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

ER20 3kW Air-Cooled CNC Spindle Motor Kit with VFD

The Zhong Hua Jiang ER20 3kW round air-cooled CNC spindle motor kit combines a Ø100mm spindle motor with a 3.7kW VFD inverter and installation accessories. It is designed for CNC router builders, equipment distributors, machine maintenance providers and professional engraving, routing and woodworking workshops.

The available electrical versions are listed as 220V and 380V. Select the spindle and VFD together according to your supply voltage, motor nameplate and CNC controller requirements.

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ER20 3kW Air-Cooled Spindle Kit Video

Zhong Hua Jiang CNC Product Catalogue (PDF)

   CNC Router Machine Catalogue 2025.pdf

ER20 3kW Spindle VFD Kit for CNC Router Buyers

This 3kW ER20 air-cooled spindle kit is intended for CNC router assembly, spindle replacement, equipment refurbishment and stocked spare-part programs. The 100mm round body suits compatible clamp mounts and provides ER20 tool holding for woodworking, plastics processing and suitable light-duty soft-metal work.

Compared with a motor-only purchase, the kit groups the 3kW spindle, 3.7kW VFD, Ø100mm clamp, ER20 collets, drill bits, aviation wire, power wire and two wrenches. Confirm the exact supplied configuration before placing a production or distributor order.

Air cooling eliminates the water pump, tank and coolant circuit required by water-cooled spindle installations. Buyers should still provide clear airflow around the motor and select machining conditions suited to the workpiece, cutter diameter and machine rigidity.

Discuss 3kW Spindle and VFD Compatibility

ER20 3kW Air-Cooled Spindle and VFD Specifications

The tables below distinguish spindle specifications from kit contents. The kit uses a 3.7kW VFD; the 9kg weight refers to the spindle motor, not the complete packed kit.

Confirm Motor Specifications and Kit Contents

For VFD commissioning, confirm the selected 220V or 380V motor rating, supply phase, VFD input and output ratings, rated frequency, acceleration settings, grounding and cooling airflow. The maximum operating speed must be checked against the selected spindle nameplate.

CNC Router Applications for the 3kW ER20 Spindle

Wood Engraving and CNC Routing

For wood signs, cabinet panels, MDF boards, plywood components and routed profiles. Choose the cutting tool, feed and depth of cut according to material density and machine stiffness.

Acrylic, PVC and Plastic Machining

For acrylic lettering, display panels, plastic components and PVC sheet routing where cutter geometry and chip evacuation affect edge quality.

Light-Duty Aluminum and Brass Engraving

For suitable light-duty engraving and milling projects using appropriate tools and conservative cutting settings. Check rigidity, workholding and spindle load before machining metal.

Key Features of the Ø100mm ER20 3kW CNC Spindle Kit

A matched spindle-and-VFD package supports speed adjustment, ER20 tool holding, air cooling and simpler sourcing for CNC router manufacturers and professional users. Actual performance depends on the installed motor version and the machine operating conditions.

The supplied accessory list includes the Ø100mm spindle clamp, 13 ER20 collets (1–13mm), 10 drill bits (0.8–3mm with 1/8-inch shank), aviation wire, power wire and two wrenches. Confirm final packaging with your quotation.

Matched VFD Speed Control

The 3.7kW VFD provides adjustable motor speed once matched to the correct 3kW spindle voltage and rated frequency. Set motor data according to the supplied documentation before operation.

ER20 Collet Tool Holding

The ER20 system accepts the listed 1–13mm collets and can accommodate suitable routing, drilling and engraving tools within the collet and spindle limitations.

CNC Controller Interface

Integration with CNC controllers depends on the VFD model and the controller output interface. Check terminal wiring, run commands and analog or digital speed-control compatibility for your machine.

Electrical and Cable Connections

The kit includes an aviation cable and power cable. Wire size, VFD input voltage, grounding and motor terminal connections should be checked by a qualified technician.

Rated Speed and VFD Setup

The specification list gives a working speed range of 10,000–18,000 RPM. Confirm the allowable upper speed and frequency on the exact motor nameplate before commissioning.

