Making Big Bolts - Threading 3" Bars for Rock Crusher Bolts - Manual Machine Shop

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Big jobs are what I like doing best. The bigger the part, the more I enjoy it. So, this job was something I really wanted to take on. This is from a new customer, and a while back I did some long threading of 2" bar stock for them as the test. Now, the big job of 3" bar stock came in for threading.
The first part was started by another shop and they couldn't quite do the job. Since they had started the thread, I had to locate and start cutting where they left off. This is something I have done for many years with great success. I hope you can learn from this process, I know it is difficult to see. That is the sucky part of doing these videos by myself, I can never get the camera where I want it.
The other end went well, and gave me a reference point to thread to. After that, the rest of them went quite well. Big threading takes a lot of horsepower, skill, and patience. I make it look easy, but it really isn't as easy as you may think. Years of experience and the proper equipment definitely help.
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Опубликовано:

17 фев 2023

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Комментарии : 232

@petek210 Год назад

A machine shop channel doing actual machining instead of shilling for 40 minutes. What a novelty!

@bostedtap8399 Год назад

So many variables in screw cutting threads, digging deep into the nomenclature for fits, and guages is mind boggling. Many years ago, I came to screw a female rod end on a large hydraulic cylinder, circa 75mm, it was a very loose fit, totally unacceptable, the rod end was made in house, it had passed inspection, but the issue was the machine shop had made the male thread gauge, had it measured over wires etc, all okay, but they had missed that the point of the threading tool had broken off, so the root was way oversize, and consequently, all machined internal threads using this gauge were scrap. I think there were several rod ends made using this so called guage!, all built and shipped, expensive rectification, required send guys and new parts in Europe from the UK. Proper sized threads Josh, warming the shop up a little. Thanks for sharing. Regards John

@TopperMachineLLC Год назад

It's amazing the variables in threads and it gets worse when they come from China.

@bostedtap8399 Год назад

@@TopperMachineLLC. I always remember the Groucho Marx quote, "Those are my principles, if you don't like them...Well, I have others", works better changing to standards. Brilliant quotations yhim.

@alex4alexn Год назад

i remember when you had like 1000 subs, now you have enough to fill a football stadium, thanks for the content and keep up the great work and videos

@TopperMachineLLC Год назад

Surprisingly it wasn't that long ago. Thanks for sticking with me.

@grzywka7307 Месяц назад

Josh. I really love your no bullshit videos. Keep up the awesome work.

@TopperMachineLLC Месяц назад

thanks

@rdc008 Год назад

Nice to see a guy take up where other's left off !

@PorchPotatoMike Год назад

I like big bolts, and I cannot lie!

@The_DuMont_Network Год назад

There's just something so satisfying about seeing a machine tool whittling away. I always enjoyed working manually operated tools rather than CNC. Not unlike the difference in the Full Self Driving farce vs driving oneself. I much prefer operating my own machinery and getting the enjoyment therefrom.

@ElmerJFudd-oi9kj Год назад

Hi Josh, first of all I complement you on the cleanliness of this part of your shop, well done. This job is as impressive as can be, the heavy turning, the effort and the amount of pieces makes some serious machining. well done sir! Nice camera placings good lighting and sound, and excellent editing. Chris.👍

@TopperMachineLLC Год назад

The entire shop has been going through a thorough cleaning and organizing the last few months. Many upgrades coming as well.

@bcbloc02 Год назад

My personal experience on big threads is that if you start with the OD being the max thread diameter then turn till you first get a sharp top then knock the top off with a file or a light turn pass I usually get a good fit. It seems most materials usually wind up turning up or reforming a bit of a top burr when threading so knocking that off is a lot of times necessary to get a good fit as it isn't the side to side where it is tight its on top/in the root. Most threads are cut 80% or less anyway so the top normally is supposed to come off some. Just a quick way to get real close by eye that works for me. Looks like you got them fitting good!

@TopperMachineLLC Год назад

That's what I've seen too on some of these large ones.

@Watchyn_Yarwood Год назад

@@TopperMachineLLC Store the nut on the tailstock quill as you are checking fitment. You don't have to keep backing off the tailstock every time you want to check it.

@Watchyn_Yarwood Год назад

p.s. Excellent work, great videography and nice clean shop!

