what is the principle of select c3 clearance roller bearings?

The c3 clearance roller bearings refers to the amount of movement when the bearing is fixed when one of the inner ring or the outer ring is fixed, and then the unfixed one is moved in the radial or axial direction. According to the direction of movement, it can be divided into radial clearance and axial clearance. The size of the running c3 clearance roller bearings (called the working clearance) affects the rolling fatigue life, temperature rise, noise, vibration and other properties of the bearing. The radial clearance of rolling bearings is generally divided into groups of /C1, /C2, /C0, /C3, /C4, /C5. Groups 1 and 2 belong to small clearance; group 0 is the standard group clearance; groups c3 clearance roller bearings, 4 and 5 are larger gap groups. The choice of the rolling bearing clearance group should be selected according to the corresponding standard according to the product type, size, temperature used, and tightness with the shaft and hole. Of course, this is a problem that should be determined when the equipment is selected. The detection of c3 clearance roller bearings is also subject to professional testing in accordance with relevant industry standards.

Ta is the ambient temperature.
T0 is the outer ring temperature of the spherical roller bearing and the inner ring temperature of the Ti spherical roller bearing.

First, the principle of selection of c3 clearance roller bearings:
1. Use a tighter fit, where the temperature difference between the inner and outer rings is large, the friction torque needs to be reduced, and the deep groove ball spherical roller bearing is subjected to a large axial load or needs to improve the centering performance.
2. When the rotation precision is high or the axial displacement is strictly limited, a small clearance group should be used.

Second, the factors related to the play:
1. The inner ring of the spherical c3 clearance roller bearings is matched with the shaft.
2. The fit of the outer ring of the spherical c3 clearance roller bearings and the hole of the outer casing.
3. The effect of temperature.
Note: The radial clearance reduction is related to the actual effective interference of the mating parts, the matching shaft diameter, and the wall thickness of the housing bore.

1. The actual effective interference (inner circle) should be: △ dy = 2 / 3 △ d - G * Δd is the nominal interference, and G * is the flattening size of the interference fit.

2. The actual effective interference (outer ring) should be: △Dy=2/3△D–G*△D is the nominal interference, and G* is the flattening size of the interference fit.

3. The heat generated will cause the internal temperature of the spherical roller bearing to rise, which in turn causes the expansion of the shaft, the spherical roller bearing housing and the spherical c3 clearance roller bearings parts. The clearance can be increased or decreased depending on the material of the shaft and the spherical c3 clearance roller bearings housing.

ZYSL company specializes in c3 clearance roller bearings for many years. All raw materials and accessories have been carefully selected to ensure a good user experience.

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