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ER20 100mm 3KW Round Air Cooled
220V/380V
10000-18000 RPM
8.8kg
Air cooled
ER20
3KW
10A
Ф100mm*308mm
Zhong Hua Jiang offers the ER20 3kW Ø100mm round air-cooled CNC spindle motor for machine builders, CNC router manufacturers, replacement-parts distributors and professional engraving workshops. This is a standalone spindle motor, designed for operation through a separately matched 300Hz variable-frequency drive (VFD).
Request Wholesale Pricing for the 3kW Round Spindle
CNC Router Machine Catalogue 2025.pdf
This 3kW ER20 round air-cooled spindle motor is intended for CNC router assembly, replacement spindle projects, woodworking equipment, sign-making machinery and suitably configured light-duty metalworking tasks. A cylindrical Ø100mm housing allows installation with a correctly sized round spindle mount.
The published product attributes list 220V / 380V electrical versions, ER20 collet interface, 300Hz frequency and 10,000–18,000 RPM operating speed. The correct voltage, VFD output and spindle nameplate ratings must be checked for each ordered version.
Unlike a water-cooled spindle, this model uses air cooling and does not need a cooling-water tank, circulation pump or coolant hoses. Adequate airflow around the motor remains important, particularly when enclosed in CNC equipment or installed near chip- and dust-producing operations.
Discuss Ø100mm CNC Spindle Compatibility
The table below separates motor ratings from supply scope. The 8.8kg motor weight and Ø100 × 308mm dimensions follow the published product specification for this listing. Confirm the nameplate values of the ordered variant.
| Specification | Details |
|---|---|
| Product | ER20 3kW Ø100mm Round Air-Cooled CNC Spindle Motor |
| Motor power | 3kW |
| Housing / cooling | Ø100mm round body; air-cooled |
| Motor body dimensions | Ø100 × 308mm |
| Motor weight | Approximately 8.8kg |
| Voltage variants | 220V / 380V; select the required motor version |
| Published current | 10A; verify each variant on the motor nameplate |
| Published rated frequency | 300Hz |
| Published operating speed | 10,000–18,000 RPM; verify the permitted maximum for the supplied motor |
| Tool-holding interface | ER20 |
| VFD requirement | A compatible external 300Hz VFD is required and is not part of the motor-only supply |
| Typical machines | CNC routers, engraving machines and suitably configured woodworking equipment |
| Voltage | 220V/380V | 1 pcs 3KW Round Spindle Motor |
| Speed | 10,000–18,000 RPM | 1 pcs pre-soldered aviation wire for quick installation |
| Power | 3KW | This spindle should be equipped with 300Hz VFD |
| Electric Current | 10A | Confirm against nameplate |
| Frequency | 300Hz | Match VFD parameters |
| Weight | Approx. 8.8kg | Motor mass; excludes packaging |
| Connection | ER20 | Select an ER20 collet separately |
| Cooling | Air Cooled | Allow unobstructed airflow |
| Usage | CNC Routing and Engraving | Confirm machine suitability |
Use suitable cutters, workholding and extraction for wood panels, decorative carving, MDF engraving and CNC routing.
Machining results depend on cutter geometry, chip evacuation and cutting settings suitable for acrylic or plastic workpieces.
Light non-ferrous metal work requires appropriate cutting conditions, rigid machine construction and proper chip removal.
For OEM CNC machine builders and spindle replacement projects, the ER20 3kW motor provides a round Ø100 × 308mm body, air cooling and an ER20 tool-holding interface. The published motor weight is approximately 8.8kg; support structures must account for both spindle mass and machining forces.
A compatible VFD is required to operate the spindle. The manufacturer describes 300Hz frequency and 10,000–18,000 RPM speed for this motor configuration. Set the inverter according to the actual motor nameplate; do not exceed the approved speed or frequency limits stated on the motor nameplate.
The maker highlights an air-cooled design, dynamic balancing and a four-bearing spindle structure. Bearing material and precision requirements can be specified when requesting a technical datasheet or inspection details for a particular production batch.
