3.2 kW Water Cooled CNC Spindle Motor, 24000 rpm, ER20

3.2 kW water-cooled CNC spindle motor at low cost, 24000 rpm speed, 1.27 Nm torque, 400Hz frequency, 3 phase 220V/380V AC operating voltage, ER20 (φ3.175 mm - φ13 mm) collet.

Feature

• Spindle motor with superior durability ER20 collet ensures smooth running.
• Fast response, strong overload capacity, low noise, and high mechanical precision.
• High-quality 3 pcs bearings (7005Cx2 + 7003Cx1), runout off less than 0.01mm, tapered bore less than 0.005mm.
• P4 grade ceramic ball bearings are used as spindle bearings, 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.

Application

This series of air-cooled electric spindle motors is designed primarily for use with variable frequency drives or engraving machines, as well as CNC routers. It is ideal for high-speed profiling, drilling, cutting, engraving, and groove milling across a variety of materials, including wood, metal, plastics, foam, and rubber.

Note: Ensure that the spindle motor and VFD are compatible. The VFD’s specifications and parameter settings must align with the spindle motor’s nominal parameters. Incorrect settings can lead to spindle motor damage or burnout.

Specification

Model		STZ100-3.2-ER20
Power		3.2 kW
Diameter		φ100 mm
Phase		Three phase
Speed		24000 rpm
Voltage		3-phase 380V±10% AC		3-phase 220V±10% AC
Current		8A		12.8A
Matched VFD Model		GK3000-4T0055G (7.5 hp three phase VFD)		GK3000-4T0055G (7.5 hp three phase VFD)
Frequency		400Hz
Torque		1.27 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		ER20 (φ3.175 mm - φ13 mm)
Bearings Type		7005C P4*2 & 7003C P4*1
Application		Woodworking & Plastic
Weight		8.5 kg
Download Attachments		3.2 kW Water Cooled Spindle Motor CAD Drawings

Details

Tips: Water Cooling vs. Air Cooling of Spindle Motor

When the high-speed motor spindle is working, the built-in motor and rolling bearing will generate a lot of heat during the rotation. Because the spindle has the characteristics of a compact structure, small gap, and weak spontaneous heat dissipation effect, if the heat is not dissipated in time, it will cause different degrees of thermal expansion between internal parts, which will affect the performance parameters of the motor spindle rigidity and machining accuracy. It will seriously affect the service life of the spindle. For the overall cooling of the motor spindle, there are usually two ways water cooling and air cooling.

Water cooling refers to the design of cooling water circulation inside the high-speed spindle motor, and the corresponding cooling machine is equipped outside so that the cooling liquid circulates inside the spindle to take away the internal heat. The advantages of this cooling method are simple and reliable in design, and the cooling effect is more obvious.

Air cooling refers to the design of a forced convection channel between the housing of the high-speed spindle motor and the stator of the motor. The heat of the motor enters the forced convection area through heat conduction and finally brings the heat into the air to realize the main shaft of the motor. Constant temperature work. Air cooling is non-polluting. If a static pressure gas bearing is used, the gas of the static pressure gas bearing can be used to circulate inside the spindle to take away part of the heat of the motor.