Spherical roller bearings have two rows of rollers, which are mainly subjected to radial loads and can also withstand axial loads in either direction. High radial load capacity, especially suitable for heavy load or vibration load, but can not bear pure axial load. The raceway of this type of bearing is spherical, so its centering performance is good and it can compensate for coaxiality error.
There are two symmetrical spherical rollers. The outer ring has a common spherical raceway. The inner ring has two raceways that are inclined at an angle to the bearing axis. It has good centering performance, when the shaft is bent or installed with different forces. When the bearing can still be used normally, the alignment performance varies with the bearing size series. Generally, the allowed centering angle is 1 to 2.5 degrees. This type of bearing has a larger load capacity. In addition to the radial load, the bearing can withstand Two-way axial load has better impact resistance. In general, the self-aligning roller bearing allows lower working speed.
Related types
Example: NTN LH Series Self-aligning Roller Bearings
The use of self-aligning bearings has gradually increased, especially for long-life bearings in high-temperature environments. For different application environments, NTN engineers have developed STJ2 steels that can extend their service life over a wide temperature range from room temperature to 250°C. This steel is a standard material for LH series self-aligning roller bearings. The characteristics of this bearing are as follows (compared with SUJ2). Long-life bearings with a large temperature range are 3.5 times longer than ordinary materials at room temperature and 30 times longer than ordinary materials at high temperatures (250°C), preventing surface damage, 7 Times of anti-stripping ability, 1.4 times scratch resistance, 2.5 times abrasion resistance, dimensional stability under high temperature conditions, almost no dimensional change at 250°C, increased strength to rupture fatigue, high temperature and tight fit Under the circumstances, increase the fatigue life by 2 times. With a 2X increase in fatigue strength against breakage and simplified part storage management procedures, a single standard bearing model can be used from room temperature to 250°C, and self-aligning roller bearings will gradually be converted to the "LH series."
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