KNOWLEDGE

Self Aligning Ball Bearing Introduction

self aligning ball bearing

 

Self Aligning Ball Bearing Structure:

Self-aligning ball bearing is a double row bearing with spherical outer ring raceway.
The inner ring, ball, and cage can rotate freely around the center of the bearing, with self-aligning properties.
Its centering ability can compensate for alignment errors, shaft deformation and bearing seat deformation.
It is mainly used to bear radial load. While bearing radial load, it can also bear a small amount of axial load, but generally cannot bear pure axial load, and its limit speed is lower than that of deep groove ball bearings.


For double row self-aligning ball bearings, if there is “K” suffix in bearing model number (for example 1213K bearing), it means bearing has taper, and the taper is 1: 12.
Self aligning bearings have  three seal types – Open, 2RS, and ZZ.
Self aligning ball bearings are widely used in below applications,
Precision instruments, low-noise motors, automobiles, motorcycles and general machinery, etc.

Self Aligning Ball Bearings Clearance:

Normally, self aligning ball bearings have C0 and C3 two clearance group. C0 is standard clearance, while C3 clearance is larger than C0 clearance.
C3 oil gap bearings are suitable for the following occasions,
The temperature difference between the inner and outer ring is large, bear a large load or need to improve the self-aligning performance。
C0 oil gap is suitable for the following occasions,
The rotation accuracy is high, or the axial displacement needs to be strictly controlled。

Cage Material:

Common cages are steel cage, brass cage and nylon cage

Features:

1. Adapt to the alignment error
Self-aligning ball bearings can better adapt to alignment errors than any other bearing.
Even in the case of shaking, the bearing can still run smoothly.

2. Excellent high-speed performance
Self-aligning ball bearings have the lowest starting and running friction among all roller bearings.
In other words, the bearing has excellent high-speed performance.

3. Minimum maintenance requirements
Only a small amount of lubricant is needed to make bearings run efficiently.
Its low friction and excellent design extend the relubrication interval.
Sealed bearings do not need to be relubricated.

4. Low noise and vibration level
A large number of comparative tests show that self-aligning ball bearings have accurate and smooth raceway, so that they have the lowest level of vibration and noise.

Double Row Self Aligning Bearings Size Chart:

Model Number Specifications(dxDxB) Weight/kg
1200 10x30x9 0.035
1201 12x32x10 0.042
1202 15x35x11 0.051
1203 17x40x12 0.076
1204 20x47x14 0.119
1205 25x52x15 0.114
1206 30x62x16 0.226
1207 35x72x17 0.318
1208 40x80x18 0.418
1209 45x85x19 0.469
1210 50x90x20 0.545
1211 55x100x21 0.722
1212 60x110x22 0.896
1213 65x120x23 0.915
1214 70x125x24 1.29
1215 75x130x25 1.35
1300 10x35x11 0.06
1301 12x37x12 0.07
1302 15x42x3 0.099
1303 17x47x14 0.138
1304 20x52x15 0.174
1305 25x62x17 0.258
1306 30x72x19 0.39
1307 35x80x21 0.54
1308 40x90x23 0.71
1309 45x100x25 0.96
1310 50x110x27 1.21
1311 55x120x29 1.58
1312 60x130x31 1.96
1313 65x140x33 2.39
1314 70x150x35 2.98
1315 75x160x37 3.55
2303 17x47x19 0.219
2304 20x52x21 0.219
2305 25x62x24 0.355
2306 30x72x27 0.501
2307 35x80x31 0.675
2308 40x90x33 0.959
2309 45x100x36 1.25
2309 45x100x36 0
2310 50x110x40 1.66
2311 55x120x43 2.09
2312 60x130x46 2.66
2313 65x140x48 3.22
2314 70x150x51 3.92
2315 75x160x55 4.71
2316 80x170x58 5.7
2203 17x40x16 0
2204 20x47x18 0.149
2205K 25x52x18 0.16
2206K 30x62x20 0.254
2207K 35x72x23 0.4
2208K 40x80x23 0.519
2209K 45x85x23 0.55
2210K 50x90x23 0.6
2211K 55x100x25 0.82
2212K 60x110x28 1.09
2213K 65x120x31 1.46
2214K 70x125x31 1.52
2215K 75x130x31 1.62
2216K 80x140x33 2
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