1. Main motor drive is equipped with the technique of frequency converter changing rotate speed . And changing rotate speed is the range -4000 rpm to +4000 rpm. 2.Measuring oil and length Journey of principal axis rotate speed rotatary angle are all manifested with digit. 3.The fuel temperature and air pressure aer displayed with 3-digit 4.Manual changing rotate speed and rotate speed are ten-archive presetting. 5. 0 to 0.25 MPa air source output , air pump is built-in. 6. 12V/24V power supply 7. Main motor has the structure of cubic steel frame and the whole structure is compact and stable. 8. The motor shell is spraied with static , which is beatiful. 9.Gathering oil tank cold rotate towards the left or towards the right, it can also be adjusted up to down. 10. Having emergency stop button . 11. Having the protection functions of over voltage .low voltage over heat and over load etc. 12.Ultra low noise. 13. Save energy.