T-Nut, for 2020 profile, printable, drop in
by ttsalo, published
A "hammer-style" printable T-nut for Misumi 2020 alu profile (commonly used in MendelMax), can be inserted into the groove from the side instead of having to slide it from the end.
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Print, drill out the hole to 2.5 mm, insert into the profile, screw in a M3 machine screw. The T-nut should automatically turn 90 degrees and stop. Machine screws probably won't work with ABS (too soft), but I used polycarbonate at 300 C and holding the spool arms and more seems to be no problem at all with regular M3 screws.
Print with a brim, otherwise these will easily get knocked off by the print head.