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Author Topic: Original Blunderbuss Proof Testing the Barrel  (Read 4519 times)

Offline flatsguide

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Re: Original Blunderbuss Some machining on the barrel
« Reply #50 on: September 27, 2024, 07:17:53 AM »
Predrilling with a smaller diameter drill then boring that hole to the exact measured diameter of the drill is the best way I know of how to keep a drill from wandering, of course that means the drill point is ground properly. Looking at the drill that you will use for the final diameter, see what the length is for one complete twist of the drill, that should be the minimum depth of the bored hole.
Richard
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Offline davec2

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Re: Original Blunderbuss Some machining on the barrel
« Reply #51 on: September 27, 2024, 07:48:19 AM »
Thanks Richard.....will give that a try !!
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"No man will be a sailor who has contrivance enough to get himself into a jail; for being in a ship is being in a jail, with the chance of being drowned... a man in a jail has more room, better food, and commonly better company."
Dr. Samuel Johnson, 1780

Offline flatsguide

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Re: Original Blunderbuss Some machining on the barrel
« Reply #52 on: September 27, 2024, 05:20:36 PM »
Dave, you may want to try eBay for ‘gun drills’ you start them the same way I mentioned above. That would give you the straightest hole. Either way drill undersize and ream with an extension rod brazed to the reamer, if you need a better finished hole.
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Offline davec2

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Re: Original Blunderbuss Some machining on the barrel
« Reply #53 on: September 28, 2024, 03:16:23 AM »
Was waiting for the drill I ordered a week ago to start in on drilling out the bore to final diameter.  Started to call the company today to find out where the drill was in shipping.....then I realized that the outfit I ordered from was in Florida.....I'm sure they have more important things to do at the moment than to track down my order...... :o  Hope any and all of you in the southeast are doing OK !!!
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"No man will be a sailor who has contrivance enough to get himself into a jail; for being in a ship is being in a jail, with the chance of being drowned... a man in a jail has more room, better food, and commonly better company."
Dr. Samuel Johnson, 1780

Offline davec2

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Re: Original Blunderbuss Some machining on the barrel
« Reply #54 on: October 01, 2024, 06:14:20 AM »
The new bore drill arrived finally from Drills & Cutters in Florida...bad timing on my part to order the drill a few days before the latest hurricane blew into their neck of the woods.  However, it made it here safely.  Now I need to modify the drill for use on brass.  I will be out of the shop for a few of weeks (other contract work to do) so I will pick this up again in early November.



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"No man will be a sailor who has contrivance enough to get himself into a jail; for being in a ship is being in a jail, with the chance of being drowned... a man in a jail has more room, better food, and commonly better company."
Dr. Samuel Johnson, 1780

Offline Justin Urbantas

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Re: Original Blunderbuss Some machining on the barrel
« Reply #55 on: October 01, 2024, 05:18:11 PM »
What do you have to do to modify the bit?
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Offline davec2

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Re: Original Blunderbuss Some machining on the barrel
« Reply #56 on: October 02, 2024, 07:20:12 AM »
Justin,
Ground as it is now, with a positive rake to the cutting edges, the drill will grab and dig in deeper than it should…. Especially since I have drilled a pilot hole and the center point of the drill will not do any cutting. I will use a stone and very slightly flatten both cutting edges so that instead of any acute angle on the cutting edges both will be at near 90 degrees. This will drill fine in brass without grabbing but the drill will need to be re-sharpened if I want to drill anything else with it.
« Last Edit: October 04, 2024, 06:09:54 PM by davec2 »
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"No man will be a sailor who has contrivance enough to get himself into a jail; for being in a ship is being in a jail, with the chance of being drowned... a man in a jail has more room, better food, and commonly better company."
Dr. Samuel Johnson, 1780

Offline davec2

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Re: Original Blunderbuss Some machining on the barrel
« Reply #57 on: October 25, 2024, 07:23:40 AM »
Back in town for a bit and wanted to get a few more things done.  Prepared the drill for drilling the bore.  Knocked back the cutting edge to a 90 degree rake angle......






Started the prep on the trigger guard casting........Had to use some brass colored silver solder to patch a couple of casting voids.....








One of two options for the stock wood I will use.......



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"No man will be a sailor who has contrivance enough to get himself into a jail; for being in a ship is being in a jail, with the chance of being drowned... a man in a jail has more room, better food, and commonly better company."
Dr. Samuel Johnson, 1780

Offline davec2

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Re: Original Blunderbuss Some machining on the barrel
« Reply #58 on: October 25, 2024, 06:14:15 PM »
By the way.....I usually change the title of my posts to reflect whatever has happened next on a given project.  I have never had any trouble doing that.  However, on this post, every time I try to update the title of the thread I get this........





I have tried everything my limited computer knowledge will allow to get around this, but to no avail.  I asked Dennis for some "adult supervision" but he came up blank as well.  Anyone else have a problem like this.....or have any ideas about what might be wrong (with me or otherwise... :o )?

