The air-cooled spindle uses the movement of the motor and the flow of air to produce a hot and cold effect to achieve high-temperature cooling of the spindle. High-pressure air cooling is formed by blowing cold air into the spindle. An excellent air-cooled electro spindle has a good cooling effect and the advantages of energy saving and environmental protection. It is suitable for various processing industries.

The CNC spindle is the core role of a CNC machine. It’s used for high-speed cutting, milling, engraving, and drilling. The inverter controls the spindles; High-speed spindle rotation can generate significant heat. If not cooled in time, it will reduce the service life of the spindle, and in severe cases, the spindle can be burned out. Water-cooled spindles are a type of spindle. It can effectively use water or other coolant liquid to remove the heat generated by the spindle.

The front outlet of the air-cooled spindle housing is provided with a front bearing through a front bearing seat, and a front nut fixed on the rotating shaft is also provided. The rear outlet of the air-cooled spindle housing is supplied with a rear cover.

The rotating body includes a rotating shaft and a front nut. The rear cover is provided with a rear cover air intake channel. The rear cover air intake channel is connected to the housing air intake channel located in the air-cooled spindle housing. The housing air intake channel is connected to the front bearing seat air intake channel and then to the entrance of the front bearing seat annular groove, and the outlet of the front bearing seat annular groove is connected to the housing channel surrounding the air-cooled spindle housing through the front bearing seat exhaust channel.

The last air outlet of the housing channel is connected to the front bearing seat channel to the gap between the rotating body and the front bearing seat.

The air-cooled spindle uses the movement of the motor and the flow of air to produce a hot and cold effect to achieve high-temperature cooling of the spindle. High-pressure air cooling is formed by blowing cold air into the spindle. An excellent air-cooled electro spindle has a good cooling effect and the advantages of energy saving and environmental protection. It is suitable for various processing industries.

Depending on the power requirements, the air-cooled spindle can be used for engraving, milling, cutting, and drilling most metal materials, including copper, aluminum, steel, iron, brass, non-metallic milling, wood, foam, and plastic. It is widely used in watch parts, zinc, the automotive industry, metal parts, metal crafts, jade, metal art, jewelry, and other molding industries. It is designed for batch milling of molds, watches, glasses, panels, brands, badges, smooth, 3D graphics, and text on the outer surface. This milling machine can easily engrave 2D or 3D relief on various materials.

• The internal motor directly drives the air-cooled spindle, which can start and stop quickly at very high speeds, accelerations, and fixed angles. It has good dynamic accuracy and stability and can meet the needs of high-speed cutting and precision machining of CNC machine tools. Since the traditional mechanical transmission device is eliminated, there is no external force in the intermediate transmission link, and the dynamic load on the electric spindle bearing is small, which extends its precision life. The air-cooled spindle provided by our company adopts AC frequency conversion and vector control technology, which can achieve step-less speed change within the rated speed range to meet the needs of various working conditions and load changes when the machine tool is working.
• The air-cooled spindle has a relatively complete “spindle unit” independent of the machine tool transmission system and the overall structure, which promotes the modularization of the machine tool structure. Electric spindle manufacturers have formed standardized and serialized products for machine tool manufacturers to choose according to the use, structure, performance parameters, and other characteristics of the machine tool, changing the “large and complete” production model of traditional machine tool manufacturers and shortening the research and development and production cycle of machine tools. In addition, standardized and serialized electric spindle products make it easy to form specialized and large-scale production capabilities and reduce manufacturing costs.
•  For advanced CNC machine tools such as parallel kinematics, pentahedron machining centers, and small micro-hole machining machines, due to their unique machining processes and machining objects, there are special requirements for spindle speed, precision, and machine tool structure. Our air-cooling spindle adopts an integrated structure design, which performs well at high speed and high precision, effectively meeting the unique requirements of some high-end CNC machine tools.

The air-cooled spindle uses the movement of the motor and the flow of air to produce a hot and cold effect to achieve high-temperature cooling of the spindle. High-pressure air cooling is formed by blowing cold air into the spindle. An excellent air-cooled electro spindle has a good cooling effect and the advantages of energy saving and environmental protection. It is suitable for various processing industries.

Selection steps

• Determine the application field and processing object;
• Determine the maximum power, speed, torque, and other performance parameters required for processing;
• Determine the accuracy requirements according to the processing quality requirements, such as radial runout, axial runout, etc.;
• Select the type that suits the processing requirements, such as single air-cooled spindle, dual electro spindle, multi-head electro spindle, etc.;
• Comprehensively consider the external dimensions of the electro spindle based on power supply voltage, speed, installation method, etc.

How to measure the performance of the air-cooled spindle

• Power: mainly refers to the power consumed when the machine rotates. The greater the power, the higher the processing efficiency;
• Speed: The speed determines the accuracy and quality of the processing. The appropriate speed should be selected according to the characteristics of the processing object;
• Torque: The greater the torque, the higher the load-bearing capacity of the electro spindle. When processing parts, the torque must meet the processing needs;
• Accuracy: Accuracy refers to the runout of the rotating axis of the air-cooled spindle. It is generally divided into radial runout and axial runout. The higher the accuracy, the higher the accuracy of the processed parts.

