- Joined
- Mar 21, 2013
- Messages
- 4,082
Got my face mill and inserts and thought I'd give 'em a try on some 7075 drops I bought. When doing bidirectional milling I notice a slight difference in finish and I have a very slight step where the passes overlap. I can't catch a fingernail on the edge, but I can feel the boundary with my finger. Maybe that's the difference in finish? All I know for sure is that if I just kiss the metal with a #2 Nicholson file the line disappears. ![Er... what? o_O o_O](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
But it is annoying to look at. Maybe if I make both passes in the same direction it will be less noticeable.
The pic is of the last pass at .010 DOC and about 2500 spindle rpm.
![DSCN4373.jpg DSCN4373.jpg](https://www.hobby-machinist.com/data/attachments/67/67822-c390b718dc679052af68a6cc60223735.jpg)
But it is annoying to look at. Maybe if I make both passes in the same direction it will be less noticeable.
The pic is of the last pass at .010 DOC and about 2500 spindle rpm.
![DSCN4373.jpg DSCN4373.jpg](https://www.hobby-machinist.com/data/attachments/67/67822-c390b718dc679052af68a6cc60223735.jpg)