@mattdixon8750 Год назад

I was kinda thinking the same thing in the beginning. Making sure you start with the correct O.D. on the shaft before you start threading. I'm sure it would be difficult to determine that from the nut somehow. Either way it worked out here and good job. Like both your guys videos learn a lot thanks!

@sjv6598 Год назад

@@Watchyn_Yarwood 16:56 it’d get in the way of the cross slide.

@ShredPile Год назад

I thought for sure the story was going to end with the nut being an M75-6 or something like that but you got it fitting so nice there was just no question. Thanks for all the great content, It's a pleasure to watch and listen to.

@37yearsofanythingisenough39 Год назад

I no longer use the compound for single point threading, just the cross slide. In using the compound you end up with a ragged right hand side of the thread (as viewed in an optical comparator) and use the cross slide to clean that up in the spring pass(es) anyway. The threads come out gage perfect as well as fitting the matching female thread. I still take a file to the crest of the threads to remove any raised burr.

@TopperMachineLLC Год назад

I use a combination of the two on these big threads. It gives me a better finish and longer tool life.

@sawz5 Год назад

I find that on big threads like a "4" there is so much tool pressure using the cross feed only that the tool breaks more often.

@samrodian919 2 месяца назад

That's ok as long as your machine has the horsepower to cut the thread on both sides of the tool. In large threads that equates to an enormous amount of material being removed at each pass, and as you get deeper the more material you take out as the vee gets wider. I bet if it was calculated a compound only cut will use4 0-50% less horsepower needed to cut the thread. Ok for industry, but these days there are not so many old machines capable of producing big threads out there. I bet that was the problem with the previous shop that tried to cut the original thread, and they ran out of horsepower to finish the job. If they couldn't do one end, then they had no chance of doing the rest.

@chrisstephens6673 Год назад

Gotta love big threads, the last time I did on that big was a drain plug for a 50's Jaguar petrol tank. Made it to spec and guess what, I had to "refine" it to make it fit but no tank to test it to. The phase " hit and hope " comes to mind.

@drevil4454 Год назад

These repetitive jobs will make any person go nuts.

@TopperMachineLLC Год назад

Yes they do, but they also pay good.

@daleolson3506 Год назад

Pun intended

@BeMindfulkthxbai Год назад

I saw what you did there. 👍🏼

@TopperMachineLLC Год назад

But they only gave me one nut. I prefer having 2. Lol

@bazookamoose7224 Год назад

No guarantee that the nuts they have are of the same fit grade if they are getting cheap mass cast. There still is potential that they might need the nuts touched up to fit the bolts. I’m glad at the end you were a bit worried about the depth of that thread, at the college I always grit my teeth when some of the depths start gripping a bit too much. Always makes me want to change the lead to 59 or even 58. My teeth gritted hard when I heard the bar and bit groan on that last thread. Are you using carbide or ground HSS or Cobalt? I’ve found on the manuals a jig grind on cobalt lasts longer and doesn’t break as bad, but I really like carbide two sided multi thread single point for semi-CNC work with a tool room lathe. I always end up going about .005” undersize for Max Major before cut, seems to reduce issues in bigger threads, but you might get some one barking about tolerance and fit grade >.>

@johnrice6793 Год назад

You have sir a very nice shop. Not only that you are quite adept. Hood on yuh!👊

@mfc4591 Год назад

Great to see what you are up to this week. Those are sure big nuts, I don't remember tightening anything that large very often !

@hasletjoe5984 Год назад

I recommend stepping up to at least a 3/8" drive set....😄

@AmateurRedneckWorkshop Год назад

Enjoyed the video. Keep on keeping on.

@OFW Год назад

Great work! Your videos are getting better every time I watch them.

@alanm3438 Год назад

I am not a machinist. I think it is so cool that you were able to fix a mistake made by someone else. I am sure that you saved the customer a lot of money because they did not have to buy another piece of steel. I thought that threads were a one pass deal. I did not know that they could be done in multiple passes. You did a great job on the video and solving a big problem for your customer. I think it is incredible that you took on the job because you knew that large nut thread could be problematic. God sure has gifted you with a lot skill.

@ellieprice363 Год назад

Smaller threads are often cut in one pass with special die heads and plenty of lubricant. Threads this size, unless in very high production, are usually machined in multiple passes and fitted to matching nuts.

