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Member postings for Douglas Johnston

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

Thread: For the latest in PC fashion! (Anyone here with a Master's Degree?)
28/10/2020 10:27:09

Just because we have used certain terms all our lives and don't think about them as being linked to things like slavery, perhaps we should move away from some of the old terms which clearly cause offence to others.


Thread: Gone to the great workshop in the sky
27/10/2020 19:45:23

Another idea is to use a local general auction house. My local one has an auction every fortnight and there is always a good selection of tools for sale. I am often very surprised by the high prices people are willing to pay for such stuff. The advantage is that you don't need to know what things are since the public can make their mind up on viewing days before the auction. The downside can be the charges made by the auction house, but on the other hand heavy items don't need to be delivered to a buyer.


Thread: Adjustable angle plate
27/10/2020 11:00:08
Posted by John Hinkley on 27/10/2020 09:15:04:

You may be averse to purchasing imported goods, for whatever reason, but they can be made to function accurately, if that is your concern, as shown by Stefan Gotteswinter in his short video series on YouTube, starting here.

Just what sort of accuracy are you looking for? And to what use will it be put?


Last year I did exactly what John suggested and reworked one of the Chinese imports after seeing the youtube by Stefan Gotteswinter. In its original condition the device was pretty rough although the castings were quite substantial. It took a lot of work to turn it into the proverbial silk purse but made an interesting project. The end result was well worth the effort for me as I was doing it for my own amusement, but could never be considered a practical solution for most people due to the time it took to complete.


Thread: Putting the clocks back
26/10/2020 11:27:48

I have a couple of these radio controlled clocks which worked fine for a few years then one of them started to slowly gain about two seconds a month and refused to change time when the clocks changed. I tried moving the clock into various locations and changed the batteries but nothing would make it work properly. On the point of throwing it out I tried one last location on the roof of my outside workshop. Next morning the clock had adjusted itself correctly, but I have to do this every 6 months to keep the right time.


Thread: Kerr's Minature railway closing
04/10/2020 11:32:43

So sad to read this since I live only a dozen miles from the railway and had many wonderful rides on it as a child. I hope someone buys the track and trains to set up elsewhere so future generations can benefit from it. As if we needed more bad news crying


Thread: Threading trouble
03/10/2020 12:06:53

A hand crank is a real asset when threading. I nearly always do it that way, it is much more relaxing than doing it under power. A bit of a pain for long threads, but they can often be done under power. Carbide thread cutting inserts don't seem to mind the slow cutting speed.


Thread: What cleaning solution?
03/10/2020 10:54:39

Lidl in the UK sell 1 litre tins of universal solvent at a cheap price. I think it is mainly acetone and probably makes a good solvent for hammerite paint since branded hammerite thinners cost an arm and a leg.


Thread: Where's this rust come from ?
01/10/2020 11:10:22

I store any items like V blocks in individual small plastic containers. It is not a perfect solution but does keep them safe from mechanical damage and rust. The little plastic pots sold in supermarkets for storing food are perfect and not expensive.


Thread: interest renewed
19/09/2020 15:24:04
Posted by Peter Etherington 2 on 19/09/2020 09:49:10:

dscf1856.jpgMany thanks for all the advice, I shall have to give this some serious thought. The work I will be doing on my lathe is only light (making 16mm scale steam locos) so a vertical slide might just get the work done without having to go cap in hand to she who must be obeyed for the best part of a grand for a mill. The thought never crossed my mind about chucking. Once again thanks for your time and valuable information. Peter. PS I dont think I have room for a mill in the shed.

Edited By Peter Etherington 2 on 19/09/2020 09:53:27

Very impressive use of space, puts my shed to shame. Is that a canoe in the rafters?


Thread: scraping technique
18/09/2020 09:47:11

Looks like I have been doing things the right way then. I just wondered if there was any special reason why bluing the part rather than the surface plate is advocated at all by some people.


