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#11
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what is this mystery pratt and whitney tool?
Bill Noble wrote:
"Dan" wrote in message ... Bill Noble wrote: "Dan" wrote in message ... Bill Noble wrote: "Flash" wrote in message ... "Bill Noble" wrote in message ... I originally posted this in the metal working newsgroup, some folks there thought the part might be recobnized by somone here - so, it's worth a try - any clues? thanks: I think this is probably quite old, but so far I have no idea what it is (or was part of) - there is another like it that has been sharpened to use as a boring bar - clearly that was not its original purpose. the one pictured in the drop box appears to be original - but orignal what, is the question. here are the links to the drop box: http://metalworking.com/Dropbox/P-W-1.JPG http://metalworking.com/Dropbox/P-W-2.JPG http://metalworking.com/Dropbox/P-W-1.txt Anyone got any clues about this item? The text file from the drop box is reproduced below: Mystery Pratt & Whitney tool - the cylindrical shank is exactly .500 inches, it says on the shank, the following: NO. 32 HS.-36 E-12 P&W MFD CT Made in USA it is NOT a drill bit. The part that extends beyond the 1/2 inch diameter shows a wear line like it was riding in a keyway. The point seems to be lathe turned, the 1/2 inch shank appears to be ground Bill - www.wbnoble.com -- Bill - www.wbnoble.com My first guess would be some sort of gagueing equipment. I have run across quite a few truly odd P&W gages and accessories for gage sets. They were willing to make some very specialized gages for a lot of unique applications. Flash Yes, I would agree, though I think it is not a specialty item - maybe part of something to measure camshafts and the like? I'd love to find someone who could say for sure what it was Specialized boring bar? The 1/2" round end reminds me of my boring bars, but I have never seen a cutting end like this thing has. I suppose it could be installed in a boring head and used to cut a groove beyond the reach of standard lathe tools. I'm probably way off, but I can't think of anything else. Dan, U.S. Air Force, retired plausible, barely - but this thing is NOT sharp, I don't think it's intended to cut anything - It was the best I could come up with I hope you find out what it is and tell us. Over the years I have seen many specialized tools that no one outside the trade could guess what they are for. Somewhere in my scrounge I have a tool for shaping the points on the end of wagon spokes. It's good for nothing else. Dan, U.S. Air Force, retired I've written Pratt and Whitney - we shall see if they have an answer - meanwhile, here is my latest "brilliant" speculation - the ground part is quite accurately ground to 1/2 inch - I just noticed that the flat part is tapered in width, it is .194 near the pointy end, and .144 right next to the ground round part. Further, the width of the flat part (until the very end where it is much wider) is .565. So, if you now imagine that this tool is slid into a 1/2 inch hole which has a keyway broached in it that is deeper than 65 thousandths, then the thing will enter the hole farther as the keyway gets wider - so that would make it a tool for measuring the width of keyways. Now, if my speculation were true, the ground 1/2 inch part would be just under 1/2 inch so it would be a sliding fit - so I got out my best measuring tool, an SPI digital micrometer that claims .00005 inch accuracy and I measured it - sure enough,. 0.49950 - so it is 1/2 thousandth undersize. This site shows some keyway width gauges http://www.jayeshentp.com/products.htm which don't look like this at all There is possible wear on the part that extends farther - it is .695 inches in diameter - and it goes from .18360 to .19220 - which nicely spans 3/16 (.1875). Ya think this could be it? Just for giggles you might want to check your calibration/instruction sheet for your mike. Taken out to that many places it's only accurate at one specific temperature. The more I look at this thing the more it looks like an eccentric wood boring spade bit. Then again, I have known people who would expend a lot of energy making such a thing as a joke. When I flew RC in the 1970s I would carry a prop wrench that wouldn't fit any nut known to man. I was always willing to loan it at the field. I got the idea from an article in RCM magazine. Dan, U.S. Air Force, retired |
#12
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what is this mystery pratt and whitney tool?
