Mitutoyo 050101, Edge Finder, 3/8 Dia. Shank, .200 Dia. Tip

At $10, its hard to believe this is really a Mitutoyo branded tool, but it is. Quality is fantastic, very precise and repeatable, down to about a hundredth of a millimeter (as far as I can take it). I much prefer the cylinder style edge finders to the conical style edge/center finders. Its good to have one of the conical type in your toolbox for occasional use on small holes, but 99.9% of the time, this is the one Im reaching for.

Well manufactured,precise edge finder. Lacking documentation on usage like recommended RPM, maintenance(if any). It is obviously possible to take it apart since there is a crew on top of it.I like it but would have liked a small printed note with size,RPM etc.

Not cheap quality. Accurate within .002 sturdy get value

Found the edge. Want to share a tip that has helped me a lot with CNC milling. Example: find the left side, set x to 0. Find the right side. Lets say it was 11.2763. Move edge Finder above top of part. Enter this gcode - G1 X[11.2763/2] f5. It does the math for you, no need to pull out the calculator, it takes you to the center; set x to 0. You are welcome.

Its an edge finder. It works smoothly and repeats well. Its Mitutoyo, nuff said!

Value for money

Allowed me to drill a ¼ hole in 1 flat bar with .0005 accuracy.

This product doesnt seem to be an actual Mitutoyo edge finder, rather it is likely a generic copy. It seems to work but is not as accurate as I had hoped. Its fairly difficult to determine when to stop, and I had been under the misconception that there would be an audible indication as well. If there is an audible indication I cannot hear it over the sound of my milling machine motor (which isnt very loud, to be honest). I will admit that it could be operator error and that I may get better at using it with time.

I bought this edge finder for use in my home/hobby shop and am very happy with it. Ive used it in a collet in a Bridgeport-style knee mill and found it to run true with a very crisp break when touching an edge. Having a smaller 3/8 shank will allow me to use it in the CNC router table as well. One thing I would note, with its small diamerter, the end doesnt kick out quite as far as a 1/2 shank tool, so if vision is a problem, a 1/2 shank might be the way to go.

I havent used this a whole lot but it works great when needed.