- Joined
- Feb 4, 2014
- Messages
- 185
Hello All!
So I have had my Grizzly 4003G since August of 2012 and It had been an absolutely fantastic machine. It is used multiple times a week for at least an hour per session. It had never been crashed, tipped, or mangled in any way shape or form. I would like to think that I keep it in pretty good condition as I need the tolerances as tight as possible (As we all do).
Just last week I was turning some 6061 aluminum and noticed that there was lots of chatter marks on my piece. I was taking light cuts and using fluid. I have never had chatter marks on aluminum before! I just figured it was some bad aluminum or something of that nature...:thinking:
I was in a rush, so didn't put much thought into it. But today I was turning some stainless and there was huge amounts of chatter on the piece, and audible squealing.(I've never had problems with SS before) So I reset everything, fresh cutter edge, and tried again. Same results...So I moved onto mild steel, then aluminum again and the same horrible chatter. My stick-out was only an inch or so and even when I put my live center on it, the piece still had chatter marks.
I double checked all of my gibs, rechecked my tool height, made sure every nut and bolt was tight on the machine, double checked it was still level, and pulled out my favorite machining 12L14 stock to confirm...Same chatter!!! anic:
So...It appears as though I am in need of some serious help! Both with my machine and mental state at the moment! (I don't want a $3,000 paperweight!)
I'm afraid it may be bearings that are causing my problems, but I have no idea how to approach confirming that is the problem or how to replace the darn things...I'll admit I have very, very little knowledge of bearings at all, and am a bit intimidated by the though of pulling apart my Lathe.
Thanks in advance for anyone providing some help!
So I have had my Grizzly 4003G since August of 2012 and It had been an absolutely fantastic machine. It is used multiple times a week for at least an hour per session. It had never been crashed, tipped, or mangled in any way shape or form. I would like to think that I keep it in pretty good condition as I need the tolerances as tight as possible (As we all do).
Just last week I was turning some 6061 aluminum and noticed that there was lots of chatter marks on my piece. I was taking light cuts and using fluid. I have never had chatter marks on aluminum before! I just figured it was some bad aluminum or something of that nature...:thinking:
I was in a rush, so didn't put much thought into it. But today I was turning some stainless and there was huge amounts of chatter on the piece, and audible squealing.(I've never had problems with SS before) So I reset everything, fresh cutter edge, and tried again. Same results...So I moved onto mild steel, then aluminum again and the same horrible chatter. My stick-out was only an inch or so and even when I put my live center on it, the piece still had chatter marks.
I double checked all of my gibs, rechecked my tool height, made sure every nut and bolt was tight on the machine, double checked it was still level, and pulled out my favorite machining 12L14 stock to confirm...Same chatter!!! anic:
So...It appears as though I am in need of some serious help! Both with my machine and mental state at the moment! (I don't want a $3,000 paperweight!)
I'm afraid it may be bearings that are causing my problems, but I have no idea how to approach confirming that is the problem or how to replace the darn things...I'll admit I have very, very little knowledge of bearings at all, and am a bit intimidated by the though of pulling apart my Lathe.
Thanks in advance for anyone providing some help!