Ball Bearings Rotational Friction Small Resistance

Ball bearings are mainly composed of four basic components: ball, inner ring, outer ring and cage also called cage. General industrial ball bearings to meet the standard AISI 52100, ball and ring are usually made of high-chromium steel, Rockwell hardness of about 61-65. The hardness of the retainer compared with the ball and the ring is low, the material is a metal (such as: carbon steel, aluminum alloy) or non-metallic (such as: Teflon, PTEF, polymer materials). Ball bearings than the journal bearing rotation friction resistance, so the same speed, the friction generated by the temperature will be lower.

Rolling bearings made of steel balls. Ball bearings have a single row to the heart, double row to the spherical center, to the heart thrust, thrust and thrust to the heart and other structural types.

① single row radial ball bearings: compact structure, easy to use, the most widely used. Mainly to withstand radial load, but also can withstand a certain amount of axial load. In high-speed devices, it can also be used instead of thrust bearings. The friction of this bearing small, high speed limit, suitable for larger rigid double bearing shaft. The inclination of the shaft relative to the housing is allowed in the range of 8 'to 16'.

② double row radial spherical ball bearings: it has two columns of steel balls, the outer ring raceway is centered on the center of the spherical bearing, inner and outer ring axis tilt in the 2 ° ~ 3 ° still work, self-aligning performance. This bearing is mainly used to bear the radial load, but also can withstand the axial load is not large, suitable for multi-bearing and large deflection shaft drive.

③ to the heart thrust ball bearings: Radial axial load can withstand the joint load, high speed limit. Nominal contact angle of ball and outer ring

Divided into 12 °, 26 ° and 36 ° 3, the contact angle of the great ability to withstand greater axial load.

Thrust ball bearings: one-way and two-way. Thrust ball bearings have two living ring, a tight circle, two rows of rolling elements and two cage. Tight circle and shaft sleeve, live ring mounted on the bearing seat, live ring diameter than the tight circle diameter 0.2 ~ 1 mm. Thrust ball bearings can only withstand unidirectional axial load, two-way thrust ball bearings can withstand axial load in both directions. This bearing is not suitable for high-speed work, high-speed thrust ball bearings should be used.

⑤ thrust radial ball bearings: contact angle

Greater than 45 °, can withstand the axial load mainly axial radial combined load. Thrust ball bearings than the speed limit.

Ball bearings are a kind of rolling bearings, ball ball installed in the middle of the inner ring and outer ring, can withstand greater load. Also known as ball bearings. Ball bearings than the journal bearing rotation friction resistance, so the same speed, the friction generated by the temperature will be lower. Ball bearings have a single row to the heart, double row to the spherical center, to the heart thrust, thrust and thrust to the heart and other structural types. This bearing is mainly used to bear the radial load, but also can withstand the axial load is not large, suitable for multi-bearing and large deflection shaft drive. Thrust ball bearings have two living ring, a tight circle, two rows of rolling elements and two cage.