Features SMALL VIBRATION: Flexible coupler has super torsion, can absorb vibration, suitable for high torsion transmission. Possess high hardness, durable, good response, not easy to loose WEAR RESISTANT PA66: Flexible shaft coupling glue block material using imported PA66, with good wear resistance, corrosion resistance and electrical insulation FLEXIBLE AND REMOVABLE: The flexible coupler has a detachable design for easy installation and is secured by clamping screws SMALL DEVIATION: Shaft coupling sliding design can compensate radial and angular deviation more effectively APPLICABLE SCENES: 3D printer flexible coupler is mainly used for CNC machine tool, servo motor, spindle, stepper motor and so on Specification: Item Type: Flexible Shaft Coupling Model: D20L33 Product Dimension: Approx. 20 x 33mm / 0.79 x 1.3in Rated Torsion: 1.2N.M Tolerance of Eccentricity: Approx. 1.2mm / 0.05in Allowable Deflection Angle: Approx. 3mm / 0.12in Maximum Speed: 7000rpm Static Torsion Stiffness: 58N.M/rad Commonly Used D1, D2, Axes Diameter: Approx. 5mm / 0.2in 6mm / 0.24in 6.35mm / 0.25in 7mm / 0.28in 8mm / 0.31in Thread: M2.5 Shaft Socket Material: High strength aluminum alloy Glue Block Material: PA66 Surface Treatment: Anodizing treatment Package List: 1 x Flexible Shaft Coupling Package List 1 x Flexible Shaft Coupling