Straightness Gage

[Qual_Eng_17]

Hello Everyone,

Does anyone have any experience with designing/measuring straightness on a shaft. I am looking at a tolerance of .1mm over 100mm distance, a "feeler" gage does not work for my application, a bore measuring gage does not work either due to a material condition not existing on the diameter causing the diameter to move which ultimately can give some Go/NoGo gages more or less room.

I cant find much online that would offer something reliable or we could Validate. Any Thoughts?

 

[japayson]

I asked the question at PERPLEXITY.AI.
It was able to report measurement methods. I suggest you check it or another AI search, it could help. You could always then review the methods with people here. P.S. I tried to post the answer, but it contained too many links.

 

[Miner]

I recommend that you purchase Geometric Dimensioning and Tolerancing: Applications and Inspection (2nd Edition) by Gary K. Griffith. Chapter 5 covers the measurement of straightness in detail. In brief, you need to use a surface plate and a height gage with an attached indicator. The ends of the shaft must be leveled then the indicator used to find the Full Indicator Movement of all of the Top Dead Center measurements as you traverse the length of the shaft.