The installation of angular contact ball bearing
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Angular contact ball bearing installation is more complex than the deep groove ball bearings, are installed in pairs, and the pre load. Installed well, can make the host working accuracy, bearing life is greatly increased; otherwise, not only the precision is not up to the requirement, the life will also be affected.
The installation form
The installation form of angular contact ball bearing, a back to back, face to face and are arranged in series three. Back to back (two wide end bearing relative) installation, bearing contact angle line along the axis direction diffusion, bearing angle can increase the radial and axial rigidity, maximum deformation resistance; face to face (narrow end two bearing relative) installation, bearing contact angle line towards the axis of rotation direction of convergence, the to the small angle rigidity. Because of the inner ring of the bearing outer ring out, when pressing the outer ring two bearing outer ring together, the original clearance elimination, can increase the bearing preload; tandem array (two wide end bearing in one direction) installation, bearing contact angle lines in the same direction and in parallel, the two bearing sharing the same the direction of the work load. But the use of this type of installation, in order to ensure the stability of the axial installation, two pairs of bearing series must be installed at both ends of the counter shaft.
Get preload
Pre load through the grinding end surface of a ring of bearing, or between two different thickness of the spacer ring is placed between a pair of bearing inner, outer ring, the bearing clamped together, so the steel ball in close contact with the raceway and.
Great influence of preload the size of the bearing life, according to the information, when the bearing assembly has 0. 012mm interference, the service life is reduced by 38%, 0. 016mm interference, the service life is reduced by 50%; when the bearing assembly has 0. When the 004mm gap, service life significantly decreased, 0. When the 008mm gap, service life is down 70%. Therefore, appropriate selection of pre load size, very important. The general high speed should be chosen small preload, low speed should be selected large preload. At the same time, pre load should be slightly greater than or equal to the axial load.
Calculation of preload
Selection of pre load, calculation formula of minimum preload is as follows:
Aomin=1.58tgaR + 0.5A (N)
Type R� � radial loads acting on the bearings on the (N)
A� � axial loads acting on the bearings on the (N)
A� � through the ball and roll angle straight points of contact between the line each ball with center plane of (the nominal contact angle):
7000C a=15 °
7000AC a=25 °
7000B a=40 °
The pairs of bearings in each bearing are given by the formula. Type in "+" sign for axial load so that the original pre interference value that a bearing to reduce; "�" for axial load so that the original pre interference value that a bearing increase. The minimum preload amount Aomin two pairs of bearings should be according to the two bearing the two maximum values in the selected (according to the assembly experience, usually take about 50N preload).
Pre load adjustment
Idle test. Angular contact ball bearing the assembly qualified after the inspection, to the operating speed for the air operation test, time is not less than 2h, the temperature should not exceed 15 ℃
234407BM 234706BM 234406BM 517/2860V/YA 5610/2500 517/1720X1V 527/1181M 510/1180M 517/930 510/670 590/560 510/500 52780 59080 517/368M 51760U 517/238 6207-2ZN 6206-2ZN 6205-2ZN 6204-2ZN 6203-RZ 6203-2ZN 6202N 6202-2ZN 6201-2ZN 6200ZZ 6200-2ZN 62/32-ZN 62/32-Z 62/32N 62/32-2Z 62/32-2RZ 62/32-2RS 62/28-2RZ 62/22-2RZ 61996 61992 61988 61984
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Angular contact ball bearings installedAngular contact ball bearing installation is more complex than the deep groove ball bearings, are installed in pairs, and the pre load. Installed well, can make the host working accuracy, bearing life is greatly increased; otherwise, not only the precision is not up to the requirement, the life will also be affected.
The installation form
The installation form of angular contact ball bearing, a back to back, face to face and are arranged in series three. Back to back (two wide end bearing relative) installation, bearing contact angle line along the axis direction diffusion, bearing angle can increase the radial and axial rigidity, maximum deformation resistance; face to face (narrow end two bearing relative) installation, bearing contact angle line towards the axis of rotation direction of convergence, the to the small angle rigidity. Because of the inner ring of the bearing outer ring out, when pressing the outer ring two bearing outer ring together, the original clearance elimination, can increase the bearing preload; tandem array (two wide end bearing in one direction) installation, bearing contact angle lines in the same direction and in parallel, the two bearing sharing the same the direction of the work load. But the use of this type of installation, in order to ensure the stability of the axial installation, two pairs of bearing series must be installed at both ends of the counter shaft.
Get preload
Pre load through the grinding end surface of a ring of bearing, or between two different thickness of the spacer ring is placed between a pair of bearing inner, outer ring, the bearing clamped together, so the steel ball in close contact with the raceway and.
Great influence of preload the size of the bearing life, according to the information, when the bearing assembly has 0. 012mm interference, the service life is reduced by 38%, 0. 016mm interference, the service life is reduced by 50%; when the bearing assembly has 0. When the 004mm gap, service life significantly decreased, 0. When the 008mm gap, service life is down 70%. Therefore, appropriate selection of pre load size, very important. The general high speed should be chosen small preload, low speed should be selected large preload. At the same time, pre load should be slightly greater than or equal to the axial load.
Calculation of preload
Selection of pre load, calculation formula of minimum preload is as follows:
Aomin=1.58tgaR + 0.5A (N)
Type R� � radial loads acting on the bearings on the (N)
A� � axial loads acting on the bearings on the (N)
A� � through the ball and roll angle straight points of contact between the line each ball with center plane of (the nominal contact angle):
7000C a=15 °
7000AC a=25 °
7000B a=40 °
The pairs of bearings in each bearing are given by the formula. Type in "+" sign for axial load so that the original pre interference value that a bearing to reduce; "�" for axial load so that the original pre interference value that a bearing increase. The minimum preload amount Aomin two pairs of bearings should be according to the two bearing the two maximum values in the selected (according to the assembly experience, usually take about 50N preload).
Pre load adjustment
Idle test. Angular contact ball bearing the assembly qualified after the inspection, to the operating speed for the air operation test, time is not less than 2h, the temperature should not exceed 15 ℃