Air Cooling without a Water Circuit

The Ø100 × 308mm motor has an air-cooled structure, reducing the need for pumps and coolant plumbing. Leave sufficient ventilation space, and keep cooling passages clean.

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Benefits of the ER20 3kW Air-Cooled Spindle Motor

Advanced Dynamic Balance Design

Dynamic balancing is intended to limit vibration at the spindle operating speed. Cutting finish also depends on collet condition, tool balance, material and machine alignment.

Extended Working Life

The spindle design uses steel bearings and a copper-winding motor construction. Service life depends on correct VFD setup, spindle loading, ventilation and bearing care.

Our Spindle Motor	Other Spindle Motor
Illustrative runout image: <0.005mm	Illustrative comparison image: 0.05mm

High Accuracy & Concentricity

Spindle runout affects tool path accuracy and surface finish. The visual comparison below shows an illustrative <0.005mm measurement alongside a 0.05mm example; precision should be assessed using a stated measurement point, tool and test method.

Precision reference: compare measured runout using consistent tools and inspection conditions.

Easy and Fast Installation

The supplied clamp and cables simplify procurement for spindle installation. The VFD may arrive with settings prepared, but the installer must verify all voltage, motor, frequency and protection parameters before first use.

Before commissioning: verify the supplied VFD parameters against the selected motor nameplate.

Ask About ER20 Spindle Runout and VFD Setup

Packaging and Wholesale Supply of the 3kW Spindle Kit

Zhong Hua Jiang supplies CNC machine builders, equipment distributors, spare-parts resellers and production workshops. For multi-unit orders, confirm the kit contents, VFD input voltage, packaging, product identification and required documents in advance.

Request Bulk and OEM Kit Pricing

Related Round and Square Air-Cooled Spindle Kits

Explore lower-power round spindle kits and alternative square air-cooled configurations for different machine sizes and mounting arrangements. The product cards below link to their individual specifications; compare each model before substituting it for the &Oslash;100mm round ER20 3kW kit.

Round Air-Cooled Spindle Kits

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

Square Air-Cooled Spindle Kits

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

About Zhong Hua Jiang CNC Spindle Motor Manufacturing

CNC Spindle Motor Manufacturer Since 2000

Why Choose Zhong Hua Jiang as a CNC Spindle Supplier

Quality Assurance Spindle motor manufacturing and inspection Quality inspection before shipment	Patents and Certifications Air-cooled spindle technology and patent history	Additional Brand Value Zhong Hua Jiang brand and CNC product catalogue
Reasonable Price Direct factory sales Wholesale and model-selection discussions	Full Time Service Professional technical support Sales and technical enquiries	Fast and Reliable Delivery Order-specific shipping and logistics coordination Shipping and order status enquiries

CNC Spindle Motor Manufacturing Since 2000

Related CNC Equipment and Spindle Accessories

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 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 and Factory Documentation

Customer Feedback and CNC Spindle Applications

How to Specify the Correct 3kW CNC Spindle Kit

To replace an existing spindle or prepare an OEM CNC router build, verify the motor body diameter, mounting clearance, ER20 tool-shank size and cutting application. Confirm the 220V or 380V motor and 3.7kW inverter combination with your site power supply and machine control system.

When requesting a factory quotation, provide the spindle type, voltage, target operating speed, cutter dimensions, machine type, annual purchasing volume and destination market.

Discuss OEM Configuration and Wholesale Supply

FAQ: ER20 3kW &Oslash;100mm Air-Cooled Spindle VFD Kit

1. What materials can the ER20 3kW spindle kit machine?

Wood, MDF, acrylic, PVC and other plastics are common applications. Light-duty aluminum and brass work may be possible with suitable workholding, tooling, feeds, speeds and machine rigidity.

2. What components are supplied in this 3kW CNC spindle kit?

The listed package contains a &Oslash;100mm round 3kW air-cooled spindle, a 3.7kW VFD inverter, &Oslash;100mm clamp, 13 ER20 collets (1&ndash;13mm), 10 drill bits, aviation cable, power cable and two wrenches.

