What Power Source Is Required for Chinese Used Pipe Threading Machines?

Introduction

When purchasing a used pipe threading lathe from China, one of the key technical questions you’ll face is: What power source does it require? Ensuring that the machine’s electrical and power-requirements match your workshop’s supply is critical to safe, efficient, and trouble-free operation. This applies whether you’re looking at a conventional manual lathe, a heavy-duty pipe threading machine, or a CNC machining center designed for large-diameter pipe threads. In this article we’ll explore typical motors and voltages, three-phase vs single-phase supply, how power requirements scale with machine size, and practical steps to verify compatibility with your facility.

Typical Motor Power Ratings and Voltage Requirements

Chinese used pipe threading machines span a wide range of sizes—from light-duty models to heavy oil-field “big-bore” units. Correspondingly, the motor power and voltage requirements vary significantly.

For example:

• A manual pipe-threading lathe for smaller pipes might have a spindle motor power of around 11 kW.

• Larger heavy-duty machines for large diameter pipe threading might require main motors of 22 kW, 30 kW, or higher. Voltage ratings frequently show three-phase supply e.g., 380V / 50Hz, and some machines list compatibility with 220V/380V or even 415V

In short: the power traction required depends heavily on machine size, bore capacity, and duty cycle. A used machine with three-phase 380V is common for industrial-grade pipe threading lathes.

Three-Phase vs Single-Phase Supply

Most industrial Chinese used pipe threading lathes demand three-phase power. Single-phase supply is almost invariably insufficient for heavy motors due to current draw, imbalance, and lack of torque stability.

Key points:

• A machine rated for 380V three‐phase will likely not perform properly on a single‐phase 220V supply unless modified or equipped with a phase converter or VFD (Variable Frequency Drive).

• Many Chinese spec sheets specify “Three Phase 400 V” or similar. For example: a heavy-duty pipe threading machine lists “Main Motor : 22 KW; Connecting Voltage : Three Phase 400V”. 

• Before purchase, verify your local workshop power supply: is it 380V/50Hz three-phase, or another standard (e.g., 400V/50Hz, 480V/60Hz)? If your building supply is different, you may need step-up/down transformers or phase converters.

Matching Machine Rating to Local Power Infrastructure

Here are practical factors to check

1. Phase: Confirm that the supply is three-phase. If your facility only has single-phase, a large machine may draw too much current or trip breakers frequently.

2. Motor Power (kW) and Electrical Load: Larger machines (22 kW, 30 kW, etc) require significant load; ensure your building wiring, circuit breaker and supply lines can handle the load.

3. Startup Current & Drive Type: High power motors may draw 5-6 times rated current at startup; ensure you have the right electrical infrastructure or use soft-start/VFD.

4. Machine Documentation: Ask for the machine nameplate, rating plate, and wiring diagram to confirm what the machine is configured for (or whether it’s been modified).

Impact of Power Source on Machine Performance

Using the wrong power source or poorly matched supply can lead to many issues:

• Reduced torque and lower threading performance — machine might bog down on large pipes.

• Overheating of motor or electrical components if voltage is too low.

• Increased maintenance cost and premature failure of components (gearboxes, bearings) due to improper power supply.

• Safety hazards – electrical imbalance or insufficient supply may cause tripping, sparks, or damage.

Conversely, a correctly matched power supply ensures:

• Smooth operation and full rated speed/torque.

• Better machining results and consistent threading quality.

• Lower operating cost and fewer breakdowns.

Practical Checklist Before Purchase

Before finalizing a used Chinese pipe threading lathe, verify:

• What is the rated voltage and phase of the machine?

• Does the motor’s kW rating align with your workshop’s capacity?

• Are your local power lines capable of serving three-phase 380‐400V (or whatever the machine needs)?

• Are the circuit breaker, wiring gauge, and supply capacity adequate for the motor load?

• Does the machine come with documentation (nameplate, wiring diagram, motor specs)?

• If the machine is configured for a different voltage standard, does it include a transformer or is it convertible?

• On arrival, perform a power‐up test, monitor current draw, motor temperature, and check that the drive system functions properly.

Conclusion

The power source required for a Chinese used pipe threading machine is definitely a critical part of the purchase decision. These machines often require three-phase power at voltages such as 380V/50Hz and motor powers ranging from ~11 kW for smaller units to 30 kW or more for heavy-duty models. Ensuring compatibility with your workshop’s electrical infrastructure—voltage, phase, wiring capacity—is essential to achieve full performance, longevity, and safety.

If you’re based in Pakistan or a similar location, checking local voltage standards, wiring infrastructure, and the machine’s rating plate is imperative before committing. With proper matching of power source and machine, you can confidently invest in a Chinese used pipe threading lathe and expect strong performance for years to come.At Mudar-M Metalworking Machine Tools Trading, we take pride in sourcing top-tier Chinese Used metalworking machines, including heavy-duty lathes, CNC milling machines, and automatic machining centers. With decades of expertise, we serve industrial clients from Poland to Bulgaria and beyond. Our inventory includes everything from medium-duty lathes to CNC milling centers, all selected for durability and performance.

At Mudar-M Metalworking Machine Tools Trading, we are your trusted partner for high-quality Chinese used metalworking equipment. Our extensive experience and commitment to quality enable us to deliver premium machine tools that enhance industrial operations worldwide. Whether you need Chinese Used CNC lathes, drilling machines, gear hobbers, presses, milling machines, or grinding machines, we provide personalized solutions for every client.

To ensure seamless communication, we offer multilingual services for clients speaking Polish, Bulgarian, Italian, German, English, French, Spanish, Romanian, Ukrainian, and more.

Visit our website to learn more about our extensive offerings, or contact us for personalized service

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