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FAQs

What affects the service life of a planetary gearbox?

Key factors include load distribution, lubrication quality, ambient temperature, motor inertia, and installation alignment. Proper sizing—especially matching motor inertia with reducer inertia—is essential for long lifetime and stable operation.

Why does gearbox stiffness matter in servo applications?

High torsional stiffness ensures faster response, better positioning accuracy, and improved dynamic performance. Low-stiffness reducers may cause vibration, overshoot, or inconsistent repeatability in high-precision movements.

Can planetary gearboxes handle high-speed input?

Yes, planetary reducers support high input speeds, but the allowable limit depends on size, gear material, lubrication, and heat dissipation. NUODUN planetary gearboxes are designed to handle high-speed servo and stepper motor applications.

How do I choose the correct backlash level?

Backlash selection depends on application requirements:

  • ≤5 arcmin for robotics, AGV, CNC, and high-precision automation

  • 10–15 arcmin for conveyors, packaging, and general industrial machinery
    NUODUN provides multiple backlash levels to match accuracy and budget needs.

What makes planetary gearboxes different from other reducer types?

Planetary gearboxes offer high torque density, low backlash, compact size, and excellent precision. Their symmetrical load distribution allows higher transmission efficiency and longer service life compared to worm or spur gear reducers.

How do I extend the lifetime of my gearbox?

Ensure proper alignment between motor and reducer, avoid overload or shock loading, maintain clean lubrication, and ensure the mounting surface is rigid. Running a gearbox under excessive load or poor alignment conditions significantly shortens lifespan.

What causes abnormal noise inside a gearbox?

Common causes include gear wear, insufficient lubrication, misalignment, or external shock loads. If abnormal noise increases over time, stop operation immediately and inspect for worn bearings or damaged teeth.

Do NUODUN gearboxes require lubrication changes?

Most NUODUN planetary and helical gearboxes use long-life synthetic grease and are maintenance-free. For worm gear reducers or high-duty applications, periodic lubrication checks may be necessary. Always follow the lubrication type specified in the product manual.

How often should a gearbox be inspected or maintained?

Routine inspection every 3–6 months is recommended depending on duty cycle. Check lubrication condition, shaft seals, mounting bolts, and noise level. Heavy-load or continuous-duty applications may require more frequent checks.

Why is my motor running but with very low torque or slow acceleration?

Low torque is often caused by a weak capacitor, low voltage, worn bearings, or insufficient lubrication in the gearbox. For AC induction motors, voltage drops significantly reduce torque. Measure input voltage and verify the capacitor meets the required specification.

What should I check if the motor suddenly stops during operation?

Check for overload protection tripping, capacitor failure, mechanical jamming in the driven equipment, or overheating protection activation. Disconnect power, let the motor cool, and inspect the load for any abnormal binding or increased torque demand.

Why does the motor produce abnormal noise or vibration?

Possible reasons include misalignment, damaged bearings, loose mounting screws, rotor imbalance, or gear damage (for gear motors). Check for mechanical interference, tighten mounting hardware, and rotate the motor shaft manually to verify smoothness.