
Finishing 3D Printed Paint-Rack Hook Slots Without Cracks
For finish 3D printed paint rack hook slots, first identify a brim remnant or fused strand at a hook-slot entrance and protect slot neck width, hook shoulder, layer direction and the rack's supported load path. Start with a safe-edge needle file worked from the entry toward the opening; use a small rotary detail accessory limited to a marked entrance burr only when access requires it. Control slot gauge, local heat, layer orientation, backing contact and inspection after each pass. Stop when a shoulder becomes shiny, the slot widens asymmetrically or a stress line appears. Release the part only when the approved hook enters and carries the stated noncritical workshop load without slot distortion.
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