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    1.5 kW Water Cooled CNC Spindle Motor, 24000 rpm, ER11

    5 out of 5 based on 2 reviews | Write a review
    Water cooled 1.5 kW round spindle motor, comes with 24000 rpm high speed, ER11 collet, 0.56 Nm torque, works at 3 phase 220V 400Hz. Cheap spindle motor is designed for wood carving/engraving machine, CNC router machine.
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    Delivery date: 6-12 days

    1.5 kW water cooled CNC spindle motor for sale at good price, 24000 rpm speed, 0.56 Nm torque, 400Hz frequency, 3 phase 220V AC operating voltage, ER11 (φ3.175 mm - φ7 mm) collet.


    • Spindle motor with superior durability ER11 collet ensures smooth running.
    • Fast response, strong overload capacity, low noise and high mechanical precision.
    • High quality 3 pcs bearings (7005Cx2 + 7002Cx1), 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 water 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 STZ80-1.5-ER11
    Matched VFD Model GK3000-2S0022 (3 hp single to three phase VFD)
    GK3000-4T0022G (3 hp three phase VFD)
    Power 1.5 kW
    Diameter φ80 mm
    Phase Three phase
    Speed 24000 rpm
    Voltage 3-phase 220V±10% AC
    Current 6A
    Frequency 400Hz
    Torque 0.56 Nm
    Number of Pole 2 poles
    Cooling Type Water-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 ER11 (φ3.175 mm - φ7 mm)
    Bearings Type 7005C P4*2 & 7002C P4*1
    Application Woodworking & Plastic
    Weight 4 kg
    PDFDownload Attachments 1.5kW Water Cooled Spindle Motor CAD Drawings



    1500W Water Cooled CNC Spindle Motor Details

    Tips: Cooling Method of CNC Spindle Motor

    Engraving machine spindle motor mainly has two ways of heat dissipation: water cooling and air cooling. When the spindle motor is working, high speed rotation will produce a lot of heat. If the heat is not dispersed in time, it will have a great impact on the service life of the spindle, and the spindle will be burned seriously. Normal heating is a normal phenomenon, if too much heat will affect the performance and life of the spindle motor.

    In the process of operation, the engraving machine spindle will produce heat phenomenon, the main reason is bearing damage, lack of bearing grease or bearing is too tight. If it is caused by the bearing of the spindle fever, it is necessary to replace or clean the spindle bearing, or add appropriate amount of grease. When cleaning bearings, kerosene or gasoline is generally used for cleaning, first rough washing and then fine washing, and then evenly coated with high temperature resistant grease and then reassembled. If the bearing preload is too large to cause fever, first check the bearing before and after, adjust the gap between the gaskets. The bearing clearance is required to be between 0.08mm and 0.10mm without the external force of the locking nut, and then the nut can be re-locked.

    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.

    Existing reviews of 1.5 kW Water Cooled CNC Spindle Motor, 24000 rpm, ER11
    Excellent 1.5kw spindle motor
    The water cooled CNC spindle motor arrived on time, with very good protective packaging, and the simple instruction sheet was helpful. My spindle works well, is very quiet. I use it on a hobbyist CNC machine that I have. I’m very happy with it.
    From: Stults | Date: 28/06/2022
    Was this review helpful? Yes No (0/0)
    High quality CNC spindle motor
    Do you provide a round shape CNC spindle motor with air cooled?
    From: Ollie | Date: 16/08/2021
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Yes, we provide, but this motor is not suitable for processing hard materials, such as iron.
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