NACHI automotive alternator bearing model 6302
The NACHI automotive alternator bearing model 6302 is a single-row deep groove ball bearing designed to handle combined radial and axial loads at high speeds. It features a 15-millimeter inner diameter, 42-millimeter outer diameter, and 13-millimeter width. The balls are made of SUJ2 chrome alloy steel with a surface hardness of 60 to 64 HRC, and the rings are of the same material. The cage is typically made of pressed steel or heat-resistant polyamide. Dimensional tolerance complies with ISO 492 standards, precision class P6. The groove geometry is arc-shaped, reducing friction and extending service life.
The NACHI 6302 bearing is manufactured using controlled heat treatment and precision grinding with micron-level tolerances to ensure dynamic stability at high rotational speeds. Its operating temperature range is from minus 30 to plus 150 degrees Celsius. Lubrication is provided by lithium-based NLGI-2 grease or ISO VG 68 oil. The maximum rotational speed is 16000 rpm with grease and 20000 rpm with oil. This bearing is widely used in automotive alternators, water pumps, electric motors, and light industrial equipment.
