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Graphite Yarn

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Fred Nightingale01/12/2010 21:34:16
19 forum posts
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I have been reading Mike Robinson's Thread on Graphite Yarn September 2009. I am currently restoring a two cylinder engine (See Pic)
There are eight seals on the pistons and valves in some cases up to an 1/8 inch thick. I am not sure what the material is, could it be Graphite String or even some type of felt. Anyone any ideas? if so where I could purchase such.
In Mike's thread people suggest using Plumbers tape. Two points here, one it would take a lot of tape, two surely String or Felt would retain some oil, hence lubricating the shaft
 
Any Ideas please
Fred
John Olsen02/12/2010 02:35:17
1294 forum posts
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Graphited yarn is the usual, and should be available from some of the trade suppliers...we can get it here in NZ although I suppose that won't help you much. I suspect it could be made if necessary from cotton yarn and graphite grease, I don't think it is exactly a hi tech space age material.
 
regards
John
 
JasonB02/12/2010 07:12:44
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25215 forum posts
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As you say plumbers PTFE tape would need a lot of rolls but most of the usual ME suppliers keep PTFE gland packing in various sizes as well as graphite yarn.
 
Try Bruce engineering, Blackgates, GLR
 
Jason
MichaelR02/12/2010 08:53:54
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528 forum posts
79 photos
Have a look at this site Here they have gland packing of all types and size, I have no connection with this company, just a satisfied customer.
 
Fred Nightingale02/12/2010 09:18:03
19 forum posts
8 photos
Thanks guys i,m now spoilt for choice
 
Thanks again Fred
KWIL02/12/2010 09:36:13
3681 forum posts
70 photos
MJ Engineering has graphite yarn round and square sections.
Richard Parsons03/12/2010 09:26:05
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645 forum posts
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Gland packing. Get some COTTON string (none of your old plastic stuff) pop it in a small pot with a load of Molybdenum die Sulphide based grease which has had a few drops of STP or Wynns oil additive stirred in to it.

Get the cotton string well impregnated and use. I have made several such stuffing boxes with success.

Stub Mandrel03/12/2010 21:17:11
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4318 forum posts
291 photos
1 articles
Thanks Richard,
 
I have both string and grease, but never thought of combining them.]
 
Neil

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