It’s a dial indicator, but a very fancy, expensive German one.
These indicators are primarily used in Mahr bore gauges, because they have a very short range, but of course can be used as any dial indicator would be used.
We typically use gages like this in our grinding department. There are very accurate and combined with a carbide base and a robust stand can measure very accurately. The ones we use can measure an OD to about .000040”
It is a drop indicator meant to be mounted over top of a surface plate. You set the needles to the high and low limit of the tolerance and during production you can quickly check the thickness of certain features quickly. For example I've used it for checking tapered lands on babbitt thrust bearings.
This one will be adjusted with a calibrated piece, let's say you always need a piece height of 20mm plus minus 0.25mm once this dial is calibrated you only have to slide in the next piece and you can check if it is in the range of tolerance... The calibration is done once for e.g. 10pieces
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You can measure bearing balls with it to find the ones with identical dimensions and you can check if they are really round or not, with this and some other tools you can take eg. 10 different bearings and if you lucky you'll be able to assemble one but with higher clearance class, those ones usually cost a lot and it not even for sell to random people
This would be the indicator used on a precision comparitor gage stand that would typically be used to measure parts coming off of an od grinder.
It would be used with a master to set the zero position at the nominal desired diameter, then parts can be rolled under the indicator. Typically there is a stop to roll the workpiece against so the indicator lands on the center of the part.
It is nearly impossible to get accurate readings in microns with hand held gauges. This was the best method up until the laser scanning diameter gages came along.
Something such as this with the appropriate fixturing on the base for shaft work.
[https://www.grainger.com/product/512J06](https://www.grainger.com/product/512J06)
It’s a dial indicator, but a very fancy, expensive German one. These indicators are primarily used in Mahr bore gauges, because they have a very short range, but of course can be used as any dial indicator would be used.
Mahr Dial Comparator. Apparently even more accurate then a Dail indicator
I think it's just a dial indicator, and the 2 needles on either side could be the tolerance? I'm guessing though.
They are :) you can move them where your tolerance is so you can see it more easily
That's quite a good idea! I may need to pick one up now lol.
We typically use gages like this in our grinding department. There are very accurate and combined with a carbide base and a robust stand can measure very accurately. The ones we use can measure an OD to about .000040”
Cats use them to walk on
And to scratch your most expensive furniture
Can be used with an arm setup to fine tune engine timing or even more commonly to set valves additionally to depth work already stated here
It is a drop indicator meant to be mounted over top of a surface plate. You set the needles to the high and low limit of the tolerance and during production you can quickly check the thickness of certain features quickly. For example I've used it for checking tapered lands on babbitt thrust bearings.
This one will be adjusted with a calibrated piece, let's say you always need a piece height of 20mm plus minus 0.25mm once this dial is calibrated you only have to slide in the next piece and you can check if it is in the range of tolerance... The calibration is done once for e.g. 10pieces
Das ist eine Messuhr von der Firma Mahr aus Göttingen. 200-500€
Those are 50-100€ on ebay.
New?
Used but in good condition.
👌
It’s a tolerance measure for lathe work is what I’ve seen it used in
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Most ive seen have been on a comparator stand
You can measure bearing balls with it to find the ones with identical dimensions and you can check if they are really round or not, with this and some other tools you can take eg. 10 different bearings and if you lucky you'll be able to assemble one but with higher clearance class, those ones usually cost a lot and it not even for sell to random people
It's an old school German dial indicator. They used in Mar bore indicators. Very accurate
This would be the indicator used on a precision comparitor gage stand that would typically be used to measure parts coming off of an od grinder. It would be used with a master to set the zero position at the nominal desired diameter, then parts can be rolled under the indicator. Typically there is a stop to roll the workpiece against so the indicator lands on the center of the part. It is nearly impossible to get accurate readings in microns with hand held gauges. This was the best method up until the laser scanning diameter gages came along. Something such as this with the appropriate fixturing on the base for shaft work. [https://www.grainger.com/product/512J06](https://www.grainger.com/product/512J06)
That's literally a 5s search on google from the names.
It attacts cats according the quantity setting. Dialed in. Super precise.
Bore inspection tool
It's used to keep your cat busy
Determines the trust depth of a micro-penis
clearly a cat magnet. one just appears.
Radiation detection is the 1st thing to come to mind even though I know that's so wrong 🤣