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Member postings for Gerhard Novak

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

Thread: Boiler making torch
10/03/2022 10:29:45

The map gas set from toolstation is very good, the burners are easy to change, but I do not think they are good enough for a boiler. A very small one probably. I think the map set is more for silver soldering smaller parts together. Also: as you hold the bottle all the time your arm may get tired (Or minimum mine does....).

On a boiler the heat will "run away" because of the good thermal conductivity of copper. So you need plenty of power. The Sievert pro 86/88 burner has 7.7kW, this together with some thermal insulation (fire bricks) should do the job. Problem at the moment is to get a propane bottle. Some kind of shortage on the market.

Edited By Gerhard Novak on 10/03/2022 10:30:55

Thread: Plasma cutter at lidl
08/03/2022 18:02:23

I think the whole 13A / 16A discussion comes from the fact that the German standard (Schuko) plugs are rated 16A. 1.5mm2 is the right cross section for that. For some reason standard plugs in the UK are rated 13A.

As Frances IoM said further up the 13A fuse is to protect the flexibe cable from the socket to the device - the cable is the same in whole Europe (even the UK is no longer in the EU we still are a member of CENELEC and will be in the future, and we use flexible cables according to BS EN 50525 - which are harmonised all over Europe)

The type H05VV-F 3G1.5 according to BS EN 50525-2.11 is rated 16A. So it will not overheat.

Thread: Gerhard's Lady Steph
07/03/2022 20:49:43

Alan,

just looked at your album - the Lady Stephanie looks good, and there is not much missing. The flywheel you are using has many more spokes than the one I got with the casting set.. Is it a replacement?

07/03/2022 18:00:17

Thanks for that Mark. There is not much there yet, but so far I am happy with it.

There are some drawings for Lady Stephanie on the Internet as well, it is a slightly larger version using no castings. And it is metric. (I always have a calculator next to me as I cannot get my head around the imperial system)

The one on the internet is from De Waal.

For sure a nice machine, but I do like working with castings, having built 3 Stuart models over the years.

Looking forward to hear or see more from your build.

02/03/2022 20:42:34

Let's have some peace in the forum, there is enough weapon rattling in the world around us.

Was at MK metals for some bright steel bars, so I can start the main bearing pedestal and the crankshaft. Nice to have a local shop and some good chat. And the prices are better than on the internet.

Thread: Number stamps quality.
28/02/2022 10:18:01

Great hint Derek

Think I have to make one of these jigs...

28/02/2022 10:17:49

Great hint Derek

Think I have to make one of these jigs...

Thread: Gerhard's Lady Steph
27/02/2022 22:03:22

Short update. The upper columns and their pedestal pieces are ready. Of course I needed to put all I have together. The screws on the top will of course be changed to something nicer.

 

img20220227214508.jpg

The entablature was slightly warped, but easy to correct. What is interesting is the change of hardness in the casting. You find everything from soft as butter to hard as a rock...

 

img20220227214735.jpg

Edited By Gerhard Novak on 27/02/2022 22:06:27

20/02/2022 22:05:45

Played with the upper columns today, produced one exactly according to Tubal Canes plan (16 flutes) but I do not like it. the flutes are touching, you get a sharp, cog wheel like structure. May be this is like it was in the past, the flutes were made for strengthening the cast column.

I made one with 10 flutes to see how it looks.

On the photo: square, 16, 10 flutes

img20220220213404.jpg

I prefer the 10 flute look, so I made six of those. Enough flute milling. My right hand hurts...
Holding the workpiece was a bit tricky and needed a few shims. The top of the column needs to be horizontal, but the column has a taper... I saw some clever tools for that, but I don't have one. So I held it on one side in the chuck of the rotary table and on the other side in a small machine vice. Disadvantage is that you have to open the vice every time you need to change the position for the next flute...

Anyway, they are done. The ends on both sides are still too long, I made them longer to avoid problems of running with the clamping nut of the mill into the chuck of the rotary table.

img20220220213656.jpg

Thread: Here's an interesting one
18/02/2022 07:50:17

Machine looks pretty much like my DB8 - just the dial counter is missing. And I paid £1250 for it... And yes, it could do with a 1.5hp motor (the DB8 has 750W or 1 hp)...

Thread: Gerhard's Lady Steph
16/02/2022 21:26:16

Well - to Bernard and all the others giving good advice... If I would use my glasses and start with the tap no 1 and not no2 I probably woudn't have broken it....

Anyway. today was the day of the cylinder pedestral. I am quite far, a few holes and threads are missing. But the main dimensions are there and the important flange and hole are done. Should be all straight and level. There are a few traces from the milling which I will file away.

Happy modelling!

img20220216212118.jpg

Edited By Gerhard Novak on 16/02/2022 21:27:12

16/02/2022 11:44:28

Jim,

In the meantime I corrcted the misprint. Also I am aware that standard WD-40 is not a lubricant.

What I am speaking about is WD-40 specialist multi purpose cutting oil. This is not the standard WD-40 everybody has in its tool box.

Gerhard

16/02/2022 10:41:05

Huub and Bob, I actually used WD40 cutting oil. This stuff, even not very thick, does make a change.

Anyway. The postman was there a few minutes ago, and my treasure arrived. Most of the back issues are photo copies, but 4 of them are still the original ones! So now I have something to read...

img20220216103058.jpg

Edited By Gerhard Novak on 16/02/2022 10:41:47

Edited By Gerhard Novak on 16/02/2022 10:42:55

15/02/2022 22:00:17

Thanks a lot Bob, There is a file (excel) at TEE publishing which contains the contents of every article. So in principle I had it, but the list you sent is more detailed, so I am sure it will help.

Thread: Learn to use a metal lathe
15/02/2022 21:55:08

Would be happy to show you the basics of a lathe, but I think I am a bit too far away (Near Milton Keynes). In case you are interested write a PM.

Online tutorials are fine, but I think one or two hours spent under supervision would help as a start. After that you can follow what has been suggested. Actually I look into Blondihacks videos myself from time to time, as there are some ideas which are helpful. By the way I learned working with a lathe at a technical high school in the 70th in Vienna.

The choice of a lathe - depends on what you want to make. I have a Chinese 8inch lathe and I am very happy with it. But it may be too big for some jobs, and you need a dedicated place for it. With 125kg it is not so easy to move the beast out of the way...

And of course welcome to the forum.

Thread: Gerhard's Lady Steph
15/02/2022 10:49:38

Again thanks to Bob, was a great hint, will get all 15 issues direct from TEE publishing (some as photocopies) for 36£50.

Thread: HOPPY - hit and miss engine
14/02/2022 20:14:33

Looks good. Looking forward to see it running!

Thread: Gerhard's Lady Steph
14/02/2022 20:09:30

Bob,

Thanks for the link, I will try it.

14/02/2022 12:53:49

Thanks Bob,

I did know that. Question is how to get hold of them...

Thread: Plasma cutter at lidl
13/02/2022 16:22:38

Unfortunately not enough space... Just changed workshop, but there is a limit for everything. I just could convince my wife that we need an arbor press (also handy for her jewellery making), but as we share the workshop no plasma cutter wil come...

Need to find a modeller near by who has one... wink

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