|Johan Crous||31/01/2013 20:01:16|
38 forum posts
I have seen countless examples where aluminium was used in stead of steel and it worked. Not so hard but working.
|David Littlewood||31/01/2013 20:08:51|
|533 forum posts|
There are hundreds of varieties of brass, with a very wide range of properties. Some of them have a tensile strength higher than mild steel; some are better than others for casting. A quick Google search threw up this useful looking resource:
I'm sure a more careful search would throw up many other informative sources.
Hope that may help.
|Michael Gilligan||31/01/2013 21:05:10|
16352 forum posts
Many of the "Ornamental Turning" lathes, such as Holtzapffel, made extensive use of Brass for slideways, etc.
However; as David says, there are many grades of Brass; so there is no easy answer.
As for DIY casting ... please take care.
If I understand correctly; very little Brass Casting is now done in this Country -- simply because of the related Health problems. (I will see if I can find some detail, and post later)
This thread is worth reading.
Edited By Michael Gilligan on 31/01/2013 21:11:49
|Stub Mandrel||01/02/2013 21:06:52|
4311 forum posts
I made a gib strip out of brass I had bought to make free-hobbed gears from. It was so hard the first gear came out one tooth short, and the second one tooth extra, I gave up and got some engraving brass hich was fine for gears.
As I say the hard brass went into a gib strip - it was amazingly difficult stuff to work, but I was able to preserve the mirror finish on the bearing surface, which I then finished by flatting it with very fine abrasive paper. the result was silky smooth in use and has shownno visible wear.
|Ian S C||02/02/2013 10:26:03|
7468 forum posts
One of the main problems is the cost of brass over as a block of hot rolled steel.
Brass is (well it was a yr or so ago) cast in Christchurch, although I had to change foundries, as the one I used to use now only does ferrous castings. Every yr or two I get a hundred or so Horse Brasses cast for the souvenir shop at our museum. I made 8 patterns. Ian S C
|458 forum posts|
If it looks like brass but is d@mn hard it could well be Aluminium Bronze. The colour is almost the same. I once gave up drilling a 3 mm hole in this stuff (yes I used a good drill...)
|Stub Mandrel||02/02/2013 19:44:42|
4311 forum posts
Not so much hard, as nasty to work - it grabs toolbits and repels all but brand new files.
It was 1/4" thick CZ108 from CES, I re-ordered the leaded engariving brass CZ120 which was much easier to work.
|Gordon W||03/02/2013 10:30:39|
|2011 forum posts|
While clearing up in the w/shop I found a few old nozzles from oxy-acetaline and oxy-propane cutters. They look like bronze of some sort, does anyone know what? IE will they be any use for ,say, bearing bushes ? Or do I just weigh em in?
|Les Jones 1||03/02/2013 11:06:34|
|2161 forum posts|
|Gordon W||03/02/2013 14:54:48|
|2011 forum posts|
Thanks Les, I've cleaned one up and you are right, of course, the burning does put a nice colour on tho'. They'll come in for something.
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