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Old 09-18-2013, 08:19 AM   #1 (permalink)
 
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Default Pair of .270's and GREAT assembly tip!

A recent pair of .270's topped with Saskatchewan mule deer antler. Nothing spectactular, but I wanted to share an assembly tip that made these so much easier than ones I've made in the past.

In the past, I've ruined transmissions when pressing, because the brass tube could not expand into the solid brass rim area of the casing. Before making these pens, I came across this tutorial:

http://www.stickermetimbers.com/Tuto...20Tutorial.pdf

The author describes use of a home-made swaging tool to overcome this problem. I used an "F" drill bit installed backwards in my drill chuck in the tailstock as my swaging tool. With the bare 7mm brass tube installed in my collet chuck, a little 3-in-1 oil on the shaft end of the drill bit, it worked perfectly to expand the end of the brass tube to allow the transmission to slip in easily.

After swaging, I use JB Weld to glue my projectile and 7mm brass tube in place. The transmission slipped in past the solid rim, and pressed in easily after that first try - no damage.




As always, comments/critiques are welcome!
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Last edited by juteck; 09-18-2013 at 09:01 AM.
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Old 09-18-2013, 09:26 AM   #2 (permalink)
 
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Nice pens and thanks for the tutorial address. I will check that out more thoroughly. The problem I have ran into lately is the brass tube does not fit snugly enough on the top of the transmission and slips when turned to the lock position. By lock position, I mean the position where you feel the little bump when extending the ink cartridge, so it stays extended when writing. I've "fixed" it by roughing up a spot on the transmission and putting a little dab of JB Weld there. Not a good fix though.
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Old 09-18-2013, 09:39 AM   #3 (permalink)
 
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All you need to do is ream the installed 7 mm tube with a 1/4" drill bit.

Les
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Old 09-18-2013, 09:42 AM   #4 (permalink)
 
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Quote:
Originally Posted by PaulDoug View Post
Nice pens and thanks for the tutorial address. I will check that out more thoroughly. The problem I have ran into lately is the brass tube does not fit snugly enough on the top of the transmission and slips when turned to the lock position. By lock position, I mean the position where you feel the little bump when extending the ink cartridge, so it stays extended when writing. I've "fixed" it by roughing up a spot on the transmission and putting a little dab of JB Weld there. Not a good fix though.
All you need to do is "Dimple" the brass tube with the pointed end of a small sized transfer punch to get the over-sized tube to fit snug over the transmission.

Les
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Old 09-18-2013, 10:31 AM   #5 (permalink)
 
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Thanks Les, now why didn't I think of that??
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Old 09-18-2013, 10:44 AM   #6 (permalink)
 
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Quote:
Originally Posted by rd_ab_penman View Post
All you need to do is ream the installed 7 mm tube with a 1/4" drill bit.

Les

BINGO!
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Old 09-18-2013, 10:48 AM   #7 (permalink)
 
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Quote:
Originally Posted by rd_ab_penman View Post
All you need to do is ream the installed 7 mm tube with a 1/4" drill bit.

Les
Another GREAT idea. I'll give this one a try next time!
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Old 09-18-2013, 10:51 AM   #8 (permalink)
 
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Quote:
Originally Posted by rd_ab_penman View Post
All you need to do is ream the installed 7 mm tube with a 1/4" drill bit.

Les
I use a 1/4" straight reamer just to the point past the solid brass in the casing.

Lin
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