Here is a list of all the postings Martin Kyte has made in our forums. Click on a thread name to jump to the thread.
|Thread: Hand cleaner|
|Thread: Machining soft jaws|
Thats not the idea with soft jaws. They are soft so you can machine them true for fixed diameters not so they will not mark the part.
The idea with soft jaws is to machine to fit the size of the part you wish to hold. So for example if you wanted to hold a thin 1 inch disk truly concentric hold a small bar right inside the jaws (sub flush) and tighten. Bore the tops of the jaws 1" dia a little under the tickness of your part. When you release the jaws you will be able to hold your disc true to it's circumference and as it is back against the recess in the jaws with no wobble. As the chuck has not been removed from the lathe and the recess was bored at that diameter everything will be spot on for as many discs as you need to machine but only for that diameter.. You need to do this each time for different diameters and shapes of part.
PS Jason beat me to it.
Edited By Martin Kyte on 11/05/2021 13:09:25
|Thread: Myford Super 7 apron seized??|
You are correct (KWIL) that he half nuts cam is in an eccentric mount but as this has not been touched it is reasonable to assume that it is where it should be.
I don't think it's a design fault, moving the saddle to the fixed end of the leadscrew ensures that the leadscrew is central to the bearings and reasonably rigid so that the saddle will self centre on the half nuts. If you do it in the middle the leadscrew is more flexible and the nuts may move the leadscrew rather than the leadscrew moving the saddle assembly. It's no different really from the technique for bolting the cross slide end plate back on. Screw right in so that the end plate is close to the nut and nip the bolts up.
|Thread: Dangerous eBay listings can be removed by regulators|
If I was trying to sell an item that I knew to be dangerous on eBay then I aught to know better and shouldn't be surprised if the advert was taken down. If I was selling a Myford for example that had a Drummond switch I would remove it and just sell the lathe.
In practice I suspect that aBay are being compliant by taking reasonable steps to ensure personal safety. I doubt actually if this will make any difference to us as Model Engineers.
|Thread: Cutting holes in copper|
Brad point drills work well in copper. Nothing wrong with the boring head idea.
|Thread: Rite Time Publishing|
No Idea about Rite Time but Ian Cobb sells Johns Clock Books if that is what you are after. It is a little strange if Rite Time are no more, the current issue of Model Engineer has an advert for them. Have you tried the telephone number.
+44 (0) 1420 487747
On the theme of MacroPhotography here are the finalists from our Lab's Science imaging competition.
As part of the LMB’s Microscope for Schools outreach project, the Science Image Award is a competition aiming to stimulate scientific curiosity in primary school children by connecting the microscopic world to everyday life. Each compeating primary school is loaned a hand held microscope camera and they submit their best images.
Results can be seen here:-
Great to see children getting so enthused.
|Thread: Repair It? Wossat Mean, Like?|
That's just progressive taxation. I approve of the gentle pressure to buy cheaper cars.
|Thread: Vitamin B12 / Pernicious Anaemia|
Maybe you need one of these.
but maybe it would provide more Iron and Coper than B12 even though "it are one"
|Thread: Aircraft General Discussion|
I can think of worst ways to spend your money. ;O)
|Thread: Workshop and Drilling holes with an ER collet chuck|
I'd lay odds that all those comments about scored shanks using drill chucks are people who only use one key position. I used to do that but now I tighten all three as a matter of course and never have had a drill slip in the chuck since.
PS ER collets can hold drills when you require it.
|Thread: Interesting old chisels|
As Dave Halford says the bottom one is a old style locksmiths mortice chisel known as a pig sticker.
|Thread: Mt3 extension for tailstock|
How does that improve the reach? Isn't it like having a lathe with a shorter bed?
|Thread: Soldering a mitred tube?|
Looks fine from what I can see.
Totally agree Bob. I didn't mean a wide gap just a fag paper worth.
You do need a gap to allow the solder to wick into the joint so beware of butting the tubes up too tight.
|Thread: Problems trying to sell-on a 'Swiss' Army knife|
Are you sure they are not confirming that they are old enough to sell it to you? Under 18's have to be supervised to sell booze.
|Thread: Loctite and quartering wheels|
Looking at the graphs on the data sheets the curing time is longer at lower temperatures so by assumption the open time should be longer too. Maybe choose a nice cold morning and switch the workshop heating off overnight?
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