Hern ironworks Verbruggen Barrel - Page 3 - Graybeard Outdoors
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post #21 of 62 (permalink) Old 02-18-2019, 01:24 PM Thread Starter
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Ok now I am confused , As I see the photos the pattern is in two parts with pins holding the two halves in alignment. Are you gluing the two halves together with a paper shim and then splitting it when done turning?



Moose,
The two halves are not glued.
Look at the 3/8" holes along the barrel. I countersunk these before I started turning and screwed the two halves together with 3" deck screws. They are in the middle so I never had to worry about hitting them.





I also glued and screwed end caps on to help hold the pieces together.










Then I added the hose clamps and removed the 3" deck screws and plugged the holes with 3/8" dowels.
With the hose clamps in place, I could spin the lathe and smooth out the ends of the glued dowels.







I cut off the glued ends, finished off the cascabel by hand and then removed the hose clamps.
With nothing holding it together anymore besides the three 1" wooden pegs, it pried apart very easily.






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post #22 of 62 (permalink) Old 02-18-2019, 06:12 PM
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Thank you , that makes sense now .
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post #23 of 62 (permalink) Old 02-18-2019, 07:15 PM
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Been, me I would have got out my angle grinder with Kutzall wheel, spin that lathe up to warp drive and made the block of wood round in no time...
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post #24 of 62 (permalink) Old 02-19-2019, 01:35 PM
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This is definitely an interesting thread, seeing how Hern builds their guns.
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post #25 of 62 (permalink) Old 02-19-2019, 02:32 PM
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You know Micheal.



You have inspired me to turn a Barrel in my Shop Smith Lathe when it warms. Might be kinda fun to try and see how I do. What kind of cheaper wood might be a good donor piece. For practice with the potential for disaster, I would not want to try anything in expensive wood first. Maybe just a cheap 4 foot post?



I am thinking a 1841 six pounder, maybe 1/3 scale. I really like the profile of the 1841.
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post #26 of 62 (permalink) Old 02-19-2019, 02:51 PM
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Zulu. Next time you drill off set trunnion holes, you might try drilling them while your stock is still square.
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post #27 of 62 (permalink) Old 02-19-2019, 03:25 PM Thread Starter
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Zulu. Next time you drill off set trunnion holes, you might try drilling them while your stock is still square.

I would never have been able to pull that off. I would be completely unable to figure out exactly where they had to be.
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post #28 of 62 (permalink) Old 02-20-2019, 12:11 PM
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This is a bit off topic of the wooden model, but in the sand cast mold, what are the cut outs to the side of the barrel for? It looks like you'd end up with excess iron making a weird handle on one side of the gun that runs most of the barrel length?

Also, looking at the spacers for the liner, are in the final cast piece? I mean, is the iron cast around the spacers? And if so, does that cause any weakness to the iron shell?
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post #29 of 62 (permalink) Old 02-20-2019, 12:27 PM Thread Starter
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Quote:
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This is a bit off topic of the wooden model, but in the sand cast mold, what are the cut outs to the side of the barrel for? It looks like you'd end up with excess iron making a weird handle on one side of the gun that runs most of the barrel length?

Also, looking at the spacers for the liner, are in the final cast piece? I mean, is the iron cast around the spacers? And if so, does that cause any weakness to the iron shell?



The spacers for the liner are called "chaplets". I was told by Jack Hern that "These melt in place and become one with the casting."


The cutouts you are seeing, I believe, are pathways for the molten iron to get to all parts of the barrel.


I wish Jack Hern would jump in here. I'm sure he could explain it better than me.


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post #30 of 62 (permalink) Old 02-20-2019, 01:22 PM Thread Starter
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Originally Posted by carbineone1964 View Post
You know Micheal.



You have inspired me to turn a Barrel in my Shop Smith Lathe when it warms. Might be kinda fun to try and see how I do. What kind of cheaper wood might be a good donor piece. For practice with the potential for disaster, I would not want to try anything in expensive wood first. Maybe just a cheap 4 foot post?



I am thinking a 1841 six pounder, maybe 1/3 scale. I really like the profile of the 1841.



Bruce,
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