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8N 541-B Plunger part. dwg. needed

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Chuck A.

01-04-2003 08:20:58




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I tooled one of our CNC lathes to run some of these but I need to know the tolerances on the thread. Looks to be 27 tpi but we can't be sure. Does anybody have a drawing of the part?.

I would like to post a picture of the part but I don't know how. I looks real good so far. This is how it comes off the machine-complete with all of the turning and milling done. We would like to make other parts if the need is there.

Chuck A.

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Clark

01-04-2003 21:40:10




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 Re: 8N 541-B Plunger part. dwg. needed in reply to Chuck A., 01-04-2003 08:20:58  
I have an original one for sale with plates, seat, support, spring and yoke in my eBay store; N Tractors.



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D. R. White MN

01-04-2003 15:34:22




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 Re: 8N 541-B Plunger part. dwg. needed in reply to Chuck A., 01-04-2003 08:20:58  
Chuck, The part 8N 541-B has 24 tpi. But on some of the early 9&2 Ns it was 18 tpi. Not sure when the change took place. Hope this helps. Dave.



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Ed Gooding (VA)

01-04-2003 10:40:36




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 Re: 8N 541-B Plunger part. dwg. needed in reply to Chuck A., 01-04-2003 08:20:58  
Hey Chuck. Here's the three photos that you emailed me. Better late than never, I guess (grin):
Third Party Image

Third Party Image

Third Party Image

Best of luck with it..... Ed
'52 8N475798

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Les, TN

01-04-2003 10:30:49




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 Re: 8N 541-B Plunger part. dwg. needed in reply to Chuck A., 01-04-2003 08:20:58  
Don't have the part, don't even know where it goes. Don't have the drawing either, but would be happy to draw it up. We're running AutoCAD 2000 and have certified operators just waitin for something to do. ;-)



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Photo's (3) are in Parts Pieces Gallery

01-04-2003 10:09:51




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 Re: 8N 541-B Plunger part. dwg. needed in reply to Chuck A., 01-04-2003 08:20:58  
I put three in there, please take a look.

Chuck A.



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Willy-N

01-04-2003 10:15:55




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 Re: Re: 8N 541-B Plunger part. dwg. needed in reply to Photo's (3) are in Parts Pieces Gallery , 01-04-2003 10:09:51  
Nice looking part you made. Are you going to make a matching yoke also? It seems when they break the treaded tip stays in the yoke and next to impossable to remove. I have several for proof of that. It would be nice if they were the same threads as the original ones. I do not know what they are but you should be able to get that information off a old one. Mark H.



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try this==bj/8n/mt

01-04-2003 13:27:08




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 Re: Re: Re: 8N 541-B Plunger part. dwg. needed in reply to Willy-N, 01-04-2003 10:15:55  
One of the best forty bucks I have spent lately was on a set of left hand drill bits. Most of the time they bring the broken end without even using an "easy out". If you haven't tried them you should.

Your mileage may vary



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Chuck A.

01-04-2003 10:32:17




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 Re: Re: Re: 8N 541-B Plunger part. dwg. needed in reply to Willy-N, 01-04-2003 10:15:55  
Ya, I am heading out to the barn right now to unscrew the one (yoke) of the 8N and try it on this part. We will see. Chuck A.



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Willy-N

01-04-2003 09:44:02




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 Re: 8N 541-B Plunger part. dwg. needed in reply to Chuck A., 01-04-2003 08:20:58  
These parts are being made allready. I beleive the threads and not the same as the original ones. Are you using some kind of high grade steel? The original ones seem to be made of real good steel and are pretty strong. Mark H.



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Chuck A

01-04-2003 09:56:30




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 Re: Re: 8N 541-B Plunger part. dwg. needed in reply to Willy-N, 01-04-2003 09:44:02  
I think we will go with an alloy such as 41L40 of maybe a Stressproof - 1144. This should be strong enough. But really, the weak link is the plate and casting. These will let go way before the plunger. I have seen the proof!!. If you are doing any back work (backing up), you got to get the top link off the top and put it on the bottom so any force will not be tranmitted to the plate and casting. I will try to put some pictures up. Chuck A.

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ron

01-04-2003 09:17:40




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 Re: 8N 541-B Plunger part. dwg. needed in reply to Chuck A., 01-04-2003 08:20:58  
Chuck I can't help you with the thread specs. but you may have more business than you realize if you can reproduce some of this stuff. Good luck



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