The outer ring raceway is spherical, and its center of curvature coincides with the bearing center. Therefore, the inner ring, balls, and cage can rotate freely around the bearing center, providing self-aligning capability. This makes the bearing suitable for application such as transmission shafts where it is difficult to align the shaft and housing, or where the shaft is prone to deflection. Because the contact angle is small, the axial load capacity is also limited. A pressed steel cage is generally used.
The permissible self-aligning angle of self-aligning ball bearing is approximately 0.07–0.12 radians (4–7 degrees) under normal load condition. Please note that in some cases, depending on the relevant mounting dimension around the bearing, this self-aligning angle may not be achievable.
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Features of 2200 Series Self-Aligning Ball Bearings
The core features of the 2200 series are: a widened series of self-aligning ball bearings with self-aligning capability, designed primarily to carry radial load, with cage material varying by brand and specific model. The basic self-aligning principle is the same as that of the 1200 and 1300 series, but the dimensional series differs.
Spherical outer ring raceway: The outer ring raceway is spherical, with its center of curvature coinciding with the bearing center, allowing the inner ring, balls, and cage to deflect freely and compensate for shaft deflection or mounting misalignment.
Misalignment limit: The relative misalignment between the inner and outer rings must not exceed 3 degrees.
Primarily radial loads: Designed mainly to carry radial load and can also accommodate small axial load, but cannot carry pure axial load.
Performance example: Taking the basic 2200 model as an example, NSK data shows a basic dynamic load rating of approximately 8,200 N, a static load rating of approximately 1,590 N, and a limiting speed with grease lubrication of up to 24,000 min⁻¹. Specific values vary by brand (e.g., FAG, SKF) due to differences in design and cage configuration.
Cages and Variants
Various cage material: Common configuration include pressed steel cage (standard for NSK 2200) and glass fiber reinforced polyamide (nylon) cages (e.g., the TVH suffix in FAG 2200-2RS-TVH).
Seal and bore type: Some models offer double-sided contact seal (suffix 2RS), suitable for grease lubrication or harsher operating condition. Standard is a cylindrical bore; the suffix K indicates a tapered bore (taper 1:12).
Suitable for double-support arrangement where the shaft is prone to bending or where strict coaxiality of the housing bore cannot be guaranteed, as well as general machinery application requiring higher speed and lower friction.
| Inquiry | Bearing Designation | Dimension（mm） | Basic load ratings (kN) | Speed ratings(rpm) | Weight | ||||
|---|---|---|---|---|---|---|---|---|---|
| d | D | B | Cr | Cor | Grease | Oil | (Kg) | ||