Spindle speed is controlled through an appropriately sized, correctly configured external VFD. Confirm power supply, VFD motor-output voltage, current limits, frequency settings, rotation direction and acceleration parameters before commissioning the machine.
The ER20 collet system provides interchangeable tool holding for compatible cutter-shank diameters. Select an ER20 collet that matches the actual tool shank, and follow the limits applicable to the spindle and cutter.
A matched VFD can interface with a CNC controller according to the drive model and controller capabilities. Verify wiring, analogue or digital speed commands, switching signals and electrical interference precautions before connecting the system.
The product is listed in 220V and 380V versions, with 10A published current. Do not assume one VFD wiring setup applies to both voltages; select a matching drive and confirm the motor nameplate data.
The published speed specification is 10,000–18,000 RPM for this 300Hz motor. Use the drive settings and cutting parameters suitable for the specific workpiece material, tool, machine rigidity and operating duty.
The cylindrical housing measures Ø100 × 308mm, with a published weight of approximately 8.8kg. Provide suitable clamp engagement, sufficient clearance around the electrical connector and open airflow for the air-cooling system.
Request Spindle Dimensions and Electrical Details
Dynamic balancing is part of the spindle design and can help reduce vibration at high speeds. Actual vibration during CNC machining also depends on cutter balance, tool overhang, collet condition, machine structure and correct installation.
The manufacturer describes a four-bearing spindle construction and copper-rotor winding details. Long-term performance depends on spindle load, environmental conditions, maintenance and correct VFD setup rather than a fixed service-life expectation.
| Our Spindle Motor | Other Spindle Motor |
 |  |
| Runout less than 0.005mm | Runout 0.05mm |
The runout figures shown in the comparison table are illustrative readings; precision-critical orders should specify the test position, ER20 collet, measuring instrument and acceptance criteria.
The comparison above illustrates spindle runout under a particular test setup. For tolerance-sensitive purchasing, specify how runout must be measured, the test location, instrument and acceptance criterion. Comparison images alone are not a guarantee for every delivered motor.
Precision and concentricity should be evaluated together with the ER20 collet, cutting tool and spindle inspection method. Request the relevant inspection documentation if your machine requires a defined runout tolerance.
The product is supplied with a pre-soldered aviation connection wire for the standard motor-only package. Installation requires a suitable Ø100mm spindle clamp or compatible mount and an external VFD selected for the ordered electrical version.
Get a Motor-Only Supply Quotation
The standard motor-only package identifies a standalone motor and an aviation connection wire. A VFD, Ø100mm clamp, collet sets and cutting tools are not stated as included with this motor-only option; request a separate quotation if these parts are needed.
| 1x | 1 pcs 3KW Round Air Cooled Spindle Motor |
| 1x | 1 pcs pre-soldered aviation wire for quick installation |
| Note | Requires a matching 300Hz VFD; inverter is not included in the motor-only package. |
Buyers can request the 3kW round air-cooled motor for replacement purchases, OEM CNC router builds or distribution. For accurate selection, provide the required voltage, machine model, mount diameter, existing VFD information and forecast order quantity.
Request an OEM or Distributor Quote
Zhong Hua Jiang also lists smaller and larger spindle motors and separate round or square VFD kits. The linked products below are alternatives rather than components included with this 3kW round motor-only listing.
Ask About Motor and VFD Kit Options
Round Air Cooled Spindle Motor Kits
Square Air Cooled Spindle Motor Kits
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Quality AssuranceSpindle product range and manufacturing inspection Strict quality control | Patents and CertificationsSeveral patents for air-cooled spindle motors | Additional Brand ValueZhong Hua Jiang brand for CNC spindle products |
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Reasonable PriceDirect factory sales Pricing available by model and order quantity | Full Time ServiceProfessional technical support Quick customer service | Fast and Reliable DeliveryDelivery timing confirmed with each order Shipment information as agreed with buyer |
Zhong Hua Jiang CNC router models include the 3018, 3020, 3040 and 6090 families used for routing, engraving and selected machine-building applications.
The spindle range covers round and square air-cooled designs, water-cooled CNC spindles, and spindle-and-VFD kits. Specify whether your project requires a motor only or a bundled drive solution.
