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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 135 136 137 138 139 140 141 142 143 144 145 Next > Last >>
Thread: Turning
18/08/2011 17:02:34
Being a beekeeper this interests me, I think you are making it far too complicated Mark.
Simpler would be to get some stainless steel wire of the size and insert it into a suitable handle iether plastic or even hardwood.
You can then do what you want to do with the free end of the wire, making it into a spatular or cup.
Preserving the integrity of the bee egg is vital as is the time taken to manipulate.
Someone will come up with a source of the stainless steel wire which will be quite stiff even at 0.5mm dia.
 
Clive
Thread: What is the purpose of centre drill and how does it work?
14/08/2011 15:13:24
There are two types of centre drill, one with the straight conical form and the other has a curve in the that position.
The second type is used as a support when turning a piece of metal that is off center to the chuck center.
The curve allows contact all round the hole even though the tail stock is set over.
Most all lathe workers now own a running center, which no longer require grease or oil lube when working.
 
Clive
Thread: Why is it so hard to find materials in the UK?
14/08/2011 10:01:14
Thats why every engineer keeps a scrap bin on the off chance he will need a specific piece of metal.
I think its being called being a 'Magpie', sheds full of useful junk!
 
Clive
13/08/2011 14:10:21
For some time the foriegn products have been a bit suspect.
My son works for an Underwater Gas and Oil exploration company and sources materiel and finished items from many sources.
Some stainless steel pipe and elbows were fitted into the high pressure air system in an engine room and subsequently and elbow exploded, luckily no one was injured as my son had just left the engine room!
The investigation returned the fact that the source of the elbows was from an unknown source and they were all suspect even though a certificate of conformation had been issued!
Another example was a Stainless steel 'U' shackle rated at 7 tonne which sheared showing crystalline fracture. Again from an unknown source with again a certificate of conformation on it.
This has made my son very careful where the suppliers get their goods from.
It was surmised they were from Chinese sources but they could not verify where they came from.
take care with imported materiel.
This brings to mind the tade in fake aircraft spares, all found to be lacking and dangereous.
 
Clive
Thread: Rust and how to remove it.
13/08/2011 13:59:41
If it does that to a mug what is it doing to your teeth?
 
Clive
Thread: Fine finish
12/08/2011 08:24:36
The fine finish on brass and other metals is called 'Graining'.
Its where the parts are polished with emery sticks whilst they are turning or Grained on the flat in long easy strokes.
Its an old method of making clock parts look nice.
The deep gold finish is done with 'Dragons Blood' a mixture of varnish and colouring dye. Some times the parts are heated while the varnish dries.
 
Clive
Thread: mini mills - which is the best?
09/08/2011 21:01:28
Perhaps Tim who started the thread could give us an idea of his price range to buy a machine.
Looking through what is available I am now looking at' Wabeco' machines.
Even thinking of going to the works in Austria to visit and look at what they have.
I think one might just fit in the back of my Estate car.
What do I tell the customs though?
 
Clive
Thread: Making Lathe Feedscrews
08/08/2011 09:07:50
I have seen some Lead screws where it appeared that the thread had been 'Rolled'.
The thread top having the appearance of a curled over lip.
Interesting if they cut the thread and then 'Rolled' it , this would give a higher Brinell hardness figure for the metal. Making it longer wearing than a normal cut surface.
Also it could be a method of straightening it.
Has anyone else seen this at all?
 
Clive
Thread: Char schneider 1:10 scale French Tank
06/08/2011 23:14:44
Interesting project, mostly made from Alu. fancy chopping bits out of the Tefal frying pan, wify would go spare. They are not cheap.
I notice his only machine is a power drill and it looks as if it is all hand worked, file and sweat!
Well done.
 
Clive
Thread: Rust and how to remove it.
04/08/2011 21:18:22
There was a Mutiny in the Navy because the Higher ups wanted all the tea 'Fannies' polished bright.
The Matelots mutinied and the order was reversed.
They said that the tea tasted different when made in a polished tea urns and that it only tasted right in an urn coated with Tannin!
Another bit of useless information for you.
 
Clive
Thread: hole size for tight fit
04/08/2011 07:52:27
At the size of 6mm then a reamered hole is fine. The grubscrews (two) should be placed at 90 degrees apart.
If cone point then dimple the shaft.
This is the way its done on the Theodolites I work on.
 
