German KTR bearings KTR models KTR prices

KTR bearings can simultaneously withstand radial and axial loads. They can operate at higher speeds. The greater the contact angle, the higher the axial load capacity. The contact angle is the angle between the line connecting the contact points of the ball and raceway in the radial plane and the perpendicular to the bearing axis. High-precision and high-speed bearings typically use a 15 degree contact angle. Under axial force, the contact angle increases.

KTR 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. Spherical 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 shock load conditions. Bearings with tapered bore inner rings can be installed directly, or mounted on cylindrical shafts using adapter sleeves or withdrawal sleeves. Cages include stamped steel cages, molded polyamide cages, and machined copper alloy cages. Self-aligning ball bearings have two structures: cylindrical bore and tapered bore. Cage materials include steel plate and synthetic resin. Their characteristic is that the outer ring raceway is spherical, providing automatic self-alignment to 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 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.

KTR bearing features and structure

Primarily withstands radial loads, while also capable of withstanding smaller axial loads. Axial displacement of the shaft (housing) is limited within the clearance limit. It has 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 the support housing bore cannot strictly guarantee coaxiality. Structural forms: Self-aligning ball bearings with dust covers and seals are 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. They are the most widely used type of bearing in the mechanical industry.

KTR bearing sealing

Bearing seals can be divided into two categories: integral seals and external seals. Integral bearing seals mean the bearing itself is manufactured with sealing devices, such as dust covers and seal rings. This type of seal occupies very little space, is easy to install and disassemble, and has a relatively low cost. External bearing sealing devices refer to sealing devices with various performances manufactured inside end caps, etc. 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, with different structural forms such as gap seals, labyrinth seals, and washer seals. Contact seals are suitable for medium and low-speed operating conditions, with common structural forms including felt seals and leather cup seals. According to the sealing requirements of bearing working conditions and environments, engineering design often comprehensively uses various sealing forms to achieve better sealing effects. The selection of external bearing seals should consider the following main factors: bearing lubricant type (grease and oil); bearing working environment and space occupation; advantages of shaft support structure and allowable angular deviation; circumferential speed of the sealing surface; bearing operating temperature; and manufacturing cost.

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