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Zhong Hua Jiang ER20 3kW water-cooled CNC spindle kit includes a 100mm motor, 3.7kW VFD, clamp mount, pump, 5m hose, ER20 collets and drill bits for CNC router integration.
ER20 100mm 3KW Round Water Cooled Kit
220V/380V
10000-24000 RPM
8.8kg
Water Cooled
ER20
3KW
10A
Ф100mm*309mm
The Zhong Hua Jiang ER20 3kW water-cooled spindle motor kit combines a Φ100mm CNC spindle, a 3.7kW variable frequency drive (VFD), a matching spindle clamp, circulating-water accessories and ER20 tooling components. It is intended for CNC router manufacturers, professional engraving workshops, equipment integrators and wholesale distributors selecting a complete spindle-drive package.
The listed spindle body measures Φ100 × 309mm and weighs 8.8kg. The published spindle speed range is 10,000–24,000 RPM with a 400Hz frequency rating. The motor is offered in 220V and 380V configurations; the chosen spindle voltage and VFD output must be matched before installation.
Request 3kW ER20 VFD Kit Wholesale Pricing
This video demonstrates a Zhong Hua Jiang CNC spindle product. Confirm the exact motor and VFD variant from the quotation and nameplate rather than using the video as a substitute for configuration-specific technical documentation.
CNC Router Machine Catalogue 2025.pdf
The downloadable catalogue presents the manufacturer’s broader CNC equipment and spindle product range. For machine integration, request the latest drawing and electrical information for the exact ER20 3kW water-cooled kit supplied.
The 3kW water-cooled CNC spindle kit is designed for routing, carving, engraving and appropriate light milling operations. A supplied 3.7kW VFD provides frequency-controlled spindle operation, while the included water pump and 5m hose support an external coolant circuit. The ER20 toolholding system is designed for properly matched ER20 collets and cutting tools.
This product differs from a motor-only spindle: the published kit includes the drive, a Φ100mm clamp mount, a water pump, an ER20 collet set, ten drill bits and installation accessories. Buyers upgrading an existing CNC machine should confirm machine stiffness, the 100mm mounting interface, Z-axis payload, available electrical supply and cooling arrangements.
Typical applications include woodworking and MDF routing, acrylic and PVC machining, plastic engraving and selected operations involving aluminum or brass. Actual machining capability depends on the cutter, feed and speed, workholding, chip evacuation, machine rigidity and other processing conditions.
For OEM projects, distributors and recurring purchases, specify the required motor voltage, destination market, machine controller, tool-shank sizes and expected order quantity to establish an accurate commercial and technical quotation.
Get a Complete Spindle Kit Quotation
The kit listing specifies a Φ100mm round 3kW water-cooled motor, 3.7kW VFD, ER20 interface and 10,000–24,000 RPM published spindle speed range. The corresponding motor page lists 220V/380V motor options, 400Hz operating frequency and a 10A current figure; confirm the rated current for the exact voltage version shown on the supplied motor nameplate.
| 1x | Ф100mm 3KW Round Spindle Motor |
| 1x | 3.7KW VFD Inverter |
| 1x | Ф100mm Clamp Mount |
| 1x | Water Pump |
| 1x | 5 Meter Water Hose |
| 13x | Collets ER20(1mm-13mm) |
| 10x | Drill Bits(0.8-3mm, 1/8" Shank) |
| 1x | Aviation wire |
| 1x | Power wire |
| 2x | Wrenches |
| Spindle motor Size: Ф100mm*309mm | |
| Spindle Weight: 8.8kg |
Published kit quantities: 1 × 3kW Φ100mm water-cooled spindle; 1 × 3.7kW VFD; 1 × Φ100mm clamp; 1 × water pump; 1 × 5m water hose; 13 × ER20 collets, identified as 1–13mm; 10 × drill bits, identified as 0.8–3mm with 1/8-inch shanks; 1 × aviation wire; 1 × power wire; and 2 × wrenches.
Drive and voltage selection: A 3.7kW VFD rating does not automatically establish compatibility with every mains supply or spindle-voltage version. Check the VFD input supply, output voltage, current rating, maximum output frequency, control terminals and actual motor nameplate before commissioning. Do not connect the high-frequency spindle directly to line power.
Tooling dimensions: ER20 collets are listed from 1mm through 13mm. Use a collet suited to the actual tool shank and verify each cutter’s permissible RPM and balance before installation. The drill-bit assortment is separate from the thirteen-collet set.
