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F. George McDuffee F. George McDuffee is offline
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Default Machining falling block passage Source for 4340 bar stock?

On Mon, 15 Mar 2010 19:59:59 -0400, "Ed Huntress"
wrote:
snip
I'd start with wirecut EDM, leaving about 0.005" on
each side, and finish with a shaper and lapping.

snip
How about making everything slightly undersize and the applying
Moglice or Turcite for the final fit-up. Should be a very slick
action and if the Moglice is only a few thousandths thick the
compression should be tolerable. Anyone know how Moglice/Turcite
is for impact loads? If it works on ultrahigh speed million
dollar machine tools, it should work on an small bore rifle
action.

FYI
http://www.moglice.com/
http://www.neme-s.org/nemes%20gazette_files/G054.PDF
http://www.practicalmachinist.com/vb...endors-148557/
http://www.professionalplastics.com/...istantPlastics

some hits for moglice OR turcite "firearms
http://www.yellowbullet.com/forum/ar.../t-136620.html

Anyone seen a teflon coated rifle bolt?



Unka George (George McDuffee)
...............................
The past is a foreign country;
they do things differently there.
L. P. Hartley (1895-1972), British author.
The Go-Between, Prologue (1953).