MR1 Touch Probe 1/2" Shank Upgrade

MR-1
1

Anyone made a new touch probe cover with a 1/2" shank, and perhaps a bit longer as well for extra reach when needed? I swear the probe is the only thing i use a 3/8 collet for, and since nearly ever process starts and ends with a probe followed by either a 1/2 endmill, 1/2 shank fly cutter, or 1/2 shank ER11 extension, its a lot of unnecessary collet swaps.

Seems like a item best made on a lathe, which I do not have access to.

Alternately, any 3rd party probes that are compatible, plug and play type? If i need to re-pin a connector that’s completely fine, just not quite ready for a Linux CNC conversion…

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Going to try one of these inserts (just for the probe) and see if TIR is within tolerance. At least until a better solution presents itself…

https://a.co/d/6wgoAhm

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I thought I got an extra 3/8 collet with my Mr-1 so I had bought nuts balanced to a higher rpm . Helped quite my machine and now the collet and new nut ride with my probe .

4

Who did you buy extra nuts from? If they didn’t come from Langmuir then they are probably for a regular ER20 spindle, Langmuir has a totally unique ER20 spindle standard. See if the nut feels sloppy when installed with no collet, if so it’s the wrong fit and could damage your spindle threads over time.

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5

That’s basically what I made on the lathe, though mine didn’t have the expansion slot. It worked well for me. If you re-center the probe after installing it then any runout in the shim doesn’t matter, the outside of the shim is your new reference point.

I installed it with gap filling loctite (green) for a semi-permanent install. I could remove it with heat if necessary.

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If you happen to find a plug and play probe pls post it. These things are garbage

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I bought extra nuts from Langmuir for each of my collets… so much better. I also have an extra 3/8" nut and collet so I keep one nut/collet pair sitting on the probe at all times.

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I also have a pile of the extra collet nuts.

the goal here is to eliminate the useless change of collet and nut EVERY time I use the touch probe.

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Use caution with aftermarket collet nuts. The Langmuir spindle is not M25-1.5 but M24-1.5.
Unless it has been updated, the aftermarket collets will not fit correctly. Just saying.

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For anyone interested, my accepted solution is this:

https://a.co/d/7lpwNqf

Has a small flare at the base so it cant go all the way in, no measurable runout.

It does prefer to stay in the collet vs come out with the probe, so I am probably gonna toss a light coat of 222 on it to hold it in place.

Has been so nice to be able to swap between ER11 extension, probe, roughing mill, and fly cutter without having to swap the collet.

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11

yes, i also have nuts for each er-20 (and my er-11) collets - that way I can have them all cleaned and ready as tools need swapped. I 3d printed a tray that holds them all in a row, so each setup is ready in tool change order…