01-27-2015, 09:09 AM
You are finding what works for you and your machines. Cold rolled 1018 is FAR more difficult to get a good finish than 12L14, and it seems the lighter your depth of cut, the worse it is.
A chipbreaker in the tool always helps keep stringy chips from getting caught between the tool and work because they just curl up and drop the chips. The leaded 12L14 is better at breaking chips than 1018 CRS, I love it. It's also pretty easy on tools.
So was it the Keith Fenner vs. Abom videos of using HSS that you watched? That was entertaining, though neither guy really uses HSS all that much. They both have bigger machines and workpieces than most of us and can push some insert tooling pretty hard. That's more like what I prefer to do when making axles for motorcycles out of the 316 stainless, because I'm impatient and want to get the 1" (or bigger) stock down to the 10mm or 12mm finish diameter in minutes rather than hours.
The shear tools work great just for finish cuts. You can see now that with the right tool geometry you can get good finishes with a deeper cut too.
A chipbreaker in the tool always helps keep stringy chips from getting caught between the tool and work because they just curl up and drop the chips. The leaded 12L14 is better at breaking chips than 1018 CRS, I love it. It's also pretty easy on tools.
So was it the Keith Fenner vs. Abom videos of using HSS that you watched? That was entertaining, though neither guy really uses HSS all that much. They both have bigger machines and workpieces than most of us and can push some insert tooling pretty hard. That's more like what I prefer to do when making axles for motorcycles out of the 316 stainless, because I'm impatient and want to get the 1" (or bigger) stock down to the 10mm or 12mm finish diameter in minutes rather than hours.
The shear tools work great just for finish cuts. You can see now that with the right tool geometry you can get good finishes with a deeper cut too.