Threading on a Plain Turning Lathe
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- เผยแพร่เมื่อ 13 ก.ย. 2024
- As requested, here are details about the Hjorth threading attachment, and about threading on a plain turning lathe in general. We also use the Hjorth threading attachment to make a replacement screw for itself!
Music: "Endless Ashes" by Swarm of Eyes
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I really enjoyed this !! Not only was it informative, but it was very relaxing to watch. I have at least 3 plain lathes I can apply this to, a Rivett 504 and an Ames BC among them. Thank You!
watching this again . looking for ideas. thanks again
I'd use the attachment just because it looks so interesting. I think it's the u-joint setup that I love - it has that real mechanical look and feel.
thecogwheel I agree! It almost makes me want to look for excuses to use it... like that screw I made that would have been much quicker to thread with a die. :)
Subscribed! I don't know why I hadn't earlier.
Very interesting gear you've got, thanks for sharing it with us. I'm so glad to have found another growing machining channel, a few guys have faded, and some have even turned into show and tell for their tool-hoarding habits, LOL! I like seeing tools, but it's always better to see them getting used to make stuff, right? Right!
I'll be catching up on all of your content while waiting for your next vid, and that should tell me if my favor is even necessary, but since I'm thinking of it now I might as well "Getter Done!", LOL! I got a little bit lost when you skipped around showing the threading attachment, and I'd love it if you showed the whole thing laid out on a table, like in an expanded view. It would just really help me put it all together in my head, and the parts you did show made even more curious about the assembly as a whole, and in pieces.
I know it's too late now, so no big deal, but I just thought I'd share what helps me(and others I'm sure) to learn as much as possible from videos of this genre. I hope it doesn't sound like I'm whining, especially on my 1st visit, but I am subscribed now and want your channel to grow and lasts a good, long time.
Thanks again for the videos, Aloha...Chuck.
Hi Chuck, thanks very much for taking the time to comment and provide feedback! Thanks also for subscribing, and for the encouragement. I would love to see this channel take off as well. I agree very much about putting these tools to use, as they were intended. In fact, that was a condition of my receipt of the Hjorth equipment, that it be put into use and not split up or sold off. I hope you don't have to wait too long for the next vid, I'm still have some raw footage left to take before I start editing for it so it could be another week.
Have you done a video on how you set up your compound for perfect parallelism to the axis of the system? I did see, somewhere, a description of a locking/position fixing setup for the compound "zero"...thanks!
My rivett is just like yours. Just mine has been treated little rough by previous owners.
Very cool! Don't see many of them around, so always nice to run into another Rivett owner. :)
Are you using boring bars for regular cutting in your eccentric holder?
well thanks for another great video. I dont have a take off point on the end of any of the numerous slides i have, so i guess if i was to make this style of attachment then that might be a starting point. thats a good book, I have a copy , anyone with a last name like Levin probably knows about precision lathes.
Emmas Spareroom Machineshop Thanks as always, Emma! I love an engineering challenge, if you want to email some photos of what those compound slides look like, I wouldn't mind making some suggestions. joyofprecision at gmail dot com
Thanks very much for this video. I have a screw cutting attachment for my Schaublin 70 which I have been dying to use except that without specific instructions for this I’m afraid I’ll do some damage to it. The main issue which you alluded to being that the spindle speed cannot be reduced below 300rpm which seems very high for threading especially without a clutch mechanism to quickly disengage it. Perhaps there is a way to turn the spindle by hand for this lathe although I am yet to have seen this.
In any case you have so far provided more instruction on this topic than anyone I’ve found so many thanks again!
Can you thread in the reverse direction with your Schaublin? It's a great way to avoid running into the headstock/chuck, and for doing inside threads...
Interesting to see one of these in use with single point threading - I have one of these attachments for my Lorch AVI-RG lathe ( flic.kr/s/aHskPvnWpL ) which includes a dog-clutch for detaching the feed at the end of travel. I haven't got my hear around though what the required conditions for re-engaging it are, so I've not yet managed to create a valid thread. I get a few passes in the same place, but always manage to ruin the next one... There's another one at th-cam.com/video/TYMIDhVYLGg/w-d-xo.html also with a dog clutch similar to the Lorch, but no indication if whether it can be used to re-engage when screw cutting, which might of course be less of an issue with thread milling in any case.
Very nice lathe(s) by the way !
Beautiful, I love those Lorch lathes! :) Neat to see a couple of attachments with dog clutches too. As you say, though, there's no way to reliably re-engage during a threading operation with only the clutch, unless you put timing marks on all your gears and make sure they all line up before re-engaging the clutch in exactly the same spot. Conventional lathes get around this problem by using threading dials or thread counters, they ride along the lead screw as the saddle moves and you can use the marks on them to re-engage with your threads for each pass. For these threading attachments, though, you'd need something that engaged with the lead screw inside the compound slide, it would be a real challenge to design something and and I think you'd necessarily lose some travel with any design.
A 3 phase driven by a VFD with a braking resistor could get you a faster stop.
Yep, definitely. Actually all the VFDs I've seen (even the cheap ones) have programmable decel. Only potential danger is if you have a heavy chuck threaded on, an aggressive decel can cause it to spin off. Happened to my dad on his SB, a 10" chuck spun off, bounced off the bed ways, hit him in the chest, and knocked him across the shop. But I digress. Ultimately I plan on having all the Hjorths set up with 3 phase motors run by a VFD... it's just such a nice setup.
Music in the previous videos was great. The noise in this one awful. Have that Stefan fellow set you up with some real metal.
I'll have you know this is world class metal, sung by your favorite person! :D
i loved it such a contrast to the work happening , and its not the same 20 second dilidee repeated over and over . thank you sir and ROCK ON