Here is a list of all the postings steamdave has made in our forums. Click on a thread name to jump to the thread.
|Thread: Plastic Ban|
Posted by Trevorh on 19/04/2018 12:22:31:
and remember that to recycle paper has a massive carbon foot print almost as bad as Plastic recycling power wise
Years ago, all our old newspapers were given to the Cats & Dogs Home because they could sell it, but then one day they stopped accepting it. Could it have been because of the above statement, I wonder?
|Thread: Do you accept rave tool reviews as gospel?|
I wrote a short review on my new West German milling machine comparing it to a faithful Emco FB2 which it replaced and submitted it to MEW. 5 years on I still haven't changed my opinion.
It wasn't really complimentary to the new machine, which had been bought unseen but based on advertising and supposed West German super quality engineering.
Needless to say the article/letter was rejected and I thought at the time that it was a case of biting the hand that fed the dog, as the supplier was still an advertiser in MEW.
|Thread: Wind turbines get bigger and bigger|
I've been retired 6 years now, so things may have changed in the meantime.
|Thread: Hot air engine displacer material|
Following on from JB's suggestion, I turned up a new displacer piston from 316 stainless steel. I was aiming for 10 thou wall thickness, but it turned out to be more like 8 thou when finished and the top even less.
The original displacer weighed 93 gms and the new one was down to 34 gms - quite a saving, and hopefully the heat transfer will be a lot slower, enabling the Robinson to run for a while without external cooling.
In the end, I decided against a regenerative displacer, as this one seems to be a great improvement on the original brass one.
Edited By steamdave on 01/04/2018 10:28:23
|Thread: Cut knurling|
Over on HMEM there was a discussion about cut knurling tools a while back which you may care to read.
|Thread: First Milling Machine|
...Changing the drawbar. My mill has one of those drawbars that use differential threads. What a pain in the a... I'm screwing the darn thing for ages to release the tool and if the new tool has a slightly different MT length, I have to be very careful that there is enough thread in the new tool because next time the drawbar unscrews from it, the tool might not be ejected but the drawbar is separated from the tool.
|Thread: Hot air engine displacer material|
Thanks for the replies, gents.
The engine in question is the Polly version of the Robinson hot air engine; they supply a brass spinning for the displacer piston. I have bored this out to give about 10 thou wall thickness but as you say JB, brass conducts too much heat, hence the search for a better solution. I may give the stainless a go using your suggestion. If I can't get success that way, I'll revert to the mild steel.
Being a member of HMEM, I don't visit MEM except in leap years. (Can't see many pics of projects there and there's no point in joining just to repeat the few posts I put on the other site.)
I want to make a regenerative displacer for a hot air engine, size approx 1-1/2" dia x 1-1/2" high. Heat source will hopefully be a tea light, but probably end up being a mini gas ring to make the engine work.
Materials available are:
So, the question is: which of the materials available to me would the knowledgeable use?
|Thread: Myford Super 7 Lathe Instruction Manual|
There are many Yahoo groups for particular machine tools and there may well be a download of the required manual in the files section. There certainly are for the Myford and Harrison lathes.
Groups will require joining to access the files.
Edited By steamdave on 05/03/2018 11:53:24
|Thread: Do I have too many ideas and interests?|
My sentiments exactly!
|Thread: Chucks 3 or 4 jaw for general use.|
3 jaw Gri-Tru chuck for me for general work, then in order of preference depending on the work:
|Thread: Solder masking|
Thanks for the replies to my question.
It's good to know that solvent based Tippex is still available, but 'peelable solder mask' sounds an interesting suggestion.
It is well known that solvent based Tippex (is it still available?) or ordinary pencil lead provide a good mask to prevent silver solder from going where it is not wanted. There may well be other masking agents that I'm not aware of.
Is there any similar mask that can be applied to a job using ordinary tin/lead or electrical solder?
|Thread: Myford ml7 lathe problems|
Are you a member of the Yahoo group for Myford lathes? If not, you should consider joining; there are lots of knowledgeable folk there who would be bale to help you (not saying they aren't knowledgeable here, also).
|Thread: What quality vs cost considerations drives your buying?|
My experience of buying an expensive 'made in West Germany' milling machine has taut me that cost is not always synonymous with quality.
The Sieg type copies of my machine were about 1/3 the cost but are probably just as good, maybe even better in some respects to what I have. Problem for me is that I couldn't go down to a local tool retailer and 'twiddle the knobs', but relied on advertising hype (If W.German, it must be best) to select my purchase.
|Thread: Myford M type half nut Thread form?|
Have you thought about about a plastic set of half nuts? There is a good write up in the following link:
Not tried it myself, but may give you food for thought and comments from others.
Edited By steamdave on 13/02/2018 12:08:46
|Thread: TOOLING SURVEY|
With regard to Tangential tooling, I came across a picture some time ago of a Carboloy tangential tool that used round carbide bits.
My copy of this is my most used general purpose tool. It has all the same benefits as the usual square HSS designs , but requires less sharpening. The carbide I use is the shank of a broken 3mm end mill.
So, which section do I cast my vote?
Carrying on from SOD Dave:
Some years ago, statistics showed that 10% of all road accidents occurred at speeds greater than 70 mph. That would mean it is safer to drive at speeds of more than 70 mph, because only 10% of accidents happen then.
Statistics can prove anything you want.
|Thread: replacement for Dewhurst switch|
For the cost of postage I can give you two Dewhurst switches, from which you should be able to make one good one. I went down the 1 - 3phase VFD route some time ago without any regrets.
Just send me a private message if you would like them.
|Thread: jointing sheet|
Just as an aside, really: the pig iron polishers (ships' engineers) used to use old navigation charts, wiped in oil for gaskets, mostly for pumps and the like, 'tis true but also for the steam auxiliaries when nothing else was to hand.
The reference to the engineers was purely in jest, in case any former ones take exception. I learned lots from them.
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