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Member postings for richardandtracy

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

Thread: computer q
21/06/2018 20:44:43

I have got data off an IDE drive with a USB caddy, cost, iirc, about £15. With a caddy the disc acts like a USB drive.

Regards

Richard.

Thread: CHINESE LATHE TOOLS AND ACCESSORIES
21/06/2018 20:42:06

All my tools bought in the last 5 years have bee bought direct from China. Only one item has been unusable and I got a refund. Everything else has been capable of much better work than I am. The e-bay seller I use most often is cskwin2015. Takes a month or so for delivery, but it's basically what Arc sell and at even better value for money.

Regards

Richard

Thread: Cataract lathe by Hardinge Bros
18/06/2018 21:46:41

Now, I have a c1915 fountain pen ( a Mabie Todd 'Swan No. 2 eyedropper' ) that works perfectly and I use regularly, but to see a c1912 lathe do the same would be quite something.

Regards,

Richard

Thread: PID Controller - MEW 269 - wrong connector
17/06/2018 21:14:14

After reading this thread, it seems less improbable that people died in the middle ages during arguments over whether it was 6 or 7 angels that could dance on a pinhead.

This really is like that argument, so abstruse as to be arguing for the sake of it. Just as pointless as the argument over some extra zeros appearing in the same article in MEW 269. Life happens. Just live with it. Or don't. Your choice, but is it really important enough to go round and round in circles about this sort of thing? There's a limit to how much pedantry is amusing and fun to read. I read most posts on this forum for the gems people come up with - and there are quite a few, but dilution of the gems still has to be waded through to find the gems., and, I dunno, this weekend has been a bad one for dilution.

Regards

Richard.

Edited By richardandtracy on 17/06/2018 21:19:57

Thread: Machinery's Handbook
15/06/2018 17:44:49

There are some interesting books there. But I wouldn't recommend downloading the 'Scientific Principles of Improvised Warfare and self defence' series, with its books on chemical and bacteriological warfare in addition to explosive manufacture, in the UK. Hardly likely to be treated differently from the banned 'Anarchists Cookbook' in legal terms.

I think it's a great resource, but tend to go for workshop books published 1920 or earlier. There will then be no copyright issues and they are also relate simpler technology, that doesn't seem out of place in my workshop.

Regards

Richard.

Thread: M3 blind thread in ali about 4mm thick. How?
15/06/2018 11:39:48

In such circumstances, provided there is space behind, how about a blind 'Rivnut'?

Regards,

Richard.

Thread: Machinery's Handbook
14/06/2018 21:31:55

As this is within copyright, I am not convinced it's completely legitimate.

Regards

Richard.

Thread: 'What LatheXXXXX sorry 3D Printer should I buy'
11/06/2018 14:06:23

Oh, is it out?

Been looking at the announcement banner line at the top of each page before looking in the shops for a new edition. I have the May one currently advertised.

Regards,

Richard.

Thread: Aldi bandsaw
11/06/2018 08:14:03

That little saw should be OK at up to 6mm aluminium & brass so long as you don't push it hard and realise the body of the saw will flex if you do. It may go thicker with care. The blade tpi should be such that you aim for a minimum of 3 teeth in the depth of the material. So, for 3mm (or 1/8" brass you're looking for a blade with 24 or more tpi. I doubt if you'll get much higher tpi, though I've not looked. So, this suggests that 3mm is probably the thinnest you should cut & expect full blade life. If you go thinner, the load per tooth will be higher & teeth will snap off more quickly. You will still cut the material, just reduce the blade life.

On my Clarke metal band saw I have cut sheet steel of .75mm with an 18 tpi blade. Had to be careful as occasionally the saw tooth in contact with the steel bent the sheet rather than cut it if I let the feed rate get too high, and the blade lost teeth fast, but it did the job quicker than any other tool I had available to me at the time.

Regards,

Richard.

Thread: Aerospece grade aluminium tubing
10/06/2018 21:19:03

You are unlikely to find much extruded section from 7075. 6082, instead, is available in quite a few sizes. Go for the T6 or T65xx temper.

Regards

Richard.

Thread: Carbide tool mirror finish interrupted cut
07/06/2018 21:45:17

What is the material - can't really tell from the photo. Is it aluminium?