"Dan" wrote in message ... Bill Noble wrote: Dan, U.S. Air Force, retired plausible, barely - but this thing is NOT sharp, I don't think it's intended to cut anything - It was the best I could come up with I hope you find out what it is and tell us. Over the years I have seen many specialized tools that no one outside the trade could guess what they are for. Somewhere in my scrounge I have a tool for shaping the points on the end of wagon spokes. It's good for nothing else. Dan, U.S. Air Force, retired I've written Pratt and Whitney - we shall see if they have an answer - meanwhile, here is my latest "brilliant" speculation - the ground part is quite accurately ground to 1/2 inch - I just noticed that the flat part is tapered in width, it is .194 near the pointy end, and .144 right next to the ground round part. Further, the width of the flat part (until the very end where it is much wider) is .565. So, if you now imagine that this tool is slid into a 1/2 inch hole which has a keyway broached in it that is deeper than 65 thousandths, then the thing will enter the hole farther as the keyway gets wider - so that would make it a tool for measuring the width of keyways. Now, if my speculation were true, the ground 1/2 inch part would be just under 1/2 inch so it would be a sliding fit - so I got out my best measuring tool, an SPI digital micrometer that claims .00005 inch accuracy and I measured it - sure enough,. 0.49950 - so it is 1/2 thousandth undersize. This site shows some keyway width gauges http://www.jayeshentp.com/products.htm which don't look like this at all There is possible wear on the part that extends farther - it is .695 inches in diameter - and it goes from .18360 to .19220 - which nicely spans 3/16 (.1875). Ya think this could be it? Just for giggles you might want to check your calibration/instruction sheet for your mike. Taken out to that many places it's only accurate at one specific temperature. The more I look at this thing the more it looks like an eccentric wood boring spade bit. Then again, I have known people who would expend a lot of energy making such a thing as a joke. When I flew RC in the 1970s I would carry a prop wrench that wouldn't fit any nut known to man. I was always willing to loan it at the field. I got the idea from an article in RCM magazine. Dan, U.S. Air Force, retired well, here is the catalog page for themicrometer - http://www.swissprec.com/CGI/ISPDFF?PMCTLG=01&PMPAGE=19 It claims an accuracy of 16 microns, the .00005 is the display resolution - I don't have any jobe blocks to check the calibration with, but in general SPI is a pretty good company. I won this directly from SPI in a drawing at a trade show - that was pretty nice.... rodger on the "looks like", but of course, it isn't..... I'm quite sure it's part of some piece of measuring equipment - I guess if I don't find out, I'll call it a 1/2 inch "minus" plug gauge and keep it for that purpose.... |
#13
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what is this mystery pratt and whitney tool?
In article ,
"Bill Noble" wrote: "Dan" wrote in message ... Bill Noble wrote: Dan, U.S. Air Force, retired plausible, barely - but this thing is NOT sharp, I don't think it's intended to cut anything - It was the best I could come up with I hope you find out what it is and tell us. Over the years I have seen many specialized tools that no one outside the trade could guess what they are for. Somewhere in my scrounge I have a tool for shaping the points on the end of wagon spokes. It's good for nothing else. Dan, U.S. Air Force, retired I've written Pratt and Whitney - we shall see if they have an answer - meanwhile, here is my latest "brilliant" speculation - the ground part is quite accurately ground to 1/2 inch - I just noticed that the flat part is tapered in width, it is .194 near the pointy end, and .144 right next to the ground round part. Further, the width of the flat part (until the very end where it is much wider) is .565. So, if you now imagine that this tool is slid into a 1/2 inch hole which has a keyway broached in it that is deeper than 65 thousandths, then the thing will enter the hole farther as the keyway gets wider - so that would make it a tool for measuring the width of keyways. Now, if my speculation were true, the ground 1/2 inch part would be just under 1/2 inch so it would be a sliding fit - so I got out my best measuring tool, an SPI digital micrometer that claims .00005 inch accuracy and I measured it - sure enough,. 0.49950 - so it is 1/2 thousandth undersize. This site shows some keyway width gauges http://www.jayeshentp.com/products.htm which don't look like this at all There is possible wear on the part that extends farther - it is .695 inches in diameter - and it goes from .18360 to .19220 - which nicely spans 3/16 (.1875). Ya think this could be it? Just for giggles you might want to check your calibration/instruction sheet for your mike. Taken out to that many places it's only accurate at one specific temperature. The more I look at this thing the more it looks like an eccentric wood boring spade bit. Then again, I have known people who would expend a lot of energy making such a thing as a joke. When I flew RC in the 1970s I would carry a prop wrench that wouldn't fit any nut known to man. I was always willing to loan it at the field. I got the idea from an article in RCM magazine. Dan, U.S. Air Force, retired well, here is the catalog page for themicrometer - http://www.swissprec.com/CGI/ISPDFF?PMCTLG=01&PMPAGE=19 It claims an accuracy of 16 microns, the .00005 is the display resolution - I don't have any jobe blocks to check the calibration with, but in general SPI is a pretty good company. I won this directly from SPI in a drawing at a trade show - that was pretty nice.... rodger on the "looks like", but of course, it isn't..... I'm quite sure it's part of some piece of measuring equipment - I guess if I don't find out, I'll call it a 1/2 inch "minus" plug gauge and keep it for that purpose.... I was wondering if the pointy end of it might be some sort of dead centre... -- Alan Baker Vancouver, British Columbia http://gallery.me.com/alangbaker/100008/DSCF0162/web.jpg |
#14
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what is this mystery pratt and whitney tool?
