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Member postings for John Paton 1

Here is a list of all the postings John Paton 1 has made in our forums. Click on a thread name to jump to the thread.

Thread: Hi All.
22/07/2020 20:41:59
Posted by Phil McAvity on 20/07/2020 16:01:29:

Just a quick introduction from a former 'lurker' having just registered on the forum.

I'm new to model engineering although it's always been of interest to me, I often regret not taking the engineering path as a career having chosen the Army and Fire Service instead. I've always been interested in automobile mechanics with a sporadic sortie into the arena over the years and have returned more recently to RC Model aircraft now that time, family and financial commitments are less than in past years.

I plan on purchasing a mini lathe after realistically thinking about my needs and doing some research including online resources and reading the Nieil Wyatt book which led me to here.

Anyway, I doubt this will be my only post as I have too much to learn which even the magic of YouTube cannot fully explain!

Hi Phil, I seem to recall your namesake and another Scotsman Ben Doon featuring in Rag Mags back in the early 70s. Doubt you will see such publications ever again as most of the content would now now be taboo. Did you eventually qualify as a dentist?

Thread: Sourcing Belzona Fluid Metal Materials
07/07/2020 17:02:26

Good grief I didn’t know they were still in business. I last used their products in about 1976 and haven’t heard their name since despite being in the same area of work ever since!

Thread: Storage of files
12/06/2020 11:58:09

When rearranging your storage how about a quick spray paint of the handles to remind you which ones 'for best and brass' so that you don't mash them up on hard materials or clog them with alloy.

Thread: Jumping in
11/06/2020 15:12:45

Have a look at Geo Thomas book 'The Model engineers Workshop Manual' which has some excellent, well designed and very useful accessories in. He also gives such clear instructions on their manufacture that they serve as great beginner exercises too.

Thread: Damp proofing floor
11/06/2020 14:57:14

And watch out also for moisture coming up at the junction of the slab and the wall. Once you seal the top of the slab the concrete will end up being wetter than before so the moistire will tray and escape around the edges.

At best this will be a narrow band of damp but if the top of the floor slab is above the damp proof course in the wall the moisture can track across and migrate up the wall. Ideally the DPM on the floor should connect to the DPC in the wall. If it is at the same level as the floor surface then consider grinding a bit of a chase between the two , blow out any dust with an airline, prime with special primer and fill the crack with polysulphide mastic or other slightly resilient compound with good adhesive and water resistant properties.

If rising damp in your wall does not concern you (typically a bit of a tide line up the wall often with salt crystals) then don't worry about this detail but if you want paint to hang onto the walls or if there is timber there you will be well advised to look at the interconnection. It is a common problem and as Russ correclty points out there is considerable hydrostatic pressure which builds up one the slab is no longer able to 'breathe' to release the moisture.

The the detail you are adopting the slab will tend to have less thermal insulation value too but that is a minor consideration. Also use chemical (resin) anchors and non ferrous / stainless fixings if bolting down machinery etc as the floor will be relatively wet below the 'paint'.

All 'doable' but not as straightforward or reliable as having the DPM below the slab.

Thread: Look what I Found
19/05/2020 23:13:09

The asbestos was called 'Rawlplastic' if I remember correctly.

Thread: Shocking
15/05/2020 23:04:39

Anthony, It sounds like you are in luck - viewing the leaflet on the link Dave posted it clearly says that (unlike other cheap items) you can send items back to Clipsal's local rep for replacement.

So now you just need to identify their local Rep. You might have to lob it over to them to ensure appropriate distancing.

Edited By John Paton 1 on 15/05/2020 23:19:22

Thread: Sharpening Files
14/05/2020 15:57:41

Interesting stuff re 'sharpening'. Electrolytic with washing soda sounds worth a try as would be handy for controlled de-rusting of car parts too.

Re declogging files, I will mention pushing the end of a flat strip of 12x1mm steel across the file along the grain. This quickly serrates the end of the strip of steel with a tooth form which cleans out the grooves in the file. I bit of paraffin or WD40 helps too.

Sorry to all those well aware of the technique but may be useful for those who dont, especially if they have just loaded their best file with ally or even lead!

Thread: Oilite (type) bush fitting
14/05/2020 12:13:44

Hi Nick,

Just checking that you also know not to lubricate, drill or ream the Oilite without careful reference to makers instructions? (it is very easy to clog / 'smear' the surface and prevent the lubricant coming through)

I learned the hard way some years back!

