In double row full cylindrical roller bearings, C4 indicates clearance
In double row full cylindrical roller bearings, C4 indicates clearance:The inner diameter is 0 to 30mm (inclusive), and the clearance of C4 is 50 to 75um;The inner diameter is 30 to 40mm (inclusive), and the clearance of C4 is 60 to 85um;The inner diameter is 40 to 50mm (inclusive), and the clearance of C4 is 70 to 100um;The inner diameter is 50 to 65mm (inclusive), and the clearance of C4 is 80 to 110um;The inner diameter is 65 to 80mm (inclusive), and the clearance of C4 is 90 to 125um;The inner diameter is 80 to 100mm (inclusive), and the clearance of C4 is 105 to 140um;The inner diameter is 100 to 120mm (inclusive), and the clearance of C4 is 125 to 165um;The inner diameter is 120 to 140mm (inclusive), and the clearance of C4 is 145 to 190um;The inner diameter is 140 to 160mm (inclusive), and the clearance of C4 is 165 to 215um;The inner diameter is 160 to 180mm (inclusive), and the clearance of C4 is 220 to 250um;The rolling element is a radial roller bearing of cylindrical roller.
The internal structure of cylindrical roller bearing of the roller was 90 degrees vertical arrangement (which is also the cross roller bearing the name of the origin), interval retainer or isolation block is arranged between the roller and the roller can prevent between tilt or roller friction each other, effectively prevent the increase of rotational torque. The clearance of the bearing is also called bearing clearance.brief introductionBearing clearance, that is, the bearings are not installed in the shaft or bearing box, the inner or outer ring of one side of the fixed, and then convenient for the fixed side to do radial or axial movement when the amount of movement. According to the direction of movement, it can be divided into radial clearance and axial clearance.Radial displacement: the amount of movement of one ring from one extreme to the other at the end of a loop when no load is applied, when one ring is fixed and the other is fixed with respect to the fixed ring.Axial clearance: the movement of one of the rings from one extreme to the other in an axial direction, relative to the fixed ring, when there is no load.measureThe clearance (called the work clearance) during operation has an influence on the rolling fatigue life, temperature rise, noise and vibration of the bearings.
When measuring the clearance of a bearing, a prescribed measurement load is generally applied to the bearing in order to obtain a steady measuring value.Therefore, the measured values are greater than the actual clearance (called theoretical clearance), which increases the amount of elastic deformation produced by the measurement load.But for the roller bearings in bearings, because of the small amount of elastic deformation, it can be neglected.The internal clearance of the bearing before installation is generally indicated by theoretical clearance.Frequently asked questions:When the bearing clearance is too small, the most likely situation is the bearing heating, and if the speed is faster, there may be burnt phenomenon.But if we do not pay attention to long time operation in high temperature, high speed environment, it is highly probable that the bearing locking phenomenon, and can cause damage to the supporting shaft or shell strain bearing bearing.Of course, if not under extreme operating conditions, the bearing is rarely caused by locking phenomenon, even in the case of no oil lubrication, the bearing can also works for a long time.Therefore, when the bearing clearance is too small, must not be careless. Proper operation and timely repair can prolong the service life of the bearing.When the bearing clearance is too large, it will cause the rotor to move when it is running.
