Author Topic: trimming thimbles  (Read 5446 times)

Offline frenchman

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trimming thimbles
« on: February 21, 2014, 05:52:22 AM »
help :'(
 somewhere on this site , somebody had made himself a tool to trim thimbles , ???
Denis

Offline D. Taylor Sapergia

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Re: trimming thimbles
« Reply #1 on: February 21, 2014, 05:56:07 AM »
How about a file?  ..a hacksaw?  ...a lathe?  I don't mean to sound factitious, but I can't imagine what difficulty you might be having.
D. Taylor Sapergia
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Offline frenchman

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Re: trimming thimbles
« Reply #2 on: February 21, 2014, 07:32:53 AM »
want to place some bands and would like to make them even , i know it's not major just want to make them the same and maybe save some time for the future ones
thanks
Denis

Offline Mark Elliott

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Re: trimming thimbles
« Reply #3 on: February 21, 2014, 07:39:28 AM »
I just use a triangular needle file to create bands and don't worry if they are not quite even.  I have yet to see originals that were. 

Offline Acer Saccharum

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Re: trimming thimbles
« Reply #4 on: February 21, 2014, 07:27:21 PM »
Peruse this tutorial, maybe something you can use:

http://americanlongrifles.org/forum/index.php?topic=687.0
Tom Curran's web site : http://monstermachineshop.net
Ramrod scrapers are all sold out.

Offline David Rase

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Re: trimming thimbles
« Reply #5 on: February 21, 2014, 09:54:22 PM »
Frenchman,
I use a small machinists square and a file to square up the ends of my thimble blanks.  After they are square, I use my 6" dial calipers to scribe radial lines on the thimble blanks on the outsides of my bands.  I use the ends of the thimbles as a guide for the calipers.  I don't have any photos of the scribing but I do have a couple of a set of thimbles being made.
David

After scribing the lines I use a jewelers saw to cut some grooves using the scribed lines as a guide.  These grooves define the edges of the bands.  The saw blade also works as a depth gage.


Using a combination of jewelers files, triangle, square, flat with a safe side, I file the bands.


The rough filed blank


The finished set ready for inletting into a pistol stock.
 

Offline Acer Saccharum

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Re: trimming thimbles
« Reply #6 on: February 21, 2014, 09:57:15 PM »
That's too much work, Dave. Can I buy those from you?
Tom Curran's web site : http://monstermachineshop.net
Ramrod scrapers are all sold out.

Offline Acer Saccharum

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Re: trimming thimbles
« Reply #7 on: February 21, 2014, 10:00:39 PM »
Rase, I added your 'mini tutorial' to the thimble tutorial link above. Excellent workmanship.
Tom Curran's web site : http://monstermachineshop.net
Ramrod scrapers are all sold out.

Offline David Rase

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Re: trimming thimbles
« Reply #8 on: February 21, 2014, 11:20:30 PM »
That's too much work, Dave. Can I buy those from you?
Sure, but they come attached to a pistol. ;D

Offline frenchman

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Re: trimming thimbles
« Reply #9 on: February 21, 2014, 11:35:16 PM »
HAAA! HA!! i knew that i saw something about thimble
thank you
 exactly what i was looking for
Denis

Offline Long John

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Re: trimming thimbles
« Reply #10 on: February 23, 2014, 04:39:05 AM »
Frenchman,

Take a block of wood that you can clamp in your vise and install a dowel in it that has the same diameter as your ramrod.

Find some washers that have a hole large enough that your ramrod pipe can go inside.  Select washers that are the thickness of the spacing you want for your rings.

Plop a washer onto the block with the dowel through the hole.  Stick the ramrod pipe over the dowel so it fits into the hole of the washer.  Now take your 3-corner file and hold it against the washer while you file your first ring. When that ring is done add a washer and file the second ring, etc., etc.

A nice ramrod pipe can be made up in 15 to 20 minutes with nice evenly spaced, uniform rings on the ends.



That's how I did the rings on the pipe pictured above.

Best Regards,

John Cholin

Offline flehto

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Re: trimming thimbles
« Reply #11 on: February 23, 2014, 05:45:42 PM »
To "draw" the lines for the bands onto the pipe bbl, I first just scribe  short lines on the inked pipe bbl  and then push the pipe onto a tight fitting mandrel and chuck in the drill press.  A very sharply pointed pin is held in an adjustable block and the short LO lines are  aligned and the pointed pin is held against the brass pipe bbl and the chuck is rotated by hand.  When a deep groove is achieved, the next short line is picked up and another groove is cut, etc.

These grooves guide a small trianular file  for the  the start of the bands...very uniform spacing is the result. A jeweler's saw sounds good...will have to try that.....Fred

Offline smallpatch

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Re: trimming thimbles
« Reply #12 on: February 23, 2014, 05:57:24 PM »
Frenchie,
I think you're talking about the mandrel and file guide that Dave Keck from Knob Mountain has available. They work great.
In His grip,

Dane

Offline J. Talbert

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« Last Edit: May 08, 2020, 04:06:31 AM by J. Talbert »
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