Bill Noble wrote:
"Dan" wrote in message ... Bill Noble wrote: Dan, U.S. Air Force, retired plausible, barely - but this thing is NOT sharp, I don't think it's intended to cut anything - It was the best I could come up with I hope you find out what it is and tell us. Over the years I have seen many specialized tools that no one outside the trade could guess what they are for. Somewhere in my scrounge I have a tool for shaping the points on the end of wagon spokes. It's good for nothing else. Dan, U.S. Air Force, retired I've written Pratt and Whitney - we shall see if they have an answer - meanwhile, here is my latest "brilliant" speculation - the ground part is quite accurately ground to 1/2 inch - I just noticed that the flat part is tapered in width, it is .194 near the pointy end, and .144 right next to the ground round part. Further, the width of the flat part (until the very end where it is much wider) is .565. So, if you now imagine that this tool is slid into a 1/2 inch hole which has a keyway broached in it that is deeper than 65 thousandths, then the thing will enter the hole farther as the keyway gets wider - so that would make it a tool for measuring the width of keyways. Now, if my speculation were true, the ground 1/2 inch part would be just under 1/2 inch so it would be a sliding fit - so I got out my best measuring tool, an SPI digital micrometer that claims .00005 inch accuracy and I measured it - sure enough,. 0.49950 - so it is 1/2 thousandth undersize. This site shows some keyway width gauges http://www.jayeshentp.com/products.htm which don't look like this at all There is possible wear on the part that extends farther - it is .695 inches in diameter - and it goes from .18360 to .19220 - which nicely spans 3/16 (.1875). Ya think this could be it? Just for giggles you might want to check your calibration/instruction sheet for your mike. Taken out to that many places it's only accurate at one specific temperature. The more I look at this thing the more it looks like an eccentric wood boring spade bit. Then again, I have known people who would expend a lot of energy making such a thing as a joke. When I flew RC in the 1970s I would carry a prop wrench that wouldn't fit any nut known to man. I was always willing to loan it at the field. I got the idea from an article in RCM magazine. Dan, U.S. Air Force, retired well, here is the catalog page for themicrometer - http://www.swissprec.com/CGI/ISPDFF?PMCTLG=01&PMPAGE=19 It claims an accuracy of 16 microns, the .00005 is the display resolution - I don't have any jobe blocks to check the calibration with, but in general SPI is a pretty good company. I won this directly from SPI in a drawing at a trade show - that was pretty nice.... I was thinking of the thermal expansion/contraction of the work being measured. rodger on the "looks like", but of course, it isn't..... I'm quite sure it's part of some piece of measuring equipment - I guess if I don't find out, I'll call it a 1/2 inch "minus" plug gauge and keep it for that purpose.... You could always use it to clean your nails, I suppose. Dan, U.S. Air Force, retired |
#15
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what is this mystery pratt and whitney tool?
