Here is a list of all the postings Mike has made in our forums. Click on a thread name to jump to the thread.
Thread: Solid Alcohol |
25/01/2010 10:59:44 |
I haven't used these things for ages, but I seem to recall that they burn with a rather sooty, yellow flame and a strong smell of paraffin. Just trying to be helpful, but at least an experiment would be cheap enough! |
Thread: In the Editor's workshop |
20/12/2009 14:03:13 |
Apologies to David; I made the mistake of commenting on something of which I have no knowledge, and I am happy to stand corrected. But where does he get his energy from, and can we all have some? |
20/12/2009 10:49:34 |
Hi Ian SC:
Yes, the publishing industry in general and specialist publications like ME and MEW have advanced since 1898. I have been a journalist, mainly involved with specialist publications, for the past 52 years, and the changes and improvements I have seen have been phenomenal.
Back in 1898 publishing, like all business, was hugely labour intensive, and I would belive that the staff of ME was very big compared to what it is now. Unlike now, people were cheap to employ.
Based on my own experience, I think our editor does a brilliant job in putting four magazines a month to press, and keeping an eye on our rantings on this website. One publication a month has always been quite enough for me! It would be unreasonable to expect him to deal with reader queries on a personal basis as well.
Nowadays we have the resources of the internet in general and this website in particular, and most queries seem to get a reply from an expert reader in hours rather than days. That IS progress! |
Thread: Lathe/Milling Machine combination |
20/12/2009 09:48:39 |
Hi Meyrick: I do like the big dials on your Super 7 - they would save me a lot of squinting through my reading specs at tiny figures and graduations! Some years ago I had to take some photographs for a book, using the ML7R I had at the time. The figures and graduations on the top slide and cross slide were raised rather than engraved, and almost invisible on black and white prints. Answer was to spray the dials matt black, then spin them in the chuck against a bit of fine wet-and-dry. The result was bright silver figures against a black background - perfect for the photos, and much easier on the eye for subsequent work. As I remember, I gave the same treatment to the leadscrew handwheel but, with the figures and graduations indented rather than raised, the result was black markings against a bright background. |
15/12/2009 16:45:02 |
Hi Geoff: I have no current experience of lathe/mill combinations, but for many years I used a Myford Super 7 with an Amolco milling attachment. Both machines were well-built and rigid, but the milling capacity was rarely what I needed. Even with Myford's optional long cross slide it was too small.
My thoughts nowadays would be that lathes are for turning, and tiny milling jobs using a vertical slide. Milling machines are for milling, and if I were you I would buy a separate mill.
|
Thread: Washers |
13/12/2009 16:06:55 |
Hi Meyrick
I was always taught to treat Nylocks as one-use nuts, and I had certainly never heard of restoring them by boiling. I can also recall a thing I think was called an Evans nut. It had a horizontal cut in the top which caused the top of the thread to distort slightly. This slight distortion provided a very tight grip on the thread of the bolt or stud. All this goes back to the pre-Loctite days. |
13/12/2009 11:21:36 |
A few months ago, when I needed some info on nut and bolt technology, I found a very useful website. Sod's Law being what it is, I forgot to bookmark it, and now can't find it!However, I remember they recommended flanged nuts and bolts rather than washers as they generate superior friction against the parts being held together, and are therefore far less likely to vibrate loose.
Also, no mention above of Nyloc nuts, in which I have great (maybe misplaced!) faith. Any thoughts from the experts?
Another also...Has anybody ever struggled to get a stuck sump plug out of a Mini? Popular rumour back in the 70s was that the thread form was such that it actually tightened under varying temperatures and vibration. Can this be true? |
Thread: In the Editor's workshop |
11/12/2009 14:25:23 |
Hi again, everybody:
Perhaps one of the answers might be a newcomers' Q&A page in ME. I run the technical side of the Q&A pages in a magazine covering the shooting sports, and it is very successful and well-read.
Of course, one of the problems in any magazine is lack of editorial space, and I am sure that David is bound by advertisement/editorial ratios dictated by his company's bean-counters. However, it is something I would like to see if space could be found.
|
10/12/2009 15:00:13 |
Sorry Ian (and David!), but I have to disagree. Part of my training as a specialist magazine journalist was that, however complex the subject, a complete newcomer should find something in every issue that he or she could easily understand. By this standard, David's articles are too complex.
