A simple but reliable and high-quality construction will allow you to drill thin carbide drills.

To build the machine will need:

motor R775 https://goo.gl/cCgyQW collet 1/8'' https://goo.gl/ouqA3R collet holder https://goo.gl/u1dyb6 bearings 606 https://goo.gl/n9WciX linear bearings LM12LUU https://goo.gl/sQDcXD carbide drill https://goo.gl/iFmHWA

more:

• two polished shafts with a diameter of 12 mm and a length of 130 mm
• a piece of M6 stud with a length of 145 millimeters
• two springs
• small amount of mdf
• some fasteners

The driver for the spindle is assembled on the 555 timer. This allows the engine to run very soft

to be continued...