ER-20 Collet / Spindle Wrench - Huanyang CNC

thingiverse

This is a Custom ER-20 Collet Wrench designed specifically for Huanyang Spindles. The wrench is closed to provide maximum strength except for the bit hole, which remains open for easy access. A convenient hole allows for lanyard attachment or pegboard hanging. To ensure a snug fit with the nut, the wrench socket features rounded radii in the corners. For smaller printers, this design enables diagonal printing, requiring at least 60% fill to achieve sufficient strength. Support material helps preserve lower filleting, while minor filing of inner surfaces may be necessary due to tight tolerances that prevent breaking. The wrench includes clear tighten and loosen markings for safely loosening the collet in its typical inverted-nut orientation. For enhanced visibility, a Magic Marker can create direction arrows on the markings. Please verify this information, as it was not present on the prototype shown in the image. For those interested in supporting my continued creation of innovative projects, I invite you to visit my Patreon Page at https://www.patreon.com/brendaem. When printed correctly, this wrench is surprisingly robust and has withstood numerous uses. However, if you experience an unusually tight collet, please exercise caution and pass on this tool. ER Collets can unexpectedly snap when unscrewed, posing a risk to fingers and surrounding machinery. Always deenergize your machine before loosening the collet nut and ensure the bit is securely tightened to prevent tool or nut loosening. Wear protective gear, including ear protection and safety glasses, as the bit will be sharp and striking the wrench may cause breakage or spindle damage.