@eaglebill3738 Год назад

Thanks Josh, another great video of quality craftsmanship! Keep them coming,

@10-4CodyWade Год назад

Pretty cool seeing those big threads cut. I always record my measurements after getting a successful thread so its much faster the next time. After you made the first thread work so nicely you should just note the measurements on your digital and compound. Also that looks like a really nice lathe...so smooth.

@dermotkelly2971 Год назад

I remember making one of those just like that . Another day another dollar.

@HawksDiesel 3 месяца назад

Great stuff! Keep it up!

@tpkirkp Год назад

Hey Josh, The video and audio quality has increased 100% lately. Great! Love your videos, even tho I'm not a machinist, I learn a lot watching these vids. Cheers.

@TopperMachineLLC Год назад

It has been quite a major problem figuring out the audio stuff. Basically I can't have the software updates for the GoPro. Someday I'll get better quality cameras, as these GoPro's are cheap junk.

@BrucePierson Год назад

@@TopperMachineLLC Remember that the higher the quality of the video, the larger the file and the longer it takes to upload. The existing quality is acceptable and in any case, I am restricted to 720P with our slow internet!

@randyjones9188 Год назад

Josh, as a constructive suggestion, slip the nut over the head of the live center. Saves time and moving the tailstock each time. I've done it many times

@TopperMachineLLC Год назад

I would have if it fit.

@deltamachine2059 Год назад

We just did a job with 1 3/4" studs and nuts. Had to run a tap down every nut to get them to work

@TopperMachineLLC Год назад

Glad to hear how common it is. Not happy that it is a problem.

@jamesriordan3494 Год назад

Great content and production quality. Shop is looking tight 👍🏻

@accuracymark Год назад

I like to use a cutting oil on my threads, I find it makes a better finish and better tool life.

@TheUncleRuckus Год назад

Great video as always Josh, thank you for uploading! 👍👍

@gar50172 Год назад

Thank you for all of the education. Hope to be as good as you one day

@tiredoldmechanic1791 Год назад

The 4 inch rods used to hold the wear liners in the Texas Shredder were 4 inch with a 4 TPI thread. They tended to break in the thread. When they broke, the liner they went through would have to be replaced because they would be bent enough so the rod couldn't be replaced without replacing the liner. It was also difficult to get the 4 TPI nuts tight, even using a hydraulic wrench. The 4 TPI threads reduce the minor diameter 3/4 of an inch. We started having our own rods built with Standard 8 -UN TPI. They didn't break and were much easier to get tightened. They are also much easier for a machine shop to thread and the liners could be used for a much longer time.

@37yearsofanythingisenough39 Год назад

I would offer that your experience mentioned relates directly to a finer thread having more holding power.👍

@bobbyvance6622 Год назад

On a large thread turn the O.D. down about .010 and then thread makes fitting easier.

@ypaulbrown Год назад

wonderful video Josh,,,,,,,your friend in Central Florida, Paul

@ypaulbrown Год назад

lovely video, cheers from down in Florida, Paul

@yordidelacroix Год назад

As a conventional machinist, i really enjoy your video's and even learning something watching them. Keep it up!

@stacy6014 Год назад

A machinist on another forum that does work on big boat parts said that they make those large nuts because the quality is so bad. I think he said 2" and larger. Probably have to justify the costs for the customer to eliminate any rework of out of tolerance parts. Keep the "real" machining videos coming Josh. Joe

@Realtime1501 Год назад

We actually have big taps on hand to run through nuts just to make sure

@ValiRossi Год назад

Wow, 14 of them. That is a lot of work. I used to build turnkey rock crushing plants many years ago. Heavy stuff. Good job!

@hacc220able Год назад

Very good job and thanks for sharing.

@ponga782 Год назад

Great video! I love single point threading.. it's very satisfying...

@jayreiter268 Год назад

Josh I just had a epiphany. Never thought of the origin of "chasing a thread". I just used a tap, die or thread file as needed. But I see that is what you do on a lathe to "catch the original thread".

@jimpritz4169 Год назад

Shop is looking great JT. Why would anyone in your area try to get something machined correctly anywhere but Topper Machine. Shame on them. Just bring the job to you in the first place and know it's going to be done right. Good work Josh. Thanks for the video.

