Beck TD, Part 37 - A Temporary Speedometer

Back in Part 32, I told the tale of how I installed a "temporary" Auto Meter tachometer to replace Beck's non-working unit. Now Beck has a matching "temporary" speedometer!

A Square Hole

I needed this: a square hole in the end of a brass rod.

It's for a project on Beck TD which will be described in another post. The hole needed to be rather precisely 0.120 inches square, and the way you usually accomplish that is with a broach. That's a square tool that is pressed into a round hole to make it square.