Geometric Threading
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- เผยแพร่เมื่อ 10 ก.ย. 2024
- In this video, we bring out the Geometric die head and use it to machine threads on some 7/16" rods. I show you my setup in the lathe, and also in the mill for the small holes that were required as well.
I also bring out the Jefferson power hacksaw and use it to cut the rods to length.
I hope you guys enjoy, and let me know what you think,
Regards,
Adam
I like how you talk about having dads and grand dads old tools, I hope one day my boys will catch on and we'll have a legacy like your family does. You're one blessed man.
Thanks Robbie. I always cherish the tools I have that belonged to my dad and grandad. Most of them fill up my shop and I couldn't be happier. I have so many good memories of them in our old shop, and all those years growing up learning the machinist trade.
What a lucky guy I am. I kwew what a Geometric head was and I got one free. I didn't khow how to adjust it. Your video is perfectly presented and all I needed to learn was there....Thank you.
Denis
:) Brings back memories of my youth, setting up and operating 6 and 8 spindle Acme Gridley cam controlled screw machines. Thank you!
I haven’t used one of those since the late 1970’s. They are a real time saver. We used to crank up the rpm’s till that nasty old black cutting oil sizzled and smoked. Got best threads that way. Nice video, brought back memories. Glad to see someone still carrying on the old trade.
I was trained as a machinist in a camera repair shop. I made camera mounts for helicopters and roller coasters for over forty years. I have filmed myself working on my lathe, but your camera placement is second to none. The only thing I can think to say is 'Bravo!' Excellent.
I know nothing about this kind of work but as a Maintenance Mechanic I find it totally fascinating! I love how you show and explain everything. That's also a cool deal that you can start a threading and it automatically releases when its done, that's great in case you get distracted or want to multitask in the shop. Thanks for sharing what you do man. :)
Clearly this is another tool I need to be shopping for! I can see where this thing would be a real time saver on a lot of jobs and it looks like it works pretty slick too.
Thank you for caring enough to show people how to properly cut these kinds of threads. You have quality videos worth watching. I wish I could have used a geometric head when I was operating the lathe.
As someone who just bought an old geometric die head, thanks for being so thorough in this video! I had heard they were great for cutting NPT stuff if you don't have a taper attachment, but I hadn't yet done my homework when a nice one one popped up on eBay for a good price. This is just what I needed.
Always meticulous. And, at the same time, instructive, informative.
Thank you for this video Adam. I used to work with this Geometric self opening die head for 50 years ago. Sinds then i've never saw it again. Brings back good memories.
Thanks for you great video's and keep up the good work. Greetz from Belgium.
Thank you Adam for handing out so much free knowledge and experience. I have just started to get into the machining world, and you are one of the best instructors via video I have ever seen. Clear, concise, and professional. I am currently in a machine technology program, and what you show and demonstrate pushes me constantly to be a step ahead. You are capturing something special and (in my book) wonderful and precious by showing other people out there what is possible with some brain power and creativity. Keep creating brother!
This tool is for mass production.
I Always appreciate your videos, everything you ever show is very useful and come from a real production experience.
Thank you so much for the education.
Been watching your videos for years now. I just acquired a Coventry Die Head and didn't know how to use it, so I really appreciate being able to look back on this video.
Excellently done. Great tutorial. Everything explained without boring the viewer. Well done
Great Job. I used to work with all different sizes of die head even sharpen my old chasers and surface grinding a chip breaker. I roughly set it to the minor diameter of thread especially when your constant changing chasers, I close the Die Head and loosen adjustment screw, if I was cutting a 1/4-20 thread, I will insert a number 7 drill backward into the Die Head and slowly tighten on the drill and then lock the adjustment screws and pop the Die Head open to remove the drill. That was on my Screw Machine days 87-96, now I single point on a CNC Lathe, but crazy as it sounds, I still use the Die Head in a CNC Lathe for machining long 1/4/-20 threads. I wish I new how to single point on a manual lathe. We also used the same setup you just did in this video that's because like I said I never learned single pointing.. Great Video Abom79...
Very cool. A lot of people don't understand the issues reproducing something that was produced in a factory with huge production runs.This video is a good example. Good job in all your videos!
