3D Printing Fastening Knowledge Hub
This engineering reference explains how to judge tightening torque for heat set inserts in 3D printed parts, including insert spin risk, boss cracking, material behavior, and test coupon validation.
Heat set inserts fail when the hole is too large because the insert cannot create enough mechanical engagement with the surrounding printed plastic, reducing torque resistance and pull-out strength.
Heat set inserts fail near edges or corners when there is not enough surrounding printed plastic to resist installation stress, screw preload, torque load, or pull-out force.
Heat set inserts fail in thin wall 3D printed parts when there is not enough surrounding plastic to support installation pressure, screw preload, torque, pull-out load, or repeated assembly.