GuideHardware
3D printing replacement parts: what works, what lasts, what is legal
Printed parts are weakest across layers: Bambu Lab PETG Basic pulls 51 MPa in XY and 35 MPa in Z; Prusament PETG's interlayer adhesion is 18 MPa against 47 MPa flat.
Tagged “part-strength”
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GuideHardware
Heat-set inserts for 3D prints: sizes, temperatures and installation
What brass heat-set inserts are, the M2 to M5 size families with hole and wall figures, the iron temperature rule, and the 181 kg M3 pull-out from CNC Kitchen's test.
AnswerHardware
How to print a gear that lasts
A numbered gear recipe (material, teeth, perimeters, infill, orientation) plus the 2022 Polymers wear test where PETG gears outlasted PLA by 22.3 percent and ABS by 37.
AnswerMaterials
Which filament should you use for a replacement part?
A decision table from what the broken part faces (heat, sun, load, chemicals) to a material class, with HDT, impact and absorption figures from manufacturer data sheets.
AnswerHardware
Which print orientation makes a replacement part strongest?
Lay the load along the layers: Bambu Lab PETG Basic pulls 51 MPa in XY and 35 MPa in Z, and CNC Kitchen's PLA coupons gained 27 percent tilted to 45 degrees.
AnswerHardware
How to design snap-fit clips for replacement parts
Cantilever clip rules from Bayer's snap-fit guide: taper the arm to half its root thickness, fillet the root, keep strain under 2.5 to 4 percent, print the arm flat.