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    3.5kW Air Cooled Spindle Motor for CNC Router

    5 out of 5 based on 1 reviews | Write a review
    3.5kW air cooled spindle motor with ER25 collet for CNC router, it features high speed of 18000rpm and low noise, 1.68Nm torque, three phase, operates at 380V/220V 300Hz, long service life and strict quality control.
    Free Shipping Worldwide
    Delivery date: 10-20 days


    • Cooling: Air cooling, Power: 3.5kW, Torque: 1.68Nm, Collet: ER25
    • Voltage: 380V/220V AC at 300Hz, cooled spindle motor speed: 1-18000 R/min
    • Fast response, strong overload capacity, low noise and high mechanical precision.
    • High quality 4pcs bearings (7008Cx2 + 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.
    • Tight sealing and two-layer dustproof design.


    This series air-cooled electric spindle motors are applicable to CNC engraving machines and used for high speed profiling, drilling, cutting, engraving and groove milling of wood, plastics, aluminum, rubber and other materials.

    3.5kW Air Cooled Spindle Motor Specification

    Model STF47-82-3.5
    Power 3.5kW
    Phase 3 Phase
    Speed 18000rpm
    Voltage 380V±10% / 220V±10% AC
    Current 7.2A / 12.1A
    Frequency 300Hz
    Torque 1.68Nm
    Cooling Type Air-cooled
    Lubrication Grease
    Thermal Class Class F
    Protection Class IP50
    Certification CCC, CE, RoHS, UL, VDE
    Warranty Bearings for half a year, other parts for one year
    Joint of Nose ER25 (φ3.175-φ16)
    Bearings Type 7008C P4*2 & 7002C P4*2
    Application Woodworking & Plastic
    Weight 8.5kg

    3.5kW Air Cooled Spindle Motor Dimension (Unit=mm)

    3.5kw spindle motor dimension


    The spindle motor of woodworking engraving machine is an important component of woodworking engraving machine. The advantages and disadvantages of the spindle motor directly affect the processing speed and accuracy of the engraving machine. How to select high-quality spindle motor is very important. ATO summarizes the main points of woodworking engraving machine spindle selection for the reference of users:

    1. If we pursue the efficiency of woodworking engraving machine, we should not only have a high speed, but also a large amount of knives. For example, when processing solid wood, we need a spindle motor with a power of more than 3KW.

    2. Whether the spindle motor of woodworking engraving machine adopts high-precision bearings or not, if it does not use high-precision bearings, the performance is that the spindle motor overheated after long-term high-speed rotation, which affects the service life of the spindle motor.

    3. Whether the spindle of woodworking engraving machine rotates at different speeds, especially at high speeds, the sound is uniform and harmonious.

    4. Whether the radial force of the principal axis of woodworking engraving machine is applied. The main reference is whether the material with hard texture can be cut at high speed. Some spindle motors can only cut hard materials at very low speed, otherwise the performance of the motor will be seriously lost, which will affect the accuracy of the spindle after a period of time, or even cause faults.

    Existing reviews of 3.5kW Air Cooled Spindle Motor for CNC Router
    Nice spindle motor
    Very smooth, nicely machined and professional looking. Running at about 3600 RPM, this air cooled spindle motor is quieter than the pond pump that circulates the coolant. It is very quiet, to the point where you can barely hear it.
    From: Graeme Rand | Date: 05/01/2020
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