Product characteristics and classification of self-aligning ball bearings

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Product characteristics and classification of self-aligning ball bearings

Source: China Bearing Network Time: 2014-06-29
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The product characteristic self-aligning ball bearing has two rows of balls; the outer ring has a concave spherical raceway; and the middle of the curvature is common with the bearing; even if the inner ring, the steel ball and the cage are slightly skewed relative to the outer ring; Thus the bearing is self-aligning; it is not affected by the misalignment of the shaft relative to the bearing housing. It is primarily used to accept radial loads; it also accepts a small amount of axial load; it is usually not acceptable for pure axial loads. Uniquely suitable for those capable of A considerable amount of shaft deflection or misalignment of the bearing occurs. For example, fine appearance, low noise motor, automobile, motorcycle, woodworking machinery, textile machinery drive shaft, mining machinery, electromechanical equipment, plastic machinery, work equipment, medical Equipment, fitness and sports equipment and general machinery; is the most widely used type of bearing in the machinery industry.
● Product classification ZWZ produces self-aligning ball bearings that can be roughly divided into two types:
Cylindrical bore self-aligning ball bearing tapered bore self-aligning ball bearing cylindrical bore self-aligning ball bearing with two rows of steel balls and curved raceway in the outer ring; self-aligning ball bearings can be actively aligned; and can accept shaft and Viewpoint error between the bearing housings; suitable for simple presentation of shaft deflection and misalignment caused by different cores. The friction of self-aligning ball bearings is the lowest of all rolling bearings; so even at high speeds; Only has a small temperature rise.
Conical bore self-aligning ball bearings have the characteristics of cylindrical bore self-aligning ball bearings; but the inner bore is a tapered bore (conventional taper 1:12); the device can fine-tune the clearance of the bearing on the tapered shaft. This type of bearing is mostly used for loads. Under the effect of the double-supported double-supported shaft; and the two bearing seats can not ensure the strict concentric parts. Firstly used to accept radial load; also accept a small amount of axial load; usually can not accept pure axial load. The versatility of this type of bearing is second only to deep groove ball bearings; its limit speed is lower than that of the same standard deep groove ball bearing; but its bearing capacity is higher than that of deep groove ball bearings.
â–  The scale of the scale ZWZ self-aligning ball bearings is listed in the scale data sheet:
Inner diameter scale: 25mm ~ 1100mm
Outer diameter scale: 52mm ~ 1300mm
Width scale scale: 15mm ~ 300 mm
â—† The ZWZ standard type self-aligning ball bearing has the normal level; it is consistent with GB307.1.
▲ Radial clearance ZWZ standard self-aligning ball bearings have C2, internal (CN), C3, C4 and C5 internal clearances; all are in accordance with GB4604. Conical bore self-aligning ball bearings are based on C3 clearance. Radial The clearance values ​​are detailed in the preamble table; the values ​​are applicable to unmounted and unloaded bearings. Bearings with internal clearances greater or less than the specified value can also be produced according to user requirements.
★ The cage holder usually adopts stamping frame, brass solid frame and nylon frame; the raw materials are steel plate, brass and synthetic resin.
When the bearing outer diameter D≤200mm; use steel plate (belt) stamping cage; the rear code of the cage is not marked.
When the outer diameter of the bearing is D>200mm; the brass solid cage is used; the rear code of the cage is not marked.
The bearing running temperature of nylon frame can reach up to +120 °C; for bearings that need to run continuously under high temperature or bad conditions; can consider the choice of brass solid frame. If you need non-standard cage bearing; can contact ZWZ beforehand.
■ Equivalent dynamic load when Fa/Fr≤e; P=Fr+Y1Fa
When Fa/Fr>e; P=0.65Fr+Y2Fa The values ​​of e, Y1 and Y2 in the formula can be found in the bearing table.
★ Equivalent static load P0=Fr+Y0Fa The value of Y0 in the formula can be found in the bearing table.
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