- Joined
- Mar 22, 2013
- Messages
- 498
I dont think its anything bad with the spindle bearings, it really doesnt seem like that. Maybe try to snug them up just a little, see if there is any change? I've only ever seen one bad set of spindle bearings causing problems in my life, and it was every turn. What you have doesn't look like that at all. At least what I am seeing in the picture.
I will have to try some parts on a machine this week too. If you didnt have good results on another machine, I would say it could be too light of a cut or in the tool, .002" feed rate is pretty much just rubbing. Any time I get a mirror finish on a part with carbide, its a lot faster feed rate, and I don't use the triangle carbide inserts, never had much luck with them. But you said it worked fine on the smaller 9x20, but I also assume that one was a belt drive machine?
At a .002 feed rate, any time I do it with carbide, or really any tool, even HSS, I get tears in the surface and just a bad finish overall.
I just can't look at the pictures and decide if its really bad, or if its nowhere near as bad as I might think, I wish I could see it in person, so I can compare with a cut I'd take. When you have time, try the thing with the link belts, leaving it as loose as possible to get it to still turn OK. Just trying to eliminate that pulley. Or like I said we can swap them out, but the pattern looks to me like its a lot farther apart than one turn of the pulley.
Any way you can post a video of the cut in action?
I know a lot of people go to the 3 phase and VFD to get the Best finish. Lots of option out there, I am just thinking out loud here really, but if its something as simple at that pulley, thats easy.
I will have to try some parts on a machine this week too. If you didnt have good results on another machine, I would say it could be too light of a cut or in the tool, .002" feed rate is pretty much just rubbing. Any time I get a mirror finish on a part with carbide, its a lot faster feed rate, and I don't use the triangle carbide inserts, never had much luck with them. But you said it worked fine on the smaller 9x20, but I also assume that one was a belt drive machine?
At a .002 feed rate, any time I do it with carbide, or really any tool, even HSS, I get tears in the surface and just a bad finish overall.
I just can't look at the pictures and decide if its really bad, or if its nowhere near as bad as I might think, I wish I could see it in person, so I can compare with a cut I'd take. When you have time, try the thing with the link belts, leaving it as loose as possible to get it to still turn OK. Just trying to eliminate that pulley. Or like I said we can swap them out, but the pattern looks to me like its a lot farther apart than one turn of the pulley.
Any way you can post a video of the cut in action?
I know a lot of people go to the 3 phase and VFD to get the Best finish. Lots of option out there, I am just thinking out loud here really, but if its something as simple at that pulley, thats easy.