German ATN bearings ATN models ATN prices

ATN bearings have raceways on both the inner and outer rings, and the inner and outer rings can move relative to each other along the bearing axis. This type of bearing is particularly suitable for withstanding combined loads, i.e., loads acting radially and axially at the same time. The axial load carrying capacity of angular contact ball bearings increases as the contact angle α increases. The contact angle is the angle between the line connecting the contact points of the ball and the raceway in the radial plane and the perpendicular to the bearing axis.

ATN bearing introduction

Self-aligning ball bearings are bearings with spherical balls assembled between an inner ring with two raceways and an outer ring with a spherical raceway. The center of curvature of the outer ring raceway surface coincides with the bearing center, so it has the same self-aligning function as automatic self-aligning ball bearings. When the shaft or housing deflects, it can automatically adjust without increasing the bearing load. Self-aligning roller bearings can withstand radial loads and axial loads in two directions. They have high radial load capacity and are suitable for heavy load and impact load conditions. Bearings with tapered bore inner rings can be installed directly, or mounted on cylindrical shafts using adapter sleeves or withdrawal sleeves. The cages use stamped steel cages, molded polyamide cages, and machined copper alloy cages. Self-aligning ball bearings come in two structures: cylindrical bore and tapered bore. Cage materials include steel plates and synthetic resins. Their characteristic is that the outer ring raceway is spherical, providing automatic self-alignment capability, which can compensate for errors caused by misalignment and shaft deflection. However, the relative inclination between the inner and outer rings must not exceed 3 degrees. They can withstand large radial loads and certain axial loads. Since the outer ring raceway of this type of bearing is spherical, it has self-aligning performance. When the shaft bends or tilts under force, causing the relative inclination between the inner ring centerline and the outer ring centerline to not exceed 1°～2.5°, the bearing can still operate. Self-aligning ball bearings have two types of inner bores: cylindrical and tapered. The taper of the tapered inner bore is 1：1 2 or 1：30. To enhance lubrication performance, annular oil grooves and three oil holes are machined on the outer ring of the bearing.

ATN bearing features and structure

Primarily withstands radial loads while also accommodating smaller axial loads. Axial displacement of the shaft (housing) is limited within the clearance range. It features automatic self-aligning performance, allowing normal operation under conditions of small relative inclination between the inner and outer rings. It is suitable for components where strict coaxiality of support seat holes cannot be guaranteed. Structural forms: Self-aligning ball bearings with dust covers and seals are pre-filled with an appropriate amount of grease during assembly. They should not be heated or cleaned before installation, and no further lubrication is required during use. They are suitable for operating temperatures between - 30 ℃ and + 120 ℃. Main applications of self-aligning ball bearings: Suitable for precision instruments, low-noise motors, automobiles, motorcycles, and general machinery, making them one of the most widely used bearings in the mechanical industry.

ATN bearing sealing

Bearing seals can be divided into two categories: integrated seals and external seals. Integrated bearing seals refer to bearings manufactured with inherent sealing devices, such as those with dust covers or sealing rings. This type of seal occupies minimal space, is easy to install and remove, and is relatively low-cost. External bearing sealing devices involve creating various performance sealing mechanisms within components like end caps during installation. External bearing seals are further divided into non-contact seals and contact seals. Non-contact seals are suitable for high-speed and high-temperature applications, featuring structures such as gap seals, labyrinth seals, and gasket seals. Contact seals are suitable for medium and low-speed operating conditions, commonly using felt seals and lip seals. Depending on the sealing requirements based on bearing operating conditions and working environment, engineering designs often combine various seal types to achieve better sealing effectiveness. Selection of external bearing seals should consider the following main factors: bearing lubricant type (grease and oil); bearing working environment and space occupancy; advantages of the shaft support structure and allowable angular deviation; circumferential speed of the sealing surface; bearing operating temperature; and manufacturing cost.

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