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graphite rod

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bricky24/11/2020 18:34:32
471 forum posts
48 photos

What grade of graphite is required to make a piston rod and piston for a Jan Ridders coffee cup engine.Also is it easy to machine and thread.Whiich supplier is the best to get it from.

Frank

pgk pgk24/11/2020 19:46:15
2035 forum posts
290 photos

When i made my Ridders heat engine I just bought a graphite rod from ebay. It worked fine rom the viewpoint fo threading and turning - just very messy (tape the vacuum hose near the cutter)

pgk

Roderick Jenkins24/11/2020 19:46:18
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2009 forum posts
533 photos

From my experience, if you are going to thread then dense, fine grain is best. Noggin End have a good selection:

**LINK**

HTH,

Rod

bricky24/11/2020 21:41:16
471 forum posts
48 photos

Thank you both for the information ,I now know what to order and do.

Frank

mgnbuk24/11/2020 22:38:54
910 forum posts
65 photos

Drop me a pm with your address & an idea of what size lump you need & I'll have a word with my MD. (I work for his graphite supply & machining company).

He has been amenable in the past to me raiding the oddments box for a suitable piece of fine grained isostatic graphite for this purpose. All that has been asked in return is that the recipent sends in a picture of the finished product.

He provides the graphite & I pay the postage - make a donation to charity if you would like, but not compulsory !

Nigel B.

Mike Poole24/11/2020 22:55:03
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Moderator
2857 forum posts
67 photos

The filthiest workshop I have ever been in was our EDM department, everything was covered in black dust and combined with the foul smelling oil from the EDM machines it made a hellhole, I have never missed repairing those machines. I hope you and your workshop recover from the graphite experience.

Mike

Edited By Mike Poole on 24/11/2020 22:56:51

Mike Poole25/11/2020 11:51:44
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Moderator
2857 forum posts
67 photos

Many vacuum cleaners pull the air through the motor so be sure that the very fine dust will stay in the bag and not get deposited in the motor, I doubt a one off job will cause a problem but if you use a lot of graphite then it might be worth checking the motor for any deposits.

Mike

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