@TopperMachineLLC Год назад

Thanks. We spent a lot of time cleaning and organizing. More to do, but it feels good.

@allenhunt3070 Год назад

Nice work.

@alanpecherer5705 9 месяцев назад

In one sense you are lucky that you have some klutzy machine shops in your area that in essence "refer" customers to you. I'd imagine as a machinist you could go through a lot of years without threading any 4" bolts and thus would not have that wisdom coming from experience that bolts and nuts of that size are not always dead-on to spec from the book. Nice video, Josh!

@camojoe83 3 месяца назад

Missed opportunity for a Big Johnson race team tshirt in the back of this shot, lol!

@kimber1958 Год назад

NICELY DONE

@kentuckytrapper780 Год назад

I take it those bolts were not for a wristwatch, lol. Great video Josh, keep'um coming..

@robertpeters9438 5 месяцев назад

Or, the giants of old are back!

@balesmachine Месяц назад

Addendum to my previous post - Or I guess you could test fit all the nuts, and once you find the smallest nut, you could use that nut as a thread gauge.

@kamper4140 Год назад

Those big course nuts are always all over the place in size. I'm surprised they only gave you one for fit up lol!

@donteeple6124 Год назад

Josh, That job would have been a PIA without that LION lathe....was hearing the whoomp whoomp bogging also.......excellent job matching what cobbed up thread job they 1st put on that shaft, sorta looked like they might have even tried to cut with an ACME cutter not the 60 standard.....at least the shaft wasnt some hard alloy and complicate the job...seemed like 1018. to me.....as always you did a great job not only w the machining but the presention/teaching and the production of the vid......keep up the good work !!!!!!!! Crazy crazy winter for sure......lol Don

@teaches2010 3 месяца назад

As a gravel train driver in Michigan, i can say rock crushers take a beating ❤😊

@AaronEngineering Год назад

G’day Josh. Good work on those big threads mate. You must be loving that new lathe of yours. Cheers 🍻 Aaron

@theessexhunter1305 Год назад

Nice work, in the toolroom and different workshops over the years we never used the compound. only had it at an angle for clearance reasons some times. We did work for Marconi avionics EEV Lucas CAV fuel injection in the UK. It is not done on internal threading with the compound half way just the cross slide as you will end up in a right mess.

@justtim9767 Год назад

Nice.

@HoundDogMech Год назад

back in the late 70'sI was working for a guy in a 2 mn shop as a Tool and Die Maker. had to Drill a number of 1&3/8" Flat bottom Spring pockets. We did not have a Drill and my boss sent me next door to borrow one from these guys running a 2 man Turning operation. Well I walk up behind the one guy to ask about the drill. As I approached him I started to ash then see he's Threading a Lrge NU like You had there. I backed off. He looked at me over his Right Shoulder and asked You here for that 1&3/8 Drill. I just backed up and apologized for the interruption. While Cutting the Tread (With out missing a CUT he reached down grabbed the Drill handed it to me and Kept rights on cutting the Thread Just admired his skill.

@glennschemitsch8341 Год назад

Don't use the compound slide anymore either. NOW.....If you turn your tool bit over, run the spindle in reverse, You can start near the headstock and feed left to the tailstock. simple old toolroom trick. cleaner looking job. try it, you'll like it!

@johnrice6793 Год назад

I meant, good on yuh!

@sawz5 Год назад

just yesterday I had to repair a hydraulic cylinder rod. the threads galled when I removed the nut so I cut down 1 3/4" to 1 1/2-12. the new nut would barely start so I kept making passes and when I got even deeper than I thought I should be I went and got a different nut and it spun right on. A little more loose fit than I would like but at least I didn't ruin the shaft. I checked the other nut that was in the same package same thing, wouldn't fit. I don't know why but we are going to give them back to the supplier and let them find out why they don't fit.

@kimazbell460 Год назад

If there is such inconsistency in those large nuts, how do you know the "test" nut is representative of the whole lot? All my threading is on a much smaller scale and I've just never thought about that kind of variability.

@TopperMachineLLC Год назад

The customer understands the risk and said they would pay for any recuts.

@67cudaksa34 Год назад

maybe the cure for the nuts id have machine shops like your to produce them

@TopperMachineLLC Год назад

Cost. That is the only reason they buy Chinese junk.

