Author Topic: Another Kibler Colonial..... draw filing the barrel  (Read 804 times)

Offline davec2

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Another Kibler Colonial..... draw filing the barrel
« on: December 05, 2019, 02:58:14 AM »
Well.....I need another project like I need a hole in the head, but I just had to order one of Jim's Colonial rifle kits.  It arrived on Monday, snug in its crate and in perfect order.  Of course, I opened the box immediately just to make sure the US Post Office had not worked any of its usual magic on the contents.  All looked to be fine, so I removed all the parts and put them in a closet because I really, really don't have time to work on this anytime soon.

However.....I had an hour today and thought I would try and get the barrel draw filed.  Now right out of the crate, the barrel had the expected tool marks full length along all of the flats....not really deep but significant enough that I thought I might not be able to get all the draw filing done in the hour I had.  In addition, there was some discontinuity in the surfaces near the waist where the barrel was moved in the machine to complete the milling of each flat.  Again, no criticism here, I just thought it would take a little more time in those areas to get the surface discrepancy filed out.

Just for fun, I took out my phone and opened the stop watch function.  I hit the button on the stop watch and started in on one flat.  It went really well and when I finished I reached over and hit the "stop" button.....5 minutes and 35 seconds.  I timed each of the next four flats.....all less than 6 minutes.  All five primary flats draw filed in less than 30 minutes.  It went so quickly and well, I had time to finish up all eight flats...just for kicks.  ;)

One last point of interest....as I was sweeping up the steel filings on the bench and floor I looked over and saw a gram scale on my bench that I use for making detonators for explosive charges.  I weighed the steel filings to see how much metal I had removed......9.8 grams.  So just in case anyone else out there was wondering how much metal you are taking off draw filing a barrel, there is is......right about 1.1 grams for each flat on a 43" barrel.

So, the barrel is now back in the closet and I have returned to doing what I am supposed to be doing.  If I ever get a chance to put this one together, I will post the progress.
« Last Edit: December 05, 2019, 03:12:11 AM by davec2 »
"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 FALout

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Re: Another Kibler Colonial.....just the very start
« Reply #1 on: December 05, 2019, 03:07:34 AM »
I thought you might be posting how it only took you 6-1/2 hrs to complete it without finish.  Your a lot faster at draw filing then I am, think it would take me at least twice as long.
Bob

Offline Stoner creek

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Re: Another Kibler Colonial..... draw filing the barrel
« Reply #2 on: December 05, 2019, 03:51:59 AM »
Yep. I just draw filed one of those barrels today. It went a lot quicker than expected. I didnít time it because I was enjoying my coffee and paying close attention to my border collie but it couldnít have taken much more than an hour. I have the barrel going through the cold brown process now.
 So far I have 9 hours invested in this kit. It should be completed in another 6-8 hours. The only architectural changes that I have made are cheek piece molding and incised toe and forestock molding.
 There is a lot of wood left to work with in the breech, wrist, and toe areas. I think it might be fun some day to dive into that part and make some chips fly.
 The one thing that amazes me about these kits is how well the parts fit. In particular, the entry pipe. All of us who have spent time inletting an entry pipe can agree that this is a challenging and somewhat dreadful game. With the kit You can clean the casting flash off of Jimís entry pipe and simply push it into place. Amazing.

Offline Chowmi

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Re: Another Kibler Colonial..... draw filing the barrel
« Reply #3 on: December 05, 2019, 04:49:29 AM »
With the kit You can clean the casting flash off of Jimís entry pipe and simply push it into place. Amazing.

Well, well then, you got away easy with it!  I had to spend at least 20-30 seconds squaring up the CNC'd corners on the entry pipe finial inlet.  Talk about work!  :)

Norm
Cheers,
Chowmi

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Offline G_T

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Re: Another Kibler Colonial..... draw filing the barrel
« Reply #4 on: December 05, 2019, 07:02:02 AM »
Sounds like you found a pretty good file for the job! The file I've used leaves a super smooth surface but takes me well over an hour to get the job done. What are you using?

Thanks,
Gerald

Offline davec2

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Re: Another Kibler Colonial..... draw filing the barrel
« Reply #5 on: December 05, 2019, 08:11:05 AM »


"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 Jim Kibler

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Re: Another Kibler Colonial..... draw filing the barrel
« Reply #6 on: December 05, 2019, 06:40:28 PM »
Bahco are good files.  I use them here in the shop. 

Dave.  I figured you would have converted the metal filing weight to an average thickness of material removed!  ;)

The barrels generally look worse than they are.  The milling marks are usually quite shallow.  With a good file and technique, it's not a big job. 

Jason at Rice belt sands his usual barrels, but this doesn't work well for us as it's hard to control dimensions.  In time we may try to develop a way to improve surface finish, but for now drawfiling works pretty well.

All the best,
Jim

Offline BOB HILL

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Re: Another Kibler Colonial..... draw filing the barrel
« Reply #7 on: December 05, 2019, 07:29:11 PM »
Glad don't have to weigh my filings. I'd never find them in my shop. It's all i can do to find the tools I'm using. Got to clean up sometime.
Bob
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Offline davec2

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Re: Another Kibler Colonial..... draw filing the barrel
« Reply #8 on: December 05, 2019, 09:46:46 PM »
Jim,

The surface finish on the barrels is just fine.  After your comment, I did convert the 1.1 grams of steel removed per flat to a thickness.  Assuming an average flat width of 0.4", a barrel length of 43", and a density for mild steel of 0.2904 lbs / in^3, the 1.1 grams of steel removed per flat to clean up the surface equates to 0.00053" in thickness.  So, on average, the removal of a half a thousandth of an inch of material results in a smooth file finish with no remaining tool marks.  I wouldn't worry about improving the barrel surface finish .....especially if that process would cause you difficulty somewhere else in the manufacturing.  Besides, you really do need to leave us something to do on our end.....sense of ownership / pride of accomplishment and all that ... ;)
"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 Jim Kibler

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Re: Another Kibler Colonial..... draw filing the barrel
« Reply #9 on: December 06, 2019, 04:01:53 PM »
Neat information, Dave!  That depth of tool marks seems entirely reasonable.  Cool stuff.

Jim