We strictly adhere to the ISO 9001 and ISO/TS 16949 quality management systems, implementing full-process traceability control from raw material intake to finished product delivery. Every slewing bearing undergoes 100% flaw detection, hardness gradient testing, and rotational accuracy verification to ensure stable lifespan and reliable performance under harsh conditions such as heavy loads, off-center loads, and impacts. By using high-purity bearing steel and precision heat treatment processes, our product failure rate is more than 40% lower than the industry average.
Rock-Solid Performance
Leveraging our experienced engineering team and modular design platform, we can quickly provide non-standard slewing bearing solutions tailored to our clients' specific load curves, installation interfaces, sealing levels, and corrosion protection requirements. Whether it's single-row, double-row, or triple-row roller bearings, or lightweight, thin-film, or high-temperature resistant special structures, we can complete drawing confirmation and process finalization within 15 working days. Our customized services have helped over 20 industries, including construction machinery, wind power, and robotic turntables, achieve differentiated equipment upgrades.
Precise Customization to Your Needs
The factory is equipped with CNC vertical grinding machines, gantry milling centers, and automated quenching lines, supporting parallel production of small batches and multiple varieties. Standard product inventory ensures 72-hour lightning-fast delivery, while urgent orders can utilize a green channel of "4-hour response - 48-hour sampling - 7-day batch delivery." Leveraging a digital scheduling system, we have achieved full visibility from order to shipment, significantly reducing the risk of production stoppages due to material shortages for our customers.
Flexible and Fast-Track Delivery
We provide one-stop technical services, from selection calculations and installation guidance to operational monitoring. Each product comes with a unique QR code for tracing manufacturing parameters and quality inspection reports. Our after-sales team promises to respond to troubleshooting needs within 24 hours and can provide surveying, refurbishment, and upgrade/replacement solutions for older equipment. Furthermore, we regularly conduct customer operation training and offer lifespan prediction tools, truly ensuring customers can "buy with confidence and use with peace of mind.
Worry-Free Service
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.