1. Introduction
This manual provides essential information for the safe and efficient operation, installation, and maintenance of your LOCKIMELOW 1.5KW CNC Spindle Motor HTZ80X73-1.5. Please read this manual thoroughly before using the product to ensure proper function and to prevent damage or injury. Keep this manual for future reference.
2. Safety Information
WARNING: Failure to follow these safety instructions may result in serious injury or property damage.
- Always disconnect power before performing any installation, maintenance, or troubleshooting.
- Ensure proper grounding of the spindle motor and Variable Frequency Drive (VFD) to prevent electrical shock.
- Wear appropriate personal protective equipment (PPE), including safety glasses, gloves, and hearing protection, during operation.
- Do not operate the spindle motor beyond its specified voltage, current, or speed limits.
- Keep hands, clothing, and tools clear of rotating parts during operation.
- Ensure adequate ventilation to prevent overheating of the spindle and VFD.
- This equipment should only be installed and serviced by qualified personnel.
3. Package Contents
Verify that all items listed below are present and undamaged upon unpacking. If any items are missing or damaged, contact your supplier immediately.

Figure 3.1: Components of the 1.5KW Air Cooled Spindle Kit. This image displays the main spindle, a VFD, an ER11A wrench, and a set of ER11 collets. Weights for individual components are also indicated.
- 1x ER11A Wrench (Net weight: 78g)
- 7x ER11 Collets (Net weight: 60g)
- 1x 1.5KW 110V HTNC Square Air Cooled Spindle (Net weight: 3.9kg)
- 1x 1.5KW 110V YL586K Frequency Changer (VFD) (Net weight: 790g)
4. Specifications
The following table details the key technical specifications for the 1.5KW air-cooled spindle kit:
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Spindle Type | HTZ80X73-1.5 | Electric Current | 10 A |
| Power | 1.5KW | Rotational Speed | 24000 rpm |
| Voltage | 110V | Chuck Head | ER11 |
| Frequency | 400Hz | Kit Net Weight | 4.83kg |
Additional Specifications:
- Maximum Torque: 0.6Nm
- Drive: Motor
- Construction: High-strength alloy materials, sealed, dust-proof design
- Cooling: Air-cooled
5. Setup
5.1 Wiring Diagram
Correct wiring is crucial for the safe and proper operation of the spindle motor and VFD. Refer to the diagram below for connection details.

Figure 5.1: Wiring connections between the Inverter (Adaptive Frequency Converter) and the Main Spindle. The diagram illustrates the power input (N, L) to the inverter, output to the spindle (U, V, W), and ground connections.
5.2 Installation Steps
- Mounting: Securely mount the spindle motor to your CNC machine using appropriate fasteners. Ensure the mounting surface is flat and stable to minimize vibration.
- VFD Placement: Install the VFD in a well-ventilated area, away from excessive dust, moisture, and direct heat sources.
- Electrical Connections:
- Connect the main power supply (110V AC) to the input terminals (N, L) of the VFD.
- Connect the output terminals (U, V, W) of the VFD to the corresponding terminals on the spindle motor.
- Ensure all ground wires are properly connected to the designated ground terminals on both the VFD and the spindle.
- Use shielded cables for spindle connections to minimize electromagnetic interference.
- Collet Installation: Insert the desired ER11 collet into the spindle nut, then thread the nut onto the spindle shaft. Insert the cutting tool into the collet and tighten the nut with the ER11A wrench.
- Parameter Settings: Configure the VFD parameters according to the spindle specifications (e.g., maximum frequency, voltage, current, acceleration/deceleration times). Refer to your VFD's specific manual for detailed parameter setup.
6. Operating Instructions
6.1 Initial Start-up
- After completing all wiring and mounting, double-check all connections for security and correctness.
- Power on the VFD. Observe the VFD display for any error codes.
- Start the spindle at a low RPM and gradually increase the speed to the desired operating speed. Listen for unusual noises or vibrations.
6.2 Spindle Operation
- Always ensure the spindle is running at the correct speed for the material and cutting tool being used.
- Monitor the spindle for excessive heat, noise, or vibration during operation.
- Avoid sudden changes in speed or direction, as this can stress the spindle motor.
- Ensure proper chip evacuation and cooling for the cutting process to prolong tool life and spindle health.
7. Maintenance
Regular maintenance is essential to ensure the longevity and optimal performance of your spindle motor.
- Cleaning: Regularly clean the exterior of the spindle and VFD to prevent dust and debris buildup, which can impede cooling. Use compressed air to clear cooling fins.
- Collet and Nut Inspection: Periodically inspect the ER11 collets and spindle nut for wear or damage. Replace worn components to maintain tool concentricity and grip.
- Bearing Check: Listen for unusual noises from the spindle bearings. If grinding or excessive noise is detected, professional inspection and bearing replacement may be required.
- Electrical Connections: Periodically check all electrical connections for tightness and signs of corrosion.
- Air Cooling System: Ensure the air intake and exhaust vents on the spindle are clear and unobstructed for efficient heat dissipation.
8. Troubleshooting
This section provides solutions to common issues you might encounter. For problems not listed here, contact technical support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Spindle does not start | No power to VFD; Incorrect VFD parameters; Loose wiring connections | Check power supply; Verify VFD settings; Inspect and tighten all wiring |
| Excessive vibration or noise | Unbalanced tool; Worn bearings; Loose mounting; Incorrect collet installation | Balance tool or replace; Inspect bearings; Tighten mounting bolts; Reinstall collet and tool correctly |
| Spindle overheating | Blocked air vents; Overload; High ambient temperature | Clear vents; Reduce load or operating time; Ensure adequate ventilation in work area |
| VFD displays error code | Specific VFD fault (e.g., overcurrent, overvoltage) | Refer to your VFD's manual for specific error code meanings and troubleshooting steps |
9. Warranty and Support
This LOCKIMELOW 1.5KW CNC Spindle Motor is designed for durability and performance. For specific warranty terms and conditions, please refer to the documentation provided at the time of purchase or contact your vendor directly.
For technical assistance, troubleshooting beyond this manual, or spare parts inquiries, please contact LOCKIMELOW customer support or your authorized dealer. When contacting support, please have your product model number (HTZ80X73-1.5) and purchase information readily available.