ER20 3KW Square 220V/380V Air Cooled Spindle Motor Kit With VFD Kit for CNC Router Engraving Machine

ZHONG HUA JIANG ER20 3KW AIR COOLED CNC SPINDLE MOTOR WITH VFD KIT

Zhong Hua Jiang ER20 3KW Air Cooled CNC Spindle Motor with VFD Kit is a high-performance square air cooled spindle motor kit designed for CNC routers, engraving machines, woodworking machines, acrylic cutting, PVC machining, MDF processing, PCB work, and soft metal engraving. It combines a 3KW air cooled spindle motor, 3.7KW VFD inverter, ER20 collets, drill bits, aviation wire, power wire, and wrenches for easier installation and reliable CNC machining.

VIDEO OF CNC SPINDLE MOTOR

CATALOGUE OF ZHONG HUA JIANG (PDF Download)

   CNC Router Machine Catalogue 2025.pdf

AIR COOLED SPINDLE MOTOR KIT FOR SALE

Are you searching for an efficient and reliable solution to power CNC woodworking, engraving, acrylic cutting, or DIY CNC projects? Zhong Hua Jiang ER20 3KW Air Cooled CNC Spindle Motor with VFD Kit is built for users who need stable speed control, strong cutting power, and easy integration with a CNC router system.

This compact and robust square air cooled spindle motor is designed for hobbyists, students, small workshops, makers, and professional CNC users. It supports precise engraving, clean cutting, and stable milling on wood, acrylic, PVC, MDF, plastics, PCB boards, and soft metals such as aluminum and brass.

The air cooling system provides efficient heat dissipation without a water pump, water tank, or cooling pipe. For users who want lower maintenance and a faster spindle upgrade, this 3KW air cooled spindle motor kit is a practical CNC router solution.

TECHNICAL SPECIFICATIONS

APPLICATIONS & USE CASES

Wood

Acrylic

Soft Metals

FEATURES OF CNC AIR COOLED SPINDLE MOTOR

Zhong Hua Jiang ER20 3KW Air Cooled Spindle Motor Kit features intelligent VFD control, stable speed adjustment, and user-friendly operation for CNC users of different skill levels.

The kit includes the ER20 3KW air cooled spindle motor, matched VFD, 220V/380V compatible electrical configuration, aviation wire, power wire, wrenches, and drill bits for immediate setup. It delivers 3KW power with 10000-24000 RPM speed control, runout under 0.005mm, four upgraded steel bearings, and dynamic balance technology for lower noise and vibration.

The air cooled structure provides efficient heat dissipation without water cooling accessories, making it suitable for compact CNC routers and common applications on wood, acrylic, PVC, MDF, plastics, and soft metals.

User-Friendly Control

The intelligent VFD control system supports easy speed adjustment and practical operation, helping users match spindle speed to different materials and cutting tasks.

High-Precision Collet System

The ER20 collet system provides secure tool holding, reduced runout, and more consistent machining accuracy for engraving, cutting, drilling, and milling.

Advanced Controller Compatibility

The spindle motor kit can be integrated with common CNC control systems and VFD control methods, allowing speed adjustment from 10000 to 24000 RPM for different CNC router applications.

Reliable Electrical Components

Stable electrical components, 220V/380V support, and aviation wiring help improve installation reliability and long-term performance.

Accurate Speed Regulation

Precise speed control from 10000 to 24000 RPM enables smoother operation for different cutting depths, tool sizes, and material types.

Optimized Air-Cooling Design

The square air cooled spindle body, approximately 118 x 98mm with 325mm length and 7.8kg weight, helps dissipate heat efficiently and supports extended CNC operation.

ADVANTAGES OF AIR COOLED SPINDLE MOTOR

Advanced Dynamic Balance Design

Innovative dynamic balancing technology helps reduce noise, improve spindle stability, and support smoother high-speed CNC machining.

Extended Working Life

The spindle uses four upgraded steel bearings, an all-copper extended rotor coil, and durable construction. With proper use and maintenance, working life can reach 2 years at 8 hours per day.

Our Spindle Motor	Other Spindle Motor
Runout less than 0.005mm	Runout 0.05mm

High Accuracy & Concentricity

Further processing improves spindle accuracy. The spindle motor runout is less than 0.005mm, delivering up to 10 times higher precision than normal spindle motors.

 10 TIMES PRECISION RUNOUT OFF 

Easy and Fast Installation

The kit is equipped with pre-soldered aviation wire for quick installation, and the square spindle body has installation holes on both sides for convenient mounting.

 THE VFD HAS BEEN PROGRAMMED 

PACKAGE OF AIR COOLED SPINDLE MOTOR

Whether you are a hobbyist or a professional CNC workshop, Zhong Hua Jiang can provide a suitable air cooled spindle motor solution. If the standard configuration does not meet your needs, our sales and engineering team can customize a spindle motor kit for your machine, material, voltage, and production requirements.

