Video Summary
In this video, a Precision Service MTR technician walks through a detailed inspection of a machine tool ball screw after a reported issue. Using indicators, the technician demonstrates runout measurements on different areas of the ball screw, identifying excessive movement on one side likely caused by a crash. The video explains why the condition is unacceptable for continued use, how it could affect machine performance, and why replacing the ball screw is the best solution to avoid future issues for the customer.
Full Video Transcript
All right, guys. So, problem with the ball screw. We got zero here. Hopefully, you can see that without the glare. Yeah. Come around. Check the other lead.
Perfect.
All right. Come across here. That all looks good.
A tenth or two or something like that. Not that great. But so that’s not good. But the big problem that we noticed on this thing is if I put this indicator on the bearing journal, I’m moving about 30,000. So I’m going to set this thing up. Hopefully I get it.
Okay. The highest point. So now I’m going to rotate this ball screw. Just put it on the indicator throttling and we’re going to see this thing moving.
So, with that being said, I’m going to be getting a tough or hard spot in the ball screw and that’s not going to be good for the customer. So, we’re going to have to replace the ball screw. I could also go to this side. I think it’s just that side that’s bad.
Hopefully I got enough room so I have to change my setup. I got to change my setup.
Anyways, let’s see if we’re going to rotate this. You can see it’s not terrible. It could be me just pressing that. So, I’m going to grab it from the other side.
Yeah, we’re about probably 4/10, not even. And it could be me moving around. But the problem is that on the opposite side, this is probably where the crash was. And it’s about 300 on this side, and I can’t put that in.
So, we’re going to have to get a new ball screw. We’re going to show this to the customer just to prove it, just so we could show it. And then when we finish up this job, I’m going to give this ball screw back to you guys. So, if you can bend it back or whatever the case is, maybe send it out to a rebuilder, you’re more than welcome to.
But by doing this job, I just rather get a new ball screw so that I don’t have any issues. Thank you.