Thread: Sort of a Straw Poll
12/05/2020 21:16:38

The reality is that if you don't have a workshop to spend time in you will need to keep going on cruises to keep yourself amused. Travel insurance alone will cost more than your lathe and mill so its a no brainer!

I believe that well bought and looked after, lathes and mills are as good as gold for holding their value.

Edited By John Paton 1 on 12/05/2020 21:16:53

Thread: Knurling Tool for medium (Harrison M300) size lathe
12/05/2020 13:56:45

Scissor type can also operate on slender components which would otherwise flex under lateral pressure

Also handy are the 'multi knurl head' type tool where you simply spin the head round to select the knurl pattern you require (saves time changing the wheels over) but these are the plunge type rather than scissor so better suited to heavier work.

Thread: BBC2 Flogit 11 May 2020
12/05/2020 12:27:22

I saw the original programme a little while back and think I saw the same or similar engine subsequently for sale on fleabay. (the oversize handwheel and oversquare cylinders stuck in my memory)

Thread: Crime rate
10/05/2020 18:48:40

And of course loads of fly tipping everywhere!

Thread: Adhesive for rubber sheet?
10/05/2020 18:45:46

I always use Evostick for rubber but don’t know if modern formulations are as good as the old stuff. It seems to almost vulcanise with the rubber.

just a thought - how about applying some rubber adhesive first and then Evostick onto that while still tacky?

Thread: Air supply to test run steam engine.
09/05/2020 14:47:29

I used to test run mine using a compressor stripped from a gash domestic refrigerator. The Stuart H10 ticked over nicely on it but the larger 'Real' engine was borderline until run in.

Thread: Old Codger
09/05/2020 14:36:11

Welcome aboard Haforn

I envy all you guys with apprenticeship background. Some of us have to try and work it out from first principles and what you mean by oval. To us it is perfectly round if you can get a pebble to pass through!

Like you I hate to see nicely engineered items languishing for want of a little TLC, even if they are neither use nor ornament (at least so in the eyes of the domestic controller!).

That said we do have a lovely little Victorian flypress in the sitting room as a nutcracker along with 3 steam engines a set of precision precious metal / jewel assay beam balance scales and a reel to reel tape recorder so perhaps i should be a tad careful what I say!!! They are all exemplars of design and/or workmanship and each have a little storyline attached.

Edited By John Paton 1 on 09/05/2020 14:36:48

Thread: Is this a Potts drill toolrest?
07/05/2020 18:46:14

Thanks guys, it looks like this has come off a Reliance jig then.

Taking up Clive's helpful offer I should be able to fabricate the bits needed to enable me to add this to my Kennet setup.

07/05/2020 10:45:40

drill grinding rest

I have a tool rest that I should like to use either by completing as an addition to bench grinder or incorporate in tooling for my Kennet cutter grinder.

Apart from the 'primary' angle between the spindle and the vee, the spindle is offset sideways by about 5 degrees (not measured) The rod protruding behind the vee has a flat machined on its side.

This appears very similar to the Potts drill grinding toolholder but appears subtly different to photos of the Potts  (more finely cast and unpainted).

Can anyone identify it more precisely and locate drawings for associated components please?

I welcome all suggestions from those who have experience of using the Potts attachment.

Edited By John Paton 1 on 07/05/2020 10:46:14

Edited By John Paton 1 on 07/05/2020 10:46:56

Edited By John Paton 1 on 07/05/2020 10:47:28

Thread: A Big Thank You to all Forum Members
07/05/2020 09:24:07

+1 for all of the above - a brilliant site, the knowledge and resource here never ceases to amaze me.

Appreciate what Neil and Jason do behind the scenes!!!

Thread: Things bought from ebay
03/05/2020 16:37:18
Posted by Phil P on 03/05/2020 11:37:30:

Unfortunately due to the current situation, the marketplace may well be flooded with bankrupt stock in the coming months. I dare say there will be lots of new old stock on ebay soon.

I work for a North Yorkshire engineering company and have so far been lucky in keeping my full time design engineering job and working from home. If it was not for the fact that we are supplying machines to support the "Ventilator Challenge UK" things might be very different.

**LINK**

Assuming I still have a job by then, my retirement is April 2022. Who knows what will happen in the months to come though.

Phil

Phil - Lets hope the UK has a bit of a rethink post Coronavirus and decides to use hi tech production at home so we can source more items from this side of the world. Maybe we can also start designing things to last at least 10 years and that the lockdown period will have reduced the demand for 'latest fad'.

Off to buy a litter of baby flying pigs ready for when lockdown is eased!.

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