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Ignoramus29862
Guest
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 Posted: Tue Aug 29, 2006 10:21 pm Post subject: 4 inch diameter bolts |
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I have two taps that are 4"-4 taps (that is, for four inch diameter
bolts with four threads per inch). These taps are quite weighty, about
40 lbs each I would say. I realized that never in my life I ever saw
4" diameter bolts that could be screwed into holes tapped by those
taps. Not even on the san francisco golden gate bridge, perhaps I
missed something. So... has anyone ever seem such bolts or uses
thereof?
i |
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Guest
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| Posted: Tue Aug 29, 2006 10:50 pm Post subject: Re: 4 inch diameter bolts |
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Ignoramus29862 wrote:
| Quote: | I have two taps that are 4"-4 taps (that is, for four inch diameter
bolts with four threads per inch). These taps are quite weighty, about
40 lbs each I would say. I realized that never in my life I ever saw
4" diameter bolts that could be screwed into holes tapped by those
taps. Not even on the san francisco golden gate bridge, perhaps I
missed something. So... has anyone ever seem such bolts or uses
thereof?
i
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I saw some studs on a natural gas pumping engine that were about that
size, it was a V4. Pistons about the size of trash cans.
Stan |
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Glenn Ashmore
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| Posted: Tue Aug 29, 2006 10:51 pm Post subject: Re: 4 inch diameter bolts |
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I got a tour of the engine room of a big new Hyundai Industries container
ship last year. I didn't actually see one out but bolts holding the engine
to the bed had heads a good 6" diameter. Also the big trucks they use out
at the chalk mines east of me are held together with some pretty darn big
screws. :-)
--
Glenn Ashmore
I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com
"Ignoramus29862" <ignoramus29862@NOSPAM.29862.invalid> wrote in message
news:rI_Ig.203414$B82.25978@fe53.usenetserver.com...
| Quote: | I have two taps that are 4"-4 taps (that is, for four inch diameter
bolts with four threads per inch). These taps are quite weighty, about
40 lbs each I would say. I realized that never in my life I ever saw
4" diameter bolts that could be screwed into holes tapped by those
taps. Not even on the san francisco golden gate bridge, perhaps I
missed something. So... has anyone ever seem such bolts or uses
thereof?
i
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Joe AutoDrill
Guest
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| Posted: Tue Aug 29, 2006 10:53 pm Post subject: Re: 4 inch diameter bolts |
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"Ignoramus29862" <ignoramus29862@NOSPAM.29862.invalid> wrote in message
news:rI_Ig.203414$B82.25978@fe53.usenetserver.com...
| Quote: | I have two taps that are 4"-4 taps (that is, for four inch diameter
bolts with four threads per inch). These taps are quite weighty, about
40 lbs each I would say. I realized that never in my life I ever saw
4" diameter bolts that could be screwed into holes tapped by those
taps. Not even on the san francisco golden gate bridge, perhaps I
missed something. So... has anyone ever seem such bolts or uses
thereof?
|
I haven't seen 4" but I've seen somewhere around 3"
They were the bolts holding down a housing in which spun a 250 lb. blade for
chopping up plastic prior to recycling.
The blade ran at a few hundred RPM and let me tell you... If anything fell
in there, it was gone. It was an open hopper system where people threw
plastic in by hand too. Back in the late 70's... I'm sure OSHA would LOVE
to see a plant like that now.
The same place had an 8' wide gillutine for chopping up full 4' X 4' or
larger boxes of plastic that were filled when molten - i.e. solid cubes. It
had a dual stage ram that was capable of cutting just about anything I threw
(er... anyone else I mean) in there to test it.
Sure wish I had photos.
Regards,
Joe Agro, Jr.
(800) 871-5022
01.908.542.0244
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com
V8013-R |
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Ned Simmons
Guest
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| Posted: Tue Aug 29, 2006 11:01 pm Post subject: Re: 4 inch diameter bolts |
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In article <rI_Ig.203414$B82.25978@fe53.usenetserver.com>,
ignoramus29862@NOSPAM.29862.invalid says...
| Quote: | I have two taps that are 4"-4 taps (that is, for four inch diameter
bolts with four threads per inch). These taps are quite weighty, about
40 lbs each I would say. I realized that never in my life I ever saw
4" diameter bolts that could be screwed into holes tapped by those
taps. Not even on the san francisco golden gate bridge, perhaps I
missed something. So... has anyone ever seem such bolts or uses
thereof?
i
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Coincidentally, I have a shiny new 4-4 UNS tap sitting on the back
corner of my desk. It came in an bankruptcy auction lot from a machinery
builder, part of the fiasco that closed Bridgeport down for a while.
