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Mar 29th, 2024
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Joined: Jan 2002
Posts: 9,739 Likes: 742
Sidelock
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Sidelock
Joined: Jan 2002
Posts: 9,739 Likes: 742 |
Think Ill pick up a spare set of DeMoya barrels, $30 seems very worth it....
Best,
Ted
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Joined: Oct 2015
Posts: 593
Sidelock
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OP
Sidelock
Joined: Oct 2015
Posts: 593 |
The Tobin bolting is not at all a rotary bolt a la A.T. Brown. It is a bolt that rotates horizontally. See Part # 16 --
Thank you Reasearcher.
I have not seen any where a diagram of the actual working of this Tobin bolting system.
I can sort of imagine those parts together to hook over the square hole in the rib extension & hold it down, a bit like an L C Smith.
What I cannot see is any taper or other way it takes up wear & remains tight like a Smith.
Does anyone have a cut away drawing of the assembled action bolting system ?
O.M
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Joined: Jun 2006
Posts: 2,966 Likes: 293
Sidelock
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Sidelock
Joined: Jun 2006
Posts: 2,966 Likes: 293 |
Moses, Its a single bolting design.
Part 16 rotates through the barrel extension holding the gun closed.
That part evolved in shape over time.
I have a Canadian 16 bore apart on my bench, and part #16 is shaped like a Rhombus not a nautilus.
Out there doing it best I can.
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Joined: Oct 2015
Posts: 593
Sidelock
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OP
Sidelock
Joined: Oct 2015
Posts: 593 |
So then it does accommodate a bit of wear & stay tight ?
O.M
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Joined: Jun 2006
Posts: 2,966 Likes: 293
Sidelock
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Sidelock
Joined: Jun 2006
Posts: 2,966 Likes: 293 |
Sure.
The hook just keeps working deeper, and the top lever keeps heading toward/past center.
There is quite a beefy coil spring #59 pushing the hook around into the bite on the one I have apart.
Last edited by ClapperZapper; 02/16/19 06:13 PM. Reason: Checked parts drawing
Out there doing it best I can.
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Joined: Jan 2002
Posts: 5,883 Likes: 106
Sidelock
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Sidelock
Joined: Jan 2002
Posts: 5,883 Likes: 106 |
The hole through the rib extension is tapered on the bottom and back sides and the bolt is tapered to match.
The system is somewhat similar to the Frank Hollenbeck bolting used by Baltimore Arms Co. and then his companies up in West Virginia, Hollenbeck/Three-Barrel/Royal Gun Co.
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Joined: Jan 2002
Posts: 9,739 Likes: 742
Sidelock
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Sidelock
Joined: Jan 2002
Posts: 9,739 Likes: 742 |
So then it does accommodate a bit of wear & stay tight ?
O.M Until ammunition with big numbers gets used in the gun. Then, the frame bends. Best, Ted
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Joined: Dec 2001
Posts: 12,743
Sidelock
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Sidelock
Joined: Dec 2001
Posts: 12,743 |
Thanks for the parts breakdown Researcher.
With the bolt tapered on both the bottom & back side, it should add a good deal of reinforcement to prevent frame bending. Most double gun frames are up to the load without a top fastener of any type.
Miller/TN
I Didn't Say Everything I Said, Yogi Berra
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Joined: Jan 2002
Posts: 9,739 Likes: 742
Sidelock
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Sidelock
Joined: Jan 2002
Posts: 9,739 Likes: 742 |
Thanks for the parts breakdown Researcher.
With the bolt tapered on both the bottom & back side, it should add a good deal of reinforcement to prevent frame bending. Most double gun frames are up to the load without a top fastener of any type. One would think. But, every, single Tobin for sale on the web at the moment looks exactly like this:  The photog went out of his way to camouflage the fact that this is a sick gun. Id be willing to bet the pin and lump have almost no wear. Few of them do. But, a lot of Tobins, look just like this. Best, Ted
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Joined: Oct 2015
Posts: 593
Sidelock
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OP
Sidelock
Joined: Oct 2015
Posts: 593 |
As well as the top lever being way out in left field an atrocity has been committed on that rib extension.
Also the action is over to the left or the barrels are to the right of the action.
Seen enough.
O.M
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