The double-row ball slewing bearing has passed testing and acceptance.

Project Background: Why did the customer choose double-row ball slewing bearings?

In heavy equipment, construction machinery, and large-scale rotating structure applications, the stability and lifespan of the slewing system often determine the overall performance limits of the machine. The customer in this case is an overseas complete equipment manufacturer whose equipment operates under medium-to-high load, low-speed continuous rotation conditions. This places the following core requirements on the slewing bearing:

Simultaneous handling of large axial loads and overturning moments

Smooth operation and minimal torque fluctuations during rotation

Strict requirements for reliability, test data, and traceability due to equipment export

Standard bearing solutions are not directly suitable and require matching to the overall machine structure

After multiple rounds of technical evaluation, the customer explicitly requested the use of double-row ball slewing bearings as the core rotating component, but with the condition that it must pass complete and verifiable slewing bearing testing and final acceptance.

Why is slewing bearing testing critical for this project?

When purchasing slewing bearings, customers often consider critical issues such as operating conditions, performance and lifespan of the slewing bearing, and cost-effectiveness.

Firstly, the operating conditions are complex, requiring high safety redundancy.

The equipment experiences uneven loads and periodic impacts during operation. If the raceway design or heat treatment is improper, early fatigue or abnormal wear can easily occur.

Secondly, the double-row ball structure requires higher manufacturing consistency.

Compared to single-row ball slewing bearing structures, double-row ball slewing bearings are more sensitive to raceway accuracy, ball diameter matching, and cage structure.  If manufacturing deviations accumulate, operational problems will be amplified. This requires suppliers to strictly control the manufacturing process.

Thirdly, the customer requires traceable production data.

During the acceptance phase, the customer explicitly requires complete slewing bearing testing records, test curves, and stability assessment results. LTZC bearings are manufactured entirely in-house, providing traceable production data.

How does LTZC optimize the double-row ball slewing bearing design?

As a slewing bearing supplier long focused on large and non-standard rotary products, LTZC, through extensive technical communication with its customers, did not simply apply off-the-shelf solutions. Instead, it provided customized bearing services based on the overall operating conditions of the machinery.

1. Optimized Structure and Load Matching

Based on the load spectrum and installation conditions provided by the customer, the LTZC technical team recalculated the double-row ball arrangement of the slewing ring, rationally distributing the axial force and overturning moment between the upper and lower raceways to ensure a more balanced overall stress distribution.

2. Targeted Selection of Raceways and Material Processes

To meet the requirements for long-term stable operation, LTZC adopted higher standards in raceway heat treatment depth, hardness gradient, and surface precision control, avoiding common surface fatigue and pitting problems.

3. Cage and Assembly Control

For the double-row ball structure, LTZC optimized the cage design and implemented multiple inspection procedures during the assembly phase to ensure consistent ball distribution and proper pre-tensioning, thereby reducing the risk of operational fluctuations from the source.

Contact LTZC for customized bearing solutions

What testing proves the reliability of LTZC slewing rings?

After manufacturing, LTZC did not directly deliver the products but instead conducted systematic slewing bearing testing strictly according to project requirements. The testing process was authentic and traceable.

No-load running test: Verifies rotational smoothness and basic assembly accuracy.

Load test: Simulates axial load and overturning moment under actual working conditions.

Continuous running test: Long-term low-speed rotation, monitoring temperature rise and torque changes.

Stability observation: Checks for abnormal noise, jamming, or vibration.

Throughout the entire testing cycle, the bearing operation was stable, temperature rise was controlled reasonably, the torque curve was smooth, and all key indicators met or exceeded design expectations.

Finally, LTZC submitted a complete test report and data records to the customer, successfully passing the testing and acceptance.

Why do customers recognize LTZC as a long-term partner for slewing bearing supply?

Through this project, the customer not only received a set of double-row ball slewing bearings that passed testing and acceptance, but more importantly, established trust in LTZC's overall capabilities.

Key points of customer feedback include:

LTZC possesses a complete closed-loop capability from design to testing.

The slewing bearing testing process is professional, transparent, and the data is reliable.

Deep understanding of non-standard projects and efficient communication.

Stable product delivery, meeting the long-term reliability requirements of export equipment.

This is precisely the key to LTZC's continued development in the international market.

Contact LTZC for factory price