Could someone please tell me how is the best way to check the TIR on a tube appx. 4" OD X 30" lg. There is a conflict between indicator -vs- cmm ( Romer arm) eng. -vs- QA.
Could someone please tell me how is the best way to check the TIR on a tube appx. 4" OD X 30" lg. There is a conflict between indicator -vs- cmm ( Romer arm) eng. -vs- QA.
Thank You JW
An indicator will tell you part of the story but not the whole story. An indicator in one spot will give you circular runout. Sounds like you want Total runout which is all of the surface. This will include all of the roundness, straightness, offset of the axis and also the taper which you will probably not pick up unless you mike both end and check for taper. Very hard to check on a long part. Good luck.
Could someone please tell me how is the best way to check the TIR on a tube appx. 4" OD X 30" lg. There is a conflict between indicator -vs- cmm ( Romer arm) eng. -vs- QA.
Thank You JW
An indicator will tell you part of the story but not the whole story. An indicator in one spot will give you circular runout. Sounds like you want Total runout which is all of the surface. This will include all of the roundness, straightness, offset of the axis and also the taper which you will probably not pick up unless you mike both end and check for taper. Very hard to check on a long part. Good luck.
