SERIES LINKS: PART 2: kzfaq.info/get/bejne/ocVlea9_q5-uiX0.html PART 3: kzfaq.info/get/bejne/gpiYmtigs8C5oas.html

This is a brilliant video that many people starting off to operating a lathe should definitively watch !! To appreciate and show the machine with the upmost respect, or else….. I know I didn’t , and that swarf is what brought on my redemption

Love your videos. I am always learning something new. Thanks for sharing. Very informative and a great teacher.

Enjoyed man on to part 2 ..

I have a pair of long-nose Needle Nose Pliers I use constantly to pull strings off the machine and toss them away from the chuck.

At 12 minutes.... doesn't happen turning away from the chuck. Also you wouldn't have to stop the feed and finish by hand. Hey Richard try it one time...... It has many advantages I don't understand why everyone's not doing it. 🤔

A Rush Job ? Well Here's Another Fine Mess You've Gotten Us Into !!! I'm Right There With You Man !!! I'm In The Front Row Of The Cheering Section......Go Rich Go Rich

Dangerous job. Cheers Peter

It is always good to be wise after the event - like you, I just wish I could foresee these problems before, Good Luck with it all

THE JOB THAT FIGHTS BACK! >=o

I have used a 4140 annealed (not the Half Temper/Heat Treated/High Tensile you are using) a few times and find that it really seems to want high speeds and feeds. I have had decent luck with 1100 rpm and 0.014"/rev. However, I am novice so take my recommendations with a grain of salt. I really like the explanation of your thought processes and that you even show mistakes. Very nice.

Thank you for sharing, and helping us learning!!!. I think that many of your subscribers have commented comprehensively. I think the major problems are possibly lack of lathe power ( your lathe was probably designed to use HSS tools only), and the inserts you are using are positive rake, without chip breaker features. These type are ideal for older/less powerful machines, negative rake require more power, but generate shorter chips. Again it is always easy to comment from an armchair etc. Hope you get more contracts.

Those chips would make pretty pattern steel knife blades. Look like you need a good face shield while working lol

Is taking a deeper cut then .010" maxing out your lathe? Need to activate that chip breaker. Good luck and watch out for those flying chips!! Lol

Get yourself the longest pair of needle nose pliers you can find, to pull the stringy chips out and pull the chips out at the end of each cut. CrMo likes as much speed as you can give it and as the speed comes up I was able to take a much deeper cut than when I was trying to cut at my normal cutting speeds.

looks like pins for elevator chains we used in the mine

Working in the shop is always fun until you get a short deadline. That always seems to suck most of the fun out of it for me. Hope you made the deadline, and I hope you didn’t get hurt trying to meet that deadline with all those stringy chips whipping around. Stay safe! Chris

Richard, I have the same problem too. Can't take deep enough of a cut on this hard stuff to make the chip breakers work right. Be careful with those birds nests they can pull you in.

Some challenges for sure Richard - not the friendliest of material too in a smaller size shop. I tend to get those stringy chips with 10-45 too. As Dave mentions (User) turning away from chuck can be useful. Look fwd to part 2. :)

You need to make a chip hook. Great quick project. I don't have one myself. What happened when you took more than .010? Seems like .050 would be reasonable. I don't have any of that allow to try out.

At 8.25 8.30 that doesn't happen too Richard 😉 towards the tailstock. Looking forward to part 2.. 3..

You are learning but jobs like these are good for that. :-)

Wonder what would happen if you turned away from the chuck?

Makin Sumthin From Nuthin I'm not sure if I misunderstood you saying you can't take a cut bigger than 10 thou.Whether because you can't get it to chip or the machine can't handle it.Such a small depth of cut shouldn't be a problem on any lathe given the diameter of the work piece.As a machine shop owner 4140 is one of my favourite materials to machine always gives good finish as long as you don't let the tool rub for long at the end of the cut against the shoulder which can work harden the material.From what I can see your main problem is the chip breaker on the insert you are using it's too wide not suited for very small cuts need a tighter chip breaker for shallow and finishing cuts.Also it's not a good practice to pre- drill hole in material you need to turn which as you say creates interrupted cutting and not ideal for carbide inserts.If your spindle bore is large enough to fit that size bar it's always quicker to use long enough bar that wont cause machine to shake or material to whip, for instance enough material to do 5 pieces in this case plus parting allowance and an inch or so to hold the last piece.This way you can completely turn each part and part off and once you finish turning them all you can put the pin head inside the chuck cavity which should fit without a problem looking at the size of the pin,pull it outwards against the jaw as a stop and machine or part off the bit on the end with centre hole.Now you should drill the hole.As they say practice makes perfect.

Man, those chips... I never touch them barehanded unless it's self defense. Like fighting a dog, you are GONNA get bit. Glad you didn't lose a finger....

Use a parting tool to under cut the hole close to finish diameter then hog the rest without the intermittent cut.

4140 is cromoly right I here that stuff is very hard to work with good work as always .

Felt the burnt blood right through the screen.

Carbide inserts do not like interrupted cuts. Also, when you start getting the long razor wire swarf, try changing your feed speed, spindle RPM's and/or your depth of cut. By playing with these, you can usually get rid of it. You needed a bigger lathe for this project taking .300" off. I would have taken it in 4-5 cuts....... LOL I hate the word RUSH

I forge a lot of 4140 , 2” round . Not the easiest stuff to machine. I go through plenty of insets .

You have time to video this?

i would have been cussing more then that lol

Oh my, , , Gloves make me shudder. I saw a friend get a glove snagged by a long chip and it pulled his arm right off. He died before we could get him to the hospital. We do stupid things thinking we are protected by them. On another occasion watched as another worker got tangled up in a 10 ft. master service radial arm drill the same way. You will never, ever see me with machine tools wearing gloves. I once fired a fella from doing just that. Please think and deal with flying chips with a simple straight 3/8 rod. Aside from that ass ripping I love working with 4140. Doesn't always give the best finish but really reliable stuff eh. Great order for ya bud but soooo many pieces would drive me nuts as I am sure almost did to you.LOL ! Your common sense is doing great on everything but the gloves bud. Take care and I hope to see you again with all your parts attached my friend. NO GLOVES !

bastard chips!

your chips are awful