Making A New Cross Feed Screw | Lion Lathe Restoration
2024 ж. 1 Нау.
32 409 Рет қаралды
Last year we demonstrated repairing a worn lead screw - this time we're going to take a different approach: putting our new follow rest to use to help us build an entirely new one.
“Overkill” should be your middle name! Nicely done, and I really enjoyed watching you work. Thank you!
Glad you enjoyed it
Once you make it wrong its too late......
There is no such thing as overkill. Nobody complained when something was super dead. However, they definitely complain if it's not dead enough. They generally let their displeasure be heard with screams and dying. Just sayin.
When making undercuts for threading, the shaft will be stronger if you leave a radius in the corners by using a round-nose grooving tool instead of a cut-off tool.
Yes you are correct. with the force on these guys it is fairly unlikely the shaft will break in general. It is more likely to wear then snap. In theory you are correct.
Well done, end result looks good. Rolled lead screws are generally stronger due to strength hardening but in general are less accurate depending on the manufacturer tolerances. Edit: and forgot to mention, you should be using flood coolant or more thread cutting oil.
Don’t have flood on it. I limited oil for video sake
Ive never cut an acme thread, really enjoyed watching that
Thank you. They are fun
You do a fantastic job with these long form project videos. They are great, thanks for taking the time to make them for everyone!
Absolutely
I really enjoyed this video with you challenging yourself to see how accurate you could be. It's rare that we don't make a flaw while making a complicated part. It speaks to your confidence that you pointed it out for all to see. Nice job making that part and documenting it.
Yeah mistakes are inevitable. Glad you enjoyed it
Hi Kyle, Thanks for sharing yet another great video. Always nice to follow you and your work on KZhead. If I may, I suggest you use lathe files to do your edge deburring and chamfering. Also when cutting your threads, if there is the slightest amount of burr, it will score badly and immediately your brass points on the steady rest. This job you did is quite challenging and I hope that once you get the nut done, it will be perfect the hole way on the screw. As for the key way, I would probably used the climbing method as it would put the cutting force on the jack, witch is the reason for using one. Otherwise you get a lifting force and increase tool and part vibration/deviation. You did well to reduce the RPM on the acme thread cutting. Make sure you lubricate intensively as you cut such thread. Tool pressure is immense, as well as contact area. I endorse cutting oil!! God Bless.
Thanks
Love the follow rest, that’s a great set up. I learn something new every video you make.
Does the overall length not matter?
Awesome, thank you! Steve
It’s the same it looks shorter due to camera angle
Nice job. Follow rest was awesome!
Thank you
This was great to watch. Nice work!
Glad you enjoyed it!
Great video, enjoyed watching the process. Cheers
Thanks
I think you should do as I did and add a drip oiler to your rest. It's one less thing to worry about, and it's simple in construction.
Maybe good idea
You should always put a radius on the bottom of your thread relief cuts. It will make the shaft much stronger, and less prone to stress cracks in the shoulders.
Your correct
Great video. I enjoyed watching the thread cutting process. I’ve only done a few threads and fought with each of them. However, there is hope as they seem to be getting better. Thanks for all the good effort and camera work.
Thank you
You are brilliant and proud of your work. All of the Best for your future projects. Cheers.
Thank you
wonderful work, thank you for sharing, Paul in Florida
Our pleasure!
Beautiful work 👍🏻👍🏻👍🏻🇬🇧
Thank you
Nice work as ever and logical, always funny to see folks still working to banana dims .your fixture table ranks alongside Stonehenge for the “durable” status.love it
Appreciate it thanks
It is for you so only underkill applies, Nice work you had more guts than me during chatter segments. Ray Stormont
Appreciate it Ray
you should get a mist lubricator lot easier than a can of oil. Kool Mist 60M12 PORTaMIST Unit, Magnetic Nozzle Positioner, 12" Flexline. topper machine uses it a lot in his videos
I got one oil works better on certain occasions
love your narration .......
Thanks paul
You do nice work
Thank you
Well done. 👍
Thank you! 👍
Your processing skills are truly amazing.🎉🎉🎉🎉🎉😊😊😊😊😊
Thank you
Great explanation and detail. Subbed here.
Thank you
Good stuff
Thanks
I think everyone has said it for me! Thanks
Yep
Turned out great. I think your cross slide screw is as long as the bed on my South Bend. LOL!
lol maybe so
A follow rest? Is that how its referred to in the US? In the UK we call it a travelling steady.Great videos by the way.🤙
Ok cool good to know
Yes, it "follows" the tool. Traveling steady works too.
Does that Pacemaker have thread reversing on the Apron? Most of the ones that I operated in the Navy Yards did. That's a handy feature to have if you do a lot of threading. No need for using the thread chasing dial, just engage and reverse. The lathes that had it also had stops.
