I reprinted it in NylonX with a 0.6mm nozzle and smaller holes for the brass inserts I had. Turned out great. My first time using heat-set inserts. I may never go back to tapping plastic.
T-Handle Hex Bit Driver (REV 2, Parametric))
Revision 2 reworks CAD and adds square nuts. T-handle for a magnetic bit driver. Fusion360, step, and stl files.
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updated December 8, 2024
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Printed May 27, 2023 in Raise3D ASA. (Unfortunately my M3 heat-set inserts are too small so I either need to order larger ones or re-print.)
@MarkMoran_259184 Cheers for my first make and follow! I use 4.6 or 4.7 for all my heat set insert holes. I've borrowed these values from inspecting Voron parts. They are designed for ABS part shrinkage, so I'm surprised that your ASA part had a loose fit. I pulled several inserts from my stash and measured 4.99 to 4.98 mm diameter. To be clear, the inserts should have 5 mm diameter, are 4 mm long, and mate with M3 threads: M3x5x4. If you let me know all the sizes and specifications, I can post a custom download.
@FlyingGyroscope Thanks! I just ordered the wrong inserts. Your description said M3x4x5, but I ordered the brass ones that Adafruit sells that are listed as M3x4 and M3x3. I noticed that was just specifying a height/length, so I guessed that maybe all M3 inserts have the same outside diameter. But now I see that Amazon sells M3 nuts in several different diameters. The ones I got from Adafruit are only 4mm at their widest point, so I'd need to print with 3.7mm holes or so. Or just order the bigger inserts.
As for ASA shrinkage, so far I've had great results holding tight tolerances. I haven't used inserts yet but I have done several projects where I printed a 4mm hole and had it come out within 0.1mm of the correct size and then tapped it for M5 screws which worked great.
I may also try reprinting your design with PC and NylonX, both of which I think are more durable than ASA. Thanks again for the cool models.