Pressure lead method and plugging method for measurement, radial clearance translation in the bearing code is not marked, bearing clearance according to the size of its inner diameter and different, check the table to determine, in general rolling bearing radial clearance can not be greater than bearing inner diameter of three thousandths, to the heart of the short cylindrical bearing radial clearance can not be greater than bearing inner diameter of two thousandths.

Bearing clearance is also known as bearing clearance

Bearing clearance that bearing in not installed in the shaft or bearing box, will be its inner ring or outer ring of a fixed, and then to facilitate the side not fixed to do radial or axial movement when the amount of movement. According to the direction of movement, can be divided into radial clearance and axial clearance.

Radial clearance: in no load, when a collar is fixed, another collar relative to the fixed collar along the radial direction from one extreme position to another extreme position of the movement amount.

Axial clearance: in no load, when a collar fixed, another collar relative to the fixed collar along the axial by an extreme position to another extreme position of the movement amount.

To view bearing damage, it can be found in most cases, it may lead to them, in general, bearing fatigue damage caused by damage only one-third from poor lubrication occurs, and the other one-third from contaminants generated into the bearing or improper installation treatment. However, these types of damage are not related to industrial bearings are precision parts, and therefore require considerable time with a cautious attitude, even with high-performance bearings, if used improperly, can not achieve the desired performance effect, and easy to make bearing damage.

Therefore, the use of bearings should pay attention to the following points:

First, keep the bearing and its surrounding environment clean, even into the bearing of tiny invisible dust, will increase the bearing wear, vibration and noise.

Second, the use of installation carefully, let the powerful stamping, do not allow direct hit with the hammer bearing does not allow the pressure through the meridian.

Third, appropriate and accurate mounting tools to take advantage of the use of special tools, try to avoid the use of cloth and short fibres and the like.

Fourth, to prevent bearing corrosion bearing directly with the hand to pick, fully wash hand sweat, and then use high-quality mineral oil coated to pay attention to anti-rust. However, in some special operating conditions, the bearing can get a longer life than the traditional calculation, especially in light load conditions. These special operating conditions are when the rolling surface (track and rolling parts) is an effective lubricating film separates and limits the contaminants that can cause surface damage.