By continuing to use this site, you agree to our use of cookies. Find out more

Member postings for Clive Hartland

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

<< First < Prev 142 143 144 145 146 147
Thread: Fixing firedoors to copper boiler
28/03/2011 18:46:52
How I read it in the book for making the Evening Star was that the copper studs were made with and incomplete thread that would seal itself into the backhead.
I have visions of the threaded portion breaking off and you are left with just the mount part.
Even then I cannot see this method being a problem as the pressure on an 8Ba pin is very small and we all know that the worker is an expert and tried it out on a bit of spare copper?
I think I would have followed the method myself but if I was having a commercial boiler then I would specify mounts anyway but I dont have £1300 plus for a boiler, this was the last quote, previous to the legislation it was £320!
I know all about traceabilty and quality control and could show severe failures of prime equipment that my son has to endure on his deep sea survey boats.
 
Clive
Thread: Things we should not do
27/03/2011 19:44:43
All machine tooling in educational establishments have to have safety interlocks.
In the manufacturers brochures they are advertised for that purpose.
 
clive
Thread: Misfire
26/03/2011 19:41:20
While owning a Ford Escort I experienced misfiring, suspecting the plugs I installed new ones but it still happened. This was using the recommended settings of 25thou.
I had the use of a Spark Plug tester and was able to observe the plugs working upto 150Psi.
As the pressure was increased the plugs started to misfire and the spark became erratic, my first reaction was to open the points to 30thou. which took the plugs up to the maximum pressure with no misfiring evident.
I re-installed the plugs in the car and added another 2thou. to the gap making thirty two thou. in all.
No more problems and I also gained an increase in power and mileage.
 
I look at the carburreter induction tubes Johan, they are long and narrow. There is a chance that the petrol air mix is condensing in the tubes and not reaching the cylinders as vapour?
I would feel a carburreter at the same level as the cylinder head might be better with much shorter unduction.
 
Clive
Thread: Things we should not do
26/03/2011 19:31:00
Working for LEICA we were equipped with Shaublin Lathes and Milling machines, lovely machines and well made and can be used for every conceivable type of work.
They are of course very expensive.
I am very spoiled but have to do with a Myford now, sad!
The N102 Lathe has a pedal clutch which is a boon when doing repetitive work, slip the clutch undo the collet or chuck put in another item and off you go.
Comes the H & S man, watches me for a few seconds and starts on at me about doing dangerous acts on a moving machine, needless to say he knew nothing about Lathes , only seeing what to him was a dangerous act.
He was then taken to the Ultrasonic cleaning machines and again was up in arms about exposure to fumes and vapour until I pointed out we were using Aqueous liquid ( Micro) and it was harmless to the operators and the environment.
Safety in the workshop is part of the workers job to ensure that he harms no one nor himself.
I have seen some accidents, a crankshaft grinding wheel going up through the roof, we only ever found one half of it! A flashback on an Acetyline bottle, that was frightening with the screeching and panic.
I have seen three large gun barrels dropped from a travelling crane bouncing all over the place. Luckily no one was hurt.
But the most stupid was the man who found an un-exploded head off a 20mm shell and put in a vice and hit it with a hammer. It split the vice in two and took off two of his fingers and he had a lot of shrapnel on the side facing the vice.
So, there is safe working and stupidity.
Approaching a job one should assess the inherant dangers and work accordingly, talk to a Millwright who lost three fingers in the milling machine. That was through poking a twisted wire stem brush to clean off swarf while it was cuttiing.
You have an obligation to work safe and also to prevent any one else getting hurt.
 
Clive
 
Thread: Case Hardening
26/03/2011 10:48:44
I have read these postings with some interest, I have several times case hardened small items for gun triggers without such things as Kasenit.
What I did was to cut up some old leather shoe leather and mixed a bit of charcoal with it and placed the items in with the mix and heated it up in a metal container , good enough to resist the heat and then quenched.
The surface was file hard and to my knowledge has endured 20 years so far with out breaking or wear.
 
Clive
Thread: Handwheels
26/03/2011 10:36:52
During my army service I had the job of filling the engravings of the range scales of artillery weapons, (Dial Sight Carriers)
We used cellulose paint in black, blue and red to denote the cardinal markings.
We cleaned the brass with cellulose thinners and painstakingley followed every curved line to fill it.
The next day would be spent using a thinners moistened cloth to rub off the excess paint.
I cannot remember any flaking out even exposed to all weathers.
 
Clive
26/03/2011 10:30:33
Having just completed a Worden T & C, I have sharpened a couple of milling cutters but lack specific angles for the cutting edge and detail of applying the 45 degree cut back of the sharp corner of the cutting edge.
For these two cutters I used a 4 degree setting!
This was referred to by David recently, apparently reduces the damage to the corner and increases the life of the cutting edge.
Along with this, I have noticed now that the bars supplied with the Worden kit have started to show spiral markings as are referenced to in another posting about roundness of stock metal bars.
In retrospect I think I would have purchased some ground bar to replace it If I had known before hand.
 
Clive
Thread: Fixing firedoors to copper boiler
25/03/2011 17:55:44
I have seen reference to fitting the fire doors (two sliding doors and rails) where it is suggested that the rails are mounted by drilling into the backhead and tapping a thread.
Then copper threaded pins inserted to hold the rails.
 
Clive
Thread: Brand new Martin Evans locomotive design to be published
25/03/2011 17:52:30
I am about to make the Boiler for my 9F Loco, The plan size shows a tube dia. of four and five eighths but I can get a copper tube of 4 and a half inches.
Is there a problen if I use the smaller dia.?
I would make up the dia. with cladding and insulation mtl.
I have a rolling chassi and have completed the Tender. The whole model now awaits the boiler and firebox. Have yet to make the cab.
 
Clive
<< First < Prev 142 143 144 145 146 147
Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Sign up to our Newsletter

Sign up to our newsletter and get a free digital issue.

You can unsubscribe at anytime. View our privacy policy at www.mortons.co.uk/privacy

Latest Forum Posts
Support Our Partners
cowells
Sarik
MERIDIENNE EXHIBITIONS LTD
Shopping Partners
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest

 

Donate

donate