- Joined
- Oct 15, 2011
- Messages
- 153
I have a job to machine a recess in the end of the 303 stainless round bar.
The diameter is 42mm and will require a groove in the end of the diameter - 31mm OD 13.71 - ID and 4.35 mm deep.
I have faced off the end with a carbide tool and achieved a finish that reflects the tooling, so that was ok.
Owning only a right hand carbide tool I had to to use a HSS tool to make the cut. I chose a 1/4" sq HSS blank and left it square, save for relief of about 10 degrees on front and side faces. also radiused the corners and I used sulphur bearing cutting oil.
The resulting cut chattered badly despite precautions of locking the saddle and minimising overhang on tool holder and the compound slide.
I used much lower RPMs than the carbide facing cut.
Should I grind right and left HSS tools and try those,or was the square cut HSS correct for the application or perhaps keeps reducing the RPM?
Practical advice will be appreciated.
Thanks
Ozwelder
The diameter is 42mm and will require a groove in the end of the diameter - 31mm OD 13.71 - ID and 4.35 mm deep.
I have faced off the end with a carbide tool and achieved a finish that reflects the tooling, so that was ok.
Owning only a right hand carbide tool I had to to use a HSS tool to make the cut. I chose a 1/4" sq HSS blank and left it square, save for relief of about 10 degrees on front and side faces. also radiused the corners and I used sulphur bearing cutting oil.
The resulting cut chattered badly despite precautions of locking the saddle and minimising overhang on tool holder and the compound slide.
I used much lower RPMs than the carbide facing cut.
Should I grind right and left HSS tools and try those,or was the square cut HSS correct for the application or perhaps keeps reducing the RPM?
Practical advice will be appreciated.
Thanks
Ozwelder