German STAR bearings STAR models STAR prices

STAR bearings are linear motion systems produced at low cost, designed for infinite stroke applications in conjunction with cylindrical shafts. They are widely used in sliding components of industrial machinery such as precision machine tools, textile machinery, food packaging machinery, and printing machinery.

STAR bearing introduction

Self-aligning ball bearings consist of an inner ring with two raceways and an outer ring with a spherical raceway, assembled with spherical rolling elements. The center of curvature of the outer ring raceway coincides with the bearing center, providing self-aligning functionality similar to automatic self-aligning ball bearings. They can automatically compensate for misalignment caused by shaft or housing deflection without increasing bearing load. Spherical roller bearings can withstand radial loads and axial loads in both directions. With high radial load capacity, they are suitable for heavy load and shock load conditions. Bearings with tapered bore inner rings can be mounted directly or installed 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 are available with cylindrical bores and tapered bores; cage materials include steel sheet and synthetic resin. The outer ring raceway is spherical, providing automatic self-alignment to compensate for errors caused by misalignment and shaft deflection, but the relative inclination between the inner and outer rings must not exceed 3 degrees. They can withstand significant radial loads and certain axial loads. Due to the spherical outer ring raceway, these bearings have self-aligning performance and can operate when the relative inclination between the inner and outer ring centerlines does not exceed 1° to 2.5° under shaft bending or tilting. Self-aligning ball bearings have cylindrical and tapered bores. The taper of the conical bore is 1:1 2 or 1:30. To enhance lubrication performance, annular oil grooves and three oil holes are machined into the outer ring.

STAR 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. Featuring automatic self-aligning performance, they operate normally under conditions of small relative inclination between the inner and outer rings, making them suitable for applications where strict coaxiality of support seat bores 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 do not require re-lubrication during use. They are suitable for operating temperatures between -30 °C and +120 °C. Main applications of self-aligning ball bearings: Suitable for precision instruments, low-noise motors, automobiles, motorcycles, and general machinery, representing one of the most widely used bearing types in the mechanical industry.

STAR bearing sealing

Bearing seals are categorized into integral seals and external seals. Integral seals refer to bearings manufactured with built-in sealing devices, such as dust covers or sealing rings. This type of seal occupies minimal space, is easy to install and remove, and is cost-effective. External seals refer to sealing devices with various performance characteristics manufactured into end caps or other internal components. External seals are further divided into non-contact seals and contact seals. Non-contact seals are suitable for high-speed and high-temperature applications, with structures including gap seals, labyrinth seals, and washer seals. Contact seals are suitable for medium and low-speed operating conditions, commonly featuring felt seals and lip seals. In engineering design, various seal types are often combined to achieve better sealing performance based on working conditions and environmental requirements. Selection of external bearing seals should consider the following main factors: bearing lubricant type (grease or oil); bearing working environment and space constraints; advantages of the shaft support structure and allowable angular misalignment; circumferential speed of the sealing surface; bearing operating temperature; and manufacturing cost.

Weidou Intelligent Technology specializes in selling German STAR plain bearings, STAR rolling bearings, STAR spherical plain bearings, STAR deep groove ball bearings, STAR angular contact ball bearings, STAR self-aligning ball bearings, STAR thrust ball bearings, STAR double-direction thrust angular contact ball bearings, STAR combination bearings, STAR thrust roller bearings, STAR needle roller bearings, STAR insert ball bearings, STAR spherical roller bearings, STAR flanged bearings, and STAR linear bearings. All STAR products are original imports from Germany. Customers are welcome to inquire and place orders.