lubricating a screw ?

simonfraser

simonfraser

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tomorrow i shall be putting 6 screws my ply epoxy boat, just above the water line, not the easiest location to work on whilst she is in the water

i have practiced on a scrap bit of wood, using silicone grease to make the job easier

but, why not just put some silicone sealant in the hole and use that as a lubricant ?

any reason why not, if so tell me please !
 
Silicone is not compatible with paint finishes, and is extremely difficult to clean off surfaces. If you intend to paint over or fill the screw holes do not use silicone grease or sealant.
With appropriate pilot holes you should not have to lubricate the screws. Can you give us a bit more detail about what you are doing?
 
if your screwing into wood and you want some lube. use boiled linseed oil this should be compatible with the paint unless you are using cellulose type paint,if the paint is thinned by turps linseed will be fine.boiled linseed oil is v. cheap,and will also protect the wood.If youve got dirty oily hands its good for that also, your hands will be like a babies bottom!!
 
Re: nedmin

Just a point, if you do use linseed oil, never use natural fibre rags like cotton or lint to mop up spillages, wipe your hands etc. They react and spontaneously combust.(it does say this in the small print on the label, but who reads that)?
 
Re: nedmin

[ QUOTE ]
Just a point, if you do use linseed oil, never use natural fibre rags like cotton or lint to mop up spillages, wipe your hands etc. They react and spontaneously combust.(it does say this in the small print on the label, but who reads that)?

[/ QUOTE ]

Scaremonger!!

You can use cotton/lint rags to wipe up spillages. Just don't leave them in the boat afterwards - they might spontaneously combust and set your boat on fire.
Just dispose of them properly once you've mopped up the spill.
 
Re: nedmin

[ QUOTE ]
Just a point, if you do use linseed oil, never use natural fibre rags like cotton or lint to mop up spillages, wipe your hands etc. They react and spontaneously combust

[/ QUOTE ]

WOW! Rags used for cleaning up spillages of linseed oil (and one or two other things for that matter) must be disposed of carefully after use and not stored as they can, and do, spontaneously combust. I think you will find that is a bit of an exaggeration to suggest that cotton rags coming coming into contact with linseed oil will spontaneously combust instantaneously.

Oxidation of the oil produces some heat, if that cannot escape then the rag warms up, that accelerates the rate of reaction producing more heat more quickly until it does start to burn but it is not something that occurs instantaneously although I cannot put a timescale on it. If the rag is not bundled up so that the heat is retained then it does not happen.

It has been known to happen with linen contaminated with cooking oil and I believe polyurethane varnishes are another likely cause. I have personally known it to happen to rag used for mopping up a small chemical spill but it was some hours later that the fire started.
 
Re: duncanmack

Good point, where would you suggest to put this potentially volatile mix?In the bin? Somebody elses bin? Wot do you consider proper disposal?
 
Re: nedmin

Never heard of linseed oil spontaneously combusting think your getting mixed up with danish oil which will combust.cricketers used to leave their cricket bats in linseed oil for long periods to soak in the wood.
 
Re: duncanmack

Our Insurance Co insist that we put ALL contaminated rags in a metal bin outside the premises every night.

If they're happy.........

/forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif
 
Re: nedmin

As far as I know, cricket bats are wooden, not cotton. Enough of this anyway. I was`nt scaremongering, I was just trying to helpout, like I would hope someone could help me if I had a prob. Are all forums like this, i am a new user and dont know any different. should I go back to luirking?
 
Re: nedmin

Guess what he used to caress the oil onto the bat?

Don't worry about people having a go. It's a sort of sport and means nothing. Welcome to the place, and thank you for trying to help.
 
Re: nedmin

would hope someone could help me if I had a prob. Are all forums like this, i am a new user and dont know any different. should I go back to luirking?

Of course we would all help if you had a problem! I just did - you thought you would go up in flames if you used linseed oil with cotton/lint cloths!
Don't go back to lurking. The forumites can get a bit lively but they won't bite your head off (most wont anyway) It's all good fun. Welcome to the mad world here!
 
Re: nedmin

Just to add my bit, I was at a lecture and demonstration a few wks ago held by the RNLI, and one of the safety points the speaker made was about disposing of used oily rags, and the possibility of rags used to clean up some types of spillages spontaniousley combusting.
So my view is, Dont take a chance, get rid of them, not your boat.
 
Re: nedmin

No stick around,lots of sensible posts are flamed,it comes with the territory!

But one day somebody oiling a cricket bat will put the cloth in the bin,burn their house down and you will be able to refer back to this post and say "told you".
 
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