How nuts and bolts are made video

Peter Cole said:

Without knowing that nuts and bolts are available less expensively
elsewhere, you could appreciate from this video why your local bike
and hardware shop charges so much for a Campagnolo nut or bolt.

Quoted message said:

Peter Cole said:

Without knowing that nuts and bolts are available less expensively
elsewhere, you could appreciate from this video why your local bike
and hardware shop charges so much for a Campagnolo nut or bolt.

Wow that was a flashback. Right after I graduated from college, I was
having a hard time finding a real engineering job, so I spent a little
over a year setting up cold heading and thread rolling machines. It's
almost as much art as science.

nate

--
replace "roosters" with "cox" to reply.
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In article
<[email hidden]>,

Quoted post said:

Peter Cole said:

Without knowing that nuts and bolts are available less expensively
elsewhere, you could appreciate from this video why your local bike
and hardware shop charges so much for a Campagnolo nut or bolt.

As the old joke goes, they lose money on every part, but make it up in
volume.

--
Ryan Cousineau [email hidden] http://www.wiredcola.com/
"In other newsgroups, they killfile trolls."
"In rec.bicycles.racing, we coach them."

Ryan Cousineau said:

In article
<[email hidden]>,

Quoted post said:

Peter Cole said:

Without knowing that nuts and bolts are available less expensively
elsewhere, you could appreciate from this video why your local bike
and hardware shop charges so much for a Campagnolo nut or bolt.

As the old joke goes, they lose money on every part, but make it up in
volume.

It was interesting to see that the finished bolt and nut were basically
squeezed out of the starting metal as if it were clay. At no point was
anything cut off leaving bits of metal or swarf on the floor to be swept
up and melted down again.

I always assumed nuts were punched from a thick sheet and that to make
the bolt heads you would have to at least cut off the corners. But no.
The way they do it is not only cheaper and more efficient but may also
leave favourable residual stresses of some kind in the finished bolt.
But I have my doubts about that guess because after that they gave the
bolts a couple of good bakings in a hot oven.

I read here:
http://www.portlandbolt.com/faqs/rolled-vs-cut-threads-bolts

that one of the advantages of roll threading is that the "cold working on
the threads makes them more resistant to damage during handling".
Wouldn't any cold working effect be reset by the heating in the oven?

Peter Cole said:

All that and I can strip 'em in two seconds.

Cracker Bill

Bill Sornson said:

Peter Cole said:

All that and I can strip 'em in two seconds.

You aren't using proper torque spec's. You have to be careful to tighten it
until it just starts to strip and then you back off a little. Then use loctite.

<Hobbes@spnb&s.com> wrote in message
news:[email hidden]...

Quoted message said:

Bill Sornson said:

Peter Cole said:

All that and I can strip 'em in two seconds.

You aren't using proper torque spec's. You have to be careful to tighten
it
until it just starts to strip and then you back off a little. Then use
loctite.

You add the loctite _after_ you've already tightened the the fastener?

On Thu, 17 Apr 2008 12:47:04 -0500, "Carl Sundquist" <[email hidden]>

Quoted message said:

Quoted message said:

You aren't using proper torque spec's. You have to be careful to tighten
it
until it just starts to strip and then you back off a little. Then use
loctite.

Sure... if you use it before, it would make it awfully hard to undo
the nut later!

Quoted message said:

You add the loctite _after_ you've already tightened the the fastener?

"still just me" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

On Thu, 17 Apr 2008 12:47:04 -0500, "Carl Sundquist" <[email hidden]>

Quoted message said:

Quoted message said:

You aren't using proper torque spec's. You have to be careful to tighten
it
until it just starts to strip and then you back off a little. Then use
loctite.

Sure... if you use it before, it would make it awfully hard to undo
the nut later!

Please tell me you aren't being serious?

Quoted message said:

Quoted message said:

You add the loctite _after_ you've already tightened the the fastener?

I'm not going to answer this yet as I think you are all taking the [censored] 🙂

Cheers Dre

Peter Cole said:

Thanks Peter!

'How It's Made' is one of my fav cable TV shows.

I think it is on Discovery Channel but it could be on A&E.

J.

Jay said:

Peter Cole said:

Thanks Peter!

'How It's Made' is one of my fav cable TV shows.

I think it is on Discovery Channel but it could be on A&E.

It's Discovery, right before Cash Cab in the afternoon. I always
end up with the last 60 seconds of it when I Tivo CC.

--

Kristian Zoerhoff
[email hidden]

On Apr 18, 10:44 am, Kristian M Zoerhoff <[email hidden]>

Quoted message said:

On 2008-04-18, Jay <[email hidden]> wrote:

It's Discovery, right before Cash Cab in the afternoon. I always
end up with the last 60 seconds of it when I Tivo CC.

--

Kristian Zoerhoff
[email hidden]

danke KMZ

J.