17/09/2020 10:34:51

There is some confusion in my mind about the best technique for scraping a flat surface. I have in the past put the blue dye on a surface plate and then carefully moved the object to be tested over the surface plate. On lifting the item off the plate I scrape the spots which have picked up the blue dye.

Other people seem to put the blue dye on the surface to be checked, leaving the surface plate clean, then move the item over the clean surface plate. On lifting the item the scraping takes place on the areas where the dye has been removed.

I suppose both techniques amount to the same thing but is there any reason to use one technique over the other?


Thread: Myford speed10 / ml10 apron disassembly
16/09/2020 14:32:57

As Clive has said there is not a lot involved in dismantling the carriage. The allen screws are imperial so use the correct key. I dismantle mine every year or two and clean out any swarf that has managed to get trapped under the carriage. I then run a very fine slip stone over the top of the flat bed to remove any minor dings before reassembly. Slideway oil seems to work fine on the bed and leadscrew. I found swarf on the leadscrew was a problem before I fitted a cover to protect it.


Thread: varifocals
31/08/2020 15:36:14

Like others I have been wearing varifocals for years. At the start it took just a couple of days for the eyes (or is it the brain? ) to adjust to them. I do however find a problem in the workshop with close things like machine dials etc. and find myself removing the specs for clearer vision. Perhaps my prescription needs changing but I won't be going anywhere near an optician while the covid virus is still a problem. Roll on the vaccine!


Thread: Can anyone supply a lead for grub screws
23/08/2020 13:21:48

I have often cut and drilled stainless ones, since all the ones I have used were never hardened. They are not as robust as hardened steel ones but usually fine and they don't rust.


Thread: decent 4 jaw chuck to fit myford speed 10?
16/08/2020 14:53:29

A 5" independent chuck was what I got with my Speed 10 lathe and that would seem to be the best size for the lathe. I also have a light weight 6" one which I have often also used on the lathe to hold larger work although one has to be careful since the outside diameter just clears the lathe bed.


Thread: Diamond Lap for sharpening Brazed TC tools
06/08/2020 11:39:55

How long before the crocodile clips touch, but the idea is great.


Thread: The making of Steel Balls
05/08/2020 11:58:21

No wonder quality bearings are so expensive. So many corners to cut with cheaper bearings. The balls from quality bearings make excellent references for checking micrometers etc.


Thread: Using Counterbores
22/07/2020 14:23:17

I had the same problem with a couple of my counterbores in that I did not have the correct size drill before using the counterbore. I simply solved the problem by holding the counterbore in an accurate collet chuck and used a sharp polished carbide cutter insert to reduce the diameter of the front part of the counterbore. Worked a treat on the hard HSS and left a mirror finish. It never fails to amaze me what you can do with this type of carbide insert.


Thread: Stuck oil filter
09/07/2020 11:20:27
Posted by Douglas Johnston on 12/09/2019 13:32:18:


ps I will report back in a year after the next oil change If we are all still here!

Edited By Douglas Johnston on 12/09/2019 13:38:16


I did say last year I would report back so here goes. I spent ages trying to remove the oil filter using as many techniques and tools that I had available and failed to budge the filter. Moving on to this year I thought I would make a special tool to complete the task. After a good rummage in my collection of bits and pieces I unearthed the outer casing of an ancient car dynamo which had just the right inner diameter to slip over the oil filter.

The casing had a wall thickness of about 6mm which was ideal for tapping two rings of 8mm holes for grub screws. The top end was fitted with a 75mm diameter disc of 10mm thick steel which had a 1/2 inch square hole put in to accept a ratchet bar. By screwing in as many grub screws as I could reach I got a great grip on the filter casing and the filter was easily removed. Job finally done!




Edited By Douglas Johnston on 09/07/2020 11:23:32

Thread: Yipee the F1 is back on
28/06/2020 20:49:09

My only hope is if C4 in UK shows highlights since I don't have Sky.


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