Accurately and coaxially drill a motor shaft for a grinder or sharpener without a lathe
How to properly and accurately drill an electric motor shaft without a lathe at home? When assembling a grinder without a lathe
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• Как сделать ГРИНДЕР без токарки Размеры Че... I had to drill a motor shaft, and I did it by clamping the shaft in a vice and trying to keep the drill as vertical as possible. Even with good drilling skills, it's quite difficult to get the hole perfectly aligned. The result is inevitable wobble, which must be compensated for using various methods.
After the video was uploaded to YouTube, some viewers (to whom I am very grateful) advised drilling the shaft directly with the engine running.
First, I tried to understand how this technique works and the theory.
So, let's put the tool to the material. I'll point out right away that a ratchet screwdriver is best for this, as it will prevent the drill bit from breaking if it jams.
Use a drill bit 2 mm smaller than the diameter of the hole you need. I'll need an M6 thread, which requires a 5 mm hole, so I'll use a 3 mm drill bit.
Since some misalignment is inevitable, the drill bit's cutting edge will select a diameter slightly larger than the drill bit's nominal diameter.
The hole's geometry may also be non-cylindrical, with some curvature. However, due to the continuous rotation of the shaft, any misalignment should be so minimal that it can be safely ignored. The hole should be practically coaxial with the shaft's axis of rotation.
Now it's time to test the theory in practice. This Romanian washing machine motor will replace the weak motor from a Soviet "Chaika" washing machine in my grinder. This technique is also useful for those who want to make a grinder or other machine themselves.
How to drill a motor shaft at home
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