threaded socket head bolt and nut for the shaft. If you want longer shaft, use longer M4 bolt. Tight the nut at base to secure the bolt in place. I pasted piece of sand paper on the drum (with cynoacrylate as it works very fast and super strong bonding with PLA).