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Member postings for tractionengine42

Here is a list of all the postings tractionengine42 has made in our forums. Click on a thread name to jump to the thread.

Thread: What Did You Do Today 2019
02/04/2019 10:32:17


Could be hydrogen embrittlement, higher strength/hardness materials are more susceptible. I'm not an expert but basically the material absorbs hydrogen atoms which results in material becoming very susceptible to brittle failure and unable to sustain it's normal/design loads.

It can be cured buy heating the component over several hours at something like 200 deg but must be done very soon after the hydrogen embrittlement occurs, If not done in time then the heat treatment is not effective.

It's normal practice for High tensile components to have hydrogen enbrittlement prevention heat treatment done after various plating processes etc were the material may have absorbed hydrogen atoms.


Edited By tractionengine42 on 02/04/2019 10:33:17

Thread: Huloo from North East Scotland
17/03/2019 10:25:53

Hi Roy

I'm not that far from you, just west of Alford.

Good to hear of another enthusiast in the NE Scotland. I am a member of the Aberdeen Model Engineering Society.

I did set up a face book page "here" as a place for local enthusiasts to communicate, but so far not done much to promote it, the little promotion I did didn't get any interest, but am keeping the page open for a while longer and maybe enough people may become interested in time.

Anyway, enjoy your new mill, it's exiting getting new tools and learning new skills, and it's great to share our home shop/modeling activity.


Thread: What did you do Today 2018
07/12/2018 13:58:44

Andrew, I'm using a 0.2mm/20 deg point carbide engraving cutter at 20k rpm.


07/12/2018 10:59:07

Another small name plate done on my home converted cnc mill. Very happy with this result.

10 v plate.jpg


Thread: Mach 3 doesnt see UC100 contoller
07/12/2018 10:43:44

I'm using a uc300 with mach 3 on a windows 7 desktop computer. I had consistent problems with the UC300 disconnecting in the middle of a job and tried all sorts to resolve it. Then i realised the problem only occurred when I had the radio on, never had any problem since having the radio off while the cnc is running.

At first I thought it might be coincidence but after many months of reliable operation it seems to have been the problem. Presumably the radio is putting out some electrical noise.

Probably not related to your problem but thought I'd mention it.



Edited By tractionengine42 on 07/12/2018 10:49:12

Thread: What did you do Today 2018
25/11/2018 20:11:46

Thanks Neil, A blob of paint on the '8' will be too much, probably a tiny spec of paint will fix it, LOL.

BTW, that brick work on your model also looks fantastic.


25/11/2018 17:35:39

Great looking engine Neil.

Today I was going to etch a small name plate for my Stuart 10V, I had good success previously with etching. Then decided give it a go on my home converted cnc mill, Very happy with the result though some improvements can be made for next time, done with a 0.2mm pcb carbide engraving cutter at 20k rpm.

!0v name plate.jpg


09/11/2018 19:42:14

I have a futrure project that requires spiral milling so today I have been busy converting a Drummond lathe head stock into a spiral milling attachment for my mill.

The first photo shows the head stock straight from the lathe. I stripped it down and machines the pulley casting, (which includes a gear for the back gear) then shrunk fitted and aluminium sleeve. The Aluminium sleeve was turned and milled to take a T5 timing belt, see second photo.

The plan is to use timing belts to get a drive from the mill lead screw. I think using the Drummond lathe head stock has benefits in that I can drive it in its high gear or in back gear. In backgear it gives me a 9:1 reduction not an ideal figure. The first job will require a 10:1 , so will use the back gear and have a small reduction from the lead screw using toothed belts.

The last photo shows the Drummond head stock converted, now I need to arrange for an intermediate shaft between the mill lead screw and the Drummond lathe head stock, that's tomorrows job, details to follow.

headstock 1.jpg

timing pulley milling.jpg

timing pulley finished.jpg

headstock modified..jpg


08/11/2018 16:58:23
Posted by Circlip on 05/11/2018 10:14:02:

Nigel, Triumph 5T adaptors, Is the head normally threaded or did that have to be done too? Venom Clubman has a pushed in spigot (REALLY bad idea).

Regards Ian.

Yes, as Thiagussi says, the exhaust ports on this 1959 Triumph 5T cylinder head are threaded, they are 1-1/2" x 16tpi with 55 deg included angle.


Thread: laying up an engine
05/11/2018 19:51:48

Apparently Lanolin is a good rust preventative. for steel parts.

Presumably it's a copper boiler so I don't think should have a problem.