Precautions

• Before purchasing, you must understand the processing object and its characteristics and determine the required performance parameters;
• Try to avoid electro spindles that exceed your own needs, which can save costs and prevent waste of resources;
• During use, pay attention to maintenance and usage methods to ensure the normal life of the electro

pay attention to applications

• When choosing an air-cooled spindle, you must consider your application. Different applications have different interfaces. In addition, you must clarify your power requirements and the corresponding speed under this power. This is critical because the dimensions of the electro spindle are very different at 1000 rpm and 10,000 rpm for the same 1kW, so the working conditions must be accurate. Another reminder is that the interface of the tool must be clear. This is also a principle. Generally, the interface speed of BT50 can only be used in electro spindles below 8000RPM, and the interface of BT40 can be used in electro spindles under 18000RPM. If a higher speed is required, the tool interface must choose the corresponding high-speed tool interface, such as HSK. The ER or SD spring chuck used on the CNC milling electro spindle also has a specific maximum allowable speed.

• The price of our air-cooled spindles from $200 to $1,500. The cost will vary depending on the specific model, power, bearings, etc.

• The air-cooled spindle has a high-speed motor installed inside, powered by an inverter. It is forbidden to connect it directly to the grid voltage; otherwise, it will cause damage to the high-speed motor and the air-cooled spindle.
• When using an inverter drive, the built-in parameters of the inverter must be set correctly (the parameters of the inverter when it leaves the factory are usually not suitable for high-speed motors, so the inverter must be reset), ensuring that the reference frequency (rotation frequency) and maximum frequency and output voltage are consistent with the parameters required by the high-speed motor, so that the frequency converter parameters match the high-speed motor parameters, and usually they can operate normally.

• When ordering, please tell us the type of air-cooled spindle or the requirements of power, voltage, reference frequency, and installation type to our team members. We will give you a satisfying answer

• The CNC spindle motor must use a suitable inverter or drive controller. The selection and parameters of the inverter or drive controller should match the voltage, current, power, and frequency of the spindle motor. The spindle motor’s speed control and torque output can be achieved in this way.
• Turn the CNC spindle motor shaft head by hand before installation. It should feel flexible, rotate evenly and without blocking.
• The CNC spindle motor must be operated in the indicated direction. Reversal is strictly prohibited. Otherwise, the tool or rotating parts may loosen or fall off, causing production safety accidents.
• The CNC spindle motor must be grounded to prevent electric shock accidents. If it is not grounded, leakage voltage and current will interfere with the regular operation of other circuits.
• When the CNC spindle motor is clamped with a tool, the collet, nut, inner cone, and tool handle must be cleaned to avoid affecting the accuracy.
• The service life of the CNC spindle motor is closely related to the usual maintenance. It cannot be over-speed or overloaded. Otherwise, the bearings are easily damaged. After completing each work, the fan and air duct dust must be blown clean. To avoid affecting the heat dissipation performance of the motor.
• After the CNC spindle motor arrives or has not been turned on for over a month, it must be run at a low speed before installation. The running-in speed is about 10%-20% of the maximum speed, and the time is not less than 30 minutes.
• The CNC spindle motor is a precision product. It is strictly forbidden to collide during storage and use, especially at the shaft end; otherwise, it will affect the accuracy.
• After continuous operation (usually four hours), stopping the machine for half an hour is recommended to cool the spindle.

1.  Clean the CNC router spindle frequently and keep the guide surface, sliding surface, rotating surface, and positioning reference surface clean.
2. Pay close attention to the operation and lubrication of the equipment. The machine should be stopped and checked immediately if any abnormal phenomena such as malfunction, vibration, heating, creeping, abnormal sound, odor, and bruises are found. Only after the fault is eliminated can the operation be continued.
3. Before the automatic operation, please confirm the tool’s setting and the workpiece’s origin.
4. The bits used for processing must be clamped.
5. The cutting process should be used within each axis and spindle’s torque and power range.
6. When loading, unloading, and measuring workpieces, please move the tool to a safe position and stop the spindle; make sure the workpiece is processed in a clamped state.
7. When using fast feed, pay attention to the condition of the operating table to avoid accidents

• When wiring, you must correctly wire according to the product manual of the electric spindle and observe the wiring frame data label and other operating instructions to ensure that the wiring is correct.
• The power should be turned off before wiring to ensure that the power is turned off to avoid accidents or damage to the equipment.
• During the wiring process, safety isolation switches or grounding devices should be used to avoid electric shock or other safety hazards.
• When using a frequency converter, pay attention to the rated voltage and current of the inverter to avoid damage.
• When making electrical connections for newly installed electric spindles, pay attention to the relative potential between dynamic and static power supplies to avoid electromagnetic interference and affect the normal use of the equipment.

If the air-cooled spindle has a flange, it can be installed directly through the flange. If the air-cool spindle has no flange, the end face of the spindle should have a threaded hole that can be connected to the spindle box through the flange.

When using an air-cooled spindle, dust, material chips, and other substances in the air will be deposited in the fan, resulting in poor heat dissipation and unstable operation. Therefore, it is essential to clean the air-cooled spindle fan regularly. It is recommended that users check the fan before starting and after shutting down the machine, and the cleaning cycle should be no less than 2 weeks. At the same time, the recommended cleaning time varies depending on the power used and the material being processed.