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Drilling Holes in Minis - Part II: The Screwdriver

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Xintao writes:

Great article.

Revision Log
17 January 2016page first published

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Personal logo Editor in Chief Bill The Editor of TMP Fezian writes:

Continuing from last week, my problem is that I want to drill some 1/16" holes in some tank hulls, so that the tank turrets will fit properly.

Tank turret and hull

Now this is a nifty new battery-powered screwdriver that has been getting some attention. What is unusual is that it combines low speed (100+ RPM) and high torque. It will run for eight hours or so on two AAA batteries. Do a search for "general tools 500 cordless ultra tech power precision screwdriver" and you'll find it available in lots of places, ranging from $40 USD to $10 USD.

Cordless Precision Screwdriver

So what good is a screwdriver for drilling holes? That's where MicroMark comes in. They make a Drill Chuck for Ultra Tech Precision Power Screwdriver. It comes in two sizes, so if you buy one, measure the shaft on your screwdriver to make sure it will fit.


What you do is remove the bit from the screwdriver, slip the chuck over the screwdriver, and use the provided wrench to tighten a set screw so it will stay in place.

Cordless Precision Screwdriver with Chuck

Now, you've got a handy battery-powered drill!


This drill only has one speed: slow. It takes a minute or two to drill the hole I need… but I don't need safety goggles, either! (And my fingers don't get tired…)


This tool works great for this task. The chuck handles bits from 1/64" to 1/8". It might seem a little crazy to spend $19.95 USD for a chuck, but it does the job.

Next Time: Going Larger!