A set of inserts for the Bosch PBD40 drill press table. Using each drill bit with a matching insert (e.g. 10mm drill bit with 10mm hole insert) will help to get clean edges where the drill bit comes out of the material (wood). Use a sharp drill bit, optimal rpm, the insert, and sink the bit slowly through the material!

If you do not want to print all sizes (2 to 17mm) load the project and delete the parts you do not want. 

I've added the OpenSCAD source file, if you need different sizes. Use the module pbd40_insert(d) with d as the diameter of the borehole.