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Member postings for jason udall

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

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Thread: What did you do today (2015)
18/07/2015 10:36:40
^----- hear hear
Thread: CAUTION - think before you post!
18/07/2015 10:32:36
I do not agree with what you have to say, but I'll defend to the death your right to say it."

Voltaire
18/07/2015 10:25:52
Words differently arranged have a different meaning, and meanings differently arranged have different effects.
Blaise Pascal
18/07/2015 10:03:29
Just to recap

A third party has "told tales" to a supplier.
Said supplier has been in direct contact with you.

Now whats the issue the supplier has?
Did you "diss" them ?
Did you make a later regrettable comment on goods or services?
Did you make comment you are willing to stand by?

My point is this ( forum content) is not nor should it be considered " in private or off the record". So as the op says...think before you click.. ( good advice at all times).
Thread: Why on earth did I do that...
18/07/2015 09:52:40
Shit happens. No claret or fingers on floor. .no harm Try to not repeat the experiment

Edited By jason udall on 18/07/2015 09:54:50

Thread: CAUTION - think before you post!
18/07/2015 09:49:31
..." there's no decorum in the forum"....
F. Howard ( again odd behaviour from this forum s/w) Well it was a chorus so maybe...

Edited By jason udall on 18/07/2015 09:51:23

18/07/2015 09:48:46
..." there's no decorum in the forum"....
F. Howard
Thread: Banjaxed hexagons
13/07/2015 09:41:58
Can I suggest something.
It may be obvious but.
Sketch out ( back of envelope if requjired ) the situation

In this case it will allow you to work out what question you are asking the maths..
"Do I add or subtract the number from what I measure?"
For instance it shows that the hex at maximum size has the same across corner "diameter"
The flats of the hex, if you could measure them , will be half this diameter.
Thus we have a triangle drawn in the bit machined off..
One size half a flat long
The other ( long side) half of half of the diameter...ie a quarter of the dia
Thus by trig we find the third side...0.067 times the original diameter..
Now this is the depth to machine off each side

Edited By jason udall on 13/07/2015 10:11:49

12/07/2015 13:57:42
Making bore/hex concentric?

Well . Either machine at one hit...ie not let work out of chuck and mount chuck on rotary table..


Or.
Index on lathe ( after turning bore) again no removing part from chuck..but then not all have live tooling on lathe.
.
Or clock bore on mill to acceptable accuracy. ..
.

But in all cases do/finish bore then machine outside.
12/07/2015 12:21:09
Btw the magic is 0.866...

Which is the sine of 60 degrees ( to four decimals)
12/07/2015 12:18:30
Note to self.ready the Blo**y question

What you are asking.
Is what total depth to cut when using a horizontal axis rt .

This is the challenge.

Lets assume the part is to the dia. Required for the across corners ( normally truncated some but lets ignor that for now).
What is the Across flats if the across corners is D?

Flat width is D/2
A/F is Dx0.866
Depth of cut is c which is D- A/F all divided by two
Or c =D (1-0.866)/2
c= Dx0.067
Working out available but I just look at zeus
12/07/2015 12:03:24
Maybe consider what might be the problem.
Imagine your stock is over size and off center and not true verticaly.

If you now machine to a stop ( say y axis).. thus having a flat in x axis at a given radius from the center of rotation of your rotary table.
Now rotate to next facet ( or even 180 to check your a/f)
Machine to stop.

You might notice that these flats are not equal width nor utterly parallel to the axis of your part .
Machine all faces..again to stop
Now you will .barring .. something shifting. .
have six faces equal and parallel to each other..but A not concentic to part
And B not parallel to part.

These latter are down to your patience is setting the part.
Thread: Help drilling bronze
09/07/2015 16:52:52
Martin. .I see what you refer to..
"Drilling holes to controlled depth in bronze"..would/could be a challenge on a pillar drill...
So.
Good work holding
Good tool holding
Fixed depth stop

Of course working undera mill spindle might be preferable.
Thread: How to cut a thread on small pipe fittings 1/2 inch in length ?
09/07/2015 13:05:14
Of course the above should read " 4 mm dia 2 mm ID"
Thread: Help drilling bronze
09/07/2015 13:03:15
There is indeed.
Thats why the bushes made from tube don't count
09/07/2015 11:00:12
Drilled quite a lot of bronze at work.
Never modified a drill to suit.

But.keep it ( tool and work) cool
Don't faff around and work harden metal.
..
Spoken after making about 1000 bushes a week from solid..5000 from tube. So in the latter normally bore only so don't count
Thread: How to cut a thread on small pipe fittings 1/2 inch in length ?
09/07/2015 10:54:56
Not much help to op but as production ( down to 4mm dia 2 mm od in 316 SS).. we regularly made nipples ( thread---parent metal ---thread) parts by screw cutting in "middle of bar "and parting off through threaded portion to seperate... slow in production terms since you have to allow for acc'n decc'n of tool to reduce /minimise thread runout ..its easier to keep up if you keep the rpm down to say 1000...
Its just how we did it. .10, 000 at a time.
Thread: help 2
03/07/2015 00:08:23
Michael...
Os X.mm
Unix >> linix>> > android?
02/07/2015 22:15:07
Spell checkers?

My biggest gripe is auto correct to the WRONG but correctly spelt word.
02/07/2015 22:12:21
Of course we could use unix or whatever thats grown into nowadays
<< First < Prev 15 16 17 18 19 20 21 22 23 24 25 Next > Last >>
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