Cutting Internal & External Left Hand Acme Threads on the Metal Lathe
Вставка
- Опубліковано 15 лют 2018
- More Acme Threading on the metal lathe - this time we will do left hand thread cutting. See how to set your lathe up to cut left hand threads for both internal and external threading using carbide insert tooling on a Lodge and Shipley metal lathe.
Support VintageMachinery.org on Patreon:
/ vintagemachinery
Make a one time donation to VintageMachinery via PayPal:
www.paypal.me/VintageMachinery
Please Visit: www.vintagemachinery.org
Sponsored by:
American Rotary Phase Converters
www.americanrotary.com/?sld=k...
Use checkout code "Vintage10" for a 10% discount on all AD, ADX and AI converters!
I really enjoyed watching the making of the acme shaft and nuts to match. I' m looking for a book that explains all details of cutting acme shaft threads and nuts as I need to build a wood lathe for my sawmill for building specialty cuttings of wooden posts and customer different applications. I have been watching your blog for over six years. Starting back when you were working on the old steam train. I would like to build a miniature steamer for my property out here in California. Looking for forward to your help. Thank you Woody
It looks great! As soon as I get started on the table, I'll definitely take many photos and some videos. Thanks much.
Keith I love your new shop and respect and admire all the work you have accomplished, but sometimes the charm of that old beat up lathe with its lengthy ways and the interruption of the engine's whistle touches a smile onto my face.
yep its classic keith, what we came for, sometimes the fancy shop is a little distracting
its only paint that looks bad the lathe is great . but i do agree lol. i liked how the train ended the segment ,classy!!!
After watching this I feel confident that I can machine a new cross feed screw for my 16" South Bend.You and your fellow UA-cam machinists are my heroes (right up there with the cute cat videos).
Great video nice and calm atmosphere, love your shop.
The whistle in the background made me smile. Apparently I've missed the museum noises in your videos.
Looking forward to seeing this in Jacks table.
I posted a short video of the finished table at ua-cam.com/video/eCbgISAUdnI/v-deo.html
I really enjoy the tight knit community spirit between the You-Tube machining fraternity
I am amazed at how incredibly educational this channel is. It is a treasure.
I haven't attempted to make threads on my lathe yet, but I feel more confident since watching your video. Thanks for spending the time to make and post this.
Two thumbs up for the locomotive whistle Keith. I've been missing that even with the excitement of the new shop.
Very nice work and thank you for sharing all the tips on machining Acme threads.
Thanks Keith. I enjoy the shop itself videos, but it is nice to see you making chips as well.
You are a great machinist, Keith
Fun to watch these long threading jobs. Enjoyed the video!
Thumbs up! Great little project and video.. Thanks Keith
Ive never made a lead screw, this looks like fun, thank you for sharing, I really enjoyed watching
That project LOOKS great.
Looks really good, and I picked up pointers as an added benefit!
Thanks,
Keith, thank you for sharing a great video, I enjoyed it very much.!.
Another master class Keith Loved it!
The Loco Whistle was spot on!!
Nice job! 👍🏻 Sure glad I found your channel Keith! Thanks for sharing!
Great way to start the morning!
Very nice project. I appreciate your running commentary on what/when/where/why/how you are doing.
From all Us Looneytoons Thanks for showing how Acme makes threads LOL
Always enjoy your videos Keith thank you
Thanks for sharing Keith.
Good morning Mr Rucker.
Very interesting always love your videos
Your description of it not making a thick chip but a wide chip reminded me of a MAD Magazine parody of the Boy's Town motto. They changed "He's Not Heavy, He's My Brother", to "He's Not Heavy, He's Just Bulky." :-)
Very Nyce Work done Sir. Thanks for sharing light on ACME, Right and Left Handed Threads. All the best for future Sir.
Keith, magnificent edited video
Thanks for the primer. Good info.
Great to see some machine work.
Nice work as always. Many thanks.
I love your youtube ch keep the good videos coming
Looking forward to the final project pics when it's completed.
Nice job Keith
Nice video Keith!
Pretty cool😎. Them's some serious threads. Nice job! 👍😁👍
Even the Vulcan gave you a whistle when you finished threading the nut! :-)
You made that one look easy too. Nice looking shaft, it would be nice to see the table it's made for
Looks pretty good to me. I'm thinking of getting aa acme threading tool and try my hand at cutting acme threads just for fun. Thanks for the demo. Love the videos.
Very Nice! Thanks for the lesson. Take care friend.
Nice job
THANK YOU...for sharing.
That was really nicely explained Keith. I think this might be the first time I have commented on one of your videos and I find that to be strange, because they are all quite good.
Thumbs up nice work and tutorial.
chips and smoke - fantastic!!
GREAT JOB KEITH !!!!
#1 love your videos and easy voice, I have been watching Brian lately and sometimes I struggle to hear him.
You talking about me? I know on some of my older videos the audio was bad, but I thought lately I had the levels about right. I can boost them if you think that would be good. You should have said something!