Two places I've seen threads this large, and larger, are on the tie rods
of presses and injection molding machines. There's often a hydraulic nut
on one end of the rod. Like so...
http://www.tentec.co.uk/tchn3.htm
Ned Simmons |
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Jim Stewart
Guest
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| Posted: Tue Aug 29, 2006 11:32 pm Post subject: Re: 4 inch diameter bolts |
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Ignoramus29862 wrote:
| Quote: | I have two taps that are 4"-4 taps (that is, for four inch diameter
bolts with four threads per inch). These taps are quite weighty, about
40 lbs each I would say. I realized that never in my life I ever saw
4" diameter bolts that could be screwed into holes tapped by those
taps. Not even on the san francisco golden gate bridge, perhaps I
missed something. So... has anyone ever seem such bolts or uses
thereof?
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I seem to recall that the bolts that
hold the Space Needle to it's foundation
are about 4". Anyone taken a look lately? |
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RoyJ
Guest
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| Posted: Wed Aug 30, 2006 12:13 am Post subject: Re: 4 inch diameter bolts |
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That's a fairly small tap for the main tie bolts on a press. My local
machinery repair place usually has a couple of bolts they are working
on, usually have the threaded end plucked off of 150mm or 200 mm rods.
Ignoramus29862 wrote:
| Quote: | I have two taps that are 4"-4 taps (that is, for four inch diameter
bolts with four threads per inch). These taps are quite weighty, about
40 lbs each I would say. I realized that never in my life I ever saw
4" diameter bolts that could be screwed into holes tapped by those
taps. Not even on the san francisco golden gate bridge, perhaps I
missed something. So... has anyone ever seem such bolts or uses
thereof?
i
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Dave Hinz
Guest
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| Posted: Wed Aug 30, 2006 12:23 am Post subject: Re: 4 inch diameter bolts |
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On Tue, 29 Aug 2006 19:13:40 GMT, RoyJ <spamless@microsoft.net> wrote:
| Quote: | That's a fairly small tap for the main tie bolts on a press. My local
machinery repair place usually has a couple of bolts they are working
on, usually have the threaded end plucked off of 150mm or 200 mm rods.
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So the obvious question (to me, anyway) is who can Iggy sell these to
and what are they worth? |
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Guest
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| Posted: Wed Aug 30, 2006 1:39 am Post subject: Re: 4 inch diameter bolts |
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Perhaps people that repair / overhaul smallish 4 - post punch presses.
The REALLY big presses, 2000 ton capacity range, have 4 tie rods the
size of telephone poles.
I've seen 8" dia studs, 8 of them, holding the two clamshell halves
together for hydraulic turbine butterfly valves. These were 5 meter in
dia. and operated at around 600 psi IIRC.
Tightening these was a REAL problem, NOT that it had to be....
Wolfgang
Dave Hinz wrote:
| Quote: | On Tue, 29 Aug 2006 19:13:40 GMT, RoyJ <spamless@microsoft.net> wrote:
That's a fairly small tap for the main tie bolts on a press. My local
machinery repair place usually has a couple of bolts they are working
on, usually have the threaded end plucked off of 150mm or 200 mm rods.
So the obvious question (to me, anyway) is who can Iggy sell these to
and what are they worth? |
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Ignoramus29862
Guest
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| Posted: Wed Aug 30, 2006 2:26 am Post subject: Re: 4 inch diameter bolts |
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On 29 Aug 2006 13:39:55 -0700, wfhabicher@hotmail.com <wfhabicher@hotmail.com> wrote:
| Quote: | Perhaps people that repair / overhaul smallish 4 - post punch presses.
The REALLY big presses, 2000 ton capacity range, have 4 tie rods the
size of telephone poles.
I've seen 8" dia studs, 8 of them, holding the two clamshell halves
together for hydraulic turbine butterfly valves. These were 5 meter in
dia. and operated at around 600 psi IIRC.
Tightening these was a REAL problem, NOT that it had to be....
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That's a great guess, I think that these ones are used mostly for
presses etc. Thanks to you and others. For some reason, I have
accumulated a little tap collection of various interesting taps (to
which these huge taps would not be a part), but I did not know why
would people need the big taps like that.
i |
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Gene Cash
Guest
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| Posted: Wed Aug 30, 2006 2:55 am Post subject: Re: 4 inch diameter bolts |
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Ignoramus29862 <ignoramus29862@NOSPAM.29862.invalid> writes:
| Quote: | I have two taps that are 4"-4 taps (that is, for four inch diameter
bolts with four threads per inch). These taps are quite weighty, about
40 lbs each I would say. I realized that never in my life I ever saw
4" diameter bolts that could be screwed into holes tapped by those
taps. Not even on the san francisco golden gate bridge, perhaps I
missed something. So... has anyone ever seem such bolts or uses
thereof?
|
When you visit Kennedy Space Center, there's a talk you can attend about
the Shuttle. The Shuttle is held to the pad by 8 bolts, 4 around the
base of each SRB.
These bolts are 28" long and 3.5" in diameter, and weigh something like
60 or 70 pounds. So they're just a hair smaller than 4" diameter. I
don't know what the TPI is, but 4/inch looks about right.
The threads are VERY sharp too, so they don't let you handle it.
