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Member postings for Kiwi Bloke

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

Thread: Coronavirus
07/04/2020 12:15:16
Posted by Hopper on 07/04/2020 12:00:50:
Posted by Kiwi Bloke on 07/04/2020 11:28:00:

So, if domestic (and feral) cats can be infected, as big cats seem to be, what then? Millions of moggies acting as a resevoir of infection isn't a nice prospect - until everyone is immunised.

There are no recorded incidents of feline to human transmission. Don't panic.

Well, not yet perhaps. If it's the same virus in humans and cats, transmission will occur. Why should species-jumps be one-way? I don't panic easily, just trying to think ahead.

Thread: Borehole pressure vessel change
07/04/2020 12:06:27

Ah, OK, perhaps I'm being slow, and we're not at cross-purposes. If the water has escaped from the bladder, to part-fill the tank, I now understand the possibility of 50 litres remaining in the tank, but not on the floor. It should be possible to drain the tank down to the level of the water connection.

You say the air valve is low-lying. Can you pump up the vessel and let water out via the air valve - several times? With enough puff behind it, it should only take half the morning...

Edited By Kiwi Bloke on 07/04/2020 12:08:36

Thread: What is it with the fit of old slotted screws?!
07/04/2020 11:56:27

Some well-made firearms use(d) very narrow-slotted screws that look 'wrong' to engineers. Actually, it's a great idea. The turnscrew (approved jargon) used is chosen to fit. Its blade has a very shallow taper. Because the slot is relatively deep, the blade doesn't bottom out, so it wedges itself in the slot and doesn't slip out, ruining all the expensively-engraved action work. Safer than parallel-ground blades.

Thread: Borehole pressure vessel change
07/04/2020 11:48:24

Are we at cross-purposes? Swapping a tank isn't difficult - provided some thoughtless person hasn't built it into an inaccessible location... The 100 litre tanks here are an easy one-man lift.

A single water connection is standard. The pressure vessel is Tee'd off the pipe between the pump and the services supplied. There's a one-way valve in the system to prevent back-flow into the pump, when it's not running.

Thread: Coronavirus
07/04/2020 11:28:00

So, if domestic (and feral) cats can be infected, as big cats seem to be, what then? Millions of moggies acting as a resevoir of infection isn't a nice prospect - until everyone is immunised.

Thread: Borehole pressure vessel change
07/04/2020 11:23:14

If it's like the thousands all around NZ, typically in rural properties, there's a valve to which a foot-pump is connected, to pressurise the vessel. Even if the water-containing bladder is leaky, the vessel will still pressurise, of course. Close off the inflow (from the pump) and open a tap on the outflow. It may be necessary to pump more than you expect, to get all the water out. If you're really unlucky, the collapsing bladder could possibly block the outflow, or it could collapse in a way that doesn't allow it to empty fully, but I think this is unlikely. Forgive me if you have a completely different arrangement.

Did ours (a big one!) a couple of months ago. Typical of NZ, the new, Italian-made vessel cost many times the UK price (in real terms).

Thread: How do I drill this hole
05/04/2020 10:26:24

The suspension brackets certainly limit your options. Pity, because Mick B1's suggested method was better than mine, I think. However the option of using the lathe as an horizontal borer remains. Surely a set-up on the boring table (cross slide) should be more rigid than a skyscraper on the milling table. There's so many ways to skin a cat...

As Bill Chugg suggests, please could you post pix of your chosen set-up? You've got us on tenterhooks.

Edited By Kiwi Bloke on 05/04/2020 10:30:57

Thread: 2TB USB drives.
03/04/2020 22:55:34

Possibly advertised for the benefit of crooked re-sellers?

Thread: How do I drill this hole
03/04/2020 21:00:34

Long drills tend to wander, given the chance, so shortest possible drill is best. Use the lathe. Centre-pop each end of axle and set work between centres. Fix to cross slide with packing, whatever (improvise!) and clamps.

You now have intended entry and exit points coaxial with lathe's axis (having remembered to adjust tailstock's alignment...). Fix drill in headstock chuck/collet and drill half way.

Reverse the job, repeat.

If the hole isn't good enough, you could then consider making a small-diameter between-centres boring bar and taking very light cuts.

Thread: Academia.edu
02/04/2020 10:11:45

Absolutely unacceptable! Gurgle = spawn of Satan!

If one of your contacts were to experience something unpleasant as a result of contact details being released, who is legally responsible for the privacy breach - you or Gurgle?

A 'temporary' email account, with no contacts, etc. is useful...

If you look at the 'permissions' required by most Android (another of Gurgle's data-mining methods) apps, you really can't download any without a degree of fear.

Edited By Kiwi Bloke on 02/04/2020 10:14:34

Thread: Boring tool
02/04/2020 09:31:38
Posted by Kiwi Bloke on 02/04/2020 07:52:18:

...

[lots of edits - it's all coming back, slowly (wibble-wobble, wibble-wobble). Virtual prize awarded for anyone who can identify what I'm referencing in parenthesis in the previous sentence!]

I meant that sentence, Michael...

