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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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Gun Reamer?
How does one use a gun reamer? the end has no lead in chamfer.
Ebay Item number: 200759361238 Remove 333 to reply. Randy |
#2
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Gun Reamer?
"Randy333" wrote in message news How does one use a gun reamer? the end has no lead in chamfer. Ebay Item number: 200759361238 That's not a gun reamer. |
#3
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Gun Reamer?
"PrecisionmachinisT" wrote in message
... "Randy333" wrote in message news How does one use a gun reamer? the end has no lead in chamfer. Ebay Item number: 200759361238 That's not a gun reamer. Its not any form of "gun" reamer I am familiar with. Probably the EBAY poster was just keyword spamming. Its against the TOS, but ultimately all EBAY cares about is their own pocket. Usually a barrel chamber reamer is used in conjunction with a set of Go/NoGo gages. However, some match guns are adjusted a little tighter than that. I recall watching Mike Scheerz of Gila River Gunworks chambering on his lathe to match a gun to specific hand loaded cartridge specifications. Shoulder fit, head space etc... I wish I had studied what he was doing more and shot the breeze a little less back then. There are reams used for preparing a shotgun barrel for internal threading to use interchangeable choke tubes. The ones I have seen do not look anything like the one in that picture. |
#4
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Gun Reamer?
On Wed, 13 Jun 2012 15:39:39 -0700, "Bob La Londe"
wrote: "PrecisionmachinisT" wrote in message ... "Randy333" wrote in message news How does one use a gun reamer? the end has no lead in chamfer. Ebay Item number: 200759361238 That's not a gun reamer. Its not any form of "gun" reamer I am familiar with. Probably the EBAY poster was just keyword spamming. Its against the TOS, but ultimately all EBAY cares about is their own pocket. Usually a barrel chamber reamer is used in conjunction with a set of Go/NoGo gages. However, some match guns are adjusted a little tighter than that. I recall watching Mike Scheerz of Gila River Gunworks chambering on his lathe to match a gun to specific hand loaded cartridge specifications. Shoulder fit, head space etc... I wish I had studied what he was doing more and shot the breeze a little less back then. There are reams used for preparing a shotgun barrel for internal threading to use interchangeable choke tubes. The ones I have seen do not look anything like the one in that picture. A gun reamer is a type of long reamer, usually made for reaming valve guides and fluid passageways in aerospace and other applications. They're were once made like a gun drill, with a single lip, thus the "gun" designation. The term apparently is also applied to any reamer with long cutting edges; I don't recall, having not seen the term for decades. It's just a long reamer. What everyone (including me) were thinking of at first is a chambering reamer for rifles. Or, possibly, a shotgun chamber reamer for reaming out old shotguns made for roll-crimped shells so they can handle star-crimped types. -- Ed Huntress |
#5
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Gun Reamer?
"Ed Huntress" wrote in message ... On Wed, 13 Jun 2012 15:39:39 -0700, "Bob La Londe" wrote: "PrecisionmachinisT" wrote in message ... "Randy333" wrote in message news How does one use a gun reamer? the end has no lead in chamfer. Ebay Item number: 200759361238 That's not a gun reamer. Its not any form of "gun" reamer I am familiar with. Probably the EBAY poster was just keyword spamming. Its against the TOS, but ultimately all EBAY cares about is their own pocket. Usually a barrel chamber reamer is used in conjunction with a set of Go/NoGo gages. However, some match guns are adjusted a little tighter than that. I recall watching Mike Scheerz of Gila River Gunworks chambering on his lathe to match a gun to specific hand loaded cartridge specifications. Shoulder fit, head space etc... I wish I had studied what he was doing more and shot the breeze a little less back then. There are reams used for preparing a shotgun barrel for internal threading to use interchangeable choke tubes. The ones I have seen do not look anything like the one in that picture. A gun reamer is a type of long reamer, usually made for reaming valve guides and fluid passageways in aerospace and other applications. They're were once made like a gun drill, with a single lip, thus the "gun" designation. The term apparently is also applied to any reamer with long cutting edges; I don't recall, having not seen the term for decades. It's just a long reamer. What everyone (including me) were thinking of at first is a chambering reamer for rifles. Or, possibly, a shotgun chamber reamer for reaming out old shotguns made for roll-crimped shells so they can handle star-crimped types. For re-chambering rifles, I would think a piloted tool would be the standard design; use of a piloted tool it is without a doubt the process I would specify where consistant and reliable results are required regardless of whether the tool was being used in a lathe, drill press or even being spun by hand. The tool pictured in the ebay ad however, would probably more accurately be described as simply a flat bottom reamer.....in typical usage, where size and location control are both critical, it is either run in a bushing or else a short portion of the hole pre-bored to a very slightly oversized diameter before the rotating reamer is inserted; the oversized portion is later cut away entirely or is removed by chamfering the hole opening. Otherwise, the hole can be chamfered beforehand, but your actual results will vary quite a bit depending on whether the reamer is stationary like in a lathe tailstock; or rotating as in a drill press....also, depending on accuracy of centerline alignment, runout, and so forth..... |
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