Technics 45 record spindle adapters

Rediscovering turntables and vinyl. Picking up used ones to explore, but they frequently are missing the center 45 rpm record adapter. I found 3 really cool ones here (out of many), but found that they variously wanted some tweaking to fit the 3 Technics turntables I have as examples, and actual 45 records. For posterity, I will record my findings of 7.28mm as the ideal center hole, and 38mm as the ideal outer diameter to fit the 45 record center hole. Also, matching two Technics adapters I have shooting for about an 8.85mm height for aesthetics and ease of grabbing to remove.

So, I designed nothing here, just remixed these fine examples to these specs for my purposes, and hopefully useful to others as well. I can't decide which one I like better!

So, these may turn out slightly tight on the spindle off the printer, but I like that so some modest cleanup with a loose drill bit (just turn by hand in the hole) lets you tune in a perfect fit, slides on/off easily, no wiggle.

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