Question on 1917 ejector..

[jjroth]

Hello Gents,

Any information on the 1917 ejector as to material and Heat treatment, e.g.: Brinell hardness (BHN) or Rockwell scale results either Rc A or C??

Am taking a course in Finite Element Analysis and thought I use the 17 ejector for a small project to try an mimimize the leaf spring breakage, with some better design.
Thanks for your assistance.

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[jmoore]

Mmmm, as a mechanical engineer who's wasting his 8 years of college working as machinist, I appeciate coming up w/ projects of personal interest that often confound the professors. Give me a few days to test an ejector or two (hopefully there's a spare hiding amongst the bits so no disassembly req.).
Mind you the obvious improvement was cobbled up years ago by adapting a coil spring to the unit.Still sold by Numrich Arms(e-gunparts.com) I think.
A rounded bottom to the spring cut would have helped too!

[jjroth]

Can send a new spring to you for Rockwell testing.

I think the major factor in breakage is the slot, appears to be cut with a "bandsaw" and the interior of the kerf give cause for stress risers.
I'm a millwright/machinist turned ME also.

[jmoore]

I went out of the office onto the floor, so to speak.
The ejector seems to be cut from opposing sides w/ a 0.025" slitting cutter, as the terminus of the cut is 'v' shaped when viewed from the side(cross-section). Remington example at least.
First sample is measuring a consistant Rockwell 49.7 "C" (low 49.0 high 50.5) in the "spring" region. The ejector blade near the front runs approx. 42.5 "C".
Still haven't found my spares box, but I do have a P'14 that could be checked of required (Winchester). Not too keen about pulling apart the others.

[jmoore]

Meant to say that the ejector spring leaf itself was cut from the rest of the ejector proper w/ a two sided cut. Seems like a whole lot of trouble.
Mr. Roth, I hope this helps.