Hi all - I've been following this thread for years, finally remembered to make an account and take a few pictures to share.
Kolacek's hole saw arbor post late last year motivated me to get around to making my own, which I've been planning ever since I discovered that a 11/16-18 nut will fit over a 5/8-18 external thread. In order to guarantee a solid fit between the arbor and the back of the hole saw, I mounted the drive pins on a left-hand nut, the top portion of which is a slip fit on the 3/4" shank to keep everything square.
The wrench flats were originally cut just to make the nut easier to hold in my mill vise to drill for the pins, but it turns out they're necessary to remove the hole saw after use, since it gets so torqued down while cutting. I admit I was in a bit of a rush with the bluing, so there are some light spots, I wasn't originally intending for it to look too pretty. One day I'll probably make another drive plate with the larger pin configuration, once I run into a project that needs a 3" hole saw in the mill.
Edit: looks like my images might not show up inline, album is here: https://imgur.com/a/o6mYr8o



Kolacek's hole saw arbor post late last year motivated me to get around to making my own, which I've been planning ever since I discovered that a 11/16-18 nut will fit over a 5/8-18 external thread. In order to guarantee a solid fit between the arbor and the back of the hole saw, I mounted the drive pins on a left-hand nut, the top portion of which is a slip fit on the 3/4" shank to keep everything square.
The wrench flats were originally cut just to make the nut easier to hold in my mill vise to drill for the pins, but it turns out they're necessary to remove the hole saw after use, since it gets so torqued down while cutting. I admit I was in a bit of a rush with the bluing, so there are some light spots, I wasn't originally intending for it to look too pretty. One day I'll probably make another drive plate with the larger pin configuration, once I run into a project that needs a 3" hole saw in the mill.
Edit: looks like my images might not show up inline, album is here: https://imgur.com/a/o6mYr8o
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