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This explains
https://www.instructables.com/id/How-to-Sharpen-Used-and-Dull-Drill-Bits-By-Hand/
A drill doctor will sharpen up to 3/4" twist drills and create a chisel point if desired. After 55 years of sharpening by hand I bought a Drill Doctor 750EX as I have no longer access to my machine shop diamond wheels. One may limit the metal removal, and new diamond sharpening wheels for the DD are cheap.
At 144 bucks delivered and ability to change away from 118° it is well worth it. I had nothing to sharpen my masonry carbide twist drills and it does a fine job on them also..
So one off the statements is the twist drills wear out and am going to drill a lot of holes.
Here is a small part of the explanation.
![which angle .jpg which angle .jpg](https://www.steelsoldiers.com/data/attachments/523/523549-6bc4ab6cbd62f5cc9cc6b4563ac91dd8.jpg)
https://www.instructables.com/id/How-to-Sharpen-Used-and-Dull-Drill-Bits-By-Hand/
A drill doctor will sharpen up to 3/4" twist drills and create a chisel point if desired. After 55 years of sharpening by hand I bought a Drill Doctor 750EX as I have no longer access to my machine shop diamond wheels. One may limit the metal removal, and new diamond sharpening wheels for the DD are cheap.
At 144 bucks delivered and ability to change away from 118° it is well worth it. I had nothing to sharpen my masonry carbide twist drills and it does a fine job on them also..
So one off the statements is the twist drills wear out and am going to drill a lot of holes.
Here is a small part of the explanation.
![which angle .jpg which angle .jpg](https://www.steelsoldiers.com/data/attachments/523/523549-6bc4ab6cbd62f5cc9cc6b4563ac91dd8.jpg)
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