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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.

Thread: Magnetic chucks on lathes
18/01/2012 21:24:09
with magnetic chucks ,you also need to consider pole spacing...you need to stradel a number of poles in the chuck... Work very well in grinders ,we add blocks to cover extra poles to act as extra lateral resistance
Thread: Stainless steel shaft
16/01/2012 22:27:28
.. [can not find way to delete duplicate post]

Edited By jason udall on 16/01/2012 22:33:24

16/01/2012 22:27:23
btw how out of round...guess enough to foul

We used to use "gauges" with tenth micron resolution with centerless grinding looked round on them but wouldn't turn between mic anvils.
16/01/2012 22:20:32
other smiths msybe local to you.
Thread: Turning very thin bar
16/01/2012 22:16:24
any way back to original post.
Like the first reply said... SHARP TOOLS
HSS for when carbide just wont do...!
Oh any cut SS very aggressivly...get under skin and dont let it work harden.
Odds is you 'rod' is wire and drawn thus work hardened...sugest starting from larger stock and turning off outside to get at tamer metal. Say start at three mm big.
16/01/2012 22:07:13
one problem with these " box tools"
They copy the incoming stocks variation onto finished diameter.
Thats part off why sliding head machines use ground stock.
Once had to turn 6.5 to 1.2 mm taper over 150mm.
So far so good.
Stock was Nominally 6.8mm 0.8 mm hole down middle "sort of"
And worst.stuff was poly ureathane..you could tie it in knots....

Thread: Stainless steel shaft
16/01/2012 21:49:36
maybe
smiths metals? Poole 01202893712
RS? 01536 201201
Rs may be better free del.
Smiths cheaper by foot but add carr...
Thread: Laser centreing
15/01/2012 21:05:44
ah..diode assy. swings on horizontal axis like pendulum..misbalanced thus "centifugal" force tips diode etc over.
Prefer fixed angle and change "ride height" to change ring diameter...still good idea

Thread: ME Shows
15/01/2012 19:46:46
Thanks again. Weymouth is on doorstep.
Will look into that.
Thread: Drilling Vise improvements question
15/01/2012 19:39:49
As to spelling.
I care more for meaning than spelling.
With a side of taxomonany...
15/01/2012 19:16:06
"Alabama?" lol
Thread: Loctite
15/01/2012 19:14:17
sorry 15kJ and 30s
15/01/2012 19:13:06
pump was half kilowatt so maybe took longer than I remember..1.5kJ/K for can so for 10 kelvin about 14kJ 500 Watts would be 28seconds.
Thread: Laser centreing
15/01/2012 18:56:46
huh? "adjust the circle diameter by changing the spindle speed"
REALLY want to know how that works....What rpm you got that can cause relativistic effects on say 1m radius.
Thread: Anyone willing or able to cast a small Top Hat ?
15/01/2012 18:45:12
silicon rubber to make mould from original
Metal clay into mould
Dry clay into kitchen oven...
Metal part out of oven..
Thread: ME Shows
15/01/2012 18:27:32
thanks David

Like you say..shows ...Taunton might be a goer but looking for club close enough for meetings.
15/01/2012 17:52:18
shows?
Any clubs in West Dorset... I say west dorset 'cos dorset "seems" to be centered on Poole. Axminster is better for me
Thread: Drilling Vise improvements question
15/01/2012 17:38:40
no expert but my guess
jaws parrallel to each other and square to clamp screw all perp. to slide of jaws.
Check/ fixfirst then at least vise holds well.

Use angle blocks clamped to mill bed..then clamp vise to angle block. Thus under side can be trued.Square to jaws..so jaw face perp.

Then square off top to use as datum.

Thread: ME Shows
15/01/2012 17:26:54
only one major trade show..MACH..
NEC every ...FOUR years!
Thread: Loctite
15/01/2012 17:21:28
the hot / cold thing reminds me of how they put "inserts" in milling cutters these days...heat up holder drop in insert , allow to cool
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