high temperature lubrication

[Anthony KnightsParticipant @anthonyknights16741]

The main heating source in my house is a large multi-fuel stove. This has recently developed annoying squeaks on both doors. Can anyone suggest a suitable lubricant for this area which gets very hot (150 to 250 degrees C)

[Anthony KnightsParticipant @anthonyknights16741]

multi fuel stove

[KWILParticipant @kwil]

The two main dry lubricants are graphite and molybdenum disulfide. They offer lubrication at temperatures higher than liquid and oil-based lubricants operate. Dry lubricants are often used in applications such as locks or dry lubricated bearings. Such materials can operate up to 350 °C (662 °F) in oxidizing environments and even higher in reducing / non-oxidizing environments (molybdenum disulfide up to 1100 °C, 2012 °F). The low-friction characteristics of most dry lubricants are attributed to a layered structure on the molecular level with weak bonding between layers. Such layers are able to slide relative to each other with minimal applied force, thus giving them their low friction properties.

[Thor 🇳🇴Participant @thor]

Hi Anthony,

Could you use a graphite based lubricant. There are anti-sieze greases that can take very high temperatures, both copper based and aluminium based.

Thor

Edited By Thor on 05/03/2018 11:33:47

[Anthony KnightsParticipant @anthonyknights16741]

Thank you for the replies. I do have some graphite powder for locks somewhere in the workshop, so I'll give that a try.

[the artfull-codgerParticipant @theartfull-codger]

Don't know what type of stove you've got but I just use ordinary engine oil on my rayburn hinges for both firebox & ashpan doors & both oven doors & heat doesn't seem to bother them.

[Gordon WParticipant @gordonw]

I use the black graphite stove polish. Does well as a lubricant, also use it for exhaust bolts and spark plug threads.

[john fletcher 1Participant @johnfletcher1]

I use pencil and Tippex as a barrier to prevent Silver Solder going from its intended location. I hope you understand, its hard to put words to the problem. Would Black Graphite stove polish be as good or better ? Many years ago old fashioned plumbers would use "Plumbers Black" to prevent lead based solder going to where it wasn't wanted, the wiped joint looked very tidy, under ground cable jointers did the same. I have been trying to locate "Plumbers Black" for quite some time without success. I notice how neat some of the professional made boilers look when compared to home made ones, not to say that both work equally as well.Alot of expensive Silver Solder is wasted, what do the professionals boiler makers use ? John

[Clive HartlandParticipant @clivehartland94829]

If you can find some Coppereze it will do the job, i used it on the nuts on an exhaust manifold and some years later still good.

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