guythatbrews
Stainless
- Joined
- Dec 14, 2017
- Location
- MO, USA
I've seen this condition on PH Horn tools before. Mitsubishi as well so not junk stuff. I brought this to the attention of Mitsubishi talking heads at IMTS but for once they did not talk, and nothing ever came of it.
Here you can see the radius is not tangent to the tool flanks.
In this shot the R.008 is offset both ways .008. It looks better along the X axis than the Y. The Y axis end of the radius is actually slightly short of .008.
This is a 3mm minimum bore boring bar. The part radius is functional and I routinely must cut about .015 radii with +-.002 tolerance tangent to the face and bore. I can't seem to detect any defect at the tangent points with a cast of the part, and disregarding the slight shortness of the TNR in Y that is what I would expect. But the sharp at the point of tangency has to affect the surface finish along face and bore. The finish required is usually 32 max but sometimes 16 max. I've never been rejected for surface finish or size and this is a 30 year customer. Full disclosure neither I nor my customer can actually check the finish on the radius we can check the face and bore. The longstanding agreement is a close visual inspection of the radius. I really can't detect any problems with this flawed condition.
But the inserts do cost $30 each. Should I be expecting a better tangency condition on the insert? Should I complain? We used to have a very good PH Horn salesman that would come by but he retired. He would have been great to talk to. But I've seen nobody from PH Horn in probably 10 years so phone support is likely my only resource.
Here you can see the radius is not tangent to the tool flanks.
In this shot the R.008 is offset both ways .008. It looks better along the X axis than the Y. The Y axis end of the radius is actually slightly short of .008.
This is a 3mm minimum bore boring bar. The part radius is functional and I routinely must cut about .015 radii with +-.002 tolerance tangent to the face and bore. I can't seem to detect any defect at the tangent points with a cast of the part, and disregarding the slight shortness of the TNR in Y that is what I would expect. But the sharp at the point of tangency has to affect the surface finish along face and bore. The finish required is usually 32 max but sometimes 16 max. I've never been rejected for surface finish or size and this is a 30 year customer. Full disclosure neither I nor my customer can actually check the finish on the radius we can check the face and bore. The longstanding agreement is a close visual inspection of the radius. I really can't detect any problems with this flawed condition.
But the inserts do cost $30 each. Should I be expecting a better tangency condition on the insert? Should I complain? We used to have a very good PH Horn salesman that would come by but he retired. He would have been great to talk to. But I've seen nobody from PH Horn in probably 10 years so phone support is likely my only resource.
