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Member postings for Swarf Maker

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

Thread: Antikythera Mechanism
09/01/2022 19:08:40

I have just found this article in 'Scientific American'. Apologies if this has been linked to before.

https://www.scientificamerican.com/article/an-ancient-greek-astronomical-calculation-machine-reveals-new-secrets/

Scientific American

Thread: Mc Donald Model tractor
08/01/2022 12:38:17

Unfortunately real cork is getting difficult to obtain and is now rarely used for wine bottles. However, you may find that a home brewing shop will stock real cork stoppers and your solution would be to slice those into suitable segments, glue them in place and sand to an even thickness. They will certainly provide a longer service life and, provided that you use a suitable adhesive, they will be immune to oil contamination. Cork is used this way in full scale motorcycle clutches with oil baths!

08/01/2022 10:28:57

I have no idea how much of an issue it might be in this situation Fred, but you appear to have used reconstituted cork rather than 'real' cork. The 'glue and granules' format of that friction surface may just fall apart in use.

Thread: How much is a life worth
22/11/2021 00:11:37
Posted by Grindstone Cowboy on 21/11/2021 18:09:03:

Just spotted this article about an award-winning dashboard. Not entirely convinced...

Rob

Links to https://interestingengineering.com/shy-car-dashboard-only-appears-when-needed

The major problem with all of these touch screen controls and displays is that they require the user to look at them in order to 'touch' the appropriate part of the screen to fulfil a function. That of itself is a distraction, and often a lengthy one in terms of safety.

The modern trend of ignoring the value of the tactile sense is an extremely retrograde step.

In my car, with conventional knobs and switches, I don't have to divert my eyes from the driving task in order to operate any essential car function.

The radio and SatNav on the other hand has a touch screen and to use that I have to divert my attention to the centre console and look at where to place a finger in order to achieve any simple task. That is simply not appropriate, or good enough, for safe driving.

Thread: Not the time to be complacent about Covid
16/11/2021 13:49:34

I found this to be an interesting and informative article. Amongst other things it summarises how the virus utilises mutation in order to remain an effective threat to us, its hosts: Coronavirus - one step ahead


https://nautil.us/issue/108/change/how-the-coronavirus-stays-one-step-ahead-of-us?utm_source=pocket-newtab-global-en-GB

Edited By Swarf Maker on 16/11/2021 13:51:36

Edited By Swarf Maker on 16/11/2021 13:51:51

Thread: Elliott 10M restoration.
05/11/2021 11:11:32

You may find this a little clearer.  Click on the image and it will enlarge.elliott 10m chart.jpg

Edited By Swarf Maker on 05/11/2021 11:12:33

Thread: Pulling cog off Albion Type C gearbox
01/11/2021 22:54:29

Could you show some picture of the arrangement please Ian Whittaker, just to make the arrangement clear and useful to pass on to others if needed?

29/10/2021 23:56:30

I doubt that Albion did anything radically different to any of their other gearboxes - or indeed other gearbox manufacturers. The sprocket will be on splines on the output shaft which is integral with the top gear - together known as a 'sleeve' gear. The sleeve gear will carry a normal RH thread, thus retaining the final drive sprocket. It is normal for there to be a locking washer that mates with the splines and allows a segment of the periphery to be turned and locked against the sprocket nut. The nut on your gearbox has been replaced with the battered ring but should still be threaded - unless something dire has occurred to the sleeve gear in which case this ring may be locked in place by deforming things or with some adhesive type locking compound. A ring without features to enable it to be 'spannered' does seem a bit strange though.

Thread: Aircraft General Discussion
25/06/2021 23:52:47

Well it would certainly be good to know what I have said to offend Andrew Tinsley! I have flown out of Lasham for many years and the aircraft servicing company that operates there have mainly been focussed on Boeing aircraft for very many years. In that time many 727's have flown in and out, some of which are privately owned by the likes of pop groups and high flying (literally) personages. A 'heavy' departed there on Wednesday and flew directly overhead, heading south, so Petersfield would be almost directly ahead. By the time I had gone out to see what was making the racket it was a tail-end view and appeared to be a 727, and with that amount of noise, not unusual for the type! Since I can only report what I believe to be true in that hope that I might have helped, in this case Nigel McBurney1, I am surprised to have this categorised as B/S by a member who had not been a respondent to the query that I was answering.

It would have been much more useful if Andrew Tinsley could explain what my error of observation had been and then we all could have shared in and learnt from his knowledge.

25/06/2021 21:02:42

I think that what you actually saw Nigel, was a 727 out of Lasham. A particularly noisy example left the airfield and headed south over Petersfield on Wednesday, staying significantly lower than normal. It was the only local large aircraft movement that day.

Thread: Another Stolen Loco
10/06/2021 19:08:35

Another sad story - keep a lookout.  This is a BBC news item  **LINK**

Edited By Swarf Maker on 10/06/2021 19:09:16

Thread: (bicycle) thread identification?
12/04/2021 00:15:52

Poor Mr Whitworth must be positively squirming in his grave.

Thread: Moving warco gh universal into workshop
21/03/2021 18:54:12

Remember that the chuck guard must be down and operating its safety switch. Gear/belt cover also needs to be in place?

Thread: How do I get the bearings out of this?
08/03/2021 17:30:01

It has to be simple. The disc with three holes is likely there to retain the bearing in the housing. Tap the far end of the shaft with a copper mallet and the shaft will likely exit, bringing the bearing and that ring with it. once out and clear of the housing the other bearing can be removed from the opposite end by judicious use of a drift through the housing. Do the first exploratory taps and see what starts to move to confirm.

Thread: A milling anomaly
24/02/2021 16:21:17

Hi Tug, Check that the small centre that the threaded end of the cutter locates into, is still in the chuck. Also have a look to see if the threaded length on the failed cutter is shorter than expected. Both faults will stop the locking action from taking effect.

Thread: Hermes in action - Lost parcel ?
28/01/2021 13:59:25

Need more information to support that photo - and as for Hermes in the title, one of those parcels is labelled YODEL - a competitor to Hermes!

Thread: What air compressor should I buy?
28/12/2020 19:30:02

There is some cross-over between the standards used by couplers. There are couplers made by PCL that will connect with Euro, ISO B12 and XF according to Air Technique Ltd. Have a look at https://www.air-compressorsdirect.co.uk/pcl-coupling/multi-fit-couplings

Thread: Our 10 Day workshop "respite"
30/11/2020 00:53:19

What a treat those picture are Joseph. Something to lift the spirits of those of us locked down on a dreary day. Thank you!

Thread: Arduino Pendulum Clock Design - Comments Welcome
30/10/2020 11:58:18

Another parameter for you to consider regarding unexpected perturbations - earth tremors?

Thread: EN8
07/08/2020 11:33:53

I find it worrying when people with little metallurgical or manufacturing knowledge choose to make safety critical items for their vehicles. In this case 'c wastell' has chosen to ask for much needed advice and for this he is to be applauded.

There is a slight problem in that we have no knowledge of the duty that this wheel spindle will be required to fulfil, and no knowledge of its design parameters.

We all should exercise our 'duty of care' when offering advice, particularly when we know so little about the actual requirement. So whilst EN16T, now better identified as 605M36, is likely to be the preferred specification if this is for a simple spindle supporting individual bearings, there may be other limitations that need to be considered first.

So please 'c wastell', let us know exactly what it is that advice is sought for. And furthermore, when that advice is given, please ensure that you have adequate assurance from the supplier that the material is truly what has been specified. You may well not find the material locally so don't limit yourself to whatever the nearest stockist may have.

Edited By Swarf Maker on 07/08/2020 11:34:58

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