Accessories include collet tooling, spindle mounting components, limit switches, Z probes and emergency-stop controls for compatible CNC systems.
Electrical products include double-shielded and cable-chain wiring used in CNC installations. Cable ratings and shielding should be chosen for the actual machine and drive.
Stepper motors and motion-control components are available for CNC router, engraving and machinery integration projects.
Contact Zhong Hua Jiang for Bulk Orders
The following materials are general manufacturer documentation. Request current certificate copies applicable to your ordered motor model and destination market.
This listing is for the standalone 3kW round spindle motor. A compatible VFD must be selected separately unless a quotation explicitly includes a drive. Zhong Hua Jiang also offers separate spindle-and-VFD kit listings.
The product attributes list a 3kW motor, Ø100 × 308mm housing, ER20 interface, 220V/380V versions, 300Hz operating frequency and approximately 8.8kg motor weight.
The specified operating range is 10,000–18,000 RPM for the 300Hz configuration. Before setting the maximum speed, verify the rating on the supplied motor nameplate.
The spindle requires a variable-frequency drive matched to its electrical ratings. The listed frequency is 300Hz; motor current, rated voltage, limits and protection settings must be configured for the specific model.
Do not connect a high-frequency spindle directly to mains power. Use a suitable VFD and follow the applicable motor and inverter wiring instructions.
The product lists 220V and 380V variants. Specify one version when placing your order and match the drive output to the selected motor voltage and current.
The cylindrical motor body is Ø100mm. Check the machine mounting clamp, load capacity and tool clearance; a square spindle mounting bracket is not interchangeable with the round housing.
The motor-only package lists the motor and pre-soldered aviation wire. A clamp mount is not explicitly included in that list, so request it separately if required.
ER20 accepts interchangeable collets for appropriately sized tool shanks. Verify the selected collet size, cutter type and permissible operating speed against the spindle and tooling specifications.
Yes, wood routing, MDF shaping, woodworking signs and engraving are listed applications. Choose suitable cutting tools, spindle speeds, dust removal and cutting loads for the machine.
These are listed applications. Cutter geometry, chip evacuation, feed rate and spindle speed affect heat generation and surface finish, especially in thermoplastic materials.
Light non-ferrous metal engraving or machining may be possible using a sufficiently rigid CNC machine and correct tooling. Confirm workholding, chip control and cutting parameters before production.
This model has an Ø100mm cylindrical housing intended for a compatible circular mount. Square models have a different body and mounting interface. Match the housing dimensions and fastening system to the machine.
An air-cooled spindle does not need a water-circulation pump, tank or plumbing. It does need adequate ventilation. Water-cooled spindle models use a separate liquid cooling circuit and different installation requirements.
This motor has an ER20 collet interface. An automatic tool-changing mechanism is not specified. Request a dedicated ATC spindle if automatic tool changes are required.
The runout comparison image illustrates a specific test setup. A guaranteed value should be agreed using a defined measurement position, test method and acceptance procedure for the exact motor order.
Bearing materials and configurations should be confirmed against the selected spindle model and its datasheet. Contact Zhong Hua Jiang if your application requires ceramic bearings or a particular bearing arrangement.
The listed package contains one 3kW round air-cooled spindle motor and one pre-soldered aviation wire. Confirm any additional accessories in the final quotation.
Zhong Hua Jiang works with equipment manufacturers, resellers and distributors. Send required voltage, order quantity, destination market and machine application for a commercial quotation.
OEM configurations, branding and packaging may be discussed according to the project. Confirm engineering feasibility, MOQ and any additional costs before ordering.
The required quantity depends on the selected version, customization and commercial agreement. Include your trial quantity and planned volume in your inquiry to receive an applicable MOQ.
Production and dispatch depend on order quantity, configuration, stock and transport method. Request a written lead-time confirmation when obtaining a quotation.
The manufacturer describes a 12-month warranty and technical support. Confirm the specific coverage, exclusions, service process and current terms in the quotation or order agreement.
Send a photo of the old spindle nameplate, motor voltage, VFD model, mounting diameter, spindle body dimensions, ER collet requirements, machining application and requested quantity.
