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- เผยแพร่เมื่อ 4 ต.ค. 2024
- My machine, and I would assume many other budget import machines, has a major design flaw in the way the gib screws are adjusted. In fact it is SO POORLY designed that it is almost impossible to properly get the gibs adjusted. Thankfully it's an easy any inexpensive fix and I will show you how I did it.
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Better late than never 🤷🏼♂️ 😬 glad you got it figured out.
you and me both
Good catch. Shame it took so long to find. Thanks for sharing.
Thanks for watching! It just goes to prove, "you don't know what I don't know"
Very good information. I'll keep the infomation in the back of my mind so if and when I buy a used old lathe I can look and see if it's like yours then upgrade like you did. Thank you.
glad I could help
Yup, this locking double grub screw set up has caught me out before. Not on lathe gibs but on what should have been a straightforward dismantling job. Fiendish idea. Guess it's why apprenticeships are useful! It's not a mistake I will make again ....
It is a "you don't know what you don't know" kind of thing If I hadn't gotten some gib adjustment from the out screw I would have investigated further and figured it out rears ago but there was no indication that I needed to look.
Hi, a tip for adjusting the cross slide gibbs. Disconnect the cross slide screw first, this gives a much better feel for the adjustment as one moves the slide by hand. Not my idea, it's a George Thomas recommendation.
That is a good tip. My machine does not yet have a half nut so that would not work for me.
Very cool. Thanks for sharing.
👍
The two screw design should have a ball bearing between the two screws. Thats where they saved money,
even with a bearing between the studs it is still an inferior design. Completely removing one set screw to get to the other is in efficient and then there is back lash. As you tighten the outer screw it will push the inner screw up against the threads, probably not more than .001" but enough to effect your adjustment. The single stud jam nut is far superior all the way around.
Took you 15 years to figure that out?? BTW- many other 3 in 1 machines already have the jam nut design on them.
I will admit it is a little embarrassing. I am mostly self taught, I got this machine in 2013, started making chips and figuring out things as I went. I am very mechicanly inclined can fix, or fabricate just about anything. Problem is the set screws had an effect on the gib adjustment and with a lot of time and effort you could sort of make them “work”. I spent hours getting it close but then it would loosen up over time. There was no reason to dig deeper because what I was doing was almost “working”. In retrospect it seams obvious but some times you simply don’t know what you don’t know 😁
Once again. Made In China, But fixed in the USA.
That’s how I roll!!!
I've seen a couple of those "double screw" setups. My old 3 in 1 had brass rod bits that were pushed in against the gib by grub screws. Whenever you pulled the tailstock off, the gib and 2 little brass pieces would fall out. If they fell to the floor then good luck finishing your project that day; you'd be on your knees, face to the floor trying to cast shadows on the small parts with a flashlight (CSI style). I'm so glad those days are over.
Here's what I did for a gib lock on my 3 in 1 - th-cam.com/video/R5PCcjXjmVk/w-d-xo.html
What are those rubber leadscrew protectors?
I have steel free floating pins on the locking adjustment and have also had to play the "find the pin" game after removing parts. The leadscrew covers are an upcoming video. Either next Thursday or Thursday of the following week, but if you want a better look at them sooner they are in full few at the end of this video th-cam.com/video/ycIlDc5BZX4/w-d-xo.html
as promised here is more info on the leadscrew covers th-cam.com/video/tFBjC9wLRD0/w-d-xo.html
Cool stuff, dude. I just picked up a very similar machine from an auction and will definitely be binging this channel. The bare bones functionality of this machine seems to induce as many cravings as it satisfies.
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