Taken too far, of course, this involves a "dumbing down" of all articles, which is clearly undesirable. However, I do feel that ME should contain just one article in every issue which is understandable to the most raw newcomer. It would be a great pity if a would-be model engineer bought his first copy, only to find the complete content too complex to understand. That's the way to lose the regular readers of the future. |
Thread: Solid Alcohol |
29/11/2009 11:17:05 |
Hi everybody:
The solid "meths substitute" was called Meta Fuel. I think it was eventually withdrawn from sale because it was poisonous if mistaken for a sweet and swallowed. If you "Google" for it, you will find some details. |
Thread: Hot air and stirling engines |
24/11/2009 11:04:04 |
Hi Ian SC:
No, the Thermos is all stainless with no glass container. Still haven't got round to completely sawing it up. Thanks for the carbon/graphite info. |
23/11/2009 10:33:03 |
You guys are always looking for sources of stainless steel tube - preferably free! Well, the other day my stainless steel thermos flask finally gave up the ghost after 30 years so, out of curiosity, I sawed the bottom off. This leaves me with a length of stainless tube 160mm long, 96mm in diameter, and with a wall thickness of approx 1.1mm. The internal vessel (the bit that holds the coffee) is about 10mm less in diameter, and has a domed end. Don't know any more details because I haven't got around to sawing the neck off yet.
If you do find such a flask, be careful when you attack it with a hacksaw. It contains insulating material in the form of a fine, black powder which I believe to be either carbon or graphite.
Thought this might be a bit of useful info... |
Thread: Boiler making hearth |
08/11/2009 13:10:01 |
Thanks, Chris. Forgot to mention that the stones are carefully dried in a domestic oven first. However, if this stuff is sandstone, it is virtually impervious to water. |
08/11/2009 11:20:24 |
Not suitable for tony's purpose, or any big job, but I find the flat red stones picked up on my local beach on the Moray Firth reflect heat well, and don't crack. I'm no geologist, but I believe the material is old red sandstone. I "rescued" a rusty barbecue my neighbour was throwing out, packed a few of the stones in the bottom, and had a primitive but effective brazing hearth for nothing. |
Thread: Electric motors |
18/10/2009 10:01:11 |
Hi Ian:
I have just acquired a digital caliper for this very purpose. Although cheap, I am amazed at its accuracy, having checked it against a couple of good micrometers and a vernier gauge. This isn't exactly engineering standards room stuff, but quite good enough for my purpose.
Thanks to all who contributed to this thread. Sorry my picture didn't upload properly - there must be a trick to it that I haven't yet mastered. - Mike |
Thread: Drilling problem |
11/10/2009 09:06:57 |
Hi everybody:
Thanks to Meyrick for his very useful comments, and Chris for his support. This morning I have found a picture of a four-facet drill on a website - www.gadgetbuilder.com/DrillSharp.html if anyone else is interested.
Best wishes,
Mike |
10/10/2009 16:32:30 |
Hi Meyrick: The great thing about these forums is that you learn something new every day. I am only vaguely familiar with the concept of four-facet drill grinding, so I would be grateful if you could tell me the angles involved. I really ought to make myself a set of D-bits in the more popular sizes, too. Another excuse to spend all day in the workshop!
Best wishes,
Mike |
10/10/2009 12:04:23 |
Hi Robin: All of the above advice is good, and I guess it comes from much better engineers than me! However, there are some further tips for drilling true, parallel-sided holes. Firstly, did you push your 8mm drill through in one go, or did you drill a smaller pilot hole first? I'd have been tempted to drill a slightly smaller hole first (say Letter M or N or a near metric equivalent for 8mm), then go through very slowly with an 8mm drill bit and plenty of lubricant.
Also, all "as supplied" drill bits tend to drill slightly over size, because cutting pressure and torque makes the tips of the cutting edges splay slightly outwards. You can get around this by grinding a very slight radius on the tips.
This isn't my advice - I read it in Model Engineer well over 30 years ago - but it does work. It is very useful if you need an accurate hole but don't have the right size reamer. |
Thread: Electric motors |
19/09/2009 16:18:00 |
Hi everybody: I have now finished the construction of my light milling machine based on an old Amolco attachment left over from the days when I owned a Myford. I still don't have a motor, but at least I now know what I want.
Will this Heath Robinson arrangement be stiff enough? Well, a 30lb lateral force applied to the tool tip produces a movement of 0.0003" measured with an accurate dial gauge, so I have high hopes. One snag: the X-Y table is graduated in mm, while vertical movement is in inches. I shall have to sharpen up my maths!
|
Thread: Metric vs Imperial - Practical or Traditional? |
05/09/2009 15:51:29 |
I spent all my working life in the publishing industry, and used to design newspaper pages using another Imperial measurement - ems and points (72 points to an inch, I recall). When the industry changed to the metric standard, I remember going to our suppliers and asking for "a metric ruler about two feet long, please." Points, of course, still survive in the height of computer typefaces. Surprising the "metricate everything" mob haven't got their sticky fingers on that.
Even after more than 30 years working to metric standards, I still think in Imperial. Just an old fogey, maybe! |
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