How to Make a Super Sensitive Micro Drill Press Plans and instructions to make a simple and sensitive micro drill press, and the small drills needed to drill watch and clock size holes in the .004" to .032" range. An ordinary drill press does not turn fast enough for the small drill to be as effective as it could be: and , is not sensitive enough for the operator to "feel" the cutting action of the drill - the result is a lot of broken drills. This easy-to-make little drill press is very sensitive to help reduce drill breakage, and turns in an approximate range of 12,000 to 30,000 RPM with the recommended power supply. A couple of pieces of aluminum um bar stock from hardware store, some 4-40 screws, a small inexpensive high-speed dc motor, an ac/dc power supply, some shim stock, and an on-off switch comprise most of the components needed to make this little gem. Component sources are listed. You are also shown an easy and accurate way to make micro-drills. X and Y axis slide allow you to accurately position the work for drilling.
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