1. Introduction
Thank you for choosing the HITBOX HBM145 4-in-1 Multi-process Welder. This versatile machine supports MMA (Stick), Gasless MIG, Lift TIG, and Spool Gun welding, making it suitable for a wide range of welding tasks. This manual provides essential information for safe and effective operation, setup, and maintenance of your welder.

2. Safety Information
Always prioritize safety when operating welding equipment. Failure to follow safety precautions can result in serious injury or death.
- Wear appropriate personal protective equipment (PPE), including a welding helmet, gloves, protective clothing, and safety shoes.
- Ensure adequate ventilation to avoid inhaling welding fumes.
- Keep a fire extinguisher nearby.
- Do not operate the welder in damp or wet conditions.
- Ensure the workpiece is properly grounded.
- Disconnect power before performing any maintenance or changing accessories.
- Avoid touching live electrical parts.
- Keep children and unauthorized personnel away from the welding area.
3. Product Overview
3.1 Main Components

- Digital LCD Screen: Displays welding parameters and settings.
- Function Button: Selects welding mode (MMA/ARC, TIG, MIG).
- "+" Pole: Positive output terminal.
- "-" Pole: Negative output terminal.
- MIG Gun Interface: Connection point for the MIG torch.
- 4-Pin Socket: For connecting accessories like a Spool Gun.
- Mode Knob: Adjusts welding parameters (e.g., amperage, wire speed).
- SET Button: Confirms selections or enters sub-menus.
3.2 Key Features
- 4-in-1 Multi-Process: Supports Gasless MIG, MMA (Stick), Lift TIG, and Spool Gun welding.
- Large LED Display: Provides clear visibility of welding parameters.
- Lightweight and Portable: Designed for easy transport and maneuverability.
- Waterproof Switch: Enhanced durability and safety.
- Premium MIG Gun: Built to withstand 150A for long lifespan.
- Advanced Protection: Includes Overvoltage, Overcurrent, Overheating, and Overload Protection.


4. Specifications
| Attribute | Value |
|---|---|
| Model Number | HBM145 |
| Is Smart Device | Yes |
| Dimensions | 41x39x23cm |
| Weight | 7.6kg (9.63 lbs) |
| Certification | CE |
| Use | MMA/MIG/LIFT TIG |
| Origin | Mainland China |

5. Setup and Installation
Refer to the product demonstration video for visual guidance on connection steps.
5.1 Power Connection
- Ensure the welder's power switch is in the OFF position.
- Connect the power cable to the welder's input port (AC110V/220V).
- Plug the power cable into a suitable power outlet.
- Turn the power switch to the ON position. The digital LCD screen will illuminate.
5.2 MMA/ARC Welding Setup
- Select MMA/ARC mode using the Function button.
- Connect the electrode holder cable to the "-" pole terminal.
- Connect the ground clamp cable to the "+" pole terminal.
- Securely attach the ground clamp to the workpiece.
- Insert the welding electrode into the electrode holder.
5.3 Lift TIG Welding Setup
- Select TIG mode using the Function button.
- Connect the TIG torch cable to the "-" pole terminal.
- Connect the ground clamp cable to the "+" pole terminal.
- Securely attach the ground clamp to the workpiece.
- Connect the gas hose from the TIG torch to your gas supply (e.g., Argon).
5.4 Gasless MIG Welding Setup
- Select MIG mode using the Function button.
- Connect the MIG torch cable to the "+" pole terminal.
- Connect the ground clamp cable to the "-" pole terminal.
- Securely attach the ground clamp to the workpiece.
- Wire Spool Installation:
- Open the side panel of the welder.
- Place the wire spool onto the spindle.
- Feed the welding wire through the wire feeder mechanism.
- Close the side panel.
5.5 Spool Gun Setup
- Select Spool Gun mode (MIG mode with Spool Gun selected).
- Connect the Spool Gun cable to the "+" pole terminal.
- Connect the Spool Gun's control cable to the 4-Pin Socket.
- Install the wire spool directly into the Spool Gun.
- Note: Spool Gun welding is for gasless welding only; aluminum welding is excluded.
6. Operating Instructions
6.1 Mode Selection and Parameter Adjustment
- After connecting the appropriate accessories for your desired welding process, turn on the welder.
- Press the Function button to cycle through MMA/ARC, TIG, and MIG modes.
- Once the desired mode is selected, use the Mode Knob to adjust the primary welding parameter (e.g., Amperage for MMA/TIG, Wire Speed for MIG).
- Press the SET button to access additional parameters like Hot Start, Arc Force, Antisticking, and VRD (Voltage Reduction Device) for MMA, or Flux wire size (0.8mm/1.0mm) for MIG.
- Rotate the Mode Knob to adjust these secondary parameters.
- Confirm settings by pressing the SET button again or waiting for the display to return to the main parameter.
6.2 Welding Techniques
Proper welding technique varies significantly between processes and materials. It is recommended to practice on scrap material before working on critical projects. Always maintain a stable arc, consistent travel speed, and appropriate electrode/torch angle.
- MMA/ARC: Maintain a short arc length, consistent travel speed, and proper electrode angle.
- Lift TIG: Initiate the arc by gently touching the tungsten electrode to the workpiece and lifting slightly. Maintain a consistent arc length and feed filler rod manually if required.
- MIG (Gasless): Maintain a consistent stick-out and travel speed. The machine's synergic control simplifies settings.
7. Maintenance
Regular maintenance ensures the longevity and optimal performance of your welder.
- Cleaning: Regularly clean the internal components, especially the fan and heat sinks, to prevent dust buildup. Use compressed air.
- Cable Inspection: Inspect all cables, torches, and clamps for damage (cuts, fraying, loose connections) before each use. Replace damaged components immediately.
- Wire Feeder: Keep the wire feeder mechanism clean and free of debris. Ensure the drive rollers are correctly tensioned for smooth wire feeding.
- Electrode Holder/TIG Torch: Clean the electrode holder jaws and TIG torch consumables (collet, collet body, nozzle, tungsten) as needed.
- Storage: Store the welder in a dry, clean environment away from excessive dust and moisture.
8. Troubleshooting
If you encounter issues, consult this section before contacting support.
- No Power: Check the power cable connection, wall outlet, and the welder's power switch. Ensure the circuit breaker hasn't tripped.
- No Arc: Verify all connections (electrode holder/torch, ground clamp) are secure. Check welding parameters and ensure the workpiece is clean and free of rust or paint.
- Poor Weld Quality: Adjust amperage/wire speed, check electrode/wire type and size, ensure proper gas flow (for TIG/Gas MIG), and clean the workpiece.
- Overheat Protection Activated: If the welder stops and an overheat indicator lights up, allow the machine to cool down. Ensure proper ventilation and avoid exceeding the duty cycle.
9. User Tips
- Aluminum Welding: While the HBM145 is a multi-process welder, note that Spool Gun welding with this model is specifically for gasless applications and excludes aluminum welding. For aluminum, a dedicated AC TIG or MIG setup with shielding gas is typically required.
- Power Source: The machine operates on AC110V/220V. It is not battery operated.
- Beginner-Friendly: The synergic control in MIG mode simplifies parameter setup, making it easier for beginners to achieve good welds.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the contact information provided by your retailer or the manufacturer's official website. Keep your purchase receipt as proof of purchase.