-gc
--
Remember, don't worry about the bullet with your name on it. Worry about all
the other bullets simply marked "Occupant" |
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Lew Hartswick
Guest
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| Posted: Wed Aug 30, 2006 3:19 am Post subject: Re: 4 inch diameter bolts |
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Ignoramus29862 wrote:
| Quote: | I have two taps that are 4"-4 taps (that is, for four inch diameter
bolts with four threads per inch). These taps are quite weighty, about
40 lbs each I would say. I realized that never in my life I ever saw
4" diameter bolts that could be screwed into holes tapped by those
taps. Not even on the san francisco golden gate bridge, perhaps I
missed something. So... has anyone ever seem such bolts or uses
thereof?
i
Saw quite a few cap nuts for (as I remember it) 6 inch threads. |
the gentelman who had these told me they were from the "bolts"
that were used in a power plant to hold the steam boiler
together or some such. He was an "operator" or something like
that in a local coal fired plant. I may even have one of them
back in PA in a barn on the property I have back there.
I guess I'd call them a cap nut since the threaded holes
don't go all the way through. The back end is a very large
hex though not a dome.
...lew... |
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Eric R Snow
Guest
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| Posted: Wed Aug 30, 2006 4:15 am Post subject: Re: 4 inch diameter bolts |
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On Tue, 29 Aug 2006 21:55:45 GMT, Gene Cash <gcash@cfl.rr.com> wrote:
| Quote: | Ignoramus29862 <ignoramus29862@NOSPAM.29862.invalid> writes:
I have two taps that are 4"-4 taps (that is, for four inch diameter
bolts with four threads per inch). These taps are quite weighty, about
40 lbs each I would say. I realized that never in my life I ever saw
4" diameter bolts that could be screwed into holes tapped by those
taps. Not even on the san francisco golden gate bridge, perhaps I
missed something. So... has anyone ever seem such bolts or uses
thereof?
When you visit Kennedy Space Center, there's a talk you can attend about
the Shuttle. The Shuttle is held to the pad by 8 bolts, 4 around the
base of each SRB.
These bolts are 28" long and 3.5" in diameter, and weigh something like
60 or 70 pounds. So they're just a hair smaller than 4" diameter. I
don't know what the TPI is, but 4/inch looks about right.
The threads are VERY sharp too, so they don't let you handle it.
-gc
Why were the threads so sharp? |
ERS |
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Gene Cash
Guest
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| Posted: Wed Aug 30, 2006 4:39 am Post subject: Re: 4 inch diameter bolts |
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Eric R Snow <etpm@whidbey.com> writes:
| Quote: | On Tue, 29 Aug 2006 21:55:45 GMT, Gene Cash <gcash@cfl.rr.com> wrote:
Ignoramus29862 <ignoramus29862@NOSPAM.29862.invalid> writes:
I have two taps that are 4"-4 taps (that is, for four inch diameter
bolts with four threads per inch). These taps are quite weighty, about
40 lbs each I would say. I realized that never in my life I ever saw
4" diameter bolts that could be screwed into holes tapped by those
taps. Not even on the san francisco golden gate bridge, perhaps I
missed something. So... has anyone ever seem such bolts or uses
thereof?
When you visit Kennedy Space Center, there's a talk you can attend about
the Shuttle. The Shuttle is held to the pad by 8 bolts, 4 around the
base of each SRB.
These bolts are 28" long and 3.5" in diameter, and weigh something like
60 or 70 pounds. So they're just a hair smaller than 4" diameter. I
don't know what the TPI is, but 4/inch looks about right.
The threads are VERY sharp too, so they don't let you handle it.
-gc
Why were the threads so sharp?
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*** if I know. I guess they wanted to show off their precision
threadcutting machine? It looked like the bolts were machined instead of
being made with a die, to my totally amateur eye.
Now that I think about it, I thought all large threaded items were
machined, so I didn't think there'd be taps/dies this large.
Hey look... the sig-monster has learned to read...
-gc
--
It's unfortunate, but the way the American people are, now that they have
developed all this capability, instead of taking advantage of it, they'll
probably just piss it all away.
-- President Lyndon Johnson, on the Apollo program |
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Martin H. Eastburn
Guest
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| Posted: Wed Aug 30, 2006 5:18 am Post subject: Re: 4 inch diameter bolts |
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Ever been on a deep sea oil rig ? - platform I mean ? -
Some stuff has to be bolted - like buildings and cranes. Think of a heavy
crane that brings 'stuff' - like stem tubes to the site - and food... people...
There are some really big things out there - like big Earth moving or scooping machines...
Martin
Martin H. Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
NRA LOH & Endowment Member
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member
http://lufkinced.com/
Ignoramus29862 wrote:
| Quote: | I have two taps that are 4"-4 taps (that is, for four inch diameter
bolts with four threads per inch). These taps are quite weighty, about
40 lbs each I would say. I realized that never in my life I ever saw
4" diameter bolts that could be screwed into holes tapped by those
taps. Not even on the san francisco golden gate bridge, perhaps I
missed something. So... has anyone ever seem such bolts or uses
thereof?
i
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