2Pcs 4mm to 4mm Aluminum Alloy Shaft Coupling L25xD19 Flexible Coupler Beam for 3D Printer CNC Machine DIY Encoders and Motors Shaft,Silver

Two 4mm-to-4mm aluminum shaft couplers, L25xD19, handy fit
✔️ 4mm to 4mm bore, 25mm length, 19mm OD, aluminum alloy, silver

These compact rigid shaft couplers come as a pack of 2, ideal for dual-shaft setups in 3D printers, CNC machines, encoders, and DIY robotics.

✅ Bore: 4.0 mm to 4.0 mm shaft compatibility
✅ Length: 25 mm (0.98"), OD: 19 mm (0.75"), material: aluminum alloy, color: silver
✅ Spring-type design provides buffering for angular and axial misalignment
✅ Package includes 2 couplers and 1 hex wrench for quick setup

💡 What is a 4mm-to-4mm shaft coupling used for in hobby CNC and 3D printer setups?

These handy couplings let you join compact shafts while smoothing out tiny misalignments.

- Connect motors to encoder or drive shafts in tight spaces - Cushion misalignment with spring buffering to extend bearing life - Lightweight aluminum alloy keeps inertia low in fast-moving axes - Includes a hex wrench for quick installation and adjustments