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Old 12-06-2018, 05:18 AM   #1 (permalink)
 
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Default How might one best cut recesses inside a drilled

blank? My project consists of a drilled blank (either wood or plastic) with about a .6" ID. I want to use O-rings inside to retain a removable tube. I'd like the recesses for the O-rings to be at least .5" from either end of the blank. How would you go about cutting these? TIA for any suggestions!

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Old 12-06-2018, 05:30 AM   #2 (permalink)
 
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You'll have to make your own tool much like a peppermill recess cutter.
Check out the Sorby Crushgrind tool for the concept.
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Old 12-06-2018, 07:44 AM   #3 (permalink)
 
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You'll have to make your own tool much like a peppermill recess cutter.
Check out the Sorby Crushgrind tool for the concept.
Herb, yes, I see the concept. I'd like to see a close-up of the cutting edge of that tool. I have some .125" 1080 high carbon steel on hand that I think would work--I don't see that there will be too much stress on the tool. I've also got some .25" 1084 steel if that might be more appropriate. I'm thinking I could get away with just hardening the tip and leaving the rest "soft". Thanks for the suggestion and I welcome any feedback on the design of the tool.

Michael
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Old 12-06-2018, 08:03 AM   #4 (permalink)
 
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You could also grind allen wrenches.
Link to Wood Magazine article -- https://www.woodmagazine.com/woodwor...-tiny-turnings

The article has some drawings of the grind.

Bob
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Old 12-06-2018, 08:38 AM   #5 (permalink)
 
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or use hardened nails. Just shape the head.
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Old 12-06-2018, 09:27 AM   #6 (permalink)
 
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Bob and Cliff, thank you. Since this is likely a one-off project, I think this is the route I'll go. :-)
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Old 12-06-2018, 11:25 AM   #7 (permalink)
 
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Dental pick
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Old 12-06-2018, 01:56 PM   #8 (permalink)
 
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Yeah, come to think of it, a cut nail would be perfect for this project.
I have a big box here if you can't find some locally.
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Old 12-07-2018, 05:12 AM   #9 (permalink)
 
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Quote:
Originally Posted by Herb G View Post
Yeah, come to think of it, a cut nail would be perfect for this project.
I have a big box here if you can't find some locally.
I appreciate that, Herb. If I can't find some locally, I'll hit you up. Honestly didn't know they made "hardened" nails but it sounds perfect for this little tool.

Michael
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Old 12-07-2018, 06:56 PM   #10 (permalink)
 
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Quote:
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Quote:
Originally Posted by Herb G View Post
Yeah, come to think of it, a cut nail would be perfect for this project.
I have a big box here if you can't find some locally.
I appreciate that, Herb. If I can't find some locally, I'll hit you up. Honestly didn't know they made "hardened" nails but it sounds perfect for this little tool.

Michael
Masonry nail.

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