02/04/2020 07:52:18

Designed by Arnold Throp, who was the founder of Dore engineering, who provided a kit for it. Nothing to do with ETW, as far as I know. It's shown in use in Throp's book 'Vertical Milling in the Home Workshop and discussed by GH Thomas in his 'The Model Engineers (sic) Workshop Manual'.

The 'Dore-Westbury' milling machine was Throp's re-design of the earlier Wesbury machine. Dore Eng. produced kits, in which the larger pieces were ready-machined, and added the (optional?) back-gear. Castings for the original design were also available, from Woking Precision, IIRC.

[lots of edits - it's all coming back, slowly (wibble-wobble, wibble-wobble). Virtual prize awarded for anyone who can identify what I'm referencing in parenthesis in the previous sentence!]

Edited By Kiwi Bloke on 02/04/2020 07:58:23

Edited By Kiwi Bloke on 02/04/2020 08:06:18

Edited By Kiwi Bloke on 02/04/2020 08:09:11

Thread: Source of Small Extension Springs
02/04/2020 01:28:03

Old typewriters?

Thread: Coronavirus
02/04/2020 01:26:22

Well, it's great that some people with 3-D printers are doing their bit, but 3-D printing is so slow. It should be possible to knock out face shields by the thousand with laser and/or water jet cutters. Transparent plastic from packaging firms and foam plastic/rubber for the headband/former.

Hope product liability and medical device testing, etc. is relaxed, otherwise, should any device procured from a 'novel' source fail and be a possible cause of a medical problem, the lawyers will jump in...

01/04/2020 10:23:11

RMA - agreed. Funny that the 'money markets' are still going, apparently without impediment... Must say something about priorities.

I think I read recently that the tubes were still running in London. Is that true? Criminal idiocy if it is.

Edited By Kiwi Bloke on 01/04/2020 10:25:28

Thread: Inlaying silver in brass.
01/04/2020 10:20:32

My understanding (and it's book knowledge only, without personal experience) is that in a/the standard technique, the edges of the undercut groove are raised a little, when the undercut is formed, then worked down again, as the inlay is applied, further securing the inlay. Fine silver seems to be standard, because of its ductility, whereas sterling silver is less ductile. I haven't come across mention of cold hammer-welding of silver, although gold does, of course.

Having said that, would a standard engineering approach not work? Can you roll the wire into a square-section ring? A ring 19mm dia, of nearly 2mm square section, is quite substantial. If you can make the ring truly circular, with a well-butted join, or soldered, couldn't you make it an interference fit, where the OD of the ring is a gnat's whatsit greater than the OD of the receiving groove? It wouldn't be terrifically 'strong', but you haven't indicated what this is for. If it's just for looking at, strength is a minor consideration.

Thread: Coronavirus
01/04/2020 09:07:42

Dave,

I'm very glad to hear that your daughter is recovering and I hope you remain uninfected.

There are too many unknowns. It isn't yet known what degree of immunity will be developed by people who recover, thus there is no certainty that repeat infections won't occur. It seems that viable viruses can be recovered from the faeces of people who have recovered and it's not yet known for how long. Even virus-free people can act as intermediaries in an infection chain, especially when infection is frequently via surface contamination.

Sorry to pour cold water on what is an optimistic time for you both, but I would suggest your daughter exercisse caution and delays a return to the outside world for a bit. And also keep up your own high level of household precautions.

30/03/2020 10:05:49

Dave, best wishes to you both.

Thread: I Hate Brass!
29/03/2020 23:32:54

Posted by Howard Lewis on 18/03/2020 12:57:22:

...

The danger with brass is that if you get a particle in the eye, it has to be removed physically, rather than with a magnet like ferrous particles. So even if the fact that it sprays swarf everywhere is not insuperable, do wear some form of eye protection!

Howard

Yes!

It's probably been said here before (by me?), but it bears repetition. Copper and (many of?) its alloys in the eye is a disaster. Cu chemically destroys eyes quickly. Get those safety spectacles on! If you think there's any possibility that a bit has penetrated your eye, get to A&E without delay.

Thread: Myford Super 7
29/03/2020 23:23:49

I'm pretty sure that you can find a manual for the Super 7 on the 'net (I haven't looked for one, having an old-tech printed one here...). Let's assume that there is indeed nothing broken or missing, and that it's all gone together as intended.

Clutch adjustment is by loosening the hex nut in the middle of the bronze 'clutch plate' at the left end of the assembly. This allows the central 'push rod' to be turned relative to the clutch plate, into which it is threaded. Clockwise reduces clutch clearance. Between 45 and 90 degrees of anticlockwise rotation of the push rod from the 'no-clearance' position gives the right amount of movement to disengage.

So, move the clutch lever to the disengaged position (push rod moves to the left, against spring pressure), adjust the pushrod until there's clutch contact, than back it off (anti-clockwise) between 45 and 90 degrees, to give clearance. Lock with nut.

'Push rod' is possibly misleading terminology. The clutch compression spring bears on the larger-diameter 'head' of the rod (pushing the rod to the right), thus pulling the bronze plate to the right, into engagement. The 'push' is to disengage the clutch.

Hope this helps.

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