Ball Bearing

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Dalian Redmay bearing import & Export Co., Ltd.

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# Angular Contact Ball Bearings: An Analysis of Advantages, Features, and Manufacturing Processes

Angular Contact Ball Bearings (ACBB) are precision bearings with steel balls as rolling elements, where the raceways form a certain angle with the axis. Widely used in high-speed, heavy-load scenarios such as machine tool spindles and automotive gearboxes, they boast distinctive core advantages, structural features, and manufacturing processes.

Their advantages are remarkable. First, they exhibit excellent high-speed performance. The steel balls have a low rolling friction coefficient, and when combined with an optimized cage design, their limiting speed is much higher than that of roller bearings. Some high-precision models can adapt to rotational speeds exceeding 10,000 rpm. Second, they possess strong combined load capacity. Through the design of contact angles (usually 15°, 25°, 40°), they can withstand both radial and unidirectional axial loads—the larger the contact angle, the stronger the axial load-bearing capacity. Third, their rigidity is adjustable. Multiple sets of bearings, installed in configurations like back-to-back or face-to-face, can form a high-rigidity support system, meeting the needs of precision machining equipment.

Their structural features are distinct. They mainly consist of an inner ring, outer ring, steel balls, and a cage. The raceways of the inner and outer rings are grooved and share a common contact angle vertex. Classified by contact angle into Type C (15°), Type AC (25°), and Type B (40°), they cater to high-speed, general, and heavy-load scenarios respectively. Cages are mostly made of engineering plastic or brass—the former is lightweight and low-friction, while the latter is high-temperature resistant and impact-resistant. Some models come with sealing rings for dust and water protection, extending the maintenance cycle.

The manufacturing process is rigorous. Materials such as high-carbon chromium bearing steel GCr15 or stainless steel are used, reaching a hardness of HRC 60-64 after quenching and tempering. The processing follows the sequence of "forging - turning - heat treatment - grinding - superfinishing". The raceway grinding precision reaches IT5 grade, with surface roughness as low as Ra 0.01μm. Assembly adopts the "group matching method" to ensure steel ball size consistency and clearance accuracy. Finished products undergo multi-dimensional tests including rotational precision, vibration noise, and service life. High-precision models have vibration values controlled above Z2 grade to ensure stability during high-speed operation.

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Dalian Redmay bearing import & Export Co., Ltd.

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Main Product: bearing, thrust bearing, spherical roller bearing , railway bearing, cylindrical roller bearing, Mechanical processing

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