Precision Swiss live centre hacked back to life
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- เผยแพร่เมื่อ 1 ก.ค. 2023
- So, I got given a Gepy live centre, that a friend picked up at a flea market. It's buggered for precision work near the centre, but it's OK for supporting long pieces if you're working near the chuck. I can fix it, right?
Inspection reveals (or rather, doesn't reveal) the bane of items from flea markets - missing pieces - and (spoiler alert) they appear to be made from unobtanium. So while I try to find a better solution, I bodged up a fix. Surprisingly, it works pretty much out of the box. - วิทยาศาสตร์และเทคโนโลยี
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I don't think it's missing a roller race, just a set of loose rollers 2mm dia x 7.8mm long. They're a standard size and readily available.
That could well be the original setup, it's kinda how the catalogue picture looks. My "proper fix" option was getting a handful of 2mm rollers, and making up a one-ended brass cage. Although probably an easier solution to that would be to find someone with a 3d printer, sounds like a perfect solution for one of those.
But yeah, time to call my mate who works for SKF and get him to grab me a handful of rollers :)
Thanks for the pointer to the size, man. Much appreciated.
@@wibblywobblyidiotvision My guess would be that it was just a packed set of rollers and no cage, similar to the needle roller bearings in vehicle universal joints.
@@sooty655 Sounds likely. I'm waiting on my friend :)
Fantastic job!
Cheers, man. It's a bodge, but it's way better than it was.
Nice work
Roller bearing without a cage is just a normal 'crowded roller bearing'
It was pretty common but caged rollers use less of the 'expensive', heat treated bearing steel with a cheap plastic cage filling in the gaps.
Doing just one bearing shouldn't cost much but when you make them in millions I guess it adds up?
I would probably use gear oil as it's designed for high pressure situations although I doubt you'll be putting as much pressure on centre as a 40 tom truck does on it's gears
Cages are used because you can't fill more than about 50% of the bearing with balls without having a slot to feed the balls into the bearing.
@@MF175mp Crowded ball bearings are used but they are more labour intensive as they are not assembled by machines. Irrelevant anyway when we were talking about needle bearings
@@1crazypj Yes, needle bearings like this are a different story of course. I might've read the comment too quickly the first time
👍🏻
Why don’t you work on a nice work bench instead of on a vice
That's a fair question, or it would be if it was actually a vice and not the top slide of my lathe. As to why I'm working on it rather than a nice workbench, well, it's clean, big enough for the job, and my workbench is far from nice at the moment :)
@@wibblywobblyidiotvision There is something strange with workbenches, it doesn't matter how big they are, they always get full of stuff anyway.
Your content is good but your audio is terrible .
Thanks. For the audio, it is what it is. I'm not some high stakes youtuber, I'm a twat with a shed and a Canon G9X; the audio is simply what comes from that. No, it's not great, but there you have it. you get what you pay for (and that's part of why I would strongly suggest installing an ad blocker so you're not paying).
Happy new year
@@wibblywobblyidiotvision , Didn’t mean to be so negative , just thought there may be something wrong with your audio that you weren’t aware of . Hope you channel grows and you have a great new year.
@@mrc1539 No worries, man. A lot of the noise when machining comes from the camera's mic picking up all, and I do mean all, of the whine from the VFD plus the noise from the lathe motor, plus.... When the Mill's running it's worse, there's no VFD but there's a second motor running as a rotary phase converter...