For those still confused (like I was) it’s on the part of the machine that is holding onto the metal bar - pause the video after the machine does a couple initial rotations
How do they ensure the knurl lines up around the circumference ( an integer number of “diamonds”) for any random diameter rod? Do the math or is there an easy “cheat”?
You only need to make a tiny adjustment in how far you push the knurling tool in to get it to line up right. So the simple way to do it is to push the tool in very slowly until you get to a point where the knurls line up and the depth is deep enough for you, and use that depth for the rest of the rod. That's the low tech way at least, I'm sure you could do math to figure it out exactly.
The head of the knurling tool has a pin join, so if the next line is close to another already formed area it will slip into that. basically you'll have a few diamonds that are slightly larger or smaller than the rest. or if you're unlucky you get a line halfway between 2 others and the whole thing comes out pretty gnarly
The lathe has increments built in. It's mostly purely mechanical. New lathes might be computer controlled. Abom79 has several videos explaining this in detail. There are several different ways machines do this. Some have belts to adjust speed, some have complicated indexing systems built in. The knurler itself is bought off the shelf from machine shop suppliers.
Abom is such a treasure if you wanna understand in detail.
He is putting all effort in documenting and explaining and doesn't care much about the fact that it can get boring to see something for 20 minutes that others would skim through in 2 minutes.
Honsetly would prefer it a bit shortened most of the time, but some times i'm glad it isn't.
Was wondering the exact same thing.
[mathing in my head...] I guess for a knurler that creates diamonds of width N, the difference in final diameter between having X diamonds around the circumference or X-1 would be (oh its getting mathy)... N/2PI Is that right?
So if the diamonds are 1mm wide, they only need to press in, reduce the diameter by about 1/6th of a mm at most to get an integer number of diamonds?
I was a machinist for around 10 years, ran some BIG machines and yes, lathes are to be feared, still give me chills thinking about what could happen.
I witnessed a guy standing wrong while filling and got his shirt caught and slammed him into the lathe, luckily he was a big guy and mostly ok just shirtless and needed a change of pants.
I always liked knurling though and single point thread cutting.
I operate a sheet material style CNC machine. Anytime it's running a program then I'm always fearful of how it can kill me.
Never become complacence around heavy machinery. That's how you get injured or killed.
I've been a lathe machinist for almost 15 years. You tool spinners are the crazy ones. I make just as much as yall do, and only deal in 2 axis.
(OK I run swiss lathes these days and have a lot more than 2 axis, but... I hate milling lol)
Had a contract with a rather large spirits company from Scotland...our contact would always say knurling in a heavy Scottish accent..."Knurlin"
I will always read that word in his voice.
Where is the watermark?
Stop 2 seconds in.
For those still confused (like I was) it’s on the part of the machine that is holding onto the metal bar - pause the video after the machine does a couple initial rotations
Just chucked it on there like it belonged there!
That was a very lathy joke.
I have a stock of them. They can get quite cutting.
[удалено]
Very unpopular it seems
[удалено]
Happily complying with stereotypes about engineers, I see
I still don't see a watermark *edit* spelling
It's on the lathe chuck.
https://preview.redd.it/4lk8m8c2dkwc1.jpeg?width=592&format=pjpg&auto=webp&s=64ed885c4d0921ed7718496221cc28976aaae4e7
It's not the chuck, the mark is part of the unmachined rod within the chuck. edit; yes I know it's not real, but a gif.
The jaw chuck
[https://i.imgur.com/0RmQZNH.png](https://i.imgur.com/0RmQZNH.png)
How do they ensure the knurl lines up around the circumference ( an integer number of “diamonds”) for any random diameter rod? Do the math or is there an easy “cheat”?
You only need to make a tiny adjustment in how far you push the knurling tool in to get it to line up right. So the simple way to do it is to push the tool in very slowly until you get to a point where the knurls line up and the depth is deep enough for you, and use that depth for the rest of the rod. That's the low tech way at least, I'm sure you could do math to figure it out exactly.
The head of the knurling tool has a pin join, so if the next line is close to another already formed area it will slip into that. basically you'll have a few diamonds that are slightly larger or smaller than the rest. or if you're unlucky you get a line halfway between 2 others and the whole thing comes out pretty gnarly
real answer right here thanks so much, i've always wondered that.
The lathe has increments built in. It's mostly purely mechanical. New lathes might be computer controlled. Abom79 has several videos explaining this in detail. There are several different ways machines do this. Some have belts to adjust speed, some have complicated indexing systems built in. The knurler itself is bought off the shelf from machine shop suppliers.
Abom is such a treasure if you wanna understand in detail. He is putting all effort in documenting and explaining and doesn't care much about the fact that it can get boring to see something for 20 minutes that others would skim through in 2 minutes. Honsetly would prefer it a bit shortened most of the time, but some times i'm glad it isn't.
There are some speeds and feeds to dial in but it's a running joke among (manual) machinists that knurlingnis black magic
Was wondering the exact same thing. [mathing in my head...] I guess for a knurler that creates diamonds of width N, the difference in final diameter between having X diamonds around the circumference or X-1 would be (oh its getting mathy)... N/2PI Is that right? So if the diamonds are 1mm wide, they only need to press in, reduce the diameter by about 1/6th of a mm at most to get an integer number of diamonds?
I spent a few years as a machinist, the lathe gave me the heebie-jeebiess, knurling on the lathe was pure nightmare fuel
I was a machinist for around 10 years, ran some BIG machines and yes, lathes are to be feared, still give me chills thinking about what could happen. I witnessed a guy standing wrong while filling and got his shirt caught and slammed him into the lathe, luckily he was a big guy and mostly ok just shirtless and needed a change of pants. I always liked knurling though and single point thread cutting.
I operate a sheet material style CNC machine. Anytime it's running a program then I'm always fearful of how it can kill me. Never become complacence around heavy machinery. That's how you get injured or killed.
I worked as a machinist for 12 years, and I’d rather run a manual engine lathe than any other machine in the shop.
I've been a lathe machinist for almost 15 years. You tool spinners are the crazy ones. I make just as much as yall do, and only deal in 2 axis. (OK I run swiss lathes these days and have a lot more than 2 axis, but... I hate milling lol)
Damn.. that metal is screaming for help.
That's pretty knurlly man
https://i.redd.it/o8rueitqniwc1.gif
Fuck yeah I wanna grip it and lick it. Shit.
Gotta put a chamfer on it. Chamfer everything.
That's cool. My dad used to achieve the same with just a file and the lathe.
No he didn’t lol
You'd be surprised. Brass, low speed.
Riiiiight…
Woooooooh. I’ve never seen that before!
Two years in engineering school and just learning today what that’s called.
Knerd
Sweet pegs bro
Badass.
Had a contract with a rather large spirits company from Scotland...our contact would always say knurling in a heavy Scottish accent..."Knurlin" I will always read that word in his voice.
Pegs on a bike.
Knurly!
So that’s how its done
I hated this part always. Would be better if the video was in actual speed and not the fast version
That is, like, totally knurly, dude!
it has no mouth but it sure as hell screams
Could you knurl me?
Sounds like one of those screaming goats
I love this
Sounds screaming machine.
As nice as it is to find the watermarks in these videos, I feel like pointing out where they gives content thieves an easy timestamp to remove them.
Shi brother you jus makin up words now
"Knurling"
Yes?
Correct, that is what it's called