ZZ Slewing Bearing

Slewing drive with electric motor

A slewing drive with an electric motor is a compact system that combines a slewing bearing, a worm gear, and an electric motor to provide rotational movement and torque in various applications.

Key Features:

  • High Torque Output: Provides controlled rotation of heavy loads, handling axial, radial, and moment forces.
  • Worm Gear Mechanism: Offers a high reduction ratio for precision and self-locking ability for safety.
  • Electric Motor: AC or DC motors power the drive, with adjustable speed for precise control.
  • Compact and Integrated Design: Saves space by combining components in a single unit.
  • Durability: Sealed housing protects against dust, moisture, and harsh environments.
  • Precision and Accuracy: Minimal backlash, suitable for applications requiring accurate positioning.
  • Safety Features: Includes braking systems and overload protection for secure operation.

Common Applications:

  • Solar Trackers: Adjusting the angle of solar panels for optimal energy capture.
  • Cranes and Lifting Equipment: Rotating heavy equipment with precision.
  • Wind Turbines: Controlling the yaw motion for efficient wind capture.
  • Robotics: Enabling smooth and controlled movement in robotic arms.

Slewing drives with electric motors are versatile and reliable, making them ideal for applications that require both rotational movement and load-bearing capacity.

Frequently Asked Questions

Expert Insights and Reliable Solutions to Your Most Common Questions.

ZZ Slewing Bearing supplies a full range of slewing bearings to meet different industrial needs:

  • Single row four point contact slewing bearings Application: medium loads, precise rotation.
  • Double row ball bearings  Application: higher radial and axial loads.
  • Cross roller bearings –Application: high rigidity, suitable for robots and machining centers.
  • Three row roller bearings – Application: extreme loads in heavy equipment.
  • Ball combine roller bearings –Application:  precise rotational adjustment applications.
  • Customized bearings – tailored for specific equipment requirements.

Typical selection parameter for ZZ clients:

Load type: axial, radial, and tilting moment.

Rotation RPM: ensures long service life.

Installation space & mounting dimensions: inner/outer ring diameter, bolt circle.

Precision & rigidity requirements: critical for cranes, excavators, and robots.

ZZ engineers provide professional selection guidance according to your equipment and drawings.

ZZ Slewing Bearing selects materials for strength, wear resistance, and long-term durability:

Slewing ring: 42CrMo, 50Mn, C45N, 40CrNiMo, C48E.

Special forging spare parts: carburized/hardened steels for gear teeth (20CrMnTi, 18CrNiMo7‑6).

Corrosion resistant: SS 304, 316L, duplex stainless steel.

Surface treatments: heat treatment, quenching, carburizing, induction hardening, and surface coating(Four-Layer Packing, Strong Anti-Rust Oil, Black Oxide Treatment, Jet Black Paint Finish, Hot-Dip Galvanizing (CGL), Electro-Galvanizing (EGL), Hot-Dip Galvanizing + Paint Finish)

Correct installation with flat surfaces.

Proper lubrication using grease.

Avoid overloading or shock loads over capacity.

Monitor operating conditions regularly to prevent debris entry.

Typical factors observed by ZZ engineers:

  • Insufficient or incorrect lubrication.
  • (dust, metal particles) in raceways.
  • Rolling element or track damage.
  • Uneven mounting surfaces or misalignment.
  • Incorrect bolt torque(below grade 8.8) or preloading.

In-stock: 3–7 days.

Custom: 2–6 weeks depending on size, load, and precision.

Warranty: 1 year

Lifetime Free Spare Parts: Glue, seals, steel ball

Yes — ZZ Slewing Bearing offers:

Detailed installation manuals.

Online engineering support.

Guidance for lubrication, maintenance, and troubleshooting solution.

Full range of materials and heat treatments for various load conditions.

High precision and strict quality inspection standards.

Engineering support before and after delivery.

Customization to exact equipment requirements.

Proven performance in cranes, excavators, robotics, wind turbines, and heavy machinery etc.

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