We have recently started offering a new auto-reversing tapping head, made exclusively for us by Procunier in Lakeland, Florida.  You'll find Procunier tapping heads used in machine shops around the world - they're a bit pricier than some of the other tapping head options we sell, but also really excel when using very small taps or when there is a need to tap a lot of holes at once (high duty cycles). 

Here's a Fab Lab Skill Builder video tutorial on how to use a dial test indicator to locate the center of a square or rectangular workpiece.

  Swing Indicating may be "old hat" to more than a few readers of this blog, but we find in our CNC Fundamentals Workshops that many new and self-taught machinists have never used the technique before.  Here's a brief Fab Lab tutorial on how to indicate the center of a hole.

  Here's part 2 of our Boring Head Basics video, OD turning