NeedForFeed
Plastic
- Joined
- Jun 29, 2020
Hey folks. I'm pretty new to machining in general so go easy on me, but I have an issue with chatter/lousy finish on these parts that I'm trying to bore, figured maybe you guys might see something that I'm missing.
I'm running a Mori Seiki NLX2500, trying to bore a 42mm hole about 9 1/2" deep into M2, and the finish has to be good enough for a slip fit to go with another part I already finished. I'm using a 14" indexable boring bar, choked up as tight as I can get, with a 1 1/4" diameter. Currently set to a feed of 0.003ipr, 80CSS, and cut depth is about 0.005".
The problem I'm having is that aside from being as loud as all hell, my finish is like sandpaper. I also can't get a consistent cut. I'll measure it, see that I need to take off another 0.010", adjust for that with tool wear, take a cut and measure again only to find out that I only took off 0.002".
I've tried rubber bands on the part, masking tape on the boring bar, electrical tape on the boring bar, electrical tape and a shim, and I even tried swearing at it, but nothing I do seems to affect it. Any ideas of what I'm missing?
I'm running a Mori Seiki NLX2500, trying to bore a 42mm hole about 9 1/2" deep into M2, and the finish has to be good enough for a slip fit to go with another part I already finished. I'm using a 14" indexable boring bar, choked up as tight as I can get, with a 1 1/4" diameter. Currently set to a feed of 0.003ipr, 80CSS, and cut depth is about 0.005".
The problem I'm having is that aside from being as loud as all hell, my finish is like sandpaper. I also can't get a consistent cut. I'll measure it, see that I need to take off another 0.010", adjust for that with tool wear, take a cut and measure again only to find out that I only took off 0.002".
I've tried rubber bands on the part, masking tape on the boring bar, electrical tape on the boring bar, electrical tape and a shim, and I even tried swearing at it, but nothing I do seems to affect it. Any ideas of what I'm missing?