@felixthecleaner8843 Год назад

some great machining there and particularly liked the explanations. New Sub!

@mackdog3270 Год назад

LoL the machining side of my shop is still pretty new, I'd settle for getting it done any which way 😁

@Burkis91 Год назад

Was the nut too small to fit over the live center so you didn't have to move the tail stock every time?

@TopperMachineLLC Год назад

In this case, yes. It wouldn't fit over my live center.

@rogerrowsell5926 2 месяца назад

Remember my employer ordering over cut nuts to fit over size threads on large threaded rods, already installed.

@edbarsh4370 Год назад

Nice work you are good at what you do 👍

@willydoitbettydont9100 Год назад

Looks like you got those whipped and the Lion can eat. Be glad they were RH threads on both ends. Is that Lion lathe a gap bed?

@TopperMachineLLC Год назад

I don't do a ton of left hand threads, but they really are no problem. Actually kind of fun. It is a gap bed.

@johncollins2037 Год назад

A 3" bar needs to machined to size, before, a thread can be single point cut with the inserts that you are using, applies to any thread. Try full full form inserts.

@GardenTractorBoy Год назад

Those big threads and nut are cool. I don't think we even have a tool that would fit that nut

@clutch5sp989 Год назад

Great shtuff.....Please don't change a thing in the way you make these vids. Soo many times we see the person get a big head and steer the attention to be all about them & NOT the content. Then others who think all the fancy camera shtuff is better.

@ferd.6779 Год назад

Wow that was a bit of 'massive' Are You sure about the internal threaded nut? Like these videos ;-))

@TopperMachineLLC Год назад

Anything over 1-1/2" has been a crap shoot the last several years.

@quantumleap359 Год назад

Very nice work, having the tools is one thing, knowing how to use them correctly is what separates the pros from the wannabees. Thanks for the great video.

@d6joe Год назад

It makes a guy wonder if the customer gets another/new batch of nuts, will they fit the same on the shafts you threaded? Or will each new parts batch of nut need custom threaded shafts. Or is it as bad as every nut need to be custom fit?

@TopperMachineLLC Год назад

The consistency of nuts over 1-1/2" has been terrible. The customer supplied the test nut and they were all checked to that nut. They already suggested paying for any rework due to nut inconsistency. I always bring these issues up when doing bigger stuff.

@d6joe Год назад

@@TopperMachineLLCsounds like they might have to buy a big tap to chase their nuts into consistency?

@TopperMachineLLC Год назад

@@d6joe was suggested.

@funone8716 Год назад

Nice lathe! I'd like to have one. Because I get bit from time to time, I'd be screwing that nut all the way on and off each thread just because.

@jamesdavis8021 Год назад

Nice job. I wonder if you have the clearance on the tailstock center,to allow you to put the nut on the tailstock or center so,you don’t have to move the tailstock back each time,to check the fit.

@TopperMachineLLC Год назад

I don't. My center is too big.

@paulalmquist5683 Год назад

You commented on the quality of the nuts relative to their source. I wonder how consistent the threads are from nut to nut. Will they all fit the threads you are cutting? That is something the customer will find out. Interesting video. I have about 2 weeks of machine shop experience from a class 50+ years ago. It is still fun to watch. Thanks for a good video.

@scott5931 Год назад

Another silly comment, Enlarge your shop sticker on the safety shield and move it close to the edge to get it completely into the video

@dale5898 Год назад

I had no idea you were a watch maker as well.

@frankyw8803 Год назад

Surely you were dialed in on the first , why not thread to that spec ?

@michaelgaffney5643 Год назад

Just wondering if the material diameter is consistent enough to just cut the same depth on each one?

@dennis-nz5im Год назад

If the nut is not correct, why not increase the nuts threads to fit a properly machined shaft ? That will make stronger parts.

@RCRadioShow Год назад

Josh, I have seen you do a number of videos on cutting threads on a lathe. This was probably the best. I have always wondered how you get the cut to start at the same angle on the piece as it is rotating around? The tool obviously has to end up following the thread you cut before.

@TopperMachineLLC Год назад

One of my earlier videos show how I engage the feed nut to get the same starting point.

@RCRadioShow Год назад

@@TopperMachineLLC I have it now. The thread dial runs off the lead screw so if you engage on the same number every time it puts the tip of the cutter in the bottom of the vee of the thread. Does the Lion lathe engage the cutter automatically or is it still manual?

