Feature 1100% brand new and high quality. 2Moving 0.25mm for one step, can use microstep driver if need smaller. 3The maximum linear speed is 25mm per second. 4Widely used for small devices such as medical equipment, laser engraving machine, etc. 5The motor need a A4988 driver(not included) to drive, can not directly connect to power. Features: 100% brand new and high quality. Moving 0.25mm for one step, can use microstep driver if need smaller. The maximum linear speed is 25mm per second. Widely used for small devices such as medical equipment, laser engraving machine, etc. The motor need a A4988 driver(not included) to drive, can not directly connect to power. Specifications: Model D8-MOTOR80 Drive voltage 12V DC (drive: 16219) Current per phase 800 ma/phase Coil resistance 15 10%/phase No.of phases 2 phases Step angle 18 ./step Excitation method 1-2 phase excitation Drive mode Bipolar drive Pull-out thrust 500g above at 125pps Max response frequency 1600 pps above Max starting frequency 1100 pps above Insulation class Class E Insulation strength 100vac one second Insulation resistance 50M DC 500V Operating temperature 0~+55 Motor surface temperature 80 Thread Rod Diameter 3mm Thread Rod Length 90mm Slide Block Stroke 80mm Thread Rod Pitch 0.5mm Length 10.3cm/4.1in Weight 50g (approx.) Package Includes: 1 x Motor with Linear Slide