This is a JKM JK42HM40-1684 40mm 1.68A 0.9-Degree Two-Phase Hybrid Stepper Motor for CNC Router we highly recommend today. It will rotate when voltage is applied to their terminals. This stepper motor effectively has multiple electromagnets arranged around a central gear-shaped piece of iron. Besides, the torque curve may be extended by using current limiting drivers and increasing the driving voltage Altogether, this is a simple, but very powerful stepper motor. Indispensable helper to improve your work! Don▽t miss it!<!--Features --><p>FEATURES</p><UL><LI>High start speed</LI><LI>Get precise angular movements at reasonable price</LI><LI>Can be used to activate the drive transistors in the right order</LI><LI>The ease of operation makes motor convenient to use</LI><LI>A stepper motor is an electric motor that is able to create sharp movements</LI><LI>Widely used for 3D printers, monitor equipment, textile/packaging machinery, stage lighting, etc.</LI></UL><!--Specifications --><p>Specifications</p><TABLE class=ke-zeroborder border=0 cellSpacing=0 cellPadding=0 width="100%"><TBODY><TR><TD width=131>Brand</TD><TD width=365>JKM</TD></TR><TR><TD width=131>Model</TD><TD width=365>JK42HM40-1684</TD></TR><TR><TD width=131>Motor Length</TD><TD width=365>40mm</TD></TR><TR><TD width=131>Diameter of Axle</TD><TD width=365>5mm</TD></TR><TR><TD width=131>Temperature Rise</TD><TD width=365>80→ Max.</TD></TR><TR><TD width=131>Holding Torque</TD><TD width=365>3.3Kg.cm</TD></TR><TR><TD width=131>Step Angle</TD><TD width=365>0.9▲</TD></TR><TR><TD width=131>Certification</TD><TD width=365>Certification: CE</TD></TR><TR><TD width=131>Ambient Temperature Range</TD><TD width=365>-20 → ~+50→</TD></TR><TR><TD width=131>Shaft Radial Play</TD><TD width=365>0.02Max. (450g-load)</TD></TR><TR><TD width=131>Shaft Axial Play</TD><TD width=365>0.08Max. (450g-load)</TD></TR><TR><TD width=131>Insulation Resistance</TD><TD width=365>100M┯ Min. 500V DC</TD></TR><TR><TD width=131>Dielectric Strength</TD><TD width=365>500V AC for 1minute</TD></TR><TR><TD width=131>Max. Radial Force</TD><TD width=365>28N (20mm from the flange)</TD></TR><TR><TD width=131>Max. Axial Force</TD><TD width=365>10N</TD></TR><TR><TD width=131>Dimensions</TD><TD width=365>(1.65 x 1.65 x 1.57)" / (4.2 x 4.2 x 4)cm (L x W x H)</TD></TR><TR><TD width=131>Weight</TD><TD width=365>9.88oz / 280g</TD></TR></TBODY></TABLE><!--Package Includes --><p>Package Includes</p><UL><LI>1 x Stepper Motor</LI></UL><!--Extra Info --><!--produts_compatibility -->