Confirm 220V or 380V VFD Kit Configuration
Check the following integration points when selecting a 3kW spindle and 3.7kW drive for a new CNC router or a replacement spindle assembly.
| Component | Selection information |
| Spindle power | 3kW motor; 3.7kW VFD supplied as listed |
| Motor voltage | 220V / 380V variants; match to VFD output and motor nameplate |
| Spindle operating frequency | 400Hz published motor rating; confirm VFD output frequency capability |
| Spindle speed | 10,000–24,000 RPM published range; verify permissible settings |
| Mounting diameter | Φ100mm clamp and cylindrical spindle housing |
| Overall spindle length and weight | 309mm published length; 8.8kg published motor weight |
| Tool holding | ER20; select matching tool shanks, collets and rated cutters |
| Cooling | External circulating water system; pump and 5m hose listed |
| Electrical commissioning | Qualified installation, protective earth, motor nameplate and VFD parameter verification |
Spindle selection depends on the whole machine and the process. The examples below illustrate common workpiece categories; tool selection, feeds, speeds, coolant strategy, dust extraction and material handling must be determined for each job.
Use suitable router bits and clamping for wood engraving, sign production, panel profiling, decorative carving and edge trimming. Match cutter diameter and working speed to the wood species or board material, machine rigidity and chip-removal capability.
For acrylic sheet, PVC and plastics, appropriate cutter geometry, feed rate and chip evacuation help minimize melting, burrs and poor edge finish. The spindle water circuit manages motor heat; it is separate from any coolant or lubrication required at the cutting edge.
Selected aluminum and brass processes may be feasible with appropriate cutters, conservative machining loads, secure workholding and a sufficiently rigid CNC frame. Check torque at the actual operating speed and do not assume that 3kW spindle power alone qualifies a machine for heavy metal removal.
Discuss Your Material and CNC Application
The integrated package combines the spindle, a separately mounted VFD, mounting hardware, water-cooling accessories and ER20 tooling components. These elements support system assembly when they are installed and configured for the specific CNC machine.
The included 3.7kW inverter is used to control motor output frequency, spindle rotation and the required start/stop functions. Verify the drive’s voltage class and the motor’s 400Hz rating. The statement that the VFD has been programmed should not replace a check of voltage, rated current, maximum/minimum frequency, acceleration, protection and controller interface parameters before use.
The published contents include thirteen ER20 collets identified as sizes 1–13mm. Select the collet that matches the cutting-tool shank, maintain clean mating surfaces and use compatible ER20 nuts and tooling. Confirm the permitted rotation speed of each cutter and tool assembly.
A supported CNC controller or PLC may command the VFD using the interfaces provided by the exact inverter model. Speed commands, run/stop wiring, emergency-stop architecture and grounding must be reviewed as part of the CNC machine electrical design. The spindle motor itself is not an independent motion controller.
The product information lists 220V and 380V versions. Identify the required motor voltage in the purchase request, and ensure the supplied 3.7kW drive can deliver the corresponding motor output voltage and current. Do not treat a single advertised current number as a confirmed rating for every voltage variant.
The motor has a published Φ100mm outside diameter and 309mm overall length, with a matching clamp listed in the kit. Verify the machine’s Z-axis travel, mounting plate, spindle weight allowance and clearance for coolant and power connections.
The kit includes a water pump and five meters of hose for a recirculating coolant system. A suitable reservoir or chiller, secure connections and adequate circulation are required for normal operation. Confirm pump voltage, flow requirements and coolant compatibility for the ordered configuration.
Request Spindle and VFD Technical Details
The manufacturer describes a four-bearing spindle construction and dynamic balancing. Tool runout and service life depend on the precise motor configuration, bearing condition, cutter balance, operating load and maintenance. Procurement requirements should state the test method and acceptance criteria.
Dynamic balancing is intended to limit unwanted vibration during high-speed rotation. Actual operating noise and machining finish also depend on tool balance, ER20 collet condition, clamp alignment, workpiece setup and CNC structural resonance.
The product description mentions four upgraded steel bearings and a copper rotor winding. The original material presents indicative long-service-life figures, but actual operating life varies with cutting load, motor temperature, coolant circulation, contamination, speed and maintenance.
| Zhong Hua Jiang Spindle Example | Illustrative Comparison |
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| Published example: runout below 0.005 mm | Illustrative comparison: 0.05 mm |
The comparison illustration cites spindle runout below 0.005mm against a separate comparison figure. These are published illustrative values rather than a substitute for a lot-specific inspection report. Buyers requiring a contractual tolerance should specify the measurement location, reference tool or test bar, indicator method and acceptance conditions.
