Quote Originally Posted by WmRMeyers View Post
Sure, if you need big holes. How about smaller holes? ...
Lots of very small boring heads out there. Commercial as well as DIY built...

This boring head has a diameter range of 0.016" to 0.276".

https://www.mmsonline.com/articles/w...st-boring-head

Construction details included for this one...

https://homews.co.uk/page199.html

Of course, buying drills is far more practical than making them or building tiny boring bars. My quoted remark was sarcastic.