The volume is fine Brian I am english and its the accent - no probs I like your channel
You have the accent! lol (Note) That"s a joke!
Nice job Keith, 👍🏼 I have yet to cut my first acme threads
Nice job. Thanks
Good morning Keith
nice job
Loved it thank you keith
Nicely done again Keith, that is going to be some table! Maybe a cameo appearance of the table when its done?
ATB, Robin
Great job
Nice work keith great on the editing to :)
Very well done. I learned somethings.
well done
Damn. Every time I hear the word acme I think of Wil-e-coyote! 🤣
Loved hearing that train whistle again!!
Thank you Keith! I would be interested to see some video of the threading dial and how you decide when to engage the half nut
Any line for even threads and any numbered line for odd threads, to be safe just stay on the same line
I cut a triple lead left internal #1 amen in a 10 inch nut for 9inch Sellars boring mill
I love the smell of cutting oil in the morning. Smells like.......victory!
I'm like you Keith I do regular threads on a lathe and then when I try to go backwards with it I get all confused. nice work
Nice woork
Hi Keith
Very nice project to watch, well done. I assume that the thread was a G3 fit. I need to make 2 acme nuts for my mill table screws which need a C3 fit.
Nice job Keith, now get cracking on that 10EE.... (lol). Cheers, Doug
Yeah, I am ready to get started, but I won't let myself until I have the 16" Monarch done!
Good
Good job again my friend I am always here but don't always comment good job good man best regards Alan
So... with feed moving other way does that make it a "lead rest" instead of a follow rest? ;)
LOL - it is just following along backwards!
Hi Keith, love your detail and expediency of your videos. I do have a general question about ACME threads. I use ballscrews to make CNC machines and the threading on those has a 'flat' external surface, whereas your turnings look angular (pointy). Is the ballscrew a completely different type of ACME, or can I produce the same 'flat' face? I intend to produce my own ballscrews for my custom CNC machines. Thank again Keith...look forward to your response. - - Walt
I guess the backlash in the handle adjustments don't matter as you use the indicator to determine absolute position?
GREAT VIDEO !! TABLE LIKE A PIE ?
Can I assume the faces will be good prior to doing the sides? Don't I need the sides to be perfect to get the faces perfected?
It would be nice to have a DRO with your tools measured out and zeroed. Then you could take a pass with a boring bar to get the hole to final size and switch to your internal threading tool and it will be at exactly 0.
So what's the next restoration at the museum???? Still want to see the matcher run with full function all knives top bottom and sides chips flying 😁 PLEASE!!!!!!!!!!!!!!!!!!!!!!!
Yeah, I want to see it too. Unfortunately, the museum has not put priority on getting the Planer Matcher in a permanent home where it can be ran. And unfortunately, it is pretty much out of my control. Not sure when or if that will ever happen at this point in time. Very frustrating to see that restored machine sitting out under the shelter rusting back up while it is not being used. As for the next project, that is up to the museum and right now, they don't seem to be too interested in giving me another project to start on. I'm ready and willing, but the ball is in their court and after the Planer Matcher, I am not going to go out of my way to find something for me to do that they are not interested in.
Keith Rucker - VintageMachinery.org too bad I did see a video of one like yours running but not the same. It's like no joy those videos are what got me watching you but has not stoped me from watching also was nice to meet you at the last bash that was so cool to see and meet everyone and John bullocks mills ha ha now if could get to meet Brain Block next bash ????? And what's happed to Killroy and eagle dust off GREEN ? No videos
Thanks for making the video. Question: were you lining up the tool at the left end to start the thread each pass by eye or were bringing the saddle against a hard stop?
Just doing it by eye, but I could have just as easily used a stop.
When cutting threads like that is it necessary to make adjustments to the follow rest as you go? Thanks and thanks for the series, it was fun and informative.
When threading, you are not removing any material off of the outside diameter, just the root of the thread, so no need to adjust unless something works loose.
It is so great watching you make turned items. Just curious, you have how many lathes in your home workshop and you use the one at the museum?
BUT, no follow rest for his home machines.
With all of his equipment, I guess that will be a future acquisition.
I have four lathes at home, but only one is currently operational and it does not have a steady rest.
Thank you, didn't mean to offend.
Did you remember the 1/4 - 20 Threads in the ends? :)
Yes, but I did not catch that on the video.
nice job :) But all the oil that is brushed on whatever there are done in the lathe - would it be an idea to mount a lubricator to the followrest, to take care of some of that oiling?
That can and has been done but brushing it on gives more control of the oil.
A recirculating coolant pump would be ideal. The lathe had one built in originally but it does not work at the moment.
for fairly Cheep pump look into Little Giant pumps at stores for ponds that is what I use to use when the pumps quit on the equipment I maintained littlegiant.com/
Before you buy coolant pump, ask Adam Booth how he thinks of the mist cooling that he is using
With a screw that size the table must be a monster.
It has about 18" of thread travel each direction. I will make the leaves for the table the maximum I can, but most likely it will be a 64"' table closed, 96" table opened up.
