Gunny,
many thanks for the PHP site and the rest. Just when I was going to spend the
next few hours writing things up you came to my rescue with the sites. I just have
to sit back and relish the new info. In particular I got an insight how to build a better
holder for my oversize back cut off tool than I have at present.
Safety points that came up in the valve welding presentation that should be known:
1. The brave machinist was
holding the valve by hand as he polished it. Long Living Chicken (LLC)
as I hold the stem in an ER-25 collet with a straight 1" spindle.
<<
http://www.mscdirect.com/product/420557 ... =-99&025=c >>.
You can get this same 1" diameter ( actually metric so it has a slightly smaller diameter ~ 31/32) collet chuck shank for $43.00
by ordering from Asia plus a few dollars shipping ... and a long time delivery. But worth it.
As an old 1970's SF manual taught ... use your adversaries' tools and weapons.
I also got a Metric 5C collet to hold shaft in my 4 and 6 sided 5C holder ( 5C COLLET BLOCK SET- SQUARE, HEX,
RINGS & COLLET CLOSER HOLDER).
I know that this is 'overkill' for an Atlas 618 lathe but it is in consonance
with my philosophy of "excess and back ups are a virtue" .
Oops. The flat bed with ammo is backing up to the back door.
The 5C blocks are nice easy way for making larger bolt heads
for many uses without the need for an indexer ( which I also had to have ...Tool Junky Alert!)
2. The welder
protected his face & eyes ....
but not his hands. By this I mean against the UV that arc welding creates.
Cases reported in Aerospace study 25 years ago of the increase in hand skin cancer due to intense UV. Please
consider using special gloves. Old cautious chickens do not get plucked or -ucked.
Again, wonderful info.
Best.