Alan Baker wrote:
In article , "Bill Noble" wrote: "Dan" wrote in message ... Bill Noble wrote: Dan, U.S. Air Force, retired plausible, barely - but this thing is NOT sharp, I don't think it's intended to cut anything - It was the best I could come up with I hope you find out what it is and tell us. Over the years I have seen many specialized tools that no one outside the trade could guess what they are for. Somewhere in my scrounge I have a tool for shaping the points on the end of wagon spokes. It's good for nothing else. Dan, U.S. Air Force, retired I've written Pratt and Whitney - we shall see if they have an answer - meanwhile, here is my latest "brilliant" speculation - the ground part is quite accurately ground to 1/2 inch - I just noticed that the flat part is tapered in width, it is .194 near the pointy end, and .144 right next to the ground round part. Further, the width of the flat part (until the very end where it is much wider) is .565. So, if you now imagine that this tool is slid into a 1/2 inch hole which has a keyway broached in it that is deeper than 65 thousandths, then the thing will enter the hole farther as the keyway gets wider - so that would make it a tool for measuring the width of keyways. Now, if my speculation were true, the ground 1/2 inch part would be just under 1/2 inch so it would be a sliding fit - so I got out my best measuring tool, an SPI digital micrometer that claims .00005 inch accuracy and I measured it - sure enough,. 0.49950 - so it is 1/2 thousandth undersize. This site shows some keyway width gauges http://www.jayeshentp.com/products.htm which don't look like this at all There is possible wear on the part that extends farther - it is .695 inches in diameter - and it goes from .18360 to .19220 - which nicely spans 3/16 (.1875). Ya think this could be it? Just for giggles you might want to check your calibration/instruction sheet for your mike. Taken out to that many places it's only accurate at one specific temperature. The more I look at this thing the more it looks like an eccentric wood boring spade bit. Then again, I have known people who would expend a lot of energy making such a thing as a joke. When I flew RC in the 1970s I would carry a prop wrench that wouldn't fit any nut known to man. I was always willing to loan it at the field. I got the idea from an article in RCM magazine. Dan, U.S. Air Force, retired well, here is the catalog page for themicrometer - http://www.swissprec.com/CGI/ISPDFF?PMCTLG=01&PMPAGE=19 It claims an accuracy of 16 microns, the .00005 is the display resolution - I don't have any jobe blocks to check the calibration with, but in general SPI is a pretty good company. I won this directly from SPI in a drawing at a trade show - that was pretty nice.... rodger on the "looks like", but of course, it isn't..... I'm quite sure it's part of some piece of measuring equipment - I guess if I don't find out, I'll call it a 1/2 inch "minus" plug gauge and keep it for that purpose.... I was wondering if the pointy end of it might be some sort of dead centre... In that case it would be a conical point to avoid damaging the work, would it not? Dan, U.S. Air Force, retired |
#16
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what is this mystery pratt and whitney tool?
"Dan" wrote in message ... I was wondering if the pointy end of it might be some sort of dead centre... In that case it would be a conical point to avoid damaging the work, would it not? Dan, U.S. Air Force, retired the "pointy end" does have a 60 degree point exactly like a dead center - originally I thought it went in a head/tail stock of a measuring instrument, but I don't think the precision of the point is what one would expect there - the only precision ground part is the cylinder - and the taper of the flat part is intriguing, to say the least. My friend, who handed me this thing, has another one that someone has sharpened into a boring tool, but that clearly was not its original usage - this one appears to be as P&W intended it. By the way, for those interested in such things, the P&W measuring tool company (not the engine company of the same name) has a very nice 1~50 page history of the company with lots of photos and stuff on-line as a set of PDF files - it's on their main site. (and no, I couldn't find a hint as to what this was in there either....) |
#17
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what is this mystery pratt and whitney tool?
"Dan" wrote Then again, I have known people who would expend a lot of energy making such a thing as a joke. When I flew RC in the 1970s I would carry a prop wrench that wouldn't fit any nut known to man. I was always willing to loan it at the field. I got the idea from an article in RCM magazine. Man, you are one _sick_ puppy! That's just ........ WrOoOnG !!! ;-)) Then again, I _like_ it! I may have to fix me up one! g |
#18
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what is this mystery pratt and whitney tool?
