Step 1: Materials and Tools
1.Use your old corded drill or buy the cheapest one:
Example HF coupon for 12$ Drill: coupon
2. hose clamp
3. Scrap wood
4. Wood Screws
1.Table Saw (Can be done with a any saw, but have to changed little bit).
Step 2: Aseembly
Create a slide by sandwiching wood pieces together.
Use paper as a shims between the wood.
Wax the sliding surfaces.
Step 3: Assebbly
Secure the drill into the sliding carriage.
Take a square and make sure that the drill bit is 90deg to the surface. Use wedges if needed.
Add Handle and a spring to allow better pushing and returning.