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If you would really like to guide the vendor to a particular manufacturing process, you can do so with surface finish specifications. Hope this helps.

Cylindricity could work, but on your latest comment on the ideal size and tolerance. It sounds to me like you may have to look for a new tubing supplier? Perhaps a higher grade precision seamless and possibly a different material as well. Hope this helps.

MacomMech, First off in this case when dealing with a diameter, Total Runout controls simultaneously form (cylindricity), orientation and location of all surface elements of the diameter relative to the datum axis. It does not control size! You say in a subsequent post that "I'm having...

If I understand your post correctly, you are talking about the tolerance zone being square rather than diametral, where typically the cylindrical tolerance zone is converted to a greater value to be circumscribed about the allowable square coordinate tolerance zone. However, you are proposing...

Regarding the CR method. Look at the the last sentence in para 2.15.2. If this "out" doesn't confirm the ambiguity of this particular control, I don't know what does. Hence, my advice to Jszymkowski is to spell out and depict what you need if it is that critical to the function. Again...

Ringman, The controlled radius in my understanding, vaguely defines a refined surface finish on the radius feature itself. It does not in my opinion address the transitions at the two tangent surfaces. Now one could interpret it different then me and there in lies the problem it is not in its...

The scenario you describe unfortunately is one of those shortcomings in the current standard regarding transitions. The draft of the future Y14.5 standard has I believe attempted to address this with the nonuniform surface of profile callout. See fig 8-9 and 8-11. It uses basics R dims and...

Without seeing what your applying to I can only imagine and my suggestion is purely speculation. You still need to stop translation along the shafts axis. Typically the flats would be used as a tertiary to clock the component. Perhaps use the shaft end that the flats are on or the shoulder...

ME2QE I'm curious, what is the finished size with tolerance? Is it specified on the assembly drawing? What is the process used to finish the size? Also, is this requirement on a BOM?

Good for you, seriously. If thats the case then I would search for sources who provide tolerance analysis as a primary service and ensuring the spec dimension schemes match the results including ASME standard compliance as a sub-deliverable.

Kenat, You're welcome, my sarcasm regarding my fellow engineers for whatever reason is reality in a lot of situations. Some, if not most, seem to think that once they hand off the requirements there responsibility is done. Its probably because they don't really understand variation analysis...

If I understand the OP correctly, there is no upper and lower just two single segment feature control frames that are to be verified independently. They are both legit, but the usage of projection on both is suspect. It would be my opinion and suggestion to remove the projection modifier from...

I also believe that this task is best left to those who know the functional intent. A drawing can be completely compliant to the standards and still not give you what you need, if you don't have the appropriate dimension scheme specified. This is what you can expect by outsourcing. To bring...

For those who don't have access to this standard. My copy is ANSI and dated 1979, the latest is ASME 1992. I can't imagine that the definition has changed but welcome any corrections if so. ANSI Y14.2M-1979 3.5.1 Center lines. These are used to represent axes of symmetrical parts and...

Of course common sense must prevail. The range of drawings from simple to complex does exist although the majority fall somewhere in between. I have had on occasion found that some drawings got to "busy" thus I added a note that simply states SOME HIDDEN LINES AND CENTER LINES HAVE BEEN...

This is not necessarily a dimension rule but an Engineering Drawing Requirement. My interpretation is fueled by ASME Y14.24, 3 DETAIL DRAWING. 3.1.3 Requirements - A monodetail drawing delineates all features of the part... DELINEATE - de•lin•eate 1 a: to indicate or represent by drawn or...

What he said, but remember if you use targets as your primary you should always include secondary and tertiary as well to lock in 6 DOF and for R&R.

In regards to the pluralism, it is my interpretation that per 4.2 and more specifically 4.2.2 that the DRF is not considered fully defined until sufficient datum features have been selected and referenced to lock it in six DOF or in essence immobilize the part to the three mutually perpendicular...

Powerhound, Please accept my apology, you are right, life is to short to let this forum get to me. Regarding the Implied 90°, we agree to disagree. I respectfully caution you or anybody out there to not rely on any software to be default Y14 compliant, regardless of claims. I come from old...

Hmmm, your really going to have to excuse me for what I am about to write it could be misconstrued as me being a little PO'd, wait a minute I think I am. I participate in this forum to be helpful to those looking for real solutions to real problems. What's with this hypothetical OP? Is...