78912 - Welding machine Sthor - Free user manual and instructions
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| Product Type | Welding Machine |
| Brand | Sthor |
| Model | 78912 |
| Power Supply | 230 V / 50 Hz AC |
| Welding Process | MMA (Stick) and TIG (Lift) |
| Current Range | 20-200 A |
| No-Load Voltage | 60 V |
| Duty Cycle | 60% at 160 A |
| Efficiency | 85% |
| Dimensions (L x W x H) | 400 x 200 x 300 mm |
| Weight | 8.5 kg |
| Cooling System | Forced air fan |
| Protection Rating | IP21 |
| Insulation Class | F |
| Controls | Adjustable current knob |
| Additional Functions | Hot Start, Anti-Stick, VRD |
| Included Accessories | Electrode holder, earth clamp, wire brush |
| Cable Length | 2.5 meters |
| Operating Temperature | -10°C to 40°C |
| Safety Features | Thermal overload protection, fuse |
Frequently Asked Questions - 78912 Sthor
What types of welding can I perform with the Sthor 78912?
The Sthor 78912 supports MMA (Stick) welding and TIG (Lift) welding. It is ideal for home projects, repairs, and light industrial applications.
What is the maximum welding current and duty cycle?
The maximum welding current is 200 A, and it provides a 60% duty cycle at 160 A, allowing continuous operation during most tasks.
How do I set up the machine for welding?
Connect the electrode holder to the positive terminal and the earth clamp to the negative terminal for DC welding. Adjust the current with the adjustable knob based on your material thickness.
What safety features are included?
The machine includes thermal overload protection, overcurrent protection, and a Voltage Reduction Device (VRD) to enhance operator safety.
Can I use the welding machine outdoors?
Its IP21 protection rating means it is suitable for indoor, dry environments. Avoid rain and high humidity to prevent electric shock.
What maintenance does the Sthor 78912 require?
Regularly clean the ventilation grilles to prevent dust buildup, check the cables and connections, and replace worn electrode holders or tungsten electrodes when needed.
Is it possible to weld stainless steel with this machine?
Yes, you can weld stainless steel using suitable stainless-steel electrodes or TIG setup with argon gas, as the machine provides sufficient current.
What thickness of metal can it weld?
With a 200 A maximum output, the machine can weld steel up to 8 mm in a single pass, and thicker with multiple passes.
Can I operate it with a generator?
Yes, as long as the generator provides stable 230 V AC at 50 Hz with enough rated power (at least 6 kW), the machine can operate safely.
Where can I download the user manual?
The free PDF manual is available on the official Sthor website or the included documentation page at notice-facile.com. You can also use the AI question feature for specific assistance.
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USER MANUAL 78912 Sthor
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Product information
Brand : Sthor
Model : 78912
Category : Welding machine