If it is, I had the effect this evening myself. I speculated that in the uninterrupted cut the metal chips were getting warm enough to adhere to the tool tip on my carbide face mill. In the interrupted parts I speculated the tips cooled off and the chips never got hot enough to adhere. Testing this hypothesis, I reduced the feed rate a great deal, and ended up with a near mirror finish every cut thereafter. Even if the hypothesis was wrong, the result was good.

May be the case with you if it was aluminium.

Regards

Richard.

Thread: Plastic for machining threads in particular
07/06/2018 21:36:02

Murray's idea of candles is the one I always use. Particularly when considering a new design of pen.

In my pen making, almost exclusively on plastics, the deflection of plastics is a real pain, so much so that it's a pleasure to start on metals. I usually have to use a steel mandrel inside the pen bits to ensure that they don't deflect away from the cutting tool. The acrylic/polyester alloys I often use behave very much like Delrin, and while it threads well, it often needs a mandrel. Trying to get a good thread seems to throw out the rules for metal, and is often not a good indicator of feeds and speeds. And some things cut when you think they shouldn't (like blunt carbide inserts) and some don't when you think they should (sometimes sharp HSS doesn't work). I can find neither rhyme nor reason to it and just go with whatever works on the day.

Weight for weight, some small quantity exotic plastic pen blanks end up at £20,000 a ton or more.

Regards

Richard.

Thread: What did you do Today 2018
07/06/2018 14:01:44
Posted by Bazyle on 06/06/2018 23:13:14:

Checked every key I could find that might fit trailer padlock. Eventually gave up and instantly found it on car keys

I have done something similar. I spent 30 minutes looking for my glasses all round the house before I realised the reason I was able to look so diligently and easily was because I was wearing them. face 22

Regards,

Richard.

Thread: Slot Machines: How does a mechanical one arm bandit mechanism work?
06/06/2018 13:12:20

In my short and unprofitable experience of one-arm bandits, there is no connection whatsoever between the payout disc and the wheels that rotate.

Regards,

Richard.

Thread: What did you do Today 2018
06/06/2018 09:15:23

I have always wondered why people choose to run a marathon when mechanical assistance (like a bicycle) makes it so much more energy efficient. Saw one comparison that suggested you need to cycle 18 miles to burn the same energy as walking 1 mile. Shows the efficiency improvement to me. The power required may be somewhat higher though, as the speed tends to be considerably greater.

Regards,

Richard.

Thread: Lathe beginners book
06/06/2018 08:52:56

If you are up for a good bit of old, but not entirely outdated, reading, then take a look at the Internet Archive's range of Industrial Press (of 'Machinery's Handbook' fame) books mostly from the 1920's: **LINK** These books cover conventional machining techniques that have not changed one iota in the intervening years.

Regards,

Richard.

Thread: Flash Steam
04/06/2018 08:49:27

So, the code says what it can't be treated as, but does it say what it can be treated as? I'd imagine the answer is no...

Regards,

Richard.

Thread: Lathe beginners book
04/06/2018 08:43:36

This one by Harold Hall is pretty good (and available elsewhere) **LINK**

This one by Stan Bray is also good: **LINK**

Then there is also this: **LINK** Which can be borrowed from the internet archive. I have a paper copy re-printed by Lindsay Publications (now retired & all stock sold to 'Your Old Time Bookstore' here: **LINK**    )    , but it does not seem to be available as hard copy anymore.

Regards,

Richard.

Edited to remove spurious emoticon.

Edited By richardandtracy on 04/06/2018 08:45:13

Thread: Flash Steam
03/06/2018 20:55:47

What is the volume and design pressure? May fall within the same 2 bar.litre exemption that applies to aerosols ets, and therefore not be considered dangerous under the regs. Must say my knowledge of the regs is based on the 2002 regs, and in the six months I was designing the box they applied to, 4 of the seventy applicable regs changed. It is entirely possible that none of the regs applicable then, apply now. So more up to date advice would be better than mine.

Regards

Richard.

Thread: Are we Luddites?
30/05/2018 16:34:16

Mick,

I grew up in N Devon. I am a professional mechanical engineer, current industry - boxes (fancy metal ones). I have spent a few years as a stress engineer on aircraft interiors. No jobs in N Devon, so I moved to Kent where there were jobs. I literally got on my (motor)bike and went after a job. Did it in 1987. Pension prospect is negligible as it's a contribution one, not salary linked. When I joined the company there was a final salary scheme, but that went down the tube in 1990.

Regards,

Richard.

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