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Posted: 6/22/2013 5:18:49 PM EDT
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Hello All:
I am trying to replicate the charging handle on a GM hydramatic M-16 A1 does anyone out there have measurements of the 6 little centerpunch marks on the back of the handle? I am looking for total length of all 6 dots, and maybe how far below the upper edge of the handle they are. Any info will help. Thanks in advance. |
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Quoted:
Dang somebob, I never realized until seeing the above pics that the dimples are actually square! Still learning something every day here......love this place.  The close-ups / blow-ups from digital cameras show way more detail than I can see with my eyes, I'm starting to use my computer as a magnifying glass. Quoted:
Mine for comparison. Hard to measure these buggers. http://i271.photobucket.com/albums/jj149/halpark/DSC01636_zpsdccf49bf.jpg http://i271.photobucket.com/albums/jj149/halpark/DSC01637_zps90ef4a62.jpg That's a cool looking handle, have you tried paint stripper on it? It almost looks like there are a couple different colors of paint on that thing. Oh, do you have an upper receiver or any other gold parts to match it? 
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Quoted:
Quoted:
Dang somebob, I never realized until seeing the above pics that the dimples are actually square! Still learning something every day here......love this place. The close-ups / blow-ups from digital cameras show way more detail than I can see with my eyes, I'm starting to use my computer as a magnifying glass. Quoted:
Mine for comparison. Hard to measure these buggers. http://i271.photobucket.com/albums/jj149/halpark/DSC01636_zpsdccf49bf.jpg http://i271.photobucket.com/albums/jj149/halpark/DSC01637_zps90ef4a62.jpg That's a cool looking handle, have you tried paint stripper on it? It almost looks like there are a couple different colors of paint on that thing. Oh, do you have an upper receiver or any other gold parts to match it? That's how I got it, I haven't tried to strip it or anything. The anodizing reminds of Dry Lube film that's on the early 20 rd. mags. It's very thin and light gray. It does appear to have gray anodizing and lighter gray dry lube on the latch. Only other gold parts I have are a slip ring. I hope I can find a gold or bronze upper, GM or not, to make a golden gun. Like yours. |
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Quoted:
the marks you are seeing there are related to the fixture that they used to hold the part while machining. They sometimes use a fixture with little cleats on it to dig into (slightly) the forging or sand casting. I agree, I haven't spent enough time looking at Hydra-Matic transmission parts to know if those marks are common on them. I'm not as familiar with common fixtures either, do you know if a cleat that would leave a mark like that is still available? What do you think about the flat spot on the right hand side of the "T", I've never seen a raised burr / displacement swell around it. |
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Quoted:
the marks you are seeing there are related to the fixture that they used to hold the part while machining. They sometimes use a fixture with little cleats on it to dig into (slightly) the forging or sand casting. Tom, that's what comes to mind when I look at these too. I'm guessing that the clamp detail had tapered "spikes", or grippers, on it, and if they clamped square to the part it left uniform holes like what are shown on the top handle in the stack of handles. More likely, the grippers clamped up at a slight angle, leaving non-uniform holes, like most of the pictured handles show. |
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