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    2.2 kW Air Cooled CNC Spindle Motor, 24000 rpm, ER20

    5 out of 5 based on 2 reviews | Write a review
    Low price 2.2 kW air cooled spindle is a CNC router spindle motor, with high speed 24000 rpm, 0.85 Nm torque, 400Hz frequency, ER20 collet, works at 3 phase 220V AC voltage.
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    Delivery date: 6-12 days

    2.2 kW CNC spindle motor for sale at competitive price, 24000 rpm speed, 0.85 Nm torque, 400Hz frequency, 3 phase 380V AC operating voltage, ER20 (φ3.175 mm - φ13 mm) collet.


    • Spindle motor with air cooling fan and ER20 collet ensures smooth running.
    • Fast response, strong overload capacity, low noise and high mechanical precision.
    • High quality 4 pcs bearings (7005Cx2 + 7002Cx2), runout off less than 0.01mm, tapered bore less than 0.005mm.
    • P4 grade ceramic ball bearings used as spindle bearing, which improves the service life under high speed revolution.
    • Lubricated with grease, which is resistant to 200 degrees high temperature.
    • Tight sealing and two-layer dustproof design.


    This series air-cooled electric spindle motors mainly match with variable frequency drives or engraving machines, CNC router machine, and used for high speed profiling, drilling, cutting, engraving and groove milling of wood, metal, plastics, foam, rubber and other materials.

    Note: The spindle motor and VFD shall be suitable with each other. The specifications and parameter settings of the VFD shall match the nominal parameters of the spindle motor. Otherwise, it will burn the spindle motor if the settings are not correct.


    Model STF80-2.2-ER20
    Matched VFD Model GK3000-2S0037 (5 hp single to three phase VFD)
    GK3000-4T0037G (5 hp three phase VFD)
    Power 2.2 kW
    Phase 3 phase
    Speed 24000 rpm
    Voltage 3-phase 220V±10% AC
    Current 8.0A
    Frequency 400Hz
    Torque 0.85 Nm
    Number of Pole 2 poles
    Cooling Type Air-cooled
    Installation Method Horizontally or Vertically (When the motor is installed, the radial runout standard is required to be within 5um, and the chuck is generally 10um-15um.)
    Lubrication Grease
    Thermal Class Class F
    Protection Class IP50
    Certification CE
    Warranty Bearings for half a year, other parts for one year
    Joint of Nose ER20 (φ3.175 mm - φ13 mm)
    Bearings Type 7005C P4*2 & 7002C P4*2
    Application Woodworking & Plastic
    Weight 4.8 kg
    PDFDownload Attachments 2.2kW Air Cooled Spindle Motor CAD Drawings



    2200W Air Cooled CNC Spindle Motor Details

    Tips: Servo Motor vs. Spindle Motor in CNC Machine

    The main requirements of CNC machine tools for servo motors are:

    1. Mechanical characteristics: The speed drop and rigidity of the servo motor are required to be small.
    2. Requirements for rapid response: This is more stringent in contour processing, especially for high-speed processing of objects with large curvatures.
    3. Speed ​​adjustment range: This can make CNC machine tools suitable for various cutting tools and processing materials, suitable for various processing techniques.
    4. There is a certain output torque and a certain overload torque is required. The nature of the mechanical load of the machine tool feed is mainly to overcome the friction of the table and the resistance of cutting, so it is mainly the nature of "constant torque".

    The main requirements for high-speed electric spindles motor are:

    1. Sufficient output power. The spindle load nature of CNC machine tools is similar to "constant power". That is, when the spindle motor speed of the machine tool is high, the output torque is small; when the spindle speed is low, the output torque is large. That is, the requirement of the spindle drive device must have the nature of "constant power".
    2. Speed ​​adjustment range: In order to ensure that the CNC machine tool is suitable for various cutting tools and processing materials; it is suitable for various processing techniques, and the spindle motor is required to have a certain speed adjustment range. But the requirement for the spindle is lower than the feed.
    3. Speed ​​accuracy: Generally, the static difference is required to be less than 5%, and the higher requirement is less than 1%.
    4. Fast: The spindle drive device is sometimes used for positioning function, which requires it to also have a certain speed.

    Safety Tips for Using ATO CNC Spindle Motors

    1. The electric spindle motor and VFD shall be suitable with each other. The specifications and parameter settings of the VFD shall match the nominal parameters of the spindle motor, and it will burn the spindle motor if the settings are not correct.

    2. Before using water-cooled spindle motor, it shall ensure that cooling cycle system works normally and the running under no cooling conditions is prohibited. The volume of cooling water is calculated as per 1 liter/minute, the minimum flow of cooling water is not less than 5 liter/minute, cooling water pipe and the nozzle shall be connected reliably and there is no leakage.

    3. The cooling liquid shall be clean and free of grease and the temperature shall be within 5-30℃. The cooling medium shall carry out force cooling when the ambient temperature is higher than 30℃. The precision lathe requires the cooling liquid with a constant temperature of 20 +/-2℃.

    4. During storage and transport of the spindle motor, the status of high-speed grease inside the bearing will change. The user shall run it at a low speed first by starting from the lowest speed of the spindle motor for 30 minutes and then 20 minutes for every 3000 rounds. Otherwise there will have abnormal sound, noise, heat and other phenomena, which will affect the bearing life if the spindle motor is started directly at a high speed. During long term storage, the spindle motor shall run (at low speed) for 15-30 minutes once a week at last.

    5. Collet, nut and inner taper hole shall be washed clean when installing blades on the spindle motor in order to avoid any impact on the precision. The blade handle shall be inserted into the collet more than 15mm.

    6. For daily machining, the spindle motor shall be warmed up, run for 15-20 minutes when the machining speed is reached and then performs precise machining. It is better to stop the spindle motor for two hours every day in order to recover its mechanical fatigue and prolong its life time.

    7. No knocking the end cover of the spindle motor. No hammering the collet and blade head when removing blades. No shocking or colliding during transport, storage and using, especially the end of the spindle motor.

    8. The spindle motor shall run in designated direction.

    9. The spindle motor shall be installed and fixed according to the relevant drawings and instructions.

    10. The temperature shall be within 22-25℃ if water cooling machine is used.

    11. The spindle motor adopts vapor lock and the gas source shall not be used until it has passed oil-water separator and dry filter. The air pressure is 0.2-0.25Mpa and the filtering precision is 5μm, otherwise there will cause damages to the bearing.

    Products specifications
    Spindle Motor Power 1.2 kW - 3 kW
    Spindle Motor Speed 24000 rpm
    Spindle Motor Collet ER20
    Existing reviews of 2.2 kW Air Cooled CNC Spindle Motor, 24000 rpm, ER20
    Air cooled CNC spindle motor for now seem to work very good.
    Using this 2.2 kW air cooled CNC spindle motor my CNC, upgraded from a router. Outstanding product and customer service. Shipped very fast. Recieved sooner than when first ordered.
    From: Stults | Date: 28/06/2022
    Was this review helpful? Yes No (0/0)
    Good spindle
    Use for my aluminum milling CNC, minimal runn out, ballanced nut. Great price. Well made. Shipped very fast. Recieved sooner than when first ordered.
    From: Bily | Date: 15/04/2022
    Was this review helpful? Yes No (0/0)
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