Brass/bronze is very grabby and sometimes when drilling it, you can make it drill nicer by stoning a small flat on the drill's cutting edges to stop it digging in, but when you counterbored it on the mill, you should have locked the spindle in place and applied the feed by lifting the table, this is more rigid than using the quill downfeed.
One of the simplest ways to reduce chatter is to change spindle speeds so that whatever is flexing doesn’t resonate. Spotfaces and counterbores seem to be particularly susceptible, unfortunately. VFD on spindle drive can be handy for this.
I think you were getting chatter like that because you're working with brass, basically. It wants to pull your end mill into it because it's soft. If you slightly engage your quill lock so the brass can't pull the cutter in it usually works. Alternatively, you can use your fine feed. This prevents the quill from being sucked down by the cutter. Just an opinion from my own experience. Roger from Calgary.
That's a great design!
Excellent job!
Excellent work 👌🏻👌🏻👌🏻
Thanks!
I like it. Nice work.
Thanks!
Brass/bronze is very grabby and sometimes when drilling it, you can make it drill nicer by stoning a small flat on the drill's cutting edges to stop it digging in, but when you counterbored it on the mill, you should have locked the spindle in place and applied the feed by lifting the table, this is more rigid than using the quill downfeed.
I definitely want a kit!
Great to hear. I’ll get working on that.
One of the simplest ways to reduce chatter is to change spindle speeds so that whatever is flexing doesn’t resonate. Spotfaces and counterbores seem to be particularly susceptible, unfortunately. VFD on spindle drive can be handy for this.
OK great, thanks but the advice.
I would be interested in the kit.
Great to hear. I’ll get working on that.
I think you were getting chatter like that because you're working with brass, basically. It wants to pull your end mill into it because it's soft.
If you slightly engage your quill lock so the brass can't pull the cutter in it usually works. Alternatively, you can use your fine feed. This prevents the quill from being sucked down by the cutter.
Just an opinion from my own experience.
Roger from Calgary.
Thanks Rodger, good advice.
9:00 too much rpm
Thanks!
Sweet.
Thanks!
Nice work. Whats this polishing stick?
Thanks. The brand name is Cratex, a rubberised abrasive.
How long do they last? @@joneseymakes
Slow the spindle speed down to reduce the chatter.
Ok great, thanks.
NOICE
Chatter due to either wear on spindle bearings or backlash on spindle drive gears. Or to much play on feed gears.
OK thanks, I will check it.