In article , Dan
wrote: Alan Baker wrote: In article , "Bill Noble" wrote: "Dan" wrote in message ... Bill Noble wrote: Dan, U.S. Air Force, retired plausible, barely - but this thing is NOT sharp, I don't think it's intended to cut anything - It was the best I could come up with I hope you find out what it is and tell us. Over the years I have seen many specialized tools that no one outside the trade could guess what they are for. Somewhere in my scrounge I have a tool for shaping the points on the end of wagon spokes. It's good for nothing else. Dan, U.S. Air Force, retired I've written Pratt and Whitney - we shall see if they have an answer - meanwhile, here is my latest "brilliant" speculation - the ground part is quite accurately ground to 1/2 inch - I just noticed that the flat part is tapered in width, it is .194 near the pointy end, and .144 right next to the ground round part. Further, the width of the flat part (until the very end where it is much wider) is .565. So, if you now imagine that this tool is slid into a 1/2 inch hole which has a keyway broached in it that is deeper than 65 thousandths, then the thing will enter the hole farther as the keyway gets wider - so that would make it a tool for measuring the width of keyways. Now, if my speculation were true, the ground 1/2 inch part would be just under 1/2 inch so it would be a sliding fit - so I got out my best measuring tool, an SPI digital micrometer that claims .00005 inch accuracy and I measured it - sure enough,. 0.49950 - so it is 1/2 thousandth undersize. This site shows some keyway width gauges http://www.jayeshentp.com/products.htm which don't look like this at all There is possible wear on the part that extends farther - it is .695 inches in diameter - and it goes from .18360 to .19220 - which nicely spans 3/16 (.1875). Ya think this could be it? Just for giggles you might want to check your calibration/instruction sheet for your mike. Taken out to that many places it's only accurate at one specific temperature. The more I look at this thing the more it looks like an eccentric wood boring spade bit. Then again, I have known people who would expend a lot of energy making such a thing as a joke. When I flew RC in the 1970s I would carry a prop wrench that wouldn't fit any nut known to man. I was always willing to loan it at the field. I got the idea from an article in RCM magazine. Dan, U.S. Air Force, retired well, here is the catalog page for themicrometer - http://www.swissprec.com/CGI/ISPDFF?PMCTLG=01&PMPAGE=19 It claims an accuracy of 16 microns, the .00005 is the display resolution - I don't have any jobe blocks to check the calibration with, but in general SPI is a pretty good company. I won this directly from SPI in a drawing at a trade show - that was pretty nice.... rodger on the "looks like", but of course, it isn't..... I'm quite sure it's part of some piece of measuring equipment - I guess if I don't find out, I'll call it a 1/2 inch "minus" plug gauge and keep it for that purpose.... I was wondering if the pointy end of it might be some sort of dead centre... In that case it would be a conical point to avoid damaging the work, would it not? Dan, U.S. Air Force, retired Yes, but isn't the very end of it a conical point? -- Alan Baker Vancouver, British Columbia http://gallery.me.com/alangbaker/100008/DSCF0162/web.jpg |
#19
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what is this mystery pratt and whitney tool?
On Fri, 9 Oct 2009 18:06:55 -0400, "Morgans"
wrote: "Dan" wrote Then again, I have known people who would expend a lot of energy making such a thing as a joke. When I flew RC in the 1970s I would carry a prop wrench that wouldn't fit any nut known to man. I was always willing to loan it at the field. I got the idea from an article in RCM magazine. Man, you are one _sick_ puppy! That's just ........ WrOoOnG !!! ;-)) Then again, I _like_ it! I may have to fix me up one! g dont be a ******* :-). reminds me of the disassembly of my Auster. armed with a full set of good quality A/F spanners I was horrified to find that not one spanner fitted The entire aircraft had to be disassembled with two adjustable jaw spanners. why the poms used BA I'll never know. Stealth Pilot |
#20
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what is this mystery pratt and whitney tool?
Stealth Pilot wrote:
... reminds me of the disassembly of my Auster. armed with a full set of good quality A/F spanners I was horrified to find that not one spanner fitted The entire aircraft had to be disassembled with two adjustable jaw spanners. why the poms used BA I'll never know. Stealth Pilot ..er... the BA was an effort at going metric! Then there was BSF, BSWhit BSBike, BSPipe, RAS and several others that I forget. Brian W |
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