50-B-9412 tool
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50-B-9412 tool
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- Wingnutt
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Re: 50-B-9412 tool
That looks like some kind of dial test indicator, for machinists, tool and die makers, and inspectors, for clamping on the tool post of a planer, or a lathe, or a milling arbor, etc. Does pressure on the end move the dial? Class 50 is factory apparatuses, so that makes sense. I don't have any Class 50 SNLs or any other SNL that might have Class 50 FSNs.
I'm on my phone for the rest of the day and I can't read what's on the dial. Should be mfgr's name and perhaps model number. Would someone transcribe it? That might be a good clue. Also, what are the measurements? Thousandths of inch?
I'm on my phone for the rest of the day and I can't read what's on the dial. Should be mfgr's name and perhaps model number. Would someone transcribe it? That might be a good clue. Also, what are the measurements? Thousandths of inch?
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Re: 50-B-9412 tool
41 M3 37mm A/T gun
42 M1A1 75mm pack how
43 MBT trailer
43 WC52
43 WC62
44 Chevy 1.5 ton
44 MZ2 USMC radio Jeep
44 RL35 reel cart
44 K38 trailer
43 K52 trailer
43 M3A4 handcarts(8)
M1942 USMC handcart
M1917 Litter Carrier
M1917 Ammo cart
43 Columbia bike
42 M1A1 75mm pack how
43 MBT trailer
43 WC52
43 WC62
44 Chevy 1.5 ton
44 MZ2 USMC radio Jeep
44 RL35 reel cart
44 K38 trailer
43 K52 trailer
43 M3A4 handcarts(8)
M1942 USMC handcart
M1917 Litter Carrier
M1917 Ammo cart
43 Columbia bike
- Wingnutt
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Re: 50-B-9412 tool
Definitely a dial indicator. Ames still makes them and other precision measuring instruments for machinery. I don't have an explanation for the "B" in the FSN, but that's what it is. That thumbscrew would allow you to position it on different angles as needed to fit a particular work or jig set up. It's used to check a dimension with very small and precise tolerances, then everything would be locked into place and the piece would be milled or planed or turned in quantity. And it would be used to check it. In this case a military machine shop, I guess.
I'm on the road, no access to my library, but I can check later. I don't remember dial indicators in the higher echelon tool-sets, but there might be.
I'm on the road, no access to my library, but I can check later. I don't remember dial indicators in the higher echelon tool-sets, but there might be.
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- d42jeep
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Re: 50-B-9412 tool
I wonder if the B might be for bracket since the FSN is on the bracket rather than the dial indicator itself?
-Don
-Don
Ford GPW 76344 DOD 11/42 Built in Richmond, CA
- Wingnutt
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Re: 50-B-9412 tool
You may be right about that FSN, Don.
Robin,
According to the April 1945 ORD 6 SNL G-27, a "41-I-100, INDICATOR, test, universal, dial-type, with tool holder base, non-swivel body," that came in a wooden box, was issued to every 3rd Echelon Tool-Set No. 1 and 4th Echelon Tool-Set No. 2. Not the same as the one you found, but similar enough to identify it as something similar.
Robin,
According to the April 1945 ORD 6 SNL G-27, a "41-I-100, INDICATOR, test, universal, dial-type, with tool holder base, non-swivel body," that came in a wooden box, was issued to every 3rd Echelon Tool-Set No. 1 and 4th Echelon Tool-Set No. 2. Not the same as the one you found, but similar enough to identify it as something similar.
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Re: 50-B-9412 tool
If that is 50C9410 on the box looks like it crosses to NSN 5220-00-213-9312 if that is of any help.
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Re: 50-B-9412 tool
Good sleuthing, Jeffs! And good to see you guys.
A common failure in a fuel injection system is wear, right? A surface dial test indicator like this would be very useful for measuring variations across a surface to detect wear. Having difficulty imaging how they'd position this. And it seems a little strange to dedicate a dial test indicator to one specific job, but that sure seems to be what the title on the box and the NSN add up to.
Maybe a real mechanic (that's your cue, Don!) can chime in.
A common failure in a fuel injection system is wear, right? A surface dial test indicator like this would be very useful for measuring variations across a surface to detect wear. Having difficulty imaging how they'd position this. And it seems a little strange to dedicate a dial test indicator to one specific job, but that sure seems to be what the title on the box and the NSN add up to.
Maybe a real mechanic (that's your cue, Don!) can chime in.
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Re: 50-B-9412 tool
I'm certainly no expert on early fuel injection but I do know that the exact time that the fuel is injected is all important and controlled by the injection pump. There were probably very few existing tools for fuel injection during the war so it's not surprising that new items were coming out. Even by 1957 GM's Rochester fuel injection was problematic and was usually removed and carburetors retrofitted. Diesel popularity really contributed to the perfection of direct injection.
-Don
-Don
Ford GPW 76344 DOD 11/42 Built in Richmond, CA
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