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Offline Cannoneer

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Spinning mortar!
« on: August 04, 2012, 04:01:13 PM »
This is the full description that accompanied the photo: "Machining of Replica Civil War Cannon Barrel."
OK, machinists, what's going on here, is this thing being bored?




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Offline Frank46

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Re: Spinning mortar!
« Reply #1 on: August 04, 2012, 04:10:31 PM »
Yep vertical boring machine. Think I got that right. Frank
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Offline Doc Brown.

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Re: Spinning mortar!
« Reply #2 on: August 04, 2012, 06:46:26 PM »
Spinning mortar sounds like some kind of carnival ride. Maybe charge the kids to take a ride.
Whatever is going on in that picture looks big. Like something the Germans thought up during world war 2.
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Offline Victor3

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Re: Spinning mortar!
« Reply #3 on: August 04, 2012, 07:32:09 PM »
 The machine's called a vertical turret lathe. One of the most dangerous machine tools to operate regardless, but the way thay have the bbl clamped is downright scary. Hope they're not planning on a heavy cut.
 
 Can't tell from the picture what operation is being done but the setup would indicate that either the bore or that area near the muzzle is being machined.
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Offline Cat Whisperer

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Re: Spinning mortar!
« Reply #4 on: August 04, 2012, 11:56:10 PM »
Not often one even sees a vertical lathe, THANKS for posting the pix.

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Offline KABAR2

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Re: Spinning mortar!
« Reply #5 on: August 05, 2012, 05:01:08 AM »
It's quite possible that it is being bored the green square section above it may contain a boreing bar..... it looks llke a section near the muzzel has already been machined on the outside....... Where did you find this? would you share the link?
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Offline KABAR2

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Re: Spinning mortar!
« Reply #6 on: August 05, 2012, 07:18:39 AM »
Never mind I found it...... http://www.arcadiaindustrialcorp.com/aboutus.htm in the photo gallery....
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Mr president I do not cling to either my gun or my Bible.... my gun is holstered on my side so I may carry my Bible and quote from it!

Sed tamen sal petrae LURO VOPO CAN UTRIET sulphuris; et sic facies tonituum et coruscationem si scias artficium

Offline Cannoneer

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Re: Spinning mortar!
« Reply #7 on: August 05, 2012, 07:18:41 AM »
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RIP John. While on vacation July 4th 2013 in northern Wisconsin, he was ATVing with family and pulled ahead of everyone and took off at break-neck speed without a helmet. He lost control.....hit a tree....and the tree won.  He died instantly.

The one thing that you can almost always rely on research leading to, is more research.

Offline leesecw

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Re: Spinning mortar!
« Reply #8 on: August 05, 2012, 02:53:53 PM »
Thats a siege mortar. Nice!. Lots of noise and smoke. Aint cheap to shoot though
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Offline Artilleryman

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Re: Spinning mortar!
« Reply #9 on: August 05, 2012, 03:13:40 PM »
I can't tell what size siege mortar it is. 
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Offline Cannoneer

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Re: Spinning mortar!
« Reply #10 on: August 05, 2012, 07:00:00 PM »
Wouldn't the exposed elevating lugs dictate that it's meant to be a 13-inch seacoast/Navy mortar M1861?

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RIP John. While on vacation July 4th 2013 in northern Wisconsin, he was ATVing with family and pulled ahead of everyone and took off at break-neck speed without a helmet. He lost control.....hit a tree....and the tree won.  He died instantly.

The one thing that you can almost always rely on research leading to, is more research.

Offline Cat Whisperer

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Re: Spinning mortar!
« Reply #11 on: August 06, 2012, 12:01:43 AM »
That was my guess.

Another hint on scale is the ladder to the left.
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Offline seacoastartillery

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Re: Spinning mortar!
« Reply #12 on: August 06, 2012, 04:06:26 AM »
     They had one of these vertical lathes at Martin-Marietta Astronautics Group in Waterton, Colorado back in the 80s when Mike and I worked there.  They made 101" or 102" diameter rings on it for the Titan IV rocket as I recall.  Looks like a muzzle facing operation to me or possibly a boring op.

     Could this possibly be one of the two 13" Seacoast Mortars M1861 that the Paulson Bros. had made?

Tracy
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Offline 1Southpaw

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Re: Spinning mortar!
« Reply #13 on: August 06, 2012, 05:15:34 AM »
Wonder how the chips are removed .  Some sort of vacuum system?
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Offline Artilleryman

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Re: Spinning mortar!
« Reply #14 on: August 06, 2012, 07:49:56 AM »
Cannoneer is right in that the 13 inch seacoast mortar had open ratchets whereas the 8 & 10 inch siege mortars had enclosed ones.  I missed that detail along with the ladder when I first looked at this photo.

I agree with Tracy about ownership. To my knowledge the Paulsons are the only ones to reproduce a 13 inch seacoast mortars, so this is most likely one of theirs.  I was most fortunate to be able to crew one of these mortars.
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