@24:03 I see you Keith
Do you have any reccomendations to act against deflection on a small diameter piece?
Follow rest like you see Keith using. It holds the part steady against the cutting tool.
How small do you want? A jewelers lathe can go down to about .010 in stock size and the follow rest can go that small as well. As for that particular unit, it should be able to go to whatever the smallest the chuck can handle. ua-cam.com/video/yfATsgSM9E0/v-deo.html
I think I missed something. wasn't there supposed to be a keyway for a gear in the centre or did I misunderstand?
Jack (the guy I am doing this for) wanted me to leave that step for him. He has a mill but did not have a lathe big enough to do this job.
Nostalgic hearing the train whistle in the background.
Merlin Magnus a most Logical engine...
It's a Vulcan 🖖🏽
Good to know, that's Fascinating.
Merlin Magnus LLAP 🖖🏽
Yes easier to do a left-hand thread LOL Machin shop in high school did a left-hand thread on my hammer handle.
Maybe this question has been asked and answered but with all the time, effort and money you have put into your own machines what went wrong such that you had to use the museum lathe?
He realized he needed to use follow rest and has none for lathe at home. Have a great day!
My lathe has an issue with reversing the lead screw for left hand threads. Never knew about it until I tried to do it for this project so now I have to figure out what is going on. I think it is pretty simple, but just did not have time to deal with it right away. It works fine for regular right hand threading and turning. And then I also realized that I needed to use a follow rest and I don't have one for my LeBlond lathe at home but we did at the museum.
Keith, noob question - if you ran lathe in reverse would you cut left hand thread R to L?
No. The only item that changes direction for right/left threads is the tool cutting angle and the threading/feed screw direction. Reversing the lathe reverses everything. The way I remember it is simple Start in left for Right, go out right for Left.
No actually you cannot. Take a look at the angle of each thread, the tool to cut the thread has to travel in the same direction as the thread. Try reversing that direction and you cut the opposing thread.
Looks like this has already been answered. If you run in reverse without changing the direction of the lead screw, it will still cut the same thread. But, as you pointed out, if you turn the tool upside down it reverses everything. I personally don't like cutting upside down because I cannot see what is going on as well, but some folks prefer doing it that way. As with so many things in the machine shop, there are many ways to accomplish the same task, and as long as what you are doing works, none are wrong (or right).
Is my brain broken, or are the LH and RH nuts identical, just one turned around?
I’m going to reply to my own question. Of course they are not identical. Just took some more thought.
Beats me why people work away from the chuck with left hand threads. It is a real pain when cutting metric threads and you have to leave the half nut engaged.
If you have a chuck that screws on to the spindle you wouldn't want to run the lathe in reverse. That might make the chuck spin off. Left hand threads are a little easier for that reason, because when you are feeding away from the chuck you can just let the carriage continue on once it's off the part. You can release the half nut right away if you want, but there's no danger of it crashing, so you can take your time. That's not the case if you're feeding towards the chuck because there is the danger of crashing the lathe if you don't release the half nut in time. Joe Pie has a good video on threading away from the chuck, but you can only do his trick if you have a Direct mount spindle or a cam lock spindle. Smaller machines typically don't have those types of spindles.
@@gabrielbonannoo Some people should just stay off a lathe. It is a bad habit to take the easy way out all the time, and then be unable to perform a function when you need to. Sometimes I have to cut threads in tight areas using a center. Sometimes I am picking up a thread. Sometimes the thread is a double lead, and metric. If you are working in a shop with "Spin on" chucks at this point in time, it is time to move on.
@@oldgoat1890 Was there at time many years ago when you were learning how to use a lathe, and then cut threads? If you read the comments from others, there are many who are just in the process of learning how to cut threads. First time I did cut a simple RH thread I had my heart in my mouth - I also screwed up a few threads using a lathe lathe designed for imperial threads which also had the capability to do metric threads - learnt not to disengage the half nuts. The point is, let others learn how to cut threads, which ever is easiest way for them - Keith is showing that. Then at a later stage they can learn to pick up a thread or cut acme or trapezoidal, external and internal threads in either left hand or right hand. I am glad you are well past that point with your equipment and skills.
Is it safe to breath all that oil vapor? I assume it is safe because I have seen hundreds of Machinist do Machining with oil and no ventilation that can be seen.
puts hairs in your beard, probably
Jusb1066 at least it makes yer beard shiny! 😜
I am quite sure that somebody somewhere has done a study that says it is dangerous. And somebody else has done a study that says it is safe. Most machinist that I knew growing up breathed this stuff every day and they all lived right up until they died. Bottom line, I don't know, but like most things, it's the dose that makes the poison. No more than I am breathing, I doubt it is doing me much harm. Too much of even a good thing can still be bad for your - moderation is the key!
For the sake of precision, wouldn't it have been better to use a slightly smaller drill and then bore the last thousands of the hole in the nut? The hole looks awfully off center due to the drilling.
Funny,"Screw up on a threading job".
Yeah, and usually when I screw one up, it's that "last pass"....
You cheat u use inserts