Build Your Own TurtleBot: 2″ Standoff

• Start with 7/16" rod aluminum stock (1/2" also works) and measure a 2" length.
• Next, cut the part to length using a hacksaw.

A file can be used to clean up the rough end and a bit of emery paper can be used to remove the burrs on the edge.

• The center head of a combination square set can be used to mark the center of the rod.
• A center punch can be used to help start the drill bit.

A center drill is a short drill bit that can be used to start the hole. Drill in about 3-5mm or about halfway down the the conical portion.

• Use a #36 (0.1065") drill bit to make a hole about 0.7" deep.
• Once the hole is finished, turn it upside down and knock it against the table to remove chips.
• Using a #6-32 tap and cutting fluid, tap the hole 0.5" deep. Keep the tap straight and turn the tap one full turn forwards and a quarter turn backwards and repeat until finished. Do not force the tap and don't break the tap or you will spoil the work and have to start over.
• Repeat the same procedure for the other end.

• Once both ends are tapped a 1" threaded stud will be used to create the male threads.
• Apply a "red" permanent-strength thread locker to a 0.5" length of the stud and screw it into one end of the spacer.

• Wipe off the excess thread locker with a paper towel and you have now finished one spacer.
• The TurtleBot will require eight 2" standoffs, so you may want to make them all at once.