Yes it does I should use it more often
@@VanoverCustoms😊
Great video, enjoyed watching your process and attention to detail along with your narrative. Your follow rest worked great. Q. You probably mentioned or it maybe an optical illusion but the shafts side by side appeared to show the new on much shorter than the original, please explain. Thanks for sharing.
Yeah I looked again at the shot it does look shorter, it’s not though wide angle lense for ya
Metric is a standard thread pitch worldwide, just not in Murica.
I know lol
As you tighten the follow rest between passes, how do you know (or verify) that you are not forcing the shaft out of alignment?
It is a feel more than anything
@@VanoverCustomsit’s interesting. I can’t really think of a good way to put an indicator on the acme thread. I’m sure someone has figured this out.
@@ptv1250great idea, thanks!
Saya suka ini
Thank you
Why not use some ball bearings on the follow rest instead of the rubbing brass ? Is that done ? Pros/cons ?
Bearings are good for steady rests but but good on follow rests since the bearing traverses the part. Especially on low tpi threads a bearing could get caught between threads
@@VanoverCustoms ok so the brass does not get caught because of it's extra width. So, use a wider bearing ? I am just wondering why use a part that rubs and wears when a rolling part is possible.
With rollers there's a greater chance of getting a chip caught in the rollers than with solid brass contacts. Roller type steady rests are usually further away from the cutting tool and the rollers can be shielded from chips if necessary. @@bschwand
I think the answer you are looking for is... Rolling bearings, no matter what the size, are made with hardened materials. Which in turn, can damage anything softer. But, they are lower maintenance. if you watch CEE videos, you can see him using a Steady Rest with Roller Bearings. When he's done, one can see impressions in the work piece, and I'm not talking about the corrective cuts he makes for the Steady. The impressions are inside of those. Being construction equipment, not a big concern. Time is money, and he has customers to keep happy. Bearing Brass is softer them 90% of what you are going to turn, so, no damage to you work. But, in turn, you have to sacrifice some Bearing Brass. Higher maintenance. Both have there pros and cons. It's more about your needs.
How come it is shorter?
It’s an illusion
el polvo de esmeril malogra, la bancada del torno, esta debe de protegerse bastante
Agreed
Why is it shorter than the original?
Nope it’s an illusion
What material did you make that screw out of?
Stress proof
@@VanoverCustoms Okay I understand that What type of stress proof What type of material was it? Was a tool still, 12L14, 4140?
1144 stress-proof. @@chuckbeckley7894
I believe 1144 is what people usually mean by stressproof@@chuckbeckley7894
@@chuckbeckley7894 I believe it was 1144 which is generally called "stressproof" because it's been heat-treated to relax stress. Neither 12L14 not 4140 are called stressproof.
"Honey!!! It's happening!!!"
Lol
Is it shorter? or just looks shorter?
Same length
I don't believe they're the same. I wanna see then close together. They totally look like different lengths.
@@ericsills5290 ok
nice work but 1144 will not last but may be better than what was in there.
Agreed
Listen A new cross feed screw
Yeah
By no means am I a machinist but could you not put a pair of shoes on the follower rest for better support on the threads
Yeah but clearance can be an issue with a larger contact area
you should learn a bit about feed and speed, it disappeared as much from the saw blade as the shaft .. by the way, the vibrations came from too little chip depth, the shaft is meant to be pressed up against the support otherwise it will vibrate + you can drive 5 times faster in revolutions
👍
1144 steel
Yep
Congratulation you building your own flow rest, NOTE with tree point tach the material. Do you have a good Lathe the casting bed has two prismatic guide . Most CHINESSE follow rest became ,with only two points MADE CHEAP $$$, WILL no good for do this type of work, only the Machinist decide the tools ,not the plant Manager. .Bay the way very good are you threading the proper way, no to many Lathe operator no this old school ,MAKE AMERICA GREAT AGAIN . Bay from ARGENTINA - CANADA.
Thank you
1 minute in: we have standard, and we have metric, so we make a standard thread.... METRIC IS THE STANDARD!
lol I don’t have a machine that can cut metric that is up and running so every will be standard until I can do metric.
This Karen got triggered hard on that one :)
around the minute 21 what was that "chatter" ?? why only in that part? is this some material composition thing? please don't do anything off camera 😢 that sucks haha good job man! r
Not sure maybe a dip in the diameter caused by wear in lathe making the follow rest have to much gap? Not sure
@@ptv1250 thanks my dude. don't think the chip trapped cuz happened more than one time but the other things you said sounds really possible. thanks again
@@ptv1250 I'm saying nothing hahahahahahahahaa I'm pretty sure you're right 👍🏻
This is how I did for similar project: kzhead.info/sun/aLSafriKbJppao0/bejne.html
Very nice
i´ll hope you dont make the screw in the same machine that you gonna use it on.🙂
👍
You lost me when you said you need a straight bit of material to use a travelling steady, you don't, all you do is have the steady following the cut, not leading it......
Sure
@@VanoverCustoms too stupid to understand so you write a stupid reply, sounds about right from what I saw in your vid.