chamfers on parts being pressed into a blind bore

Exactly, it is the difference between broaching and pressing.

Yes its true but you have to size the chamfer to suit the radius to avoid interference with the rad. If the piece needs to bottom in the bore, the radius can be under cut if the wall has sufficient thickness and thus interference avoided. In some cases the chamfer has a longer lead leg dimension to help a press fit get started.

Why would get involved in such a discussion...... i do not know.

Parts can be chamfered to remove a sharp edge.

Parts can be chamfered to be assembled so they go together without scoring / scratching a bore or other mating parts.

Parts can be chamfered so they can be assembled as a blind hole may have a radus in the corner

Parts can be chamfer for aesthetics.

So unless you are on the design team that has indepth knowledge on why parts take the form and or fumction maybe we all just guessing.

Anthony @ ALNO

http://www.alnoproductservices.com.au

Unless there is a reason not to a good machinist will all ways put a small chamfer on the ends and or groves of his work pieces for obvious reasons.

From: Tim Hawley Master Mech.

Is the cylindrical part being pressed into the blind bore? This is very important in order to answer your question.

Waiting for your response,

Best Regards, Tim

You may wish to reference either or both ANSI Y 14.5 and the Machinist Handbook for this and many other machining questions.