RECOMMEND AIR COOLED SPINDLE MOTOR KIT

Besides the Zhong Hua Jiang 3KW ER20 Air Cooled Spindle Motor Kit, we offer 0.5KW, 0.8KW, 1.5KW, 2.2KW, 3KW, and 4KW air cooled spindle motor kits for different CNC machine sizes and machining requirements.

 ROUND 

ER11 0.5KW Air Cooled Spindle Motor Kit

ER11 0.8KW Air Cooled Spindle Motor Kit

ER11 1.5KW Air Cooled Spindle Motor Kit

ER16 1.5KW Air Cooled Spindle Motor Kit

ER20 2.2KW Air Cooled Spindle Motor Kit

ER20 3KW Air Cooled Spindle Motor Kit

 Square 

ER11 1.5KW Air Cooled Spindle Motor Kit

ER16 1.5KW Air Cooled Spindle Motor Kit

ER20 2.2KW Air Cooled Spindle Motor Kit

ER20 3KW Air Cooled Spindle Motor Kit

ER25 4KW Air Cooled Spindle Motor Kit

COMPANY PROFILE

 CNC SPINDLE MOTOR MANUFACTURER 

WHY CHOOSE US

Quality Assurance Superior quality performance Strict quality control	Patents and Certifications Several patents for air-cooled spindle motors	Additional Brand Value Brand value highly recognized by the market
Reasonable Price Direct factory sales High cost performance	Full Time Service Professional technical support Quick customer service	Fast and Reliable Delivery Fast and efficient delivery Real-time tracking and updates

 LEADING CNC MACHINE / CNC SPINDLE MOTOR MANUFACTURER SINCE 2000 

OUR PRODUCT RANGE

CNC Router Machines

Zhong Hua Jiang CNC router machines, including 3018, 3020, 3040, and 6090 models, are designed for precision engraving, cutting, and small-batch production.

CNC Spindle Motors

Our spindle motor range includes air cooled and water cooled spindle motors for woodworking, acrylic, plastics, PCB, and soft metal processing.

CNC Accessories

CNC accessories include limit switches, Z probes, emergency stop buttons, collets, clamps, and other parts for safer and more accurate CNC operation.

Electrical Wires

Double-shielded cables and shielded chain cables help reduce signal interference and improve connection reliability in CNC systems.

Stepper Motors

High-performance stepper motors provide precise motion control for CNC routers, engraving machines, and automation equipment.

PRODUCT CERTIFICATION

CUSTOMER FEEDBACK

FAQ

1. What materials can the 3KW Air Cooled CNC Spindle Motor work with?

It is suitable for engraving, cutting, and milling wood, acrylic, MDF, plastics, PCB boards, PVC, plexiglass, and soft metals such as aluminum and brass. Final performance depends on tool type, spindle speed, feed rate, material hardness, and CNC machine rigidity.

2. What specifications does the spindle motor offer?

The kit includes a 3KW square air cooled spindle motor, 3.7KW VFD inverter, ER20 collet set, drill bits, aviation wire, power wire, and wrenches. The spindle supports high-speed CNC machining with accurate speed regulation and low runout.

3. Is this 3KW air cooled spindle motor suitable for a CNC router upgrade?

Yes. It is a practical upgrade for CNC routers that need stronger cutting power, ER20 tool compatibility, stable VFD speed control, and air cooling without additional water cooling equipment.

4. Can I purchase the 3KW Air Cooled CNC Spindle Motor in bulk or as a distributor?

Yes. Zhong Hua Jiang has over 20 years of R&D and manufacturing experience, and we welcome global distributors, resellers, and wholesalers. We offer factory-direct pricing, stable supply, and export support.

5. Do you offer OEM or customization services?

Yes. OEM and ODM customization is available for logo, packaging, voltage specifications, collet type, bearing configuration, wire length, and kit combination. Our engineering team can tailor the ER20 3KW Air Cooled CNC Spindle Motor to project requirements.

6. What is your minimum order quantity (MOQ)?

We are flexible with order quantities. For standard kits like the ER20 3KW Air Cooled CNC Spindle Motor, small trial orders are accepted before bulk purchases. For OEM or customized kits, MOQ can be discussed based on project details.

7. How long is your production and delivery time?

For standard kits, typical lead time is 3-7 working days after payment. For large or customized orders, production usually takes 10-20 days. Shipping time depends on destination country and logistics method.

8. What kind of warranty do you provide for the 3KW Air Cooled CNC Spindle Motor?

The spindle motor, VFD inverter, and accessories are covered by a 12-month warranty. Each kit is inspected before shipping, and quality-related parts are supported during the warranty period.

9. Do you provide after-sales technical support?

Yes. Zhong Hua Jiang offers lifetime technical support by email, video call, or online chat. Our engineers can assist with installation, VFD parameter setup, wiring, speed control, and troubleshooting.