Excellent . . . again! I had never seen a geometric threading tool in action and take my hat off to the man or woman that invented it! Thanks for sharing this one. Very interesting.
I miss the days of working in a shop. Miss the smells, the cuts and scrapes.
Thanks for the videos
Used to use dieheads on automatic screw machines and Capstans , I remember the ones called Landmatic and Coventry were the style of yours and there were circular ones called Namco which were superior, also remember German Wagner ones. We always had to regain don specialised fixtures prior to using and the grind was different for each material. From UK.
Luv the little hacksaw. Used to have a bigger one in the electrical shop where I worked in the government rail workshop where I did my time (in the 70's, early 80's) - s'pose about a 20" blade by 1" and a bit high. Set her up and go and have a cup of coffee. clank clank, clank clank, clank clank. ahh yeh
Like the self release function on that tool, just luv that sort of thing. Gives me great enjoyment. I WANT ONE!!!
Thanks for the lesson. My South Bend Heavy 10 came with a geometric die head along with a bed turret. Now I can give it a try.
I used to thread a lot of small Stainless Steel rod with Geometric heads, Sizes . 3-48 thru 10-32. I always mounted the head on the carridge in a boring bar holder, centered it up and set the feed to match the tpi I was cutting. I worked like a champ.
I've never used it that way but would cool to try it.
Thanks for teaching us about machine tools.
Pretty cool Adam. I didn't initially see why something like this would be used but your demonstration really made sense. So rather than the normal fixed tolerances like H1, H2, H3 of fixed dies, this can be used to get what ever is needed to fit new or old threaded parts (worn, loose tolerance, or otherwise). Cool little device, thanks for taking the time to share!
Yes they are adjustable to make the fit you want. Once set your good to go on a production run.
Nice refresher for me Adam.
I got a couple of these from ebay not knowing anything about them, then couple weeks or so later got a job where I needed to do 1/20 threads on brass rods. After a few phone calls,got them dialed in just like you showed here. Thank for showing me I did everything correctly!
Razor!
I was in engineering in Scotland all my life, machining everything under the sun. I have used the Geometric Die Head but mostly we used Landus Die Head, both do a great job as do you. I love old tools too and some of the old way are best. You yanks have some great little fiddly devices that I've never seen before, thats one of the reasons I watch your videos.
Thanks for sharing. Very informative, as a weekend warrior, and a newbie to the world of metal lathe's. This (Geometric die head) has now jumped to the top of the list of gotta get one!!!!! Again Great video.
Wow what a nifty tool. I can see where that would be awesome for production. The guys at work have a laugh when I make jigs to build lots of the same thing but smarter beats harder any day in my book.
Hi Adam,
The common UK version is a Coventry die head. You can often pick up sets of chasers for very little money or free where one is chipped. Mounted in a handle, these are great for improving the finish of a just cut thread, or rescuing a damaged one. Some people like to make tool holders for them and use them just like a single point tool.
I once helped out when someone wanted a continuous 16 feet of threaded rod (in something like 7/16 UNF). I set up a die head in a boring bar holder so the rod could pass through and ran down the entire length, pausing every now and then to pull some more bar through the chuck.
If I remember, I'll show a 'poor man's die head' technique.
Sounds like a good idea for making all thread Paul. Good tip. I can see it working good in a tool holder.
Thanks Paul.
I always get a chuckle out of power hacksaws. There's something very Rube Goldberg about them that I find very amusing.
Adam great, you just took me back 48 years to when we had a couple of capstan lathes making lots of threads etc.The reason that the geometric die heads come with a parallel shank is that is how the capstan head turret was configured with a positive clamping arrangement, generally you had all sorts of other options including morse tapers that we used only for drills and reamers. Good clean threads, the chasers aren't cheap but last long time with good cutting fluid. Thanks for sharing. Bruce.
Great video! Really appreciate the information - hell, just knowing to look for “chasers” at MSC saved my butt. My folks pulled out our head the other day, and even after their 60 years of machining practice, they didn’t know how to set the thing up! Never stop learning!
I had a power hack saw just like that one....a great little machine but as you said, it great for cutting small diameter rods.
