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Need to rig up something...


 
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DiyDave
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PostPosted: Thu Feb 14, 2013 4:26 pm    Post subject: Need to rig up something... Reply to specific post Reply with quote

Some ijit ran down a sign I made out of some farm junk, and I need to make a patch, does anyone know what the ID of a 4" schedule 40 coupler is? I need about 4-1/2" to 4-5/8" ID, to slip over the broken ends of the signpost, and attach all together with set screws. If it's a little tight, I can turn the ID to what I need, if it has thick enough side walls. Any other pipe out there, with a 4-1/2" ID??
 
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george md
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Joined: 22 Oct 2001
Posts: 2132
Location: Whiteford , Md

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PostPosted: Thu Feb 14, 2013 7:14 pm    Post subject: Re: Need to rig up something... Reply to specific post Reply with quote



Dave ,

How thick and how long ? I have a 7" dia

piece of cored stock with 3" hole , can bore to

fit.

george
 
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Cliff Nelson
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Joined: 26 Mar 2009
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PostPosted: Thu Feb 14, 2013 8:57 pm    Post subject: Re: Need to rig up something... Reply to specific post Reply with quote

OD of 4 inch pipe is 4 1/2 inches so you could bore the threads out of a coupling to get what you need.
 
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DiyDave
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PostPosted: Fri Feb 15, 2013 5:33 am    Post subject: Re: Need to rig up something... Reply to specific post Reply with quote

Thanks for the offer, George. I think I can find the coupler local. Have you ever seen a tobacco prize screw? That is what I'm using as a signpost. Can't weld it at the end of the driveway, AND it's cast iron! Whoever did it, will be in for a surprise, if they try it again, I have some sharp improvements ready for them!
 
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jackinok
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Joined: 29 Apr 2010
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PostPosted: Fri Feb 15, 2013 6:38 am    Post subject: Re: Need to rig up something... Reply to specific post Reply with quote

shcedule 40 plastic ,4.5 inches od with a wall thickness of .237"
steel pipe, has the same od, but the wall thickness varies by the wt of pipe . std wt black/galv pipe is the same as schedule 40 pvc
IF you use a threaded steel/sch 40pvc threaded coupling,turning the threads out should make a slip coupling. if this is what you need,and its strong enough, a sch 40 glue coupling should slide over either snuggly. problem may be putting your set screws in a pvc coupling. even though its very easy to tap, threads would strip easily. in that case,or if its a problem, a schedule 80 pvc slip coupling would have thicker sidewalls but the same id,IF you could find one of course. most normal pvc couplings will have a stop inside, if thats a problem look for whats known as a slip/repair coupling its exactly the same without the stop. hope this helps!
 
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KLS
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PostPosted: Fri Feb 15, 2013 1:20 pm    Post subject: Re: Need to rig up something... Reply to specific post Reply with quote

A regular 4" pipe coupling should be about perfect for you, to buy pipe to fit would be very expensive.
 
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Welding man
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PostPosted: Fri Feb 15, 2013 3:08 pm    Post subject: Re: Need to rig up something... Reply to specific post Reply with quote

Probably can't find one too easily but a 4 in socket weld coupling would work nicely.
 
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DiyDave
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PostPosted: Fri Feb 15, 2013 4:02 pm    Post subject: Re: Need to rig up something... Reply to specific post Reply with quote

I think I got 'er licked. Stopped by my friend, the starter and generator rebuilder, gonna try a generator housing. Gotta take the core apart, to see if she'll fit! I did hammer in 2 half t-posts, right into the wheel tracks, where the SOB backed up the bank, to KO the sign post. I cut them at a 45 degree angle, so they WILL flatten tires!
 
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