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File or Grind? Why indeed!! |
03-27-2010, 07:02 PM | #3 | ||||||
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File or Grind? Why indeed!!
My guess is- if it was done with files, had to take some time. Sears and their mating contacts with the hammers- today 6150 Chrome Vanadium steels- RC 52-56 possibly. Not sure what grade steel Parker used, or heat treating range either
If this "work??" was done with a grinder, even with a quench and grind process, resultant heat input can pull hardness from the sear,- NOT a good thing. Also looks like the re-bored axle hole is out of round and with a drill bit with differing shoulder angles on the flutes, as evidence by the surface meatl "sprue" that was not ground off flush to the surface. For whatever reasons this sear was altered, pretty sloppy bit of work- IMO!! Last edited by Francis Morin; 03-28-2010 at 07:28 AM.. |
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03-27-2010, 07:29 PM | #4 | ||||||
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Nope, that hole has been drilled perpendicular to the 'axle' hole. I can't even take a WAG as to why it was done.
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03-27-2010, 07:40 PM | #5 | ||||||
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The hole might have been an attempt to replace a broken sear spring, no ideas about the grinding.
Jim A. |
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03-27-2010, 08:22 PM | #6 | ||||||
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Francis from my experience I don,t think the hardness is anywhere near that high. A sear being that hard would fracture.
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"Much care is bestowed to make it what the Sportsman needs-a good gun"-Charles Parker |
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The Following User Says Thank You to Dave Suponski For Your Post: |
03-27-2010, 09:22 PM | #7 | ||||||
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Correct and almost through.
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Hunt ethically. Eat heartily. |
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03-27-2010, 09:35 PM | #8 | ||||||
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Jim, I think you may win the prize. It also had a real jerry-rigged home built spring. When I dismantled, the end of the spring was not stuck in the hole but maybe it had been at some time. I only discovered the hole when finally getting all the rust off. Here's that spring. The wood screw was driven across the stock head as a poor man's stock pin. I guess it worked (the head is cracked inside). The other spring was normal. Still wondering why the sear was filed/ground.
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Hunt ethically. Eat heartily. |
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Sears- but No Roebucks |
04-08-2010, 09:24 AM | #9 | ||||||
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Sears- but No Roebucks
Jack-- still waiting to see what your wishes are re: 12 Trojan parts-- Dave may be right about the Rockwell range- hardness depends on the analysis of the steel, I would guess the hammer notch to be slightly harder than the tongue of the sear that fits it- maybe not.
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