Hand threading with a die

Hand threading a rod with a die

[thomasblackwell]

sir:
That was the best demonstration of threading I have ever seen. Thank you so much for your patience and time. I have actually learned something.

[OrgytenThePyroxenes]

Quite amazing how few people use split dies correctly, and this is an example of someone not realising what they are doing. The die is split for a reason, and the holder has grub screws for a reason, yet few people ever mention them. The die should be installed in the holder with the split in line with the middle grub screw. You should tighten the middle screw a little to expand the die for the first cut. It’s instead of having first second and bottom taps for internal threads. Expanding the die makes the first cut if the thread shallow so that the thread isn’t fully bottomed out and it’s easier to cut, especially if you have a very long thread to cut. Once you have done a first pass, you loosen the middle screw and just nip up the outer two screws, just a tad. This closes the die a tiny amount such that when you make the next pass the thread is cut to the very bottom of the thread profile. The screws are also a way of matching the size of an existing thread if the thread length needs to be increased. The screws can be tightened until the die is not loose on the existing thread, and this ensures that the new thread is cut to the same diameter. The guy in this video put the die in the holder in the wrong position and didn’t even bother with the screws. Not the end of the world, but in some circumstances you may end up with a thread that is too tight for a matching female thread if you don’t know what you’re doing.

[Terry-sbbk]

Thank you sir for helping me to understand better what I've been doing wrong. I'm in between a rock & a hard spot because I'm trying to make a stud for my tractor engine that has been DISCONTINUED. It is 3.375"/85.725mm long. It is a rocker stud in the head that I MUST have to get my diesel engine back running. The stud 10mm has 1.5mm threads .625"/15.875mm long on one end with 1.25mm threads 1.5"/38.10mm long on the other end with a NO THREAD area in the middle 1.25"/31.75mm. So far, the two that I have threaded have bent slightly just enough that they WON'T work in the rockers in the engine. I'm NOT giving up because if I don't get one to work my tractor is done. Thanks for your insight that has helped me. Keep your fingers crossed that I can get two made. GOD BLESS SIR!🙏🙏🙏

[minskie]

Best instructional video I’ve seen explaining threading with dies!

[waynetetley]

Always worth checking out what you think you already know. I learnt a lot from your explanation. Much appreciated

[billwells]

Thank you, excellent help. Pleasure to see a skilled machinist teaching.

[justinsuydamjs]

7:58 is where you just taught me my lesson. I’ve been trying a damn hex die to make the threads.

[FXRChristopher]

You kown I've been doing this for years and learn a lot from this little video. Thank you.

[SWORDSLINGEROMIO]

Thank you for sharing the knowledge of threading with us

[MoparDan]

Thanks for this very informative video. I learned some things that I didn’t know before. I’m wanting to correctly chase the threads on
1/8-27, 1/4-18 and 3/8-18 pipe in the near future.

[THX]

Great Job Sir. I'm doing a tap dance 😂😂

[danielwilkerson]

Great video man. Thank you. I really appreciate the instruction and useful tips.

[crackedfingerz]

So, is the rod 3/8" diameter or a bit smaller. I've seen a lot of videos on this subject, and no one ever mentions the size of the rod in relation to the size of the die. This would be very helpful for a rookie such as myself. Very clear and to the point tutorial though. Thank you.

[biodread]

How the hell did you keep the rod from turning in the vice? I have been trying to cut 5-40 threads on a 1/8” stainless steel rod and the Torque from the die stock turns the rod and I can’t go any further. I finally had to file flat spots on each side and hold with a crescent wrench and vice to keep the rod from spinning.

[thumperstick]

Is going from 1/2 diameter thread to 3/8 thread too fine of material to cut new threads?

[oldoldpilgrim]

You answered all of my questions except for recommending a cutting fluid. Thanks!

[bmanufacturing]

I can’t find a video on how to keep it from spinning in the vise, I got my fuse so tight I almost bent the handle and the 1/4 round keeps turning in the vise, yeah it’s a weak mill vise but there’s gotta be a a trick to hold it

[rogersrabbithole]

In all my years of experience with machines & Repairing equipment of all shapes types and sizes nobody has ever tried to teach me or pass it on to me what die nut to use for a specific job. that's a new one on me. I've been cranking a wrench close to 40 years. guess it's never too late to teach a old dog new tricks... ????

[kerrywil]

HI, when I am using a Die to thread a rod i never seam to get the correct diameter in the lathe. where does one find the diameter of the rod for a specific threading Die. An example, the diameter of rod for a 1/4 28 or a 5/8 11 Die? Thank you.

[spartaeus]

What's the largest size rod that can be threaded by hand ?? I need to thread a 5/8" rod to 5/8-18 thread.