... . size is optional 4. stepper drive motor,square guide rail metal engraver Main parameters: Performance parameterMT-M1318X,Y Working area13mmx180mmZ Working ... cooling spindle, steppter motor.Main factures:1,X,Y,Z three-axis all the imported linear square orbit,two line sliding ... ,heavy loading, stable working, long lifetime.2,X,Y,Z three-axis all have the waterproof, dustproof system, can prolong the ...