ZZ Slewing Bearing
Germany | Industrial Robotics (Stuttgart)
In the heart of the “Automotive Cradle,” high-speed welding lines utilize Zero-Clearance Slewing Bearings.
ZZ Slewing Bearing
Denmark | Offshore Wind (Esbjerg)
Harnessing the North Sea’s power requires massive Yaw and Pitch Bearings for 8MW+ turbines.
ZZ Slewing Bearing
Netherlands | Port Logistics (Rotterdam)
The world’s most automated port relies on Triple-Row Roller Bearings for its Ship-to-Shore (STS) cranes.
ZZ Slewing Bearing
Japan | Mobile Cranes (Yokohama)
All-terrain cranes in dense urban areas require Outer-Gear Ball Slewing Bearings.
ZZ Slewing Bearing
India | Tunnel Boring (Bengaluru)
For the Bengaluru Metro, Ø5m+ Main Bearings drive the cutter heads of TBMs (Tunnel Boring Machines).
ZZ Slewing Bearing
USA | Utility-Scale Solar (Texas)
Texas-sized solar farms utilize Single-Axis Horizontal Slewing Drives.
ZZ Slewing Bearing
Brazil | Mining Operations (Carajás)
One of the world’s largest iron ore mines uses Triple-Row Roller Slewing Bearings for its stacker-reclaimers.
ZZ Slewing Bearing
South Africa | Deep Mining (Johannesburg)
Deep-level gold mines utilize Cross-Roller Slewing Bearings for underground transfer turntables.
Powering the World: ZZ's Global Footprint
From towering construction cranes to cutting-edge renewable energy projects, ZZ Slewing Bearing’s high-precision slewing bearings are the silent force behind global industry. With a presence in over 70+ countries, we deliver uncompromising reliability to every corner of the globe.
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.