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Member postings for ANDY CAWLEY

Here is a list of all the postings ANDY CAWLEY has made in our forums. Click on a thread name to jump to the thread.

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Thread: Tempering Salts
18/07/2012 07:31:15

Hi Springbok,

yes that is the sort of thing I'm looking for. In the commercial heat treating world they use a bath of molten salts held at a tempering temperature into which the item to be tempered is immersed. It is a much more controllable method than the oxide colour method used by amateurs such as our selves.

17/07/2012 21:09:38

Does anybody know where I can get a small quantity , say 2 or 3 kilos of tempering salts. Googling does not seem to throw up a likely supplier.

Thread: Vintage Steel Specification
05/04/2012 09:48:09

I have an Alford and Adler swivel pin drawing from 1924 which in the material specification box it shows “ubas” (the “u” could possibly be an “a&rdquo.
In the main body of the drawing it says “Case harden to usual C.H.S. specification”
I have a good idea what steel to use for the application but I would love to know what “ubas” actually stands for.

Has anybody out there got the answer?

Thread: Storage of machine tools
02/01/2012 22:41:17
Is there any chance of a little permently applied warmth. I understand a 40 watt light bulb will supply enough warmth to a sizeable machine tool to keep condensation at bay. I believe small low wattage heaters are available.
This is second hand knowledge picked up from another forum, I pass it on for what it is worth.
Thread: Blacking
02/01/2012 21:46:45
No, cos you are only heating to about 500 C to harden you have to go to above 750C. Long explanation could follow but I suggest you read it up when the time is appropriate..
Thread: HTS Bolts
03/02/2011 18:40:25
Sorry to be pedantic about this but the elastic stretch of steel bolts regardless of their tensile will be the same. Non elastic stretch or permanent deformation will just occur soo ner in a lower tensile bolt.
 
Also every time I use my ancient Bridgeport I curse the chap who, in the past, just used ordinary sized hex bolt heads in the tee slots and made a real dogs breakfast of the said slots.
Thread: Emgineering Glues
09/09/2009 23:53:24
There is a good article on the subject in the current issue of Model Engineers Workshop.
<< First < Prev 5 6 7 8 9 10
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