SnapRail Key

🔑 Highlights3 printed parts + 1 compression spring, simple but clever designTwo-stage action (slide + press) for smooth key controlPrints without supports, compatible with most 3D printersKey Holder can be updated later to fit other key types⚙️ Design & MechanismCase Body: internal rails for smooth guidanceSlider: moves along rails, drives the Key HolderKey Holder: secures the key, extends and retracts with the sliderOperation:Slide forward → key extendsReturn slider, press downward → catch releases → spring retracts key📐 Mechanical SpecsExtension spring: 6.4 mm diameter, 22.2 mm length or use Bambu Lab Extension Spring BA006Spring seat: 5 mm, fits perfectlyKey Holder: designed for LKW5-style key, future updates for other types🖨️ Printing & AssemblyPrint settings: 0.16 mm layer height, 15% infill, PLA or PETG recommendedAssembly: after printing → insert spring into case → slide in key holder and slider → ready to use Boost MeA rookie designer’s first try — a sliding keycase with spr