Hey Adam, thanks for sharing. I found some old chasers in the shed and had no idea how they are used. I was sure, that they were to thread something, but had no idea.
Great video.
Phil
Nice explanation on the geometric die head looks like a real time saver. It's all in the knowledge and tooling you make it look easy. I was wondering how sensitive it was to release the dies but you covered that at the end. Good job Adam.
Yes the head is pretty simple to release. I push the your hand will make it pop out as well. It's a nice tool to have around. Thanks bill.
It was really very cool and useful work that is used in higher production and a lot without much time has passed .
very good .
I hope he bought one
One of best machinist I have ever seen ,Keep up the great work
All your videos deserve to hit the like button MR Adam
Adam, I have really been enjoying your vids. I got the chance to use a chucker machine with geometric heads when I was an engineering student at CSUS, but I never learned how to set up the dies till now. What a great tool. thanks for sharing and keep up the great vids.
I need 4"ln 5/8bsw thred is possible ans me
Good job!!! Bring back memories of the machine shop I work at,where we threaded a whole 12 foot rode.
Never seen that tool before, sweet straightforward process. Thanks.
That is really cool. I have always called those die heads. I have also used a threading machine of which it's only function is threading bars. It was very rigid and it had all the standard die keys. It would flow cutting oil over the cut and re circulate the oil and had many sets of four die keys for each standard size.
I thread a lot of 7075 al rod for hobby use and have been doing it the hard way. I never seen this set up before and was inspired to buy one. I ordered the #4 to 9/16" this morning. Expensive but I think over a period of time that is a non issue. Collet set up is next on the list. As money allows that is.
Nice demo!!
Something else you can do is mount the die head in a boring bar holder in the
tool post and set the lathe up to single point the same pitch as the chasers, when
you disengage the half nut the die head trips open, very handy in a big lathe that
the tailstock is hard to move LOL!
If you have a tool post mount drill chuck, VERY HANDY, you can hold the stock in that and mount the die head in the headstock chuck and cut all thread as long as your lathe Z travel allows with ease!!
Single pointing long threads is a big PITA!
Follow rests are necessary at times but they are EVIL!
In a pinch a standard threading die can be chucked in the headstock and the stock
held in a tailstock chuck, this works better on long threads than a tailstock
die holder
Thanks Adam for sharing the great tool. I have a Geometric head about the same size. I have used it many times set up in my turret. These work great for any kind of production work if you don't have a CNC machine. I will have to make up an adapter for use in the tail stock then I would use it more often. Thanks again for the great video. Tom L. doesn't have one? No way.
Randy
Not long after I set up my own shop I had a job making 2000 old size head whitworth bolt (pre WW1). I bought one of these after the first 50 bolts!
another cool tool adam it takes the monotony out of a repetitive job great video
Never heard of a geometric head or seen threads cut with one... fascination tool and your close up footage was pro-action. The click at the end of the cuts were "money shots". Well done.
+Brent Metro Thanks Brent. Those tools are perfect for small threading jobs and production use.
Another good video of something I've never seen done before. Very educational.
Mark
Never seen one before in action, so that's how they work. Well thought out video, I like the mount set up well done. Rob
The one shop I worked in we had purpose rod threading lathe. The coolant system ran oil in it. It had a chuck that locked on both sides of the spindle and operated by lever. It had a quick chamfering tool. We had a cart for sorting out the various size rods. The rods were used for holding the end caps for pneumatic shock dampers that went onto rockcrushers that got damaged easily. It was cheaper and quicker just to build them brand new than try repairing them.
I love the Geometric so much faster than single pointing. Neat tip on using the saddle as a stop
After watching many you tube video's that made me nauseous, I wish to complement you on your videos. Your video's are all easy to watch, and very informative. Many videos on youtube are rank amateur attempts, with rapid panning, constant movement of the camera, and zooming at maximum camera speed. THANKS Adam for being a great video maker. Keith Rucker and Keith Fenner to name two more are also well done.
Thanks you John. I have a couple times used the head strap mount with my camera and be a bit shaky, but I so enjoy giving good angles and shots of the work I do. It's nice to hear positive feedback.
