3.5kW 220V Air Cooled CNC Router ER20 Spindle Motor
Searching for the perfect power core for your CNC router? Our CNC Router Air Cooled Spindle is exactly what you need. As a leading Air Cooled CNC Router Spindle China supplier, our Factory-direct products offer an unbeatable advantage in both performance and price. This air cooled cnc router spindle is designed for applications like woodworking, advertising, and mold making. Check out our Air Cooled CNC Router Spindle For Sale to elevate your engraving efficiency.
■ Product Description
■ Technical Parameters
| Model | STF53-134B-3.5-ER20 |
| Power | 3.5kW |
| Voltage | 220/380V |
| Current | 12.1/7.2A |
| Poles | 2 |
| Torque | 1.59Nm |
| Speed | 18000rpm |
| Frequency | 300Hz |
| Cooling | Air |
| Tool interface | ER20 |
■ Product Advantages
High Torque and High Efficiency
The 3.5kW power provides ample cutting force, a significant upgrade from 2.2kW, capable of supporting higher feed rates and deeper cutting depths. This dramatically increases the efficiency and material removal rate for medium-duty cutting tasks.
Ultimate Rigidity from Flying Edge Structure
The short nose or flying edge design pulls the tool clamping point closer to the spindle bearings, which greatly enhances the bending rigidity at the spindle nose. This effectively suppresses vibration during medium-to-heavy cutting, ensuring high precision and tool life.
Optimized for Automatic Tool Changer (ATC)
This spindle structure is inherently suited for integration into ATC systems (typically paired with BT30/ISO30 holders), making it an ideal core power unit for automated production lines. It shortens tool change time and improves automation level.
Air-Cooled Convenience and High Reliability
Uses an integrated fan for cooling, eliminating the need for any external water circulation system. Installation is simple and maintenance-free, offering extremely high reliability in industrial environments (especially those with dust or where water line maintenance is inconvenient).
Good Speed and Precision
It possesses high-speed capability (typically 18,000-24,000 RPM), allowing it to meet surface finish requirements for machining while delivering robust torque.
■ Application Scenarios
Automated Panel Furniture Processing
Applicable to CNC nesting machines and machining centers equipped with ATC systems, performing high-efficiency, multi-process operations like panel cutting, slotting, and drilling.
Medium-Depth Wood Routing
Performing medium-depth, complex shape routing and engraving on solid wood and high-density board (MDF).
High-Precision Component Processing
High-precision, multi-process milling and drilling of materials such as resin, engineering plastics, and artificial wood.
Precision Processing of Light Metal Materials
Can be used for fine milling and drilling of soft metals like aluminum alloys and copper sheets; its high rigidity helps ensure accuracy in metal processing.
■ Adapted Equipment
● Medium Automatic Tool Change (ATC) CNC Machining Centers
CNC machines in the woodworking or advertising industry equipped with tool magazines, requiring high-efficiency, multi-process automated production.
● CNC Nesting/Gang Drilling Centers
Used as the primary cutting/drilling unit for continuous production in the panel furniture industry.
● High-Performance General CNC Milling Machines
Equipment used in laboratories or for precision part prototyping, requiring the spindle to have high rigidity, high precision, and an auto tool change function.
■ FAQ
Q: How to choose the right power?A: It depends on the material you're processing.
2.2kW: Suitable for engraving materials like acrylic and PVC.
3kW - 4.5kW: Most common, used for nesting and engraving various wood panels.
6kW and above: Ideal for heavy cutting, like cutting solid wood.
Q: What should be noted when using an air-cooled spindle?A: Keep it clean, don't overload it, and check if the fan is spinning correctly.
Q: How to match an air-cooled spindle with an inverter?A: The inverter's power, voltage, and frequency must match the spindle's specifications.
Q: Is it normal for an air-cooled spindle to get hot during use?A: Slight warmth is normal. However, if it feels very hot to the touch, the fan may be broken or the spindle could be overloaded.
Q: What is the typical lifespan of an air-cooled spindle?A: The lifespan of an air-cooled spindle mainly depends on its bearings. With proper maintenance and without overloading, a good spindle can last for thousands or even tens of thousands of hours.
