ZZ Slewing Bearing

Precision drive, carrying the future-ZZ high-end slewing bearing solutions

In every critical operation of industrial machinery, precision, durability and load capacity are the keys to success. As a professional slewing bearing manufacturer, ZZ is committed to providing high-performance, customised slewing bearings and vertical shaft gearing systems for customers around the world, helping your equipment to operate stably and efficiently under severe working conditions.

Why choose us?

Slewing Bearing Precision Machining

✅ Precision manufacturing, excellent quality

Adopting advanced CNC machining technology, combined with high-strength materials (e.g. 42CrMo/50Mn), ensures that the gear meshing precision is ≤0.02mm, and the load carrying capacity is increased by 30%, which meets the extreme needs of wind power, construction machinery, robotics and other fields.

✅ Full scene coverage, flexible customisation
From small automation equipment to 100-tonne heavy machinery, we provide a full range of internal gear, external gear, gearless slewing bearings, supporting non-standard dimensions, sealing structure, lubrication system customisation, to adapt to your unique working conditions.

✅ Globally Proven, Reliable Delivery
ISO 9001 certified, serving customers in 50+ countries, 10,000 hours of trouble-free operation verification, 24-hour technical response, from design to delivery, escorting your project.

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Whether you need a standard model or a complex customised solution, the [your brand name] team of engineers will provide you with a free technical evaluation and a quick quotation. Click ‘Contact Us’ to start a new era of efficient drives!

[ZZ] – The power to turn the world starts with every millimetre of precision!

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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