Thanks for taking the time to do these videos mate.. mechanical engineer myself, well used to be until the engineering all went frm uk to china!! Grrrr... but I stil dabble with my own projects, mainly car stuff, pistons ect..
Find in very interesting seeing the difference in tools frm the uk to us... keep em coming!!... all best..C
Adam,
I like the power hack saw. What a cut little guy and it seems like it is US made. A real tool!
The demo of the die head was excellent! I don't have one and I think I should look around for one.
Thanks Adam--I have never seen one of those tools before and they do a great job,so did you showing it..Really good communication..Thumbs up from a grateful fellar in oz
Hey, Adam.
Finally, a subject I know a little about. We have dedicated Landis cut threaders in our shop, Some will cut 6" - 4tpi. I think I have a threader like yours in the rack somewhere, I'll have to dig it out now.
Joe
Joe Hale we had Landis cutting heads back in the 80’s at GM Terex plant in Hudson Ohio. We made big earth moving equipment.
great video and cool tool. Thanks for sharing with us.
Adam, thanks for your videos. Its been a long time I'm not behind a lathe but definitely your videos have give me cool ideas to work with.
I seen a ton of these due heads, literally a ton at this old brown and sharp screw shop that's closing down here in Illinois. Nice to see it in action. Thanks
Thanks for showing that. I've used a die holder, with two 6" bars on it. Die holder has a 3" slip joint to keep the die straight, two bar holders are held with both hands.
Slow speed, release both hands at same time. Great way to break a wrist, or fingers, if I get distracted. :( After 200 of those threaded 14mm ends, really easy to get distracted.
Thank you Adam, first time I have seen a die head in action,, great video! Harvey
We had one of those power hacksaw's in shop class in high school. It looked exactly like that one you used except I believe it was a bit bigger. We cut thin steel bars, or whatever its classified as, for practicing our welding bead techniques
Last time I used geometric dies was on a screw making turret lathe. I'm thinking it was a Coventry lathe. Anyways 20 years ago. Great video.
That's a sweet little operation, thank you for sharing your knowledge with us. I just love how the die cutter pops open when it hits the stop you set, that's neat! Oddly I was just using a 7/16" X 14 Tap that my Dad had in his tool box to mess around with the mounting holes for my lathe stand. Another odd thing is that when I dug into my can of nuts and bolts, I found four bolts that are the same size thread and pitch...lucky day!
Sadly when I laid out my holes, one of them is off by a 1/4", so only three of them fit at any one time, hehe.
I'm not really myself at the moment and so it don't much matter anyway...my Mom's in the hospital and it's touch and go and I'm having a hard time focusing on anything.
Your videos are a big help, and like I told Tom, they really ease my mind while I'm stressing out. I know you can relate, as I can tell how much your Mom means to you too, so thank you very much for helping to keep me from going bananas.
Aloha, Chuck.
Started watching this while eating lunch then found one by accident on Craigslist. Hadn’t ever seen one before then twice in one day.
HI Adam,
Nice video showing how your geometric head works. There have been a lot of times I wish I had one! Thanks for sharing.
Take Care,
Reid
Hey Adam, I have seen those chasers on ebay and wondered how they work. That is the way to go if you have alot of them to do. It's a good day when you learn something new. Thanks,
Buddy
Great style and very informative. Thanks for your time and effort in producing this.
when i was taught many moons ago we set the die head with new bolt and and set it with the lever toward you until get it to size then when start your first part flip the lever to the back make first pass leaving stock for a finish pass then flip the lever to the front for the last pass to make it pretty without rough flanks
HI Adam,
Wow, for the little saw, Keith could be on the lookout to find you a mini steam engine, it would put you in the mind of the locomotive driver.
The geometric is a great tool, it's so easy to use once set, hard to be faster without using an automatic machine.
Nice of you giving many different viewing angles.
Thanks for showing,
Pierre
Adam
Thanks for the information and use of this tool. I always thought that the tool was pricey unless you had a number of threads to cut as you did in your job. I see how valuable it can be, but due to the cost I think I will stay with using threading dies.
Keep up the great videos.