3. What is the difference between air-cooled and water-cooled spindles?

Air cooling does not need a coolant pump, tank or hoses, simplifying the machine installation. Water-cooled alternatives use a liquid-cooling loop and may suit different noise or environmental requirements.

4. Can distributors and CNC machine manufacturers order in bulk?

Yes. Zhong Hua Jiang supplies distributors, wholesalers, CNC router manufacturers and maintenance companies. Share the model, voltage, quantity and destination for a quotation.

5. Can Zhong Hua Jiang discuss OEM branding and customized kits?

OEM branding, packaging, cable requirements and configuration requests can be reviewed based on the project scope. Obtain written confirmation of the final specification before ordering.

6. What is the minimum order quantity for wholesale orders?

Order quantities can be discussed, including trial orders for standard kits. MOQ for branded or customized configurations should be confirmed for each order.

7. What is the typical production and shipping lead time?

The supplier publishes a typical 3&ndash;7 working days after payment for standard kits and 10&ndash;20 days for larger or customized orders. Actual availability and shipment dates depend on the order and must be confirmed.

8. What warranty applies to the spindle and inverter?

The listed warranty is 12 months for the spindle motor, inverter and accessories. Confirm the applicable terms, exclusions and claims process before purchase.

9. Is technical support available for VFD installation?

Zhong Hua Jiang states that technical assistance is available for installation, VFD parameter setup, wiring and troubleshooting. Consult a qualified technician for mains wiring and electrical safety.

10. Is the product a motor-only unit or a motor-and-VFD kit?

This listing is a complete kit with a 3kW motor and a 3.7kW VFD. For a motor-only replacement, specify that requirement when requesting a quotation.

11. Is the spindle body round or square?

This model is the &Oslash;100mm round air-cooled spindle. Square-housing models have different mounting arrangements and should not be treated as direct mechanical substitutes.

12. Does the kit support 220V and 380V operation?

The listing identifies 220V and 380V versions. The correct motor winding and compatible VFD must be selected for the destination electrical supply; one unit should not be assumed to accept both voltages.

13. What is the permitted spindle operating speed?

The model specification lists 10,000&ndash;18,000 RPM. Confirm the actual rated speed, frequency and upper operating limit for the selected spindle before use.

14. Is the 3.7kW inverter compatible with the 3kW motor?

The kit includes a 3.7kW inverter described as matched to the spindle. Check its input voltage, phase, output voltage, current rating and motor parameters for the selected variant.

15. Which ER20 collet sizes come with the kit?

The kit includes 13 ER20 collets covering 1&ndash;13mm. Confirm the specific size increments and the cutter-shank requirements for your production tools.

16. What is the spindle diameter and overall length?

The product specification lists an approximately &Oslash;100 &times; 308mm motor body. Confirm mounting length, clamp location and end clearance against the product drawing for installation.

17. What is the published motor weight?

The spindle motor is listed at 9kg. This is not the complete shipping weight of the motor-and-VFD kit, which depends on the accessories and protective packaging.

18. What precision or runout can buyers expect?

The visual runout comparison is illustrative. Request test conditions and inspection results for the ordered configuration rather than assuming a guaranteed runout value for every motor.

19. Can this spindle work with GRBL and other CNC controls?

Control integration depends on the inverter interface and the CNC controller outputs. Check available run/stop signals, analog or digital speed commands and wiring instructions before connecting.

20. What details should be included in a distributor quotation request?

Provide the required input voltage, quantity, ER20 cutter-shank sizes, machine mounting dimensions, target market, cable requirements and delivery destination so the kit can be checked and quoted.

21. What preparation is required before starting the spindle?

Verify grounding, wiring, motor ratings, VFD current and frequency limits, collet installation, cooling airflow and machine emergency-stop functions. Follow the supplied equipment instructions.

22. Can the kit be used for aluminum milling?

Light aluminum milling may be suitable with correct cutting parameters and a rigid CNC machine. Evaluate cutter diameter, tool holding, feed rate, chip removal and spindle load for the specific process.

Request a Quote for the ER20 3kW VFD Kit