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Post by frankenfab on Sept 14, 2019 12:42:20 GMT -5
Cut the first four flats, then broke out my Fowler v-blocks to cut the first 45. Technically, I set that up wrong. You should always do all your fixturing off your fixed vice jaw, the back jaw. So I should have had the v-blocks at the back, which would also have made it easier to see the clearance on the sides of the end mill. I only had about 1/16" to avoid hitting the v-block with the 1/2" tool.
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Post by frankenfab on Sept 14, 2019 12:43:10 GMT -5
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Post by clintsfolly on Sept 14, 2019 19:03:55 GMT -5
Looking good!
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Post by ezekiel38 on Sept 16, 2019 12:32:14 GMT -5
I'm impressed, loving this thread.
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scotth
.30 Stingray
Posts: 214
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Post by scotth on Sept 16, 2019 13:14:17 GMT -5
I'm impressed, loving this thread. me to its been nice seeing all the forum talk on the 327 and 32 cal. stuff lately.
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Post by rjm52 on Sept 16, 2019 20:42:27 GMT -5
Very impressive....thanks for sharing your wealth of knowledge with us...Bob
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Post by frankenfab on Sept 17, 2019 18:16:03 GMT -5
Well, thank you for saying "wealth of knowledge"!
I'm really not all that. I'm just trying to give something back.
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Post by frankenfab on Sept 21, 2019 7:18:53 GMT -5
Man, I miss my S&W Model 27....... I need to go a little deeper with the tool. That patch is 1/2 x 2 inches, and it took 10 minutes to cut. I'm limited by my spindle speed. 7500 rpm is the fastest spindle in our shop. That tool needs to be running at least twice that to perform at its full potential.
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Post by frankenfab on Sept 21, 2019 10:23:48 GMT -5
So todays progress was trimming, chamfering and crowning the barrel, removing the tool marks, and doing some checkering on a test piece.
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Post by frankenfab on Sept 21, 2019 12:45:35 GMT -5
Back to the barrel crown. It's a recessed 90 degree target crown, cut with nothing more that a very fresh 3/8" diameter 4 flute carbide end mill. It's not the prettiest, but I like it because it's completely protected, it's easy to do. And since the tool and bore face are parallel to each other, concentricity (axial alignment) between the tool and bore centeter doesn't matter as much. When you're cutting an angled crown, everything has to be perfect.
I think that's another reason why piloted crowning tools are popular. Besides eliminating the need for a lathe.
I do love the looks of the rounded crown, I think is called the Colt crown.
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Post by ddixie884 on Sept 22, 2019 1:08:35 GMT -5
Looks nice, so far...........
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Post by frankenfab on Sept 28, 2019 15:40:54 GMT -5
I have so much work in this barrel at this point, so I will test run all the engraving before doing it on the barrel. This will be on one side, logo is 1/4" tall, letters are .150" tall:
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Post by frankenfab on Sept 28, 2019 15:41:19 GMT -5
Waiting on new engraving bits to come in
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