Thanks
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"No man will be a sailor who has contrivance enough to get himself into a jail; for being in a ship is being in a jail, with the chance of being drowned... a man in a jail has more room, better food, and commonly better company."
Dr. Samuel Johnson, 1780

Offline Daryl

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Re: Original Blunderbuss Some machining on the barrel
« Reply #59 on: October 25, 2024, 07:31:55 PM »
Sorry Can't help, but I've gotten that page before as well. Sometimes a second or third attempt has worked.
My memory on this is not good.
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Daryl

"a gun without hammers is like a spaniel without ears" King George V

Offline Justin Urbantas

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Re: Original Blunderbuss Copy Progress
« Reply #60 on: October 26, 2024, 04:44:03 AM »
Hey Dave. Where do you find that brass coloured silver solder?  Is it high temp? Thanks
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Offline davec2

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Re: Original Blunderbuss Copy Progress
« Reply #61 on: October 26, 2024, 04:46:33 AM »
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"No man will be a sailor who has contrivance enough to get himself into a jail; for being in a ship is being in a jail, with the chance of being drowned... a man in a jail has more room, better food, and commonly better company."
Dr. Samuel Johnson, 1780

Offline Bob Gerard

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Re: Original Blunderbuss Copy Progress
« Reply #62 on: October 26, 2024, 05:21:06 AM »
This will be one for the history books 🙂
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Offline Daryl

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Re: Original Blunderbuss Copy Progress
« Reply #63 on: October 26, 2024, 05:22:38 AM »
"Liquidus Temperature: 1,330°F (721°C)"
Pretty much says it all, along with: " This solder contains approximately 38% silver"
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Daryl

"a gun without hammers is like a spaniel without ears" King George V

Offline davec2

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Re: Original Blunderbuss Copy Progress
« Reply #64 on: October 26, 2024, 07:15:53 AM »
Got the brass barrel finish machined today.  Here are a few photos....Drilling, reaming, sculpting the muzzle, etc.  Will need to make the breach plug and lugs next.





















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"No man will be a sailor who has contrivance enough to get himself into a jail; for being in a ship is being in a jail, with the chance of being drowned... a man in a jail has more room, better food, and commonly better company."
Dr. Samuel Johnson, 1780

Offline Pukka Bundook

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Re: Original Blunderbuss Copy Progress
« Reply #65 on: October 26, 2024, 04:26:28 PM »
Very bonny work, Dave!  a grand job.

 A Lovely barrel was hiding in that great chunk of brass stock!
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Offline flatsguide

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Re: Original Blunderbuss Copy Progress
« Reply #66 on: October 26, 2024, 05:45:08 PM »
You turn the coolest finials on all your work.
Richard
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Offline Justin Urbantas

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Re: Original Blunderbuss Copy Progress
« Reply #67 on: October 26, 2024, 05:55:07 PM »
Thanks Dave. Very nice looking barrel.
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Offline Justin Urbantas

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Re: Original Blunderbuss Copy Progress
« Reply #68 on: October 26, 2024, 10:35:53 PM »
what do you use for flux with that brass solder? Does standard plumbing flux work?
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Offline davec2

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Re: Original Blunderbuss Copy Progress
« Reply #69 on: October 27, 2024, 12:05:50 AM »
Justin,

I use the same high temperature borax flux I use for hard silver soldering / brazing.  The solder has to be able to withstand a temp higher than the liquidus temperature of the braze alloy....otherwise it will just burn away.

https://ramweldingsupply.com/p/harris-stay-silv-white-brazing-flux/?msclkid=fc0b12fcc61a101c7eef75e19f6cccaa&utm_source=bing&utm_medium=cpc&utm_campaign=**LP%20Shop%20-%20Catch%20All&utm_term=4586406602253431&utm_content=Catch%20All
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"No man will be a sailor who has contrivance enough to get himself into a jail; for being in a ship is being in a jail, with the chance of being drowned... a man in a jail has more room, better food, and commonly better company."
Dr. Samuel Johnson, 1780

Offline Daryl

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Re: Original Blunderbuss Copy Progress
« Reply #70 on: October 27, 2024, 03:45:10 AM »
I think that's the same stuff I bought locally at Praaxair shop.  If you use a motor and pestle, Justin, you can grind up some borax and make your own
just with the addition of water.  I did.
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Daryl

"a gun without hammers is like a spaniel without ears" King George V

Offline Justin Urbantas

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Re: Original Blunderbuss Copy Progress
« Reply #71 on: October 27, 2024, 05:03:23 AM »
Oh yeah. I have a bunch of borax from making laundry soap, and for forge welding flux.
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Offline davec2

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Re: Original Blunderbuss Brass Barrel Machining Complete
« Reply #72 on: October 28, 2024, 04:07:32 AM »
I will need to proof this barrel before I go too far with the build.  It is a 7 bore.  It's made out of better material than the original (I'm fairly sure) and the bore is slightly smaller (i.e. thicker walls), so it should be fine.  However, anyone know what a 7 bore proof charge should be ?
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"No man will be a sailor who has contrivance enough to get himself into a jail; for being in a ship is being in a jail, with the chance of being drowned... a man in a jail has more room, better food, and commonly better company."
Dr. Samuel Johnson, 1780

Offline davec2

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Re: Original Blunderbuss Brass Barrel Machining Complete
« Reply #73 on: October 28, 2024, 04:31:11 AM »
#@!! $#@* !!!!  Just found the British Gun Barrel Proof Act of 1868.......here is an excerpt ......





For a 7 bore, look at the powder and projectile weights required for a first and second proof !!!!!!  I want to proof the barrel but this looks more like I'm making a pipe bomb !!!
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"No man will be a sailor who has contrivance enough to get himself into a jail; for being in a ship is being in a jail, with the chance of being drowned... a man in a jail has more room, better food, and commonly better company."
Dr. Samuel Johnson, 1780

Offline taterbug

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Re: Original Blunderbuss Brass Barrel Machining Complete
« Reply #74 on: October 28, 2024, 06:59:26 AM »
more like a pop-off valve for a powder magazine?  that slug will only have about 6 inches of barrel to get up to any sort of speed...

i bet she'll make one heck of a flash :o

will u make a video?
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