No plugs in the knuckle on this Fox extractor frame, thus significant machine tool work to convert to ejectors. Wait, let me get to a lab with an electron microscope just to be sure
frank
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Fox Ejector conversion from Extractor
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Re: Fox Ejector conversion from Extractor
I will add that I have on hand here 7 different extractor frames. 2 are 16g, 1 is 20g. and the rest are 12g. Grades are SW, A and B. The range of manufacture is 1908 - 1929. ALL of them have plugged frames that are machined for the ejector type mainspring followers. I will note that the 1908 frame does have smaller plugs than the later ones.
,Brian Dudley
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Re: Fox Ejector conversion from Extractor
No biggie, the presence or absence of plugs in the knuckle isn't definitive.
For those readers who may be confused, the plugs (or the ejector trip plate collars) are a press-fit into a tapered hole that was drilled/reamed into the knuckle. That reaming was done from the front end when the frames were machined for inventory. Those plugs are common on extractor Foxes but some will be seen without the plugs as in the picture I already posted. If absent, possibly that was a cost cutting measure on frames that were earmarked for extractor guns.
Assuming your Fox frame has the plugs, the definitive test for easy conversion from extractor to ejector is as written earlier: "The nose of the long ejector-type mainspring follower must pass through a clearance hole in the hinge pin (on each side) and those holes are not always drilled through on extractor guns - no reason to do that for the extractor type follower. Thus some extra machining is required as I'd written here earlier."
I am posting one additional pic showing a long ejector-type mainspring follower layed on top of a Fox frame and it may be readily seen that the followers on each side must pass through the hinge pin. I've colored the ejector follower with red dykem to illustrate. And until someone completely disassembles a large enough sample of extractor Foxes to determine the presence/absence of a clearance hole through the hinge pin, there's no sense in anyone reporting they have X extractor Foxes with plugs in the knuckle. Again, the pic I posted two days ago is an extractor Fox that doesn't have plugs and doesn't have clearance holes for ejector-type mainspring followers. I’ll have that frame with me for show and tell for those who want to come by while at the Northeast SxS in June.
frank
For those readers who may be confused, the plugs (or the ejector trip plate collars) are a press-fit into a tapered hole that was drilled/reamed into the knuckle. That reaming was done from the front end when the frames were machined for inventory. Those plugs are common on extractor Foxes but some will be seen without the plugs as in the picture I already posted. If absent, possibly that was a cost cutting measure on frames that were earmarked for extractor guns.
Assuming your Fox frame has the plugs, the definitive test for easy conversion from extractor to ejector is as written earlier: "The nose of the long ejector-type mainspring follower must pass through a clearance hole in the hinge pin (on each side) and those holes are not always drilled through on extractor guns - no reason to do that for the extractor type follower. Thus some extra machining is required as I'd written here earlier."
I am posting one additional pic showing a long ejector-type mainspring follower layed on top of a Fox frame and it may be readily seen that the followers on each side must pass through the hinge pin. I've colored the ejector follower with red dykem to illustrate. And until someone completely disassembles a large enough sample of extractor Foxes to determine the presence/absence of a clearance hole through the hinge pin, there's no sense in anyone reporting they have X extractor Foxes with plugs in the knuckle. Again, the pic I posted two days ago is an extractor Fox that doesn't have plugs and doesn't have clearance holes for ejector-type mainspring followers. I’ll have that frame with me for show and tell for those who want to come by while at the Northeast SxS in June.
frank
Last edited by Silvers on Mon Apr 08, 2019 4:42 pm, edited 1 time in total.
Aan