ZZ Slewing Bearing

Slewing Bearings with Seal

Slewing Bearings with Seal are slewing bearings equipped with specialized sealing systems designed to protect the internal components from contaminants like dust, moisture, and other external elements. These seals enhance the bearing’s durability and performance, especially in harsh or demanding environments.

Features:

  • Enhanced Protection: The sealing system prevents the ingress of dirt, water, and other particles, reducing wear and extending the bearing’s lifespan.
  • Customized Seal Types: Seals can be designed to suit specific applications, including single or double lip seals, labyrinth seals, or specialized sealing materials for extreme conditions.
  • Weather Resistance: Bearings with seals are suitable for outdoor applications, protecting against rain, snow, and varying weather conditions.
  • Lubrication Retention: Seals help retain lubrication within the bearing, ensuring smooth operation and reducing maintenance requirements.
  • Corrosion Resistance: Sealed bearings are often paired with corrosion-resistant materials or coatings to handle environments with exposure to moisture or chemicals.

Applications:

  • Construction Equipment: Sealed slewing bearings are commonly used in excavators, cranes, and loaders, where protection from dirt and debris is critical.
  • Marine Applications: Suitable for port machinery and offshore equipment, where bearings are exposed to saltwater and humid conditions.
  • Wind Turbines: Protects bearings from dust, moisture, and temperature fluctuations in outdoor environments.
  • Mining Equipment: Ensures reliable performance in dusty and abrasive conditions typical of mining sites.
  • Agricultural Machinery: Used in harvesters and tractors to protect against soil, water, and plant debris.
  • Robotics and Automation: Sealed bearings are used in precise and clean environments where contamination can compromise performance.

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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