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Post by ET on Jun 12, 2019 23:10:29 GMT -5
To start with I ended up with 2-different sets of knurling wheels, one standard and one metric. The metric only has 6mm hole so I tried to drill them to .250" but only managed to drill one and the other a partial hole for .250". So I thought I would try to press fit the one that I could only partial drill. Took a bit of banging but I got on. Then I just had to give the tool a whirl. Three knurled at .454" without sizing and the one on the far right is knurl with a file. I just love turning the wheels with the variable drill setup. Again a special thanks to dannoboone for his help with this project. Because of this working with a tight press-fit knurling wheel I'm going to try to make a shaft to accommodate the .250" holed knurling wheel. This way also if I want to remove it for some reason the option will always be there. Anyway here is the first result without the follow-up use of a sizing die.  This will still be an ongoing project and hope something I've shared will be helpful to some one else, like the help I received from dannoboone. Ed |
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Post by rambler on Jun 13, 2019 4:19:35 GMT -5
Nice job!
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Post by jims on Jun 13, 2019 6:55:21 GMT -5
Those came out well.
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Post by Deleted on Jun 13, 2019 8:52:58 GMT -5
Are those for a 45,with or without sabots?I do mine by hand and look like the last one on the right.Other 3 look great.
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Post by joelmoney on Jun 13, 2019 11:00:22 GMT -5
Thanks for sharing! I am thinking of knurling some bullets and your tool looks like it gets more uniform results than a file.
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Post by ET on Jun 13, 2019 11:25:51 GMT -5
Okay I couldn't sit around on this rainy day so made a shaft for press fitting the standard knurling wheel. Done and gave it a whirl. When I changed over to the standard knurling wheel I forgot to reset my depth stop. and the first bullet came out at.457". okay one for the resizing die, chuckle. Now what I have noticed is that the knurling wheel with less number of teeth was more aggressive and quicker to do the knurl. Will note and post anything interesting if it develops. Ed  |
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Post by ET on Jun 13, 2019 11:31:02 GMT -5
Are those for a 45,with or without sabots?I do mine by hand and look like the last one on the right.Other 3 look great. This knurling operation was to increase diameter on .451" bullets because I use regular Harvester sabots that need a slightly larger diameter bullet to produce the load resistance I feel is best. Later on I will do some .40 cal. bullets for experimental purposes. Ed |
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Post by ET on Jun 13, 2019 11:38:51 GMT -5
Thanks for sharing! I am thinking of knurling some bullets and your tool looks like it gets more uniform results than a file. My pleasure. The first observation I have is using aluminum on the top half has a small flex when you lean into it. This is one change I would make if I knew this. It is not giving me any problems at the moment but I'll be watching this. As for the bottom half no mention found yet. Ed |
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Post by ET on Jun 14, 2019 6:17:44 GMT -5
First 20 Cycle Run
Ran my first group of 20-bullets and am very pleased with the results so far. By using the same technique of pressure and 4-5 quick cycles with the drill I produced 15-bullets at .454” and 5-bullets at .4545. I mic’d every bullet about 3-4 times at different locations to make sure the knurling was consistent. I did run the .4545” bullets through the sizing die but it was so easy it felt like it wasn’t worth the effort.
The top half of the tool felt like there was a very minor flex to it so for an improvement I will be looking for a stainless channel replacement for an upgrade. I believe that the knurling wheels are located to one side is causing this slight flex with the aluminum channel.
One coupler set screw did loosen at the start and was retightened a little harder. If this continues then a little blue lock-tite will be added.
So far, I am pleased with the initial results because knurling is no longer a laborious chore and the results are good. I even put away my file rig for now because of my confidence level with this prototype tool.
I will also monitor any wear or anomalies that might develop. All in all I believe I have a winner on my hands.
Ed
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Post by BuckDoeHunter on Jun 14, 2019 7:38:56 GMT -5
Nice knurling! I've often wondered how different knurling affects how bullets shoot, especially sabotless. I file knurl my .452 bullets before full form sizing them and I think your setup would be great for a very consistent knurl. Thanks for sharing.
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Post by dannoboone on Jun 14, 2019 11:53:10 GMT -5
Great work ET! Your machine puts my contraption to shame. Nice knurling! I've often wondered how different knurling affects how bullets shoot, especially sabotless. I file knurl my .452 bullets before full form sizing them and I think your setup would be great for a very consistent knurl. Thanks for sharing. I, too, was using files on .452's prior to full forming until a tooth broke off a file. When loading, the properly sized bullet stopped and became a "hammer down". Upon inspection at home, I saw that the tooth had reversed itself and dug into my wonderful Brux barrel. Thus the reason for properly knurling them after that experience. |
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Post by ET on Jun 14, 2019 14:54:14 GMT -5
Nice knurling! I've often wondered how different knurling affects how bullets shoot, especially sabotless. I file knurl my .452 bullets before full form sizing them and I think your setup would be great for a very consistent knurl. Thanks for sharing. Thanks for the kind expression but no thanks necessary. Before I left this board for a while it was about helping and sharing with others to get the best from their SML. This integrity of this board I will always support. Another believe I have is "what good can kept knowledge do once I'm 6ft under?". I look forward to what others have to share from their experience. The learning truly never stops. Ed |
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Post by ET on Jun 14, 2019 15:07:38 GMT -5
Great work ET! Your machine puts my contraption to shame. Nice knurling! I've often wondered how different knurling affects how bullets shoot, especially sabotless. I file knurl my .452 bullets before full form sizing them and I think your setup would be great for a very consistent knurl. Thanks for sharing. I, too, was using files on .452's prior to full forming until a tooth broke off a file. When loading, the properly sized bullet stopped and became a "hammer down". Upon inspection at home, I saw that the tooth had reversed itself and dug into my wonderful Brux barrel. Thus the reason for properly knurling them after that experience. You may call your tool a contraption but the absolute best concept was adapting the drill drive. I did 20 bullets within 20-mins including quick measurements. It so impressed me that I come to think of it as the dannoboone-driver. The time needed to originally use the file and then resize to the correct size was intensive and time consuming. Now it's a cake walk. Ed |
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Post by cuda on Jun 23, 2019 10:58:19 GMT -5
ET any pictures of how this works with the drill?
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Post by ET on Jun 23, 2019 12:59:20 GMT -5
ET any pictures of how this works with the drill? Cuda Here is the completed unit. The upper half of the hinged unit has the drive shaft with a knurling wheel compression fitted to it. Part of the shaft has a threaded end with a 1/4" nut. For adapting the drill I took a short 1/4" socket drive and cut off one end. Now fitting the drill to run a 7/16" socket that fits the 1/4"nut it's simply slide on the socket and with some pressure applied to the bullet I use 4-5 short burst with the drill. Hope that answers your question. Ed  |
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Post by cuda on Jun 25, 2019 9:18:22 GMT -5
Nice it looks good and does a nice job too. Where did you get it or did you make it?
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Post by ET on Jun 25, 2019 16:07:51 GMT -5
Nice it looks good and does a nice job too. Where did you get it or did you make it? I made the tool. Knurling with a file was starting to get frustrating and I wanted an easier process. A concept started to develop on building one and along with helpful suggestions from another member this is what emerged so far. Good-bye laborious knurling, hello playtime. Ed |
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Post by cuda on Jun 29, 2019 6:32:22 GMT -5
It is always nice to make things easier and faster to save time. It looks well made should last a life time.
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