1. Introduction
This manual provides essential instructions for the safe operation, setup, maintenance, and troubleshooting of your Grizzly Industrial G4015Z Combo Lathe/Mill. Please read this manual thoroughly before operating the machine to ensure proper usage and to prevent injury or damage.
The Grizzly G4015Z is a versatile machine designed for both turning (lathe) and milling operations, suitable for various metalworking tasks. Understanding its components and functions is crucial for effective and safe use.
2. Safety Instructions
Operating any power tool, especially a combo lathe/mill, requires strict adherence to safety protocols. Failure to follow these instructions can result in serious injury or death.
- Read the Entire Manual: Understand all warnings, instructions, and procedures before operating the machine.
- Wear Eye Protection: Always wear ANSI-approved safety glasses or a face shield.
- Wear Appropriate Clothing: Avoid loose clothing, gloves, ties, rings, bracelets, and other jewelry that can get caught in moving parts. Tie back long hair.
- Maintain a Clean Work Area: Keep the work area free of clutter, oil, and debris. Ensure adequate lighting.
- Ensure Proper Electrical Connection: Connect the machine to a properly grounded 110V electrical outlet. Do not bypass safety switches.
- Secure Workpiece: Always ensure the workpiece is securely clamped in the chuck or vise before starting any operation.
- Use Correct Tools: Use only sharp, correctly sized, and appropriate cutting tools for the material being worked.
- Never Leave Machine Unattended: Turn off the machine and disconnect power before leaving the work area.
- Emergency Stop: Familiarize yourself with the location and operation of the emergency stop button.
- Machine Stability: Ensure the machine is securely mounted to a stable workbench or stand to prevent tipping or movement during operation.
3. Setup and Installation
Proper setup is critical for the performance and safety of your G4015Z Combo Lathe/Mill.
3.1 Unpacking and Inspection
Carefully unpack the machine and all accessories. Inspect for any shipping damage. Report any damage to the carrier and Grizzly Industrial immediately. Retain all packaging materials for potential returns.
3.2 Location and Mounting
Select a location with sufficient space around the machine for safe operation and maintenance. The machine weighs approximately 470 pounds, so a sturdy, level workbench or stand is essential. Secure the machine to the surface using appropriate fasteners to prevent movement.
Ensure the area has adequate lighting and ventilation. Avoid locations with excessive dust, humidity, or extreme temperatures.
3.3 Electrical Connection
The G4015Z operates on 110 Volts and draws 957 watts (0.75 HP motor). Connect the machine to a dedicated, grounded 110V circuit with an appropriate circuit breaker. Do not use extension cords unless absolutely necessary, and if used, ensure they are heavy-duty and rated for the machine's power requirements.

Figure 1: Overall view of the Grizzly G4015Z Combo Lathe/Mill, showing its combined lathe bed and milling head.
4. Operating Instructions
This section outlines the basic operational procedures for both the lathe and mill functions of the G4015Z.
4.1 Lathe Operations
The lathe function is used for turning, facing, drilling, and threading cylindrical workpieces.
- Workpiece Mounting: Securely mount the workpiece in the 3-jaw chuck or between centers. Ensure it runs true.
- Tool Selection and Setup: Select the appropriate cutting tool for the material and operation. Mount the tool in the tool post, ensuring it is centered to the workpiece.
- Speed Selection: Adjust the spindle speed according to the material and cutting tool. Refer to the speed chart (if provided on the machine or in a separate document).
- Feed Engagement: Engage the appropriate feed rate for automatic cutting, or use manual feed for precise control.
- Cutting: Slowly bring the cutting tool into contact with the workpiece. Monitor the cut and adjust as necessary.

Figure 2: Close-up of the lathe carriage, cross-slide, and tool post, showing the controls for precise material removal.
4.2 Milling Operations
The milling function allows for drilling, end milling, and face milling operations on flat or irregularly shaped workpieces.
- Workpiece Clamping: Securely clamp the workpiece to the milling table using a vise or T-slot clamps.
- Cutter Installation: Install the appropriate end mill or drill bit into the milling head's chuck or collet.
- Head Adjustment: Adjust the milling head height and angle as required for the operation.
- Speed Selection: Set the spindle speed based on the cutter diameter and workpiece material.
- Milling: Use the X, Y, and Z axis handwheels to position the workpiece and feed the cutter. Take light cuts to avoid overloading the machine.

Figure 3: Detailed view of the milling head, showing the quill feed handles and depth adjustment mechanism.

Figure 4: Top view of the milling head, illustrating the belt drive system for changing spindle speeds.
5. Maintenance
Regular maintenance ensures the longevity and optimal performance of your G4015Z.
- Cleaning: After each use, clean the machine thoroughly, removing chips, dust, and coolant residue. Use a brush or shop vacuum; avoid compressed air as it can force debris into bearings.
- Lubrication: Regularly lubricate all moving parts, including lead screws, ways, and gears, according to the lubrication points indicated in the machine's specific diagram (refer to the full manual for detailed points). Use recommended machine oil or grease.
- Belt Tension: Check and adjust the tension of drive belts periodically. Loose belts can cause slippage and loss of power.
- Adjustments: Periodically check for and adjust any play or backlash in the lead screws, gibs, and bearings.
- Electrical Inspection: Inspect electrical cords and connections for damage. Ensure all safety switches are functioning correctly.
6. Troubleshooting
This section provides solutions to common operational issues. For complex problems, contact Grizzly Industrial technical support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Machine does not start | No power, emergency stop engaged, faulty switch | Check power supply, reset emergency stop, inspect wiring. |
| Excessive vibration/noise | Loose mounting, unbalanced workpiece, dull cutting tool, worn bearings | Secure machine, balance workpiece, sharpen/replace tool, inspect bearings. |
| Poor surface finish | Dull tool, incorrect speed/feed, machine chatter, excessive tool overhang | Sharpen tool, adjust speed/feed, reduce tool overhang, check machine rigidity. |
| Milling head loses rigidity | Loose gibs, worn components, quill extended too far | Adjust gibs, inspect for wear, minimize quill extension. |
7. Specifications
Key technical specifications for the Grizzly Industrial G4015Z Combo Lathe/Mill:
- Model: G4015Z
- Brand: Grizzly Industrial
- Motor: 3/4 HP
- Voltage: 110 Volts
- Wattage: 957 watts
- Item Weight: 470 pounds
- Product Dimensions: 23 x 41 x 39 inches (Length x Width x Height)
- Global Trade Identification Number (GTIN): 00690550740152
- UPC: 690550740152
- Included Components: Tools (as supplied by manufacturer)
8. Warranty and Support
For warranty information, technical assistance, or to order replacement parts, please contact Grizzly Industrial directly. Refer to your purchase documentation or the official Grizzly Industrial website for the most current warranty terms and contact details.
Grizzly Industrial Contact Information:
- Website: www.grizzly.com
- Customer Service: Refer to the website for current phone numbers and email contacts.