The kit includes aviation and power wiring along with the VFD. Before rotation, confirm protective-earth continuity, motor-to-drive connections, rated parameters, correct rotation direction and uninterrupted cooling flow. Have a qualified installer verify electrical safety and the CNC stop system.
The kit contents table above identifies the spindle, VFD, Φ100mm mount, water pump, 5m hose, 13 ER20 collets, 10 drill bits, aviation wire, power wire and two wrenches. The photographs below illustrate product packaging; the written quotation and packing list determine the exact delivered configuration.
For export orders or OEM assemblies, specify whether a coolant reservoir/chiller, compatible controller interface, additional extension cables, spare ER20 nuts or application-specific cutting tools are needed. Such items should be confirmed in the quotation rather than assumed to be part of the published standard package.
Confirm Full Kit Contents for Your Order
This listing is a complete ER20 3kW VFD kit. The separately sold ER20 3kW motor-only version is an alternative for CNC builders who already have a compatible drive, cooling loop and installation hardware.
| Component | This ER20 3kW VFD kit | Separately offered motor only |
| 3kW Φ100mm water-cooled spindle | Included | Included |
| 3.7kW VFD inverter | Included | Not listed in the standard motor-only package |
| Φ100mm clamp mount | Included | Confirm separately |
| Water pump and 5m hose | Included | Not listed as standard motor-only inclusions |
| ER20 collets, drill bits and wrenches | Included as listed in the kit table | Confirm separately |
| Wiring accessories | Aviation wire and power wire listed | Pre-soldered aviation wire listed |
Compare Motor-Only and Complete Kit Pricing
Alternative kit power classes may better suit a smaller CNC machine, lighter spindle mount or different tooling requirement. Use these original product links to compare the ER11 1.5kW and ER20 2.2kW water-cooled spindle VFD kits.
Huajiang describes its CNC engraving spindle manufacturing history as beginning in 2000, expanding into variable frequency drives and CNC router equipment, and introducing the Zhong Hua Jiang brand in 2018. OEM machine builders and distributors can discuss configurations, technical information and supply arrangements with its sales team.
The company describes spindle production and development experience along with patent work on selected air-cooled products. Company-level history and patents do not by themselves establish compliance or a patent claim for every particular water-cooled spindle kit.
The company also describes exporting CNC products internationally. Machine manufacturers sourcing a complete spindle kit may request configuration drawings, product-specific documentation, relevant test conditions and order-specific commercial terms.
Discuss OEM and Distributor Cooperation
For professional buyers, evaluate the suitability of the motor, VFD, cooling loop and tooling as a matched assembly. Confirm technical documentation, inspection criteria, the warranty scope and logistics with the supplier for the exact order.
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| Quality Assurance Superior quality performance Strict quality control | Patents and Documentation Several patents for air-cooled spindle motors | Additional Brand Value Established brand and product range |
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| Reasonable Price Direct factory sales Factory-direct sourcing | Full Time Service Professional technical support Close and quick customer service | Delivery Coordination Order-specific dispatch schedule Shipping information by arrangement |
When requesting a formal quotation, identify the motor voltage, destination country, required quantities, desired accessory configuration, and any inspection or documentation requirements.
The manufacturer offers CNC routers including 3018, 3020, 3040 and 6090 series. Match spindle mass, power demand and mounting requirements to the selected machine frame.
Compare water-cooled and air-cooled motor types, ER11 and ER20 toolholding systems, housing dimensions and power ratings when specifying new machine platforms.
Mounting clamps, coolant handling, Z probes, limit switches and machine safety accessories can be evaluated as part of machine integration.
Shielded power and control cables may help establish reliable wiring runs; choose cable specifications using the actual VFD and machine electrical requirements.
The company supplies stepper-motor products for CNC motion axes and related machine assemblies.
The image above is documentation displayed by the manufacturer. Ask which specific documents apply to the ordered 3kW spindle, the selected VFD, electrical supply and destination market before relying on a conformity claim.
The feedback image is provided as a product reference. Buyers who need production acceptance or repeatability information can request documentation relevant to their exact motor and inverter configuration.
Request Product Documents and Wholesale Pricing
The published kit includes one Φ100mm 3kW water-cooled spindle, one 3.7kW VFD, one 100mm mounting clamp, one water pump, one 5m hose, thirteen ER20 collets, ten drill bits, one aviation wire, one power wire and two wrenches.
Yes. The standard kit list specifies one 3.7kW VFD inverter. Check its input voltage, output voltage, output frequency and rated current for the chosen motor configuration.
The product listing identifies a 3kW spindle and a 3.7kW drive. Suitability depends on the drive’s actual electrical ratings and the specific motor nameplate, not solely on their published power numbers.
