Posted: 4/6/2012 10:43:13 AM EDT
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Out at the range today plinking away merrily and my hammer snapped.
Anyone had this happen before? Sabre Defence lower with standard trigger on a Tacsol 22 upper. http://i1097.photobucket.com/albums/g346/wardcomp/a1073ec9.jpg |
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Quoted: Out at the range today plinking away merrily and my hammer snapped. Anyone had this happen before? Sabre Defence lower with standard trigger on a Tacsol 22 upper. http://i1097.photobucket.com/albums/g346/wardcomp/a1073ec9.jpg nope |
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Quoted:
Out at the range today plinking away merrily and my hammer snapped. Anyone had this happen before? Sabre Defence lower with standard trigger on a Tacsol 22 upper. http://i1097.photobucket.com/albums/g346/wardcomp/a1073ec9.jpg Seen them all break now |
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Quoted: It seems I may have broken an AR in a new and original way. Any palmreaders out there care to speculate on the chances of it happening again?  Here's a thread on similar |
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It seems I may have broken an AR in a new and original way. Any palmreaders out there care to speculate on the chances of it happening again? http://i330.photobucket.com/albums/l432/rbecks_2008/Mystic-meg-NoW.jpg Here's a thread on similar I've said this before but I've seen broken hammers with Geissele ( both Hi-Speed and SSA) Accuracy Speaks, RRA, LMT and now GI spec. I have also seen Jewells where the QC is right out. So yes, they break..and always in the same spot Do you need a replacement? |
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Quoted: I've said this before but I've seen broken hammers with Geissele ( both Hi-Speed and SSA) Accuracy Speaks, RRA, LMT and now GI spec. I have also seen Jewells where the QC is right out. So yes, they break..and always in the same spot Just a thought - could the problem be misaligned pivot pin holes, causing stress in the hammers? |
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Quoted:
Quoted:
I've said this before but I've seen broken hammers with Geissele ( both Hi-Speed and SSA) Accuracy Speaks, RRA, LMT and now GI spec. I have also seen Jewells where the QC is right out. So yes, they break..and always in the same spot Just a thought - could the problem be misaligned pivot pin holes, causing stress in the hammers? The stress would be at the bottom end and I'd expect the break to be there not at this spot. I've seen several, got one here came in the other day for replacement. It happens. |
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http://i1097.photobucket.com/albums/g346/wardcomp/DSC01796.jpg
Manufacturers mark. http://i1097.photobucket.com/albums/g346/wardcomp/DSC01795.jpg Better photo of the failure. Glad my life didnt depend on it ! Looks like cheap pot metal to me. |
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Quoted:
Metal Injection Molding, sadly a very widely used form of making parts for guns today. Soren Yes. And a frequent source of failed parts - partcularly on guns such as model 1911 varients produced by Kimber, Inc. and others. Metal injection molding (MIM) is a metalworking process where finely-powdered metal is mixed with a measured amount of binder material to comprise a 'feedstock' capable of being handled by plastic processing equipment through a process known as injection mold forming. The molding process allows complex parts to be shaped in a single operation and in high volume. End products are commonly component items used in various industries and applications. The nature of MIM feedstock flow is defined by a physics called rheology. Current equipment capability requires processing to stay limited to products that can be molded using typical volumes of 100 grams or less per "shot" into the mold. Rheology does allow this "shot" to be distributed into multiple cavities, thus becoming cost-effective for small, intricate, high-volume products which would otherwise be quite expensive to produce by alternate or classic methods. The variety of metals capable of implementation within MIM feedstock are referred to as powder metallurgy, and these contain the same alloying constituents found in industry standards for common and exotic metal applications. Subsequent conditioning operations are performed on the molded shape, where the binder material is removed and the metal particles are coalesced into the desired state for the metal alloy (from wiki). When correctly executed, the manufacturing method produces parts of equal or better quality to traditional production methods. However, defects are common when the best methods are not strictly followed or QC protocols not applied. |