XR/JXR Cross Tapered Roller Bearings

Design Principles: The 90° orthogonal crossed arrangement of tapered rollers optimizes the cone angle and contact line length, forming a symmetrical line-contact load-bearing structure that evenly distributes radial, axial, and moment heavy loads to each roller. The line-contact design increases load-bearing density by more than 60% compared with cylindrical roller bearings, avoiding local overload under heavy loads. The integral inner and outer ring structure reduces assembly cumulative errors, and the integrated shoulder provides a precise positioning reference. Combined with the self-centering characteristics of tapered rollers, it ensures coaxiality and rotational stability under heavy loads; the greasing hole design guarantees uniform lubrication and extends service life. Performance Features: Ultra-High Rigidity & Heavy Load: Line-contact load-bearing + integral structure, rigidity increased by more than 50% compared with conventional crossed cylindrical roller bearings, maximum axial bearing capacity up to 800 KN, maximum radial bearing capacity up to 650 KN, adapting to ultra-heavy composite loads. Precise Positioning Stability: P2-class micron-level rotational accuracy, combined with the line-contact positioning characteristics of tapered rollers, repeat positioning error ≤0.002 mm, meeting the positioning requirements of heavy-duty precision equipment. Impact Resistance & Wear Resistance: GCr15SiMn material with heavy-load reinforced heat treatment, precision grinding of roller surfaces (Ra≤0.05μm), significantly improved impact resistance and wear resistance, adapting to complex heavy-load working conditions. Strong Environmental Adaptability: Multiple sealing options + dedicated lubrication solutions, compatible with various harsh environments such as high temperature, dusty, and humid conditions, service life extended by 40% compared with ordinary bearings. Customization Options: Supports non-standard size customization, tapered roller angle (15°-25°) customization, mounting hole and shoulder specification customization, corrosion-resistant material (SUS440C), special lubrication solutions for ultra-high/low temperature, and labyrinth seal enhancement design.

Working Principle Roller Arrangement and Load Distribution: The tapered rollers are arranged in a 90° orthogonal cross pattern, forming a symmetrical line contact structure. Utilizing the conical angle characteristics of the tapered rollers, radial, axial, and moment loads are evenly transmitted to the raceway through line contact, resulting in a higher load-carrying density compared to point or surface contact. Under heavy load conditions, the symmetrically distributed rollers effectively balance load stress, preventing localized overload. Moment loads are efficiently transmitted through diagonal rollers, further enhancing heavy-load carrying efficiency and structural rigidity. Lubrication and Sealing: - Sealing Protection: Contact seals (UU/U) or labyrinth seals (ZZ) effectively prevent the ingress of dust, liquids, and impurities, suitable for heavy-duty and complex environments; the open design meets the lubrication replenishment needs of clean, heavy-duty applications, ensuring uniform lubrication. - Thermal Management: Precision polishing of the tapered roller end faces and a low-friction cage design reduce friction loss, effectively controlling working temperature rise (typical temperature rise ≤18°C); combined with the high-temperature stability of the heavy-duty lubricant and the thermal conductivity of the integral structure, it ensures the thermal stability of precision equipment under high loads. Installation and Adaptability: The integral structure is compatible with standard mounting holes and can be directly bolted, simplifying the assembly process of heavy equipment; it is compatible with standard interference fits (shaft h6/housing bore H7), meeting the assembly tolerance requirements of most heavy industrial equipment. The integrated shoulder provides a precise positioning reference, ensuring installation accuracy and operational stability under heavy loads.