Perfect hole in stainless

[Batmanacw]

@Ischgl99 -That is interesting. I have never seen that chart. Yes, it appears that insert will work if angled as shown. Why does that not screw up the rake angle and change the finish?
In my case, this came up with a boring head. The insert holder has a flat so the angle could not be easily changed.

Every single indexible boring bar I own has this angle.

 

[rwm]

Every single indexible boring bar I own has this angle.

Cool. I assume you are measuring relative to the flat?

 

[Batmanacw]

Cool. I assume you are measuring relative to the flat?

If you reference the flat the tip of the insert is on center. The angle is built into the bar.

 

[rwm]

I am probably running my inserts above center.

 

[Batmanacw]

I am probably running my inserts above center.

Just a touch above center is great on a boring bar on a lathe.

 

[Alberto-sp]

Good topic book, about perfect holes, thank you.

Another question. Remember the pipe is OD 16mm? In a 60 mm OD pipe I have made 2 holes perpendicular to the axis to put trough this 16mm pipe and I'm going to braze it with silver rod.
Can this put deformation in the pipe? I have read that after brazing SS you must rinse the part on water immediately to get rid of the flux, but in that case I don't know if this is good or bad.

Any advise about this operation? Make first one welding and once cooled the second? Both at the same time?

Thank you

I forgot to say the big pipe, OD 60 has a wall thickness of 1,5 mm