@TopperMachineLLC Год назад

@@RCRadioShow Still all manual. I hate automatic anything. Can't trust them.

@BrucePierson Год назад

@@TopperMachineLLC All our cars have a manual transmission!

@RCRadioShow Год назад

@@TopperMachineLLC I suppose it depends on the spindle speed and the pitch of the thread. I can see where you would prefer manual control over engaging the cutting tool.

@therealme613 Год назад

Joe pie raised a great point ……… why does everyone thread towards the headstock?? Couldn’t you flip that tool upside down and cut even this big thread in reverse?? What was that for BTW? Great job! ✌️💖&💡

@GordonTurnerr Год назад

I had to think about this for a while but I think I figured it out. Depending on the ways of the lathe, you can't pull up on the tool post, only push down! Someone let me know if I'm wrong tho!

@RichardKinch Год назад

@@GordonTurnerr You can thread away from tailstock using left-hand toolholders on the back of the work, with reversed spindle rotation. This pushes down on the carriage like with right hand-turning.

@GordonTurnerr Год назад

@@RichardKinch makes sense!

@scott5931 Год назад

Great video as always Just curious, the magnetic light seems to have a very yellow hue, maybe swap out for more of a bright white light to improve video quality? Thanks for posting these videos

@TopperMachineLLC Год назад

I've been meaning to finding a different bulb for it because it is quite overpowering. Someday, when there is some free time.

@marklowe330 Год назад

Did you measure it to see how undersized it may be? There is no gage better than the nut going on it. I spent 30 years as a machinist. 20 of if programing large cnc lathes.

@tomfrederick6083 Год назад

I find the process of cutting threads on a lathe to be fascinating. I am guessing the machine's computer knows how to match rotational speed to the feed rate of the tool. What really stumps me is how it knows exactly where to begin cutting on each subsequent pass. If the cutter isn't lined up with the thread starting point, it's going to tear up the previous cuts. So how does it know? And how did you do it prior to digital measurement?

@billshiff2060 Год назад

Nothing digital about it Back when or now. The driving lead screw has a worm gear running on it with a pointer showing its relative position. Look up thread chasing dial for more info on how it works.

@vdsgw52 Месяц назад

Josh what cutting insert and holder are you cutting thread with??

@jimsvideos7201 Год назад

Is your live center binding some, or just not tight into the part? It looked like it was slipping on the second end.

@balesmachine Месяц назад

I have a question. You made the first shaft fit the nut you had in your hand. How do you know that that shaft will fit the particular nut the customer chooses mate with the shaft. If the problem is the thread tolerance of the nuts varies, then you will need to either make sure all the nuts fit all the shafts, or match them individually. This is the whole reason for internal and external thread tolerances. Just curious which method you plan on using.

@TopperMachineLLC Месяц назад

The customer supplied the nut used. They told me to make them all fit that one. They know the variance in the nuts they purchased, and are OK with it as these are a single use part.

@earlmiller6093 Год назад

Repeat jobs are prison

@r.d.boschung8374 Год назад

If the nuts are not all cut to size by the book, don't you have to match each nut to it's rod?

@TopperMachineLLC Год назад

Pretty much. There is some risk in the way we did it, but that was the costumers request.

@bobbyvance6622 Год назад

You could have used wires after the first couple to get a base dimension.

@TopperMachineLLC Год назад

Once I got the first one done, I had my base line and just went to that each time. Then fine tune to finish.

@nsopceo Год назад

How are you hitting the tread exit in exactly the same spot every time? No thread relief? Love your videos!

@TopperMachineLLC Год назад

Years of practice. The part would be weakened with a thread relief.

@gentharris Год назад

Step 1, take at least .01 inch off the OD on a thread that size. Step 2, grind a flat .125 of the pitch on the tip of the tool by the book Step 3, set the compound angle to 29.5 degrees Step 4, set the cross feed handle to a convenient position for rapid retract, this WILL not change zero DRO or dial on cross slide Step 5, touch off with the compound slide and zero that dial. Step 6, take a test pass to ensure pitch is set correctly. Step 7, on your thread " fish" gauge it lists the "double depth of thread" for each pitch, divide that by 2 then divide the result by .783... this is the distance to advance the compound slide. Only advance the compound for each pass. This will get you very close on the first try! I have cut internal threads with no way test fit with this method.. PS on large coarse pitch bolts like this, don't shoot for a zero slop thread, you might have the loosest nut in the batch and the guys assembling this big heavy shit will hate you. Love your channel just trying to help...

