This started when we (me and some fellow modders / hackers) realized we wanted a simple high-quality PCB drill dress, but didn't want to pay $400+ for something that would only run at around 20,000 rpm. We also did not want to use the standard dremel drill-press for drilling PCB's as they tend to break bits fairly fast, and PCB drill bits can be expensive.
The solution that we arrived at was to use a Harbor-Freight Pneumatic 1/8" Micro Die Grinder, and attach it in-plane with a precision linear slide rail. The Micro Die Grinder runs at 56,000 RPM and has the 1/8" collet that I needed for the PCB drill-bits.
The keep the die-grinder in-plane with the rail, we decided to mount the linear rail to a self-centering drill-press jig.
The parts list:
1.5" Square Steel Tubing - Scrap from Around the Shop
56K RPM Micro Die-Grinder Drill - Harbor Freight - $10.00
Self Centering Drill Press Jig - Harbor Freight - $6.00
THK Linear Slide Rail - $10.00
- Ebay, Search for "THK Slide" or "Linear Slide"
MDF for deck - Scrap from Around the Shop
MISC. Screws - Scrap from Around the Shop
Springs - Home Depot / Lowes - $5.00