Spotface

this you may find in the Machinery Handbook, or in American Machinist's Handbook.

Don't know if it's "official" enough, but a definition is on this page:

http://www.allmetalcorp.com/htm/pg8_8_00.htm

HTH,
Mike

That is a satisfactory definition.

Here it is demonstrated in animation!

<http://www.jjjtrain.com/vms/cutting_tools_csinkborespot.html>

If between the definition and demonstration, the OP's friend isn't satisfied then he will have to die unsatisfied.

Stirling Stan writes: "If between the definition and demonstration, the OP's friend isn't satisfied then he will have to die unsatisfied."

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At the hands of a Tool & Die maker, perhaps?

-e

Thank you gentlemen, if this doesn't satisfy him, then nothing will.

http://www.tec-ease.com/gdt-terms.htm

Definition on this site.

"http://www.tec-ease.com/gdt-terms.htm

Definition on this site."

The Glossary and Resources of Symbols lists: "counterbore/spotface" and shows a counterbore!

They are made the same way but are distinctly different in depth and purpose!

Try this link http://en.wiktionary.org/wiki/spotface

Hi guys, I don't mean to hijack this thread but it seemed like the poster's question was answered and because my question was along the same lines I thought it would be good to post it here:

Okay, so I am building a size 5/16" Dia. Hole in NX 5. I have to spot-face it but I can't find anything on spotfacing in the reference book im using. I have also looked online but the only thing I could find was that generally a depth of 1/16" was used. However, this doesn't tell me a dia. If some knows what I am looking for that would be great. Thanks.

May be this will help

http://fulflo.com/pdf/pg10.pdf

The basic rule is : The diameter of the spot face must be a bit larger that the circle of the Hex of the bolt (ie across corners) or washer diameter - whichever is larger.

The purpose of the S/F is to provide the flat surface perpendicular to the bolt axis so that the uniform loading on the bolt face is ensured.

The siliutly larger concept is to ensure that despite slight mismatch of the two holes, the bolt head do not go out of the spotface.

We have our company standards. And I am sure that international stds will be available. Check the ones where the cleanrance holes for bolts are given. They are sure to have it.

We are usually in Metric, so for " it is a bit difficult for me.

.