DIY builders and makers, this uxcell rigid shaft coupler is exactly what you need for connecting motors to lead screws or other shafts! The aluminum alloy construction makes it lightweight yet durable, with a silver finish that looks professional. It handles 3mm to 3.17mm bore sizes perfectly, which is ideal for connecting slightly mismatched shafts or adapting between different components. At 26mm long with a 10mm outer diameter, it's compact enough for tight spaces but substantial enough to handle decent torque. The set screw design with four M3 screws provides solid clamping force to keep everything securely connected without slipping. Perfect for 3D printers, CNC routers, small robots, automation projects, or any application where you need to connect a stepper or servo motor to a drive mechanism. The rigid design means it doesn't allow for misalignment - you'll need to make sure your shafts are properly aligned during installation, but once set up, it provides excellent torque transmission with minimal backlash. Comes with a hex wrench and all necessary screws, so you've got everything needed for installation. The quality feels solid - clean machining, smooth edges, and reliable performance that won't let you down mid-print or during crucial operations.
Free 30-day returns 
Free 30-day returns
