Impossible 3D-printed bolt and nut Free 3D print model

cgtrader

The "Impossible bolt and nut" is a fun 3D-printable two-part assembly with working thread, where a nut is securely trapped on a bolt. One STL file contains the nut positioned at a slight distance from the bolt's head. The narrow gap between them is precisely designed to create a fracture plane, making it possible to easily remove the nut from the bolt's head. Several STL files are supplied, scaled to commonly available 3D-print heights, allowing you to choose the one that best suits your desired print height. With minor scaling adjustments, the STL can be successfully printed regardless of size. For more information on how to 3D-print this unique bolt and nut assembly, please see our instructions carefully. Be aware that some slicing software may interpret the air gap as an STL defect, so make sure to disable the STL heal function when printing. The designed gap between the nut and the bolt's head is a deliberate feature of the "Impossible bolt and nut". This gap is carefully sized to encourage the slicing software to "skip" a layer. Although it's relatively small, it should be just large enough for the nut's first layer to bond with the bolt's head, while still allowing them to separate easily. When removing the nut from the bolt, remember to use caution and safety precautions. Insert a thin knife blade carefully between the bolt's head and the nut, wiggling it back and forth until you feel most of the gap break free. Once loose, remove the knife blade and gently unscrew the nut by hand. Choosing the correct STL file is crucial for printing success. We have provided several STL files in this thing to cater to various 3D printer Z-heights. Simply select the STL file that best matches your 3D printer model and make any necessary minor adjustments, avoiding significant changes to the bolt's design, particularly around the critical gap area.