QIBR self-aligning ball bearing product structure outer ring raceway is spherical, inner ring has double raceway, bearing plays the role of self-aligning, that is, when the bearing bends by load or the inner ring axial line tilts relative to that of outer ring caused by installation error, the bearing can still operate normally. It is also possible to deal with the shaft flexure, but generally the angle does not exceed 3 degree. It is designed mainly to bear radical load, and can also bear certain axial load while taking radial load, but it cannot bear axial load only.

Common structure of self-aligning ball bearing: outer ring, inner ring and retainer. Under some circumstances, it can be used as closed self-aligning ball bearing, that is, making it come with bearing shield, sealing ring and lubricating grease. Its working temperature is between 30℃ and 120℃.

self-aligning ball bearing illustration

Tolerance of QIBR self-aligning ball bearing conforms to rules of China State Standard GB/307.1 Rolling Bearings-Radial Bearing-Tolerances, and clearance confirming to Rolling Bearing-radical clearance, with dimensions meeting requirements of GB/T273.3 Rolling bearings-Boundary dimensions, general plan, and GB/T281 Rolling bearings—Self-aligning ball bearings—Boundary dimensions.

Raw material

QIBR precision anti-friction bearings are usually made of chrome steel, which consist of about 1% carbon, 1.5% chromium and a small amount of manganese, silicon, and sometimes a small amount of molybdenum.

QIBR offers you a wide range of material options such as GCr15, 100Cr6, SKF 3, SUJ-2 etc. At the same time, some models of QIBR are available in stainless steel.

The rolling element can be ceramic ball (silicon nitride). Due to ceramic is kind of special material, the ceramic ball bearing has advantages of higher rotation speed, good self-lubricating property, and the rigidity is 15%-20% higher than the general bearing, and better high temperature resistance.

Seals

In order to prevent contaminants from entering the inside of the bearing, QIBR uses a metal dust cover or a rubber seal with a metal skeleton.

QIBR are able to choose two types as a combination seals according to your working conditions, or choose different kinds of seal materials, such as nitrile rubber BUNA, acrylic rubber HYCAR, fluoro rubber VITON.

Radial clearance

The radial clearance is the gap between the steel ball and the ring. QIBR is precisely tailored to customer's temperature conditions, interference fit, misalignment of the bearing's axis, required noise level and speed.

The adopted steel balls

The steel balls in the deep groove ball bearings used by QIBR are mainly designed according to the load requirements of the bearing. The bearing ball sizes of different models are different, generally the value of rib coefficient Kd (ditch depth) range 0.35-0.40. , related to bearing diameter, such as 6000 series Kd = 0.35, 6400 series Kd = 0.40; 6200 and 6300 series, d ≤ 25mm take Kd = 0.35, d > 25mm take Kd = 0.40. Groove depth = Kd × steel ball diameter.