Feature: 1. WEAR RESISTANT MATERIAL: Flexible shaft coupling glue block material using imported PA66, with good wear resistance, corrosion resistance and electrical insulation 2. SLIDING WITH SMALL DEVIATION: Shaft coupling sliding design can compensate radial and angular deviation more effectively 3. FLEXIBLE AND REMOVABLE: The flexible coupler has a detachable design for easy installation and is secured by clamping screws 4. APPLICABLE SCENARIO: 3D printer flexible coupler is mainly used for CNC machine tool, servo motor, spindle, stepper motor and so on 5. LOW VIBRATION: Flexible coupler has super torsion, can absorb vibration, suitable for high torsion transmission. Possess high hardness, sturdy, good response, not easy to loose Specification: Item Type: Flexible Shaft Coupling Model: D25L39 Product Dimension: Approx. 25 x 39mm / 0.98 x 1.54in Rated Torsion: 2.2N.M Tolerance of Eccentricity: Approx. 1.6mm / 0.06in Allowable Deflection Angle: Approx. 3mm / 0.12in Maximum Speed: 6000rpm Static Torsion Stiffness: 130N.M/rad Commonly Used D1, D2, Axes Diameter: Approx. 5mm / 0.2in 6mm / 0.24in 6.35mm / 0.25in 8mm / 0.31in 9mm / 0.35in 9.525mm / 0.38in 10mm / 0.39in 11mm / 0.43in 12mm / 0.47in Thread: M3 Shaft Socket Material: High strength aluminum alloy Glue Block Material: PA66 Surface Treatment: Anodizing treatment. Package List: 1 x Flexible Shaft Coupling