Member postings for derek hall 1

Well if it takes a gale in this country to blow over an artic lorry, then a ship of that size becomes a wonderful "sail" to a mere breeze of 30mph.

If the ships hull has been damaged by the simple analogy of a simply supported beam at both ends, the weight of the unsupported midship could be catastrophic to this vessel.

Regards to all

Derek

I worked for Anglian Water for 15 odd years in the "lumpy water" side doing mech and elec maintenance from the late 1970's. I watched the program last night and it bought back many memories!...pity there is no smelly vision!

Get that black sludge on your hands and you couldn't get rid of the smell despite washing your hands loads of time....only way we could eat our sandwiches at lunch time was put aftershave on our hands...looking back believe it or not it was a great job!

Interesting for me was that the actual process is still unchanged from when I worked for AW 40 odd years ago...

Regards to all

Derek

Wow thats really interesting Tug,

I have never used JB Weld and in fact never heard of it until it was mentioned in here.

I understand that it can be filed but is it something that can be machined as well?

Kind regards

Derek

On the Danfoss thermostatic valves I have fitted over the last few years, the instructions with the valve show that you have the flexibility to fit them on either flow or return. You configure the valve to do this.

I was always told that it is better to have the control or thermostatic valve on the inlet side, but I have not noticed any difference to be honest as on one or two rads it was more convenient to have the thermostatic valve on the return (outlet) side.

What you need to do though is to find out which pipe is flow and which pipe is return...

Good luck!

Derek

+1 for Tubal Cain's book. In fact anything by him (the real Tubal Cain aka T D Walshaw), or George Thomas....

Regards

Derek

Before starting my marine engineering apprenticeship I went to a secondary modern skool where I did rural studies which comprised digging the skool allotment/garden......none of your fancy grammar skool antics for me....

I still struggle over verbs, nouns and what they mean etc....but even I know the difference between their and there....

Regards to all

Derek

Hi Dr_GMJN

Your picture shows beautifully crack propagation in cast iron when under tension. Cast iron should always be under compression loading.

If the top plate was steel then that would be a better material.

I enjoy making tools in my workshop as long as they are well designed and fit for purpose. Anything designed by George Thomas that I have made has been worth the time spent making it. I suggest looking at the myford rear toolpost sold as a kit by Kirk at Hemingway Tools. It's not a huge project but worth considering.

I totally empathise we you about wasted time in the workshop, it happens to all of us but you still gain experience from these set backs.

Regards

Derek

I think February 30th is the only day you can go to a UK DIY store and obtain timber that is not warped, bent, twisted or shaped like a banana!

Regards to all

Derek

Duncan....how true!!!

It always makes me smile when I read articles about renovating machine tools and more care and effort is taken in the paint work!

The machine tools ability to do the job in hand far exceeds the quality of the paint finish.

After all once you brush down all the swarf you just created with that old paint brush, that beautiful paint finish is now scratched by all that nasty swarf.

I prefer "lathe..ing" to painting.......I must must remember to say that to the wife when she wants some decorating done around the house!

Regards to all

Derek

Welcome to the forum Tom.

There will be plenty of expertise on here to advise you, but please resist the temptation to take your lathe to peices to clean and paint it.......... you may do more damage and disturb critical settings that may take a while to realign.

I will leave it to others to help you, but pictures of the lathe would help us assess what is needed.

Regards to all

Derek

I agree with the comments above, just make sure table is smooth and the bottom of the vice and no swarf can be trapped.

You can use paper to assist with clamping work between the vice jaws or other clamps but this would only be temporary just for the job in hand.

Regards to all

Derek

Very sad news, I never met him but to be in on conversation with him and GHT over a cuppa....wow....

He left behind some great books and construction articles, thanks John.

Condolences to his family.

Regards

Derek

Great work Tug. Really good to see the old engine designs of ME so many years ago come to life. Maybe many are put off building them with the unavailability of castings or even having to making the moulds for such, but just shows what can be done out of the "solid".

I am following your build with interest. I too am a manual lathe and mill twiddler, though one day I might look at a DRO for the mill but as for CNC and g-code and all that....nah not for me, but horses for courses.

But equally entranced with what Jason turns out...

Regards to all

Derek

Not being an expert on forums but is this classed as an archaic forum? Or is it going to be change for changes sake.

No many people like change but that's life nothing ever stays the same...

Regards to all

Derek

Neil,

You said and I quote

"The editor is hard to use and non-standard"..............surely this cannot apply to our esteemed editor !

Derek

Oh no...I was in Hamburg 2019...for a long weekend....if only I knew about this museum when I was there.....sigh.....oh well lets hope we all get the opportunity to get out soon.

I want to go to the Forncett museum as its sort of near me and I have never heard of it until I read about it on this forum.

Anyway my contribution to the engineering books to read are: The Rotary Aero Engine by Andrew Nahum

Regards to all

Derek

Thought they were a prog rock group from the 70's.......

Regards to all

Derek

Hi,

I converted my super 7 crossslide dial to the modification suggested by GHT last year and it works really well - much better than the original.

GHT did also cover in the same article regarding modifying the ML7....

Regards to all

Derek

Brilliant comment!!!.......made me laugh.

I wonder what they were making...?

Regards to all

Derek

I am terrible at doing that!....I mean I don't bang them down hard enough to dink the table!

So today i am going to make one....thanks for the reminder

Back to the topic, David Colwill a great post, it is easy to sit back and criticise based on one photo and limited description of the task being undertaken.

There seem to be some on here who based on that photo, will now spend all day using stress analysis calculations to work out the amount of torque to tighten the clamps and to try and analyse the metallurgy of the steel clamps as well as how much the clamping bolts stretch and the component being compressed.

Come on everyone let's take a step back from this nit picking. The photo in my view (47 years engineering experience), does not demonstrate poor practice based on the job being done.

Best wishes to you all

Derek