Beginner needs help finding bits! - Router Forums
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post #1 of 14 (permalink) Old 06-07-2017, 09:20 AM Thread Starter
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Default Beginner needs help finding bits!

Hello everyone!

I have a few questions about finding an appropriate router tip to inlet barrels for custom muzzle loading rifles.
To start off I have almost no experience with the terminology of router tips and I do not want to buy a tip that cuts differently than I interpreted. I have some experience woodworking and plenty of experience with power tools so I am not a complete dope, haha!
So here's the problem I am facing.
I need to inlet an octagonal barrel. I am unable to find any (maybe you guys know where to find one?) octagonal cutting tips for a router so I need to improvise.
The total with of the barrel is 15/16 and each octagon flat is 3/8" wide, so I should be able to cut that with a (I THINK its called mortising) straight cut bit to the appropriate depth and then use a 45 degree angle bit at 3/8 to get the oblique (angled) octagons.
What is a a straight 45 degree bit called?
IF anyone has some other ideas please put them forth! I am always open to hear other's ideas and adapt.

Thanks guy!
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post #2 of 14 (permalink) Old 06-07-2017, 09:54 AM
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Welcome to the forum. The 45* bit is usually called a chamfer bit. It also comes in other angles. Most have a bearing on the tip but you want one without. You can remove them and grind off any projection. Try searching the major bit makers like Freud, Cmt, Whiteside, and Amana. They have the largest selections and all have online catalogs.

Whiteside will also custom make you a bit to your specs, for a price of course. One other option is to use a mouldings head on a table saw. Corob Cutter could grind you a set of cutters that would allow you to make the profile in one (the custom Whiteside bit would too). The problem with most stock chamfer router bits is that they will be too wide so look at the bit specs carefully.
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post #3 of 14 (permalink) Old 06-07-2017, 09:59 AM
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magnate.net also does custom grinds

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post #4 of 14 (permalink) Old 06-07-2017, 10:24 AM
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Quote:
Originally Posted by SuperSpec View Post
Hello everyone!

I have a few questions about finding an appropriate router tip to inlet barrels for custom muzzle loading rifles.
To start off I have almost no experience with the terminology of router tips and I do not want to buy a tip that cuts differently than I interpreted. I have some experience woodworking and plenty of experience with power tools so I am not a complete dope, haha!
So here's the problem I am facing.
I need to inlet an octagonal barrel. I am unable to find any (maybe you guys know where to find one?) octagonal cutting tips for a router so I need to improvise.
The total with of the barrel is 15/16 and each octagon flat is 3/8" wide, so I should be able to cut that with a (I THINK its called mortising) straight cut bit to the appropriate depth and then use a 45 degree angle bit at 3/8 to get the oblique (angled) octagons.
What is a a straight 45 degree bit called?
IF anyone has some other ideas please put them forth! I am always open to hear other's ideas and adapt.

Thanks guy!
First of all the angle is not 45deg. but more like 67.5 degrees if I am not mistaken.
Octagon - math word definition - Math Open Reference

If I understand you correctly, you want to cut a groove for the barrel in the stock, and have one flat spot on the barrel at the bottom of the groove, then a 67.5 degree cut on each side degree sloping cut on each side of the flat. That would only give you 3 flats in the stock. If you wanted more it gets complicated.
This bit would give you the correct angle :
https://www.amazon.com/135-degree-ro...20router%20bit

That said, and not being a gunsmith, I would cut a half round slot and use Epoxy to bed the barrel. For one reason, if the barrel is attached to the receiver exactly with the octagon centered on the axis of the receiver,it will match the octagon cut out, but any little bit rotated off center will cause the barrel not to seat right in the stock.
Just my 2 cents.
Herb
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post #5 of 14 (permalink) Old 06-07-2017, 10:38 AM
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Like Herb, I'm not a gunsmith, but a thought occurs to me (that alone is frightening ).
Doesn't the barrel heating up introduce possible distortions
from too close contact with the stock?
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post #6 of 14 (permalink) Old 06-07-2017, 10:39 AM
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I doubt you will find a router bit to completely do what you want. Might be able to "rough in" the barrel channel with a router, but fitting the barrel channel to the barrel requires specialized tools.

For bedding a barrel, the stock makers that I knew and those who did stock work for me utilized barrel bedding tools to fit the barrel to the barrel channel. Brownell's has them for both round and octagon barrels:

GUNLINE OCTAGON BARREL BEDDING TOOL | Brownells

Last edited by Ray Newman; 06-07-2017 at 11:06 AM.
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post #7 of 14 (permalink) Old 06-07-2017, 09:35 PM
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post #8 of 14 (permalink) Old 06-07-2017, 10:46 PM
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When I was in high school I worked for an old time gun smith. This was the late sixties. When he fitted wood stocks to rifle barrels he used a pear shaped bit 1/2 to 3/4 inch wide in a hand electric grinder. He just bussed the center out. We used micro bed an kind of an epoxy mixture in the wood stock. We then coated the metal barrel and action with Johson&Johson past wax. You then mounted the barrel in the wet stock. The wax kept the barrel from sticking. The gunsmith was a believer in 8 pounds on the tip of the stock so we added a weight hanging off the end of the stock until the micro bed dryed. The micro bed will take shape to the barrel and action. These were all high powered rifles not black powder.
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post #9 of 14 (permalink) Old 06-08-2017, 12:04 AM
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Quote:
Originally Posted by Ray Newman View Post
For bedding a barrel, the stock makers that I knew and those who did stock work for me utilized barrel bedding tools to fit the barrel to the barrel channel.
Yup. I know one custom gun maker, and I mean big bucks custom guns. He makes stuff from scratch, including a double barrel 2ga rifle awhile back. Made everything but the brass - and that was $10 a round, for empty brass. Makes mostly BP rifles, and stocks done by hand.

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post #10 of 14 (permalink) Old 06-08-2017, 01:53 AM
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Read this. Notes on Inletting the Barrel It will clarify a lot of things. It does say inletting 'can' be done with a router, but does not recommend it, too much chance of something going awry. I do love my router, but wouldn't get one near a project like a 'custom' BP rifle.

By the way, you say 'custom' rifles. What exactly do you mean by that? A kit you finish? Build just the stock? Build all but the barrel? What?

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