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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: Drilling holes in thin material
23/04/2022 17:23:01

Even with the cloth I would not hold the sheet metal with my hands as shown in the video. You only get one pair of hands and it's better not to rip them to shreds on a drilling machine.

Doug

Thread: Myford induction hardened beds
21/04/2022 10:14:03

When I bought my Speed 10 brand new from the original Myford many a long year ago I asked for the bed to be induction hardened. I was then told that this was not an option for the Speed 10 so I wonder if it was ever an option on the ML10 or Speed 10.

Thread: Rising costs of materials
08/04/2022 20:36:44

Ah well my personal scrap box must be worth a fortune now.

Doug

Thread: Screw cutting problem
17/03/2022 11:43:04

When it comes to screwcutting I think the set over technique is beneficial when using a small lathe. I have a Myford Speed 10 lathe and almost always use the top slide set over and the lathe seems happier this way. Chunkier lathes probably don't benefit to the same extent.

Doug

Thread: Recomendations for a Keyless Chuck?
16/01/2022 16:37:29

I have collected a few keyless ones over the years. Most are of the cheap type and all have worked well, but I did splash out and buy an Albrecht one with integral R8 arbor about ten years ago . The Albrecht one was on special offer at the time and cost about £100 but I have never regretted the purchase since it is so nice to use. There is something about quality tools that keep on giving joy long after you have forgotten the price.

Doug

Thread: Cutting up bits of metal
13/11/2021 16:31:14

My 6 by 4 bandsaw was quite put out when I read Clive's post to it and it has been sulking ever since. I have had the poor thing for many a long year and I know it has a number of faults but it has done a lot of work for me and seems pretty bombproof. With a decent blade it is a good compromise for a small workshop.

Doug

Thread: Anyone updated to Windows11 yet ?
02/11/2021 11:51:28

I was just on the point of getting a new laptop but will probably wait until I can get one with W11 installed. It should not be long before most are being shipped with W11.

Doug

Thread: Myford Gear Spacers
25/07/2021 15:59:10

I have experienced the same problem with my Myford Speed 10 and, like you, have just put up with it. I must get round to doing something similar for my peace of mind. I must say your handiwork looks very impressive, I am not sure mine will look quite so neat !

Doug

Thread: Adding thrust bearings to Myford Super 7 top and cross slides
10/07/2021 11:46:41
Posted by Martin Kyte on 05/07/2021 14:03:12:

I bet you don't Doug, they only sell the thrust kit for the ML7.

regards Martin

Ah, the one I got was for a Speed 10 which has the same fitting as the ML7, I did not realise the Super 7 was different.

Doug

05/07/2021 13:47:51

Arc Euro have a kit for this ( I bought mine ages ago so I hope they still have them ).

Doug

Thread: Bureaucracy with a tinge of Madness
25/06/2021 18:49:04

I tried to get my personal tax account access a year ago when I got the same letter about a refund. I also got blocked at the proof of identity stage and gave up in disgust, waited a number of weeks, then received a cheque in the post. A little later in the year I got another letter from them saying I had underpaid tax and they were going to reclaim it by adjusting the next tax code. I do wish they could do their sums properly and stop annoying us.

Doug

Thread: New here, just bought myself a Myford ML10 :)!
18/06/2021 18:08:53

Another very happy owner here (in my case a Speed 10 variant ). They are well made lathes and 20 odd years down the line my one is still as good as new. They are not perfect, but no lathe ever is, and this robust small machine will do a lot of things if one is realistic about size of work.

Doug

Thread: DC power supply question
15/06/2021 16:37:00

The transformer can be glued in place to avoid using the central hole but probably not a good idea to put the capacitor in there. I was forgetting that the outer case of the capacitor is aluminium and would probably get eddy currents in it. It was just a thought to save space but not one of my better thoughts.

Doug

Just noticed the above response about there being no magnetic field in the middle - you live and learn.

 

Edited By Douglas Johnston on 15/06/2021 16:40:14

15/06/2021 14:40:48

I am building a dc power supply for a project and am using a toroidal transformer along with an electrolytic smoothing capacitor and bridge rectifier. Now I want to make the whole thing as compact as possible and noticed that the capacitor fits very neatly inside the hole in the centre of the toroid but I worry that this might not be a good idea due to the magnetic field in that space. I know that there are people with electronic brains the size of planets on this forum so is this a good idea or a definite no-no ?

Doug

Thread: Radio controlled clocks
14/06/2021 11:45:58
Posted by John Haine on 13/06/2021 13:25:10:
Posted by Douglas Johnston on 13/06/2021 11:55:11:

I have one of those radio controlled clocks that refuses to lock on to the signal and slowly gains a few seconds a month. When the clocks change in October and April I have to take my clock to a high point in the back porch and leave it there for a day or two and it finally does the conversion. When it was new it worked fine for a number of years, then decided to annoy me for some reason.

Doug

If it's an MSF clock it may have stopped working when they moved the transmitter from Rugby (nearly in the centre of the UK) to Anthorn in Cumbria, so your signal level may have dropped.

That is interesting but since I live on the east coast of Scotland I am nearer the new transmitter, although there may be geographical considerations at work. I nearly threw the radio out when it first started to misbehave but tried placing it in a number of locations until I found one that worked.

Doug

13/06/2021 11:55:11

I have one of those radio controlled clocks that refuses to lock on to the signal and slowly gains a few seconds a month. When the clocks change in October and April I have to take my clock to a high point in the back porch and leave it there for a day or two and it finally does the conversion. When it was new it worked fine for a number of years, then decided to annoy me for some reason.

Doug

Thread: Mancave insulation
11/06/2021 13:18:56

I insulated a similar sized wooden shed about twenty years ago with the foil bubble wrap stuff and it does seem to work pretty well. One of the biggest benefits is keeping the inside temperature down in the summer. Before fitting the insulation the shed was unbearably hot in the summer but became much more pleasant after the insulation was fitted.

Doug

Thread: Lathe bed way cover
06/06/2021 20:45:48

I have used oven liner material to provide a swarf guard, it seems to stand up to hot chips very well and is very flexible.

Doug

Thread: R8 Help me please!
26/05/2021 18:57:26

Also check the diameter of the plain section at the top of the R8 (0.9495" in drawing above ) . I have bought a few R8 collets that would not go in my mill because that part was just a tad oversize for my machine (although still within the R8 spec ). Removing about 0.0005" from the diameter cured the problem.

Doug

Thread: New use for a slide rule
23/05/2021 11:00:48

When I did my engineering degree in the sixties a slide rule was one of the first things I had to buy. I too still have it although it has not been out of the box for a very long time. It was amazing what one could do with it but I would hate to go back to using it.

Doug

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