- Joined
- Jul 20, 2014
- Messages
- 1,386
My Starrett hole gages are very accurate tools, the large and small sets, but I noticed that great care must be taken when using them.
I.e. When I mic the hole gage, I use the extremely light pressure otherwise the measurement is off. The gage itself is very snug in the hole, since they use springs or expanding collet systems, but to mic them, the carbide flats just touch the ends. I've had to refine my technique using accurate bore ring gages, and this has been my experience. I've only used Starrett hole gages but suspect the technique would be the same for all brands. Using the bore rings really opened my eyes.
Of course, bore micrometers in a range of sizes is best, but very $$$$$$. I'm happy if I get to within .002" What kind of results is everyone getting with their hole gages?
I.e. When I mic the hole gage, I use the extremely light pressure otherwise the measurement is off. The gage itself is very snug in the hole, since they use springs or expanding collet systems, but to mic them, the carbide flats just touch the ends. I've had to refine my technique using accurate bore ring gages, and this has been my experience. I've only used Starrett hole gages but suspect the technique would be the same for all brands. Using the bore rings really opened my eyes.
Of course, bore micrometers in a range of sizes is best, but very $$$$$$. I'm happy if I get to within .002" What kind of results is everyone getting with their hole gages?