Printable View
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.
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!
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.
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.
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.