For rotary mechanisms of construction machinery, automation equipment, mining machinery and precision inspection platforms, cross-roller bearings and four-point contact ball slewing bearings are two mainstream slewing solutions. Improper selection will directly affect equipment loading capacity, precision and service life.
Four-Point Contact Ball Slewing Bearing
It uses steel balls as rolling elements. With four-point contact design, a single bearing can bear axial load, radial load and overturning moment simultaneously.
Advantages
1.Excellent shock resistance and heavy-load capacity for harsh working conditions with vibration and impact.
2.Multiple gear options: internal gear, external gear and gear-free types. Mature technology for large size non-standard production.
3.Robust structure and low maintenance, cost-effective. Typical applications: construction machinery, mining equipment, waste-to-energy plants, large rotary platforms.
Cross-Roller Bearing
Rollers are arranged crosswise at 90°, separated by retainers.
Advantages
1.Ultra-high rigidity and rotational accuracy, available in P4 / P5 precision grades.
2.Slim and compact structure to save installation space.
3.Good positioning performance with adjustable clearance, capable of multi direction combined loads. Typical applications: robot joints, CNC rotary tables, radar equipment, precision testing instruments and special precision machinery.
Key Comparison
1.Precision: Cross-roller bearings achieve higher precision more easily. High-precision four-point contact ball bearings are also available but at higher cost.
2.Rigidity & Shock resistance: Four-point contact ball type performs better under impact and vibration. Cross-roller owns superior rigidity yet is more sensitive to heavy shock.
3.Dimension: Cross-roller bearings are thinner under equivalent load. Four point contact ball bearings cover a much wider range of large diameters.
4.Cost: Large non-standard cross-roller bearings have higher processing difficulty and cost. Four-point contact ball slewing rings feature better cost-performance for large-size projects.
Our factory provides custom service for both product lines. We manufacture large-size non-standard four-point contact ball slewing bearings as well as large-size high-precision cross-roller bearings. Customization is available against customer drawings. Strict control covers raceway heat treatment, grinding accuracy, gear machining and clearance adjustment. We offer professional technical support for global customers.
