Unimike or Anvil Mike With Plans

[jjr2001]

This version of a UniMike is easy to make with a small Mill. Very useful for measuring pipe and tubing wall thickness, step thickness, rivet head height and with custom anvils that can fit where you cannot get a measurement with a standard mike. It also works as a depth mike and for shoulder to edge distance.

As shown it has a 1" capacity but that can be extended with other "legs" of any integral inch length.
I have one shown that is for 1" to 2". You can extend them out as far as you need.

In addition you can use this mike to measure from a surface to a "step" or let's say you want to know how high a bolt head protrudes from a surface then you can remove the anvil rod and bottom foot and the bottom spacer. Refasten the bottom foot to the main leg and you now have a step mike.

The basis is the Starrett 263 micrometer head or barrel. I picked up a couple of these on the bay many years ago for custom precision stops and had one left over so I thought I would put it to use. I built mine from T6061 aluminum and with a few brass and steel parts. The spacer is brass and the anvil shown is drill rod. Not as fancy as a real Starrett Unimike but it does not cost $250.00 either.

The Starrett mike barrel was modified with a small flat that would be opposed to the locking set screw for the barrel. I was able to simply file it flat after coarse cutting with a Dremel cutoff disc.

The locking set screw may be replaced with a custom made 10-32 thumb screw if frequent adjustments
of the mike are required. Just a bit faster than using an Allen wrench.

I left my version flat but the milling of the recesses on the sides can be added if you want an area
for putting your initials or name on the mike.

Well that is about it. On to the drawings and pictures.