My 3" Allchin has a steel boiler, for winter storage I'm filling it to the brim with water + boiler treatment added at a concentration used for a 1st steaming when new. and protected from frost. I'm intending trying lanolin for bear steel parts.

If possible keep it in a warm place.

Hope that's of some help.

How about bees wax on bear steel parts?


Edited By tractionengine42 on 05/11/2018 19:54:28

Thread: Double diamond tool
04/11/2018 17:08:42

Here's another interesting variant by ROBRENZ a master at his art.


Thread: The right sort of paint!
04/11/2018 12:58:18

I used Precision Paints enamel on my 3" scale traction engine cleading which has 4mm insulation. I've only steamed it for 1 year but no problems with the paint. However, if you can get the heat resistant paint mentioned above in the colour you want then go with that.


Thread: What did you do Today 2018
03/11/2018 18:05:45

Not today but earlier in the week I made some exhaust adapters for a 1959 Triumph 5T motor bike being restored locally, I nice pleasurable turning job apart from them being in 316 st st. I was amazed when they fitted the cylinder head perfectly. Plus I made a short video of the process.

exhaust adaptors.jpg


Thread: The Workshop Progress thread 2018
01/11/2018 23:00:25

Thanks Paul,

The needles cost less than £2 the set and all the other materials were just some off cuts so a very cheap and quick project, the practice takes longer than the building.

I missed a digit off the last link, here it is again.



01/11/2018 20:35:45


I have a Stuart 10V i'd like to paint and do a bit of lining on. I've done some lining with an old fashioned draughtsman pen but wanted to try a lining pen. I found some 'blunt dispensing needles' and used them to make a lining pen. My initial trials have given some pretty good results though I need to learn more of the technique. I made some video's to share the idea if anyone should be interested. 

lining pen and nibs









Edited By tractionengine42 on 01/11/2018 20:44:57

Thread: Oxy Acetylene or Oxy Propane?
01/10/2018 13:10:46

I use a rent free oxy bottle for my oxy propane set-up, in the long run I believe it will be more economical and would recommend giving this consideration. You pay a refundable deposit on the bottle, a oxy refill costs around £35 for a 9 litre bottle. My local auto spares supplies rent free welding gas and oxy. For hobby use you can expect one 9 or 10 litre oxy bottle to last a considerable length of time, after 1 year or so I've used 1/4 bottle. I mostly use my oxy propane for small fabrications and hot metal forming but have used it alongside a propane torch to silver solder a copper vertical boiler.

I did have an oxy propane set using disposable cylinders but found it too expensive to use regularly, this was some time ago though.


Thread: HQS taps and dies - anyone tried them?
22/07/2018 23:50:37

HQS taps and dies are carbon steel, I couldn't testify as to the steel grade or quality but HQS taps that I have bought have looked ok and worked well on a range of materials. Cheaper carbon steel taps have in some cases been ok and other cases terrible.

IMO for a tap or die that isn't to be used often then buying HQS will be a better guarantee of a tap or die that will cut a good thread otherwise, buy cheaper carbon steel taps ahd dies from and reputable supplier who will replace a faulty product.



Edited By tractionengine42 on 22/07/2018 23:51:34

Thread: Getting a brass plaque engraved
09/07/2018 09:34:25

Many cam software programs will import a pdf file, I've done a number of name plates this way using Vectric 2dCut cam software. Most home CNC machinists will be able to import a number of different formats. Personally I find pdf very convenient and with accurate results.


Thread: WIN 10 again!
08/04/2018 05:27:38

Had the same problem 3 times on my Acer desktop after a win10 update. First 2 times got into repair mode, 3rd time I could do nothing and had to reinstall win10 from an ISO image then reinstall all my sofwares and files.

Mght he coinsidence but after changing the internet settings to "metered connection" there are significantly less updates and have had no more problems. I had come to hate win10 but since the last reinstall and making this setting change a year ago I'v been ok with it

My better half has hard similar experiences on a Toshiba laptop.

I find Britec on YouTube to be a good source of help for dealing with win10.


Edited By tractionengine42 on 08/04/2018 05:28:14

Edited By tractionengine42 on 08/04/2018 05:29:14

Thread: Grinding carbide inserts
10/01/2018 10:42:20


I use a carbide insert parting tool. Initially I found it did not cut as well as expected and I didn't have much confidence using it . Recently, after very lightly grinding the front rake of the parting insert on a diamond wheel, I found it cut a great deal better and without any problems.


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