[Silverbullet555]

Just curious as I am tramming my new mill for the first time, what is acceptable accuracy in tramming. I am using the method Haas has posted on youtube using a .0005 indicator. I am somewhat of a perfectionist so I try to get it perfect, but there is a limit to how close one can get it because every time a bolt is loosened or tightened, there is some variance.

What should I be happy with?

[hoss2006]

If you got it within .0005, you're good to go.
people have to learn that there are tolerances in machining,
fighting to get zero all the time is going to be very frustrating.
Hoss

[Silverbullet555]

If you got it within .0005, you're good to go.
people have to learn that there are tolerances in machining,
fighting to get zero all the time is going to be very frustrating.
Hoss

Which is why I asked. Chasing a magical unicorn of perfection sucks.

[photomankc]

It's a bit relative to your sweep distance too. If you are sweeping a 3" circle (like maybe a vice bed) I might be a little more fussy but if you are sweeping a 6" arc then you are doing real well at 0.0005". Also got to remember that these little mills are going to flex. I can tell the tram difference in a heavy cut (0.050") with a 2.5" face mill vs a cleanup pass at 0.002", the heavy cut flexes the head enough to get it to lean a bit downward at the side pushing through the metal and only shows cutting at the leading edge, the cleanup pass shows just a hint of tool marks at the backside of the cut. Longer tools do it more than shorter ones.

Sounds like you have it nailed down pretty well. I'd call it good and go on.

[ALO]

Where were those tramming videos located?

[Marc N Fournier]

[ame=http://www.youtube.com/watch?v=40Q61UAnOTA]G0704 Tramming Part 1.wmv - YouTube[/ame]

Found wih a quick Google "tramming mill Hoss"

Marc

[ALO]

Thanks I found the rest too. Is there a video or drawing for the tramming aids?

[hoss2006]

Here ya go.
Projects2
Hoss