The supplier lists Φ100mm × 309mm. Check your Z-axis mounting structure, tool clearance, coolant connections and cable routing before installation.
The supplier lists a motor weight of 8.8kg. The mounting clamp, cables and tooling add to the supported mass on the machine axis.
The product is offered in 220V and 380V motor configurations. Specify your electrical supply and requested motor version so the supplier can confirm the exact included VFD input/output configuration.
Motor and VFD output voltage ratings must match. Do not connect mismatched equipment; select the correct drive output and have a qualified installer verify the complete configuration.
The related motor specification lists 400Hz. The included inverter must be set up to deliver the motor’s appropriate frequency, voltage and protection settings based on its nameplate.
The published speed range is 10,000–24,000 RPM. Choose cutting tools rated for the intended speed and verify all drive parameters before operation.
The original product material states that the VFD has been programmed. Nevertheless, verify motor voltage, current, frequency, run/stop control, acceleration settings and safety functions against the supplied motor and machine before starting.
Ask About VFD and Spindle Compatibility
Yes. The contents table lists thirteen ER20 collets identified as sizes 1–13mm. Confirm the supplied size combination and collet fit if a particular shank diameter is required.
The package table lists ten drill bits identified as 0.8–3mm with 1/8-inch shanks. Request the exact assortment if it affects your application.
Yes. The kit lists two wrenches, one aviation wire and one power wire. Cable length, plug type and terminal configuration should be confirmed for the final shipment.
Yes. The contents table lists one Φ100mm clamp mount. Verify mounting-bolt pattern and clearances against your machine before ordering.
Yes. The kit includes one water pump. The published contents do not identify its working voltage or flow rating, so confirm the pump specification for the intended installation.
The standard package list states one five-meter water hose. Ensure the final routed hose length and coolant circuit match your machine layout.
A working recirculating cooling arrangement is required. The kit lists a pump and hose but does not expressly list a reservoir or chiller; confirm those components or provide a suitable cooling system.
Do not run the water-cooled spindle without the cooling flow required by the manufacturer. Check leaks, hose routing and circulation before spindle rotation.
A compatible controller may provide speed and run/stop commands to the VFD using supported terminals or signals. Verify the actual drive interfaces and controller wiring, rather than assuming plug-and-play compatibility.
A PLC may control a compatible VFD using the drive’s supported input interfaces. Confirm electrical isolation, control voltages, interlocks and parameter configuration for the chosen drive.
It can be evaluated for wood routing, MDF engraving and similar applications using properly rated cutters, suitable feed rates and a rigid machine frame.
These are published application materials. Match cutter geometry, RPM and feed rate to chip evacuation and heat control requirements.
Light-duty engraving and appropriate metal machining may be feasible with suitable cutters, feeds, machine stiffness and chip management. Confirm the intended removal rate and process before purchasing.
ER20 identifies the spindle’s collet toolholding interface. Select compatible collets and cutters for each tool-shank diameter and observe the tool’s maximum rated speed.
Ask About VFD and Spindle Compatibility
The published kit specifies ER20 collet toolholding; it does not state an automatic tool-changing mechanism. Confirm separate equipment requirements if automatic changes are needed.
The source comparison material cites runout below 0.005mm as an illustrative value. Buyers requiring a contractual tolerance should confirm the inspection location, test setup and acceptance criteria.
The product description refers to four upgraded steel bearings. Request bearing construction or drawing information if a specific arrangement is required for your machine.
An advertised indicative service-life statement is not a universal guarantee. Actual life depends on loading, speed, cooling and maintenance; ask for the applicable written warranty and service conditions.
The published FAQ describes a typical 3–7 working-day period after payment for standard kits and 10–20 days for bulk or customized production, depending on order conditions. Obtain written confirmation for the actual order.
The source FAQ states a 12-month warranty for spindle motors, VFDs and accessories. Ask for the specific exclusions, claim procedure and coverage applicable to your shipment.
The supplier offers to discuss OEM configuration, packaging, voltage, cabling and accessories. Provide technical specifications and quantities so feasibility and pricing can be confirmed.
Share the order quantity, desired motor voltage, country of destination, machine application, drive input supply, shipping requirements and any requested documentation or packaging.
No fixed MOQ is given for this kit in the supplied description. Contact Zhong Hua Jiang for quantity-specific pricing and order conditions.
A complete kit is convenient when a suitable VFD, cooling accessories and clamping hardware are not already installed. A motor-only option may suit an existing compatible machine setup.
Use the Zhong Hua Jiang contact page to submit your required 220V or 380V configuration, quantity, machine model and application so the supplier can prepare a suitable quotation.
