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Have you ever made your own chuck? If so how did it go?

greenthing

Plastic
Joined
May 19, 2020
I often see people buying new chucks who already have lots of tooling and big machinery. I'm wondering why people don't make their own more often? Have you ever tried?
 
Are you absolutely certain that you're on the right forum?

Or a troll.

Stop with the really stupid questions. There are a lot of other forums where you can ask them and get maybe 5 million affirming answers to make you feel good.

Of course none of them have actually done anything so time consuming and pointless, but they'll help you with your issues.

And even if they don't, we'll be spared the stupid bottom-feeder hobbyist crap.

PDW
 
No matter how SKILLED a person be, we only get but so much TIME. Humans 'specialize" so as to gain the most from wise use of their own time, trade the gains for products made by some OTHER specialists working into the wise use of THEIR time.

If you are not to be seen as a foolish parasite, you should learn to read more, post less.

You would have more time if you didn't spend all day on practicalmachinist with 20,000 posts. You're worse than some twitter millennial.
 
Hey, greenthing, you're not going to fix thermite. He's absolutely incorrigible, simultaneously prolix and telegraphic, and frequently incoherent. Not to mention retired, bored and constantly on-line. And in this case, he and PDW have a point.

I gave one of your other queries a straight answer, and I'll do the same for this one, but you probably need to find a different forum for this level of "why is the sky blue" or "why do you guys have big machines".

Building even a half-assed chuck is not an easy job. Tolerances are fairly tight, special cutters are required to cut some of the places where jaws slide in the body, those places should ideally be ground (required even more specialized grinding tools!), there's a spiral scroll gear to cut which is pretty much impossible without either specialized production machinery (old-school) or a CNC mill with a custom form cutter (new school), a set of really odd-ball "gears" which are the pinions which drive the face gear that turns the scroll, etc., etc., etc.

Independent jaw chucks (like a typical 4-jaw chuck) are somewhat simpler than scroll chucks (like a typical 3-jaw chuck), but if you are not in the business of making chucks, it is a huge investment of time. Frankly, most shops can buy a much better chuck than they can make, and get it faster and cheaper, too!
 
I gave one of your other queries a straight answer, and I'll do the same for this one, but you probably need to find a different forum for this level of "why is the sky blue" or "why do you guys have big machines".

Terribly sorry, I wouldn't want to dull the quality of the inane grandpa ramblings. Next time I'll try to make a better post, like "what paint marker do you use".

- Ron
(sent from my blackberry)
 
Terribly sorry, I wouldn't want to dull the quality of the inane grandpa ramblings. Next time I'll try to make a better post, like "what paint marker do you use".

- Ron
(sent from my blackberry)

On a ratings scale, you are above the paint marker post. But it is titled with "OT" which means Off Topic. This is accepted if somebody is in a bind or needs non-metal-head expertise.
 
The time put into making one would cost way more than just buying a new chuck. They may look like a hunk of metal with some moving parts, take one apart one day...I'm sure you'll be surprised at the precision needed for a good chuck to work right.
 
I often see people buying new chucks who already have lots of tooling and big machinery. I'm wondering why people don't make their own more often? Have you ever tried?

In woodworking there is the Richard Raffin chuck that does not have conventional jaws, but contracting rings. Not that hard to make with manual machine tools.
 
You would have more time if you didn't spend all day on practicalmachinist with 20,000 posts. You're worse than some twitter millennial.

He's right you know.

I've been designing fixtures and machinery for over 35 years.

And he's spot on.
 
I often see people buying new chucks who already have lots of tooling and big machinery. I'm wondering why people don't make their own more often? Have you ever tried?
For each piece of any project there is setup time. If you are making one of each piece it can be a huge part the time involved. If you are making 500 or 10,000 pieces then the set up time is insignificant on a per piece basis. Then you have material costs which are also less when you buy in huge quantities as opposed to buying a cut off when often the shipping is as much as the material. For the body are you going to cast the shape in iron yourself? Not likely. You will have to machine it from a huge billet. The only way it could possibly be worth while would be if someone gave you a complete cnc program already proven, you had the cnc machine necessary, and you had scrap material lying around.
 
You would have more time if you didn't spend all day on practicalmachinist with 20,000 posts. You're worse than some twitter millennial.

In defense of Thermite, if he likes to type a lot here then it's his right. Sometimes he has a thought.
But I don't have the time or interest to sift through all the paragraphs. So I don't. Nobody has told him about the Cone of Silence.

Cone of Silence (Get Smart) - Wikipedia
 
Made an er collet chuck to mount to a d1-5 face on my lathe at home. I would never have made this at work. Way too much time stuck in it. Even so, I already had the collets and bought the nut.
It was more of a challenge thing than cost saving, since it is only 4140 prehard it's not really for a heavy use item.

Dave
 
.

Let's keep it real, shall we?.

YOUR "cone" of ignorance is the common "bell curve" of statistical distribution, and most of it is simply above your pay-grade.

No foul. There is work of SOME kind for EVERYBODY. Especially if I stir 'em up to speed-up the process. It's what a "synthesist" style thinker JF DOES.

I'm good wit' dat' by choice.

I can learn SOMETHING of value from just about ANYBODY. Any time. Anywhere. Any situation.

Some others, it's necessity.
Learning is NOT so easy. Especially if they block it out of misplaced arrogance.

Keep trying, anyway....

Meanwhile...

"Run what you got!"


Cheap shite audio jacks this week, is it? Oy! "the humanity!"

You and the greenthing are MADE for each other!

:D

I didn't even read the stuff, so you can read it for me. :drink:

Without little poster questions you would be nothing ...
Like the guy who dies a few weeks after retiring from work. Work was all he had ... :drink:

Thermite reminds me of the old lady walking on the side walk and a person with a dog is walking the other way.
The old lady keeps saying hello to the dog walker in order to feel some companionship/ownership with the dog.
The person ignores the old lady crying for some kind of bond, the lonely life is too much for her.
The person doesn't allow a free-loader to come in.
But the old lady keeps trying because she knows she's a dead duck. :popcorn:
 
Hey Thermite, that "like" came in 60 seconds after I typed return. :drink:

For those enjoying this program, this is a station break:

Watch the Get Smart weekend marathon on Decades Channel. A lot better than this here. :D
 








 
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