rons
Diamond
- Joined
- Mar 5, 2009
- Location
- California, USA
This is the insert I have with an Iscar holder.
11ER A60 K20C INSERT – chpeters.com
The tip can fit in a .010 square box. An upside V in a square box. Observed under pretty good mag (50x).
How does one get an accurate root length in the range of threads that these bits are advertised for.
For example, a 1.25mm pitch requires a root of Pitch/4 = .0123. The bit is about .005 wide at the tip.
Is the approx value of .005 (1/2 width of square box) ok to use?
Better to:
1. Plow in farther to get the required width. At the expense of extra removed metal. The bottom will not be flat but V shaped.
2. Before the thread is finally done, back out diagonally (29 degree method) and then back in with cross slide for another pass to cut the back side of the thread.
3. Before the thread is finally done, adjust compound to right (90 degree method) and then cut the back side of the thread.
4. ?
Signed by,
Mr. Refuse to stock every kind of insert available. And the tool was bought just to get snug up close to a shoulder.
(A DRO would be nice wouldn't it)
11ER A60 K20C INSERT – chpeters.com
The tip can fit in a .010 square box. An upside V in a square box. Observed under pretty good mag (50x).
How does one get an accurate root length in the range of threads that these bits are advertised for.
For example, a 1.25mm pitch requires a root of Pitch/4 = .0123. The bit is about .005 wide at the tip.
Is the approx value of .005 (1/2 width of square box) ok to use?
Better to:
1. Plow in farther to get the required width. At the expense of extra removed metal. The bottom will not be flat but V shaped.
2. Before the thread is finally done, back out diagonally (29 degree method) and then back in with cross slide for another pass to cut the back side of the thread.
3. Before the thread is finally done, adjust compound to right (90 degree method) and then cut the back side of the thread.
4. ?
Signed by,
Mr. Refuse to stock every kind of insert available. And the tool was bought just to get snug up close to a shoulder.
(A DRO would be nice wouldn't it)