John
Adam, thanks for showing the geometric...another new tool to add to the knowledge base. Looks a little bit like a pipe threading die with the separate cutter parts. I can see why that would be preferred for production work. Besides the thread depth adjustability, the way it pops open when done saves having to spin it backwards to clear the work like you'd have to do with a round or hex die. Time is money.
-- Mike
Hey Adam that's an awesome lathe attachment for threading !! Throw some Abom at it ( LOL ) and build a few of those for sale , deeper throat , & larger thread dia .
Very interesting Adam and well worth watching. Thank you and i hope your feet get to feeling better.
Thanks Randall.
You are very meticulous about your work, that's a very good quality. Good job.
Tanks for the video Adam. Nice and handy tool, but it should have some kind of drip oiler on it. That would make it even more automatic.
Cool tool thanks
First time for me. I enjoy watching the video. Thank You.
Thanks for the video ..That would be a great tool to use when making U bolts for truck rearends
Thanks for the video as I have never seen the heads in action. I have probably sharpened hundreds of the chasers.
There not difficult to sharpen if you push them to dull . Push them too far and you start to damage the thread on the chaser . Another brand of chaser is Landis . I have sharpened them too but not nearly as many. You also need a special holder for the Landis .
You got all the toys Adam.
Great Job.
Once again...Sweet work...I always pick up something new...thanks...!
Adam, you make life difficult.
1,to adjust the die head once easy:-close the head to finish cut size then screw into the chasers a screw of the finished size. Then adjust the chasers until the screw is gripped.
Finished size one go.
The large adjustment lever is very useful for longer threads to reduce torquing the rod using 2 cuts.
Cutting thread over a hole is risky.
Drill the hole after using a nut drilled in the right place. No burrs and accurate drilling.
Adam, I just had a job come in with lots of threads so I have dusted the cobwebs off my 1" Japanese made Die Head and will now make an adaptor for the current lathe, I have ordered a set of chasers for 1/2" pipe thread, it won't take me long to get into the swing of it again. In the past we used to refer to them as "Coventry" dies and chasers, as most of those found in Australia were for Alfred Herbert and other brands of capstan lathes that were imported from the UK in the old days.
+Bruce Whitham , Same , we always referred to them as the Coventry Die Head.
Great video Adam. Love the hacksaw
We used the English Coventry die heads on Ward capstan lathes to make medical equipment, they were a very efficient way to crank out short to medium parts runs,and if they don't make the threading chasers then you don't need it.
If you wash those batteries down with a few boxes of baking soda and hot water, maybe the acid won't attack and rot the steel as much.
Thanks for the saw video, I need to build one.
What would be nice, is that you could insert through the morse taper (make a hole through it) a say 3/16 bar inside the shank of the geometric and use that as a stop. The 3/16 bar would have a stop screw in the thickest part of the morse taper to adjust for different thread lengths. In that way the bar being threaded would reach the desired depth, hitting the 3/16 bar and then stop threading. In that way you only need to put the bar being threaded in the chuck and regardless of its position with respect to the chuck you would get always the same length thread. Faster and less error prone unless to much chips accumulate inside of the geometric an alter the stop distance. You would eventually require a couple 3/16 stop bars of different lengths to accomodate all thread lengts.
Hi
Adam
That is a very "cool" power saw
Good power screw cutting head
We have a similar version in the UK
Coventry die head
Thanks John.
P
Great Videos! A true Machinist.
Very informative, I never used it before.
Thanks
The Old Bob
What are you thinking.
Your Geometric die head.?
2 cuts for the job.
Advance the dies to the maximum closed setting. Screw the standard screw into the head to adjust to the finished size. Remove the screw. Open the head to the rough cut size. Second cut finishes the job. No trial and error. 1 adjustment. FINISHED.
Great show and tutorial.
Thank you! Now I know what the heck that thing is that came with my lathe. Although it didn't come with the bits, I can get it set-up to working order. I've been watching several of your videos and enjoyed every one.... GOOD JOB!
rtkville
Thanks Adam. That's answered a lot of my questions. Cheers
im not even a machinist but I love ur channel I watch hours a day
It sounds like it has a loose bushing. Great little saw
good video adam. learn so much from your channel