1. Core Advantages
Heavy-Duty Combined Load Capacity: The double rows of spherical rollers cooperate with the spherical raceway of the outer ring, enabling it to bear extremely high radial loads, as well as bidirectional axial loads and overturning moments. Its rated dynamic load is much higher than that of single-row
Cylindrical Roller Bearings.
Wide-Range Self-Aligning: The outer ring raceway is spherical, allowing a deviation of 2°~3° between the shaft and the
Bearing housing. It can compensate for installation centering errors and shaft deflection deformation, adapting to harsh working conditions.
Impact Resistance and Wear Resistance: The drum-shaped design of the rollers disperses stress. Combined with high-hardness materials, it has strong impact resistance, and its service life is more than 50% longer than ordinary bearings under dusty and vibrating working conditions.
2. Key Features
Structure: Composed of an outer ring (with spherical raceway), inner ring, double rows of spherical rollers, and a two-piece cage. Most are open-type, and some are equipped with dust covers.
Rollers: Drum-shaped spherical design, with a diameter of 6-35mm, hardness of HRC 60-65, and surface roughness of Ra ≤ 0.08μm.
Precision: Regular grades are P0/P6, while heavy-duty models are mainly P0. Radial clearance can be selected from Class C3-C5 (suitable for heavy loads).
3. Core Manufacturing Processes
Rollers: Bearing steel (SUJ2) undergoes cold heading → quenching → spherical
Grinding → superfinishing, with a sphericity error of ≤ 0.003mm.
Rings: The outer ring goes through
Forging →
Turning → heat treatment → spherical raceway grinding; the inner ring’s double raceways are processed synchronously, with parallelism of ≤ 0.004mm.
Assembly: Roller sorting → two-piece cage assembly → self-aligning angle testing to ensure deviation compensation performance.
4. Usage Method
Installation: The inner ring is hot-fitted (90-110℃), and the outer ring adopts a transition fit (housing bore H7). Check the self-aligning flexibility after installation.
Lubrication: Open-type models are filled with extreme-pressure lithium-based grease (filling amount 2/3). Grease is replenished every 1000-2000 hours under dusty working conditions, and oil bath lubrication is avoided.
5. Application Scope
Covers mining ball mills, metallurgical rolling mills, paper machine drying cylinders, marine propeller shafts, heavy-duty reducers, etc., suitable for working conditions with heavy loads, vibration, and poor centering.
Dalian Redmay bearing import & Export Co., Ltd.
Contact Now