@TopperMachineLLC Год назад

For the most part, this is exactly what I do. Once I had the first one cut, every one after was exactly the same depths. Except when I broke an insert and had to re-zero, as the inserts I use done sit in the exact same spot when you break one and flip it. Great pointers, and definitely will be retained for future work. Thank you,

@BrucePierson Год назад

That must have been tricky, chasing that existing thread to cut it correctly without destroying it.

@TopperMachineLLC Год назад

Not at all. I do this kind of stuff all the time.

@Sillyturner Год назад

Right on.

@frankish5314 Год назад

Another video where I realise "I need a bigger lathe"...:)

@MWL4466 Год назад

Nice job sir ! I do the same thing with big threading jobs like this, i rough them out with a 30 degree turning tool, CNMT i believe the insert is. It takes a lot more abuse then my threading tool. Quick question, how has that lathe been for you ? It looks like a nice smooth, solid machine.

@TopperMachineLLC Год назад

That is a great suggestion. I actually considered it. The Lion has been one of my best business decisions. Definitely a great machine.

@Realtime1501 Год назад

We use Dnmg inserts

@basbh1782 Год назад

Great suggestion X2 goes to show a old dog can always learn a new trick Was told as an a apprentice the day you think you know everything is the day you should quit being a Machinist because you're ego has surpassed your skill or Brain or something along that line. I wish I could remember all of the old one liners i was told. But that was 30 years ago

@TopperMachineLLC Год назад

@@basbh1782 ego has ruined many great people and almost all of the younger generations. I'll be the first to admit I don't know anything, and am always trying to learn more.

@DontCallMeGarage Год назад

does the nut fit over your live center? if so you can leave it over the center whilst thread cutting so you dont have to pull the tail stock everytime you check the threads

@TopperMachineLLC Год назад

No, It does not.

@DontCallMeGarage Год назад

@@TopperMachineLLC looked close, hard to tell on the youtubes! saw Cutting egde engineering do it with gland nuts for hydraulic shafts, it was one of those "oh duh" moments

@TopperMachineLLC Год назад

@@DontCallMeGarage It was close, probably 0.010" I have done it a million times with other jobs that do fit.

@robertpeters9438 5 месяцев назад

Maybe your customer should order hex stock and have you make their nuts so they are interchangeable!

@TheTsunamijuan Год назад

So I am wondering about thread and material strength here. I am going to make a few assumptions here, as a starting point. Those being That this is likely for a train or some other big heavy, and old piece of industrial equipment. So the questions is this, Do you think the material quality these days is better than say 60 years ago? (admittedly this could be a tough one, as we built some amazingly high quality metals for ww2 battle ships and the space programs) With the quality of the material possibly being better, does that make up for this being a cut thread vs a rolled thread? With both of those being considered. Does the newly manufactured fastener end up strong, weaker or equivalent to the original? What are peoples thoughts on this?

@billshiff2060 Год назад

In the last 60 years there has been no significant change to mild steel. This one here is thought to be 1018 or 1045= Low to mid carbon steel. It's the same stuff as 60-70 years ago. Yes there are other alloys available but this is not one of them. Generally if you increase the tensile strength of the material, the fastener strength increases about the same percentage. Rolled threads do increase the tensile strength of screws but the main benefit is the increase in fatigue strength/life. Fatigue is the #1 enemy and it attacks at the surface of the root. That is why UNJ threads are used in critical applications.

@TheTsunamijuan Год назад

@@billshiff2060 thanks for the info, i appreciate it

@shinymud7 Год назад

Is it considered a cut or a scrape? Ty

@T-rock_chr0n1c Год назад

Maybe a dumb ? But do u have to support the work piece that sticks out of the backside other lathe .. like I saw u pull the thread piece threw the back hole and turn it around I didn't notice anything...

@TopperMachineLLC Год назад

Depends on how much I stick out. Sometimes yes, and I have bushings for the spindle hole for support. Generally if it is inside the spindle tube I don't support it. If it's a few inches out the back then I do.