[hodaken]

Hey guys,



I have kind of a unique problem I hope someone can help with... I'm side milling a small 304 ss part and the process breaks through into an id feature at one point. The problem is that when it breaks through it is laying a very thin burr (like a piece of shim stock) down into the id area. That is what i'm trying to remedy. Is there a special type of end mill/process I should me using that would prevent this?

[Jim Dawson]

About the only thing you can do is change the order of operation. If possible do the internal feature after the side milling operation.

The other option might be to do the side milling operation in two passes. One roughing pass, then a very light finish pass. It requires a very sharp tool for this to work. 304 is especially difficult to break the chips so tends to hold burrs.

[hodaken]

To be a little more more specific...This part is 6mm long by 8mm at the largest diameter. I'm running it on a swiss lathe holding it on the large diameter and have the endmill in a live drill position facing the spindle like so. for more reference, the endmill is 3/16