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1 Accuracy
The accuracy of rolling bearings is Bearing Accuracy divided into dimensional accuracy and rotational accuracy. Specifications for accuracy shall be in accordance with GB / t18254 and GB / t3073-96.
The rolling bearings manufactured by Yuyuan Bearing Manufacturing Co., Ltd. are in accordance with GB / Bearing Accuracy t18254, GB / t307-96 and JB / t8921-99 standards. Used in accuracy specification table
The codes are as follows:
(1) Dimension (5) rotation accuracy
d: Nominal bearing inner diameter Kia (KI): radial runout of inner ring
D: Nominal bearing inner diameter SIA (SI): axial runout of inner ring
B: Nominal inner ring width SD (SDI): lateral runout of inner ring
C: Nominal outer ring width Kea (KE): radial runout of outer ring
r: Chamfer dimension of inner ring or outer ring sea (SE): axial runout of outer ring
SD (SD): perpendicularity of outer diameter surface seal: axial runout on the back of flange surface
(2) Dimensional deviation
Δ Ds: dimensional deviation of inner diameter
Δ DMP: dimensional deviation of average inner diameter in plane
( Δ DM): dimensional deviation of average inner diameter
Δ Ds: dimensional deviation of outer diameter
Δ DMP: dimensional deviation of average outer diameter in plane
( Δ DMP): dimensional deviation of average outer diameter
Δ BS: dimensional deviation of inner ring width or central ring height
Δ CS: dimensional deviation of outer ring width
Δ Dis: dimension deviation of measured flange outer diameter
Δ Dis: dimensional deviation of measured flange width
RS Min: small allowable chamfer Bearing Accuracy size of inner ring and outer ring
RS Max: small allowable chamfer size of inner ring and outer ring
(4) Dimensional variation
VDP: in-plane inner diameter variation
VDMP: average inner diameter variation in plane
VDP: change of plane internal and external diameter
VDMP: variation of average outer diameter in plane
VBS: inner ring width variation
VCs: outer ring width variation
VCIs: flange width variation
Ina bearing is a precision part, so it is required to be quite cautious in use, that is, it uses a high-performance thrust ball bearing. If it is not used properly, it can not achieve the Bearing Accuracy expected performance effect, and it is easy to damage the bearing. Therefore, pay attention to the following matters when using bearings:
Even if the invisible smile dust enters the bearing, it will increase the wear, Bearing Accuracy vibration and noise of the bearing.
It is not allowed to punch with force, directly knock the bearing with a Bearing Accuracy hammer, and transfer pressure through the rolling element. It is hoped that the INA Bearing package will be opened during installation. During general grease lubrication, the bearing is not cleaned, but directly filled with grease.
In case of oil lubrication, it is generally not necessary to clean. However, Bearing Accuracy bearings for instrument or high-speed use shall be cleaned with clean oil to remove the antirust agent coated on the bearings. Bearings with rust inhibitor removed are easy to rust, so they cannot be placed at will.