How do 3-Headed Drills Work?

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Hi, I don't have any experience in physics or engineering, but I'm interested in learning how these 3-bit drill heads work and thought maybe someone here could help.

Specifically interested in the gearing mechanism and how 1 drill can spin 3 heads in a row by itself?

What kind of gears are required and how are they connected inside for this to work?

Thanks :smile:


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  • #2
phinds
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Just drive the central shaft and have it with a gear that is directly meshed with gears on the two side shafts. This WILL have the effect of having the side shafts rotate in the opposite direction as the main shaft but if you look closely you can see that the cutting heads are indeed set up exactly that way.
 
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Thanks. Is it possible to have them all rotate in the same direction off the drive of the central shaft?
 
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phinds
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Thanks. Is it possible to have them all rotate in the same direction off the drive of the central shaft?
Sure, but it would be unnecessarily complicated, which is why it's done the way it's done
 
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