Clive
Thread: Milling Machine
02/08/2011 16:40:20
I posted earlier about T slot covers, I have since found them again and the are on the Wabeco site.
If you look for the milling machines you will see, 'Ask price,' click on that and they are in that listing.
They are for 14 and 16 mm widths. Bit expensive for three pieces though!
 
Clive
Thread: Cutting oil
02/08/2011 13:55:40
For small work I use WD 40, I have a plastic lid and I spray a little into it and use a small brush.
This works on steel, brass and some plastics.
I also use it when drilling.
 
Clive
Thread: Don't assume the obvious
31/07/2011 21:57:53
There has been a distinct 'dumming down' of english and grammar for some years. Spelling is a clear example.
Dont ever ask for a handwritten CV because you will end up reading at 45 degrees as you come to the bottom of it.
Spidery writing slowly slanting down the page as you read of outward bound course and that the subject was 'Akela' in the scouts!
When in the army I was seconded to the Recruiting Office opposite Charing Cross station in London and one of the first things I was told, 'Get them to write their name and address on the form'.
Sure enough the first lot came in and then they left when they could not write the required name and address, they could not read or write!
I find a lot of young people are numerically disenchanted and cannot do mental arithmetic or carry out simple calculations without a calculator.
Further to this is a complete lack of knowedge of fractions and conversion of same to decimal.
There is also the lack of knowledge of Imperial measurements which in engineering are a must.
As for understanding a juvenile text message then I am dumb!
 
Clive
31/07/2011 19:14:02
Drawings usually tell what metal or materiel is to be used when making something and if it is supplied then the supplier will send the right materiel!
Given that instructions or the written word describe the sequence of operations for the skilled and the novice.
Matching the material to the component is then up to the engineer skilled or not.
Apart from that the skill level of the person is the level that he will work at and if it is poor he will ask questions and that is what this Forum is for.
Some of the questions this last week are very basic and maybe the person asking should not at that point be doing what he is asking about until his skill rating is upped a bit!
Letting a novice loose on a machine of any sort without supervision is criminal and if an injury occurs then watch out.
Nomenclature can catch the most wary person out particularly with shortened names and ambigous instructions.
I would never expect a layman to go into a forge and make a Horse Shoe but after watching and helping the Blacksmith and over time could start making horse shoes.
Only little ones at first of course.
So, clear and unambigous instructions or descriptions are a must. Clear and helpful tutoring will then give experience over time and then an Engineer is born!
 
Clive
31/07/2011 08:27:13
Grammar! Who learnt it?
Phospho Bronze is correct and in the first instance of use in full, ' PB' from then on.
Uninitiated engineers will just have to learn the basics as nowadays all young people expect instant satisfaction or boredom will set in! We cannot have that can we!
When they ask a question (If they can formulate a question from what they do not know, then it gets an answer here)
There are so many things in engineering that are common knowledge, learnt through experience and ability.
Intimate knowledge of different threads and forms. K factor for tapping metric threads and angles for cutting tools.
Even down to recognising and naming different types of wood are all essentials in the game.
Since the last Gobment changed Education so much and did away with all the hands on lessons like metal work and woodwork and let them do painting instead we have at least a generation of numbskulls in the 'Hand to brain interface' with no skills other than button pushing!
Yes, before you jump we had an Apprentice who had to be pushed all the way and could not remember what he was told from one day to the next. He did get a certificate and it felt as if I was doing it for him. He then immediately left to work on the Signalling equipment on the railway! All that wasted effort, never again.
 
Clive
Thread: Milling Machine
28/07/2011 19:44:11
I have seen on one of the tool suppliers web sites a pack of plastic inserts that go into the T slot and stop swarf falling in. I have just looked but cannot remember which one it was!
 
Clive
Thread: Linked drive belts from RDG
25/07/2011 08:33:23
Ian, It looks as if it was a Piper monoplane, what type I dont know but likely an Aztec or Comanche.
 
Clive

Edited By Clive Hartland on 25/07/2011 08:38:25

25/07/2011 08:30:16
I have just found Bearingboys.co.uk and they sell link belt13mm at £26.55 per mtr and 5 mtrs for £117.74 but they sell cogged belts of 753mm outside dia. for £ 2 - 3 each.
So it looks as if RDG are a bargain.
 
Clive
Thread: Locomotive axle length- clearance between wheels and axle boxes
24/07/2011 22:35:34
I also 'Rounded' the axle brg. guides so that the axles could rise and fall without binding.
That is one wheel of the axle could lift and not stick in the guides, hard to describe but essential. Particularly on the Evening Star with all those wheels.
 
Clive
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