Looking for a powerful and versatile spindle? Our 3.5KW Air Cooled Spindle is the perfect choice. This 3.5 kw spindle offers an extra reserve of power, making it more capable when processing hardwoods and non-ferrous metals. The core 3.5 kw spindle motor is specially reinforced to ensure stable output even under high loads.
■ Product Description
■ Technical Parameters
| Model | STF47-82-3.5-ER20 |
| Power | 3.5kW |
| Voltage | 220/380V |
| Current | 12.1/7.2A |
| Poles | 2 |
| Torque | 1.17Nm |
| Speed | 18000rpm |
| Frequency | 300Hz |
| Cooling | Air |
| Tool interface | ER20 |
■ 3.5 kW Air Cooled Spindle Motor Advantages
Powerful Torque Output
The 3.5kW power segment offers significantly enhanced torque compared to 2.2kW, supporting deeper cutting depths and greater feed rates, thereby greatly improving machining efficiency and material removal rate.
High Rigidity from Square Structure
The square casing design ensures extremely high stability during spindle mounting. When performing medium-to-heavy cutting, it effectively absorbs vibration, guaranteeing machining precision, stable tool operation, and extended tool life.
High Compatibility of ER20 Collet
ER20 is one of the most commonly used collet specifications in the industry, capable of clamping tools with maximum diameters typically up to 13mm. This allows the spindle to be compatible with a wider variety of tool types and diameters, meeting diverse needs from roughing to finishing.
Air-Cooled Convenience, Low Maintenance Cost
Uses fan cooling, completely eliminating the need for maintenance work required by water circulation systems (such as pumps, hoses, and antifreeze). Installation is simple, and environmental adaptability is strong.
Good Speed Performance and Surface Quality
Typically capable of high speeds ranging from 18,000 to 24,000 RPM, ensuring high surface finish quality when processing materials like acrylic and wood.
■ Application Scenarios
Furniture Panel Batch Nesting
Suitable for high-volume, continuous panel cutting, slotting, and drilling for customized furniture and cabinet doors, capable of efficiently processing 18mm or thicker panels.
Heavy-Duty Wood Routing
Performing deep relief carving, powerful slotting, and complex shape routing on solid wood and high-density board (MDF).
Thick Non-Metallic Material Processing
Fast, deep cutting of thick acrylic, high-density PVC boards, and certain light composite materials.
Precise Milling of Light Metal Materials
Can be used for higher feed rate milling and trimming of soft metal materials like aluminum sheets, aluminum profiles, and copper sheets, leveraging its high rigidity and torque.
■ Adapted Equipment
● Medium-to-Large CNC Nesting Machines
Suitable for panel furniture machining centers with platform sizes of 1325 (1.3m × 2.5m) and larger, which require high efficiency and continuous production.
● Heavy-Duty Wood Engraving Machines
Used for complex, deep wood carving and routing, where extreme demands are placed on spindle rigidity and stability.
● Multi-Head or Gang Drilling Machining Centers
Used as the primary cutting unit, cooperating with other functional components to achieve multi-process integrated machining.
● High-Performance Advertising Engraving/Milling Machines
Equipment dedicated to large-format, high-precision, and high-feed-rate cutting of thick advertising panels.
■ 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.
