German STORZ bearings STORZ models STORZ prices

STORZ bearings are available with cylindrical bore and tapered bore structures. Cage materials include steel sheet and synthetic resin. The outer ring raceway is spherical, providing self-aligning capability 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.

STORZ bearing classification

1) Single-row angular contact ball bearings can only withstand axial load in one direction. When subjected to radial load, an additional axial force is generated. They can only restrict axial displacement of the shaft or housing in one direction. The contact angle of angular contact ball bearings is 40 degrees, allowing them to withstand significant axial loads. Angular contact ball bearings have a non-separable design, with shoulders of different heights on both sides of the inner and outer rings. To improve load capacity, one shoulder is machined lower to allow more steel balls to be installed. 2) Double-row angular contact ball bearings can withstand combined radial and axial loads, primarily radial, as well as moment loads, and restrict axial displacement of the shaft in both directions. They are mainly used in components that restrict bidirectional axial displacement of the shaft and housing. The tilting capability between the inner and outer rings of double-row angular contact ball bearings is limited. The allowable inclination angle depends on the internal clearance, bearing size, internal design, and forces and moments acting on the bearing. The maximum allowable inclination angle must ensure that no excessive additional stress is generated within the bearing. If there is an inclination angle between the inner and outer rings, it will affect bearing life, reduce operating precision, and increase operating noise. Double-row angular contact ball bearings generally use nylon cages or solid brass cages. During installation, note that although the bearing can withstand bidirectional axial loads, if one side has a filling slot, ensure that the main axial load does not pass through the raceway edge with the filling slot. During use, ensure that the raceway without the filling slot bears the main load.

STORZ bearing features

1) Universally matchable bearings are specially processed so that when installed adjacent to each other, any combination achieves the specified internal clearance or preload and average load distribution without using shims or similar devices. Paired bearings are applied when the load carrying capacity of a single bearing is insufficient (using tandem configuration) or when combined loads or axial loads in two directions must be withstand (using back-to-back or face-to-face configurations). Basic design bearings (not suitable for universal matching) are used for single bearing configurations. Basic design single-row angular contact ball bearings are mainly applied in configurations with only one bearing per position. Their width and protrusion are of normal tolerance class. Therefore, they are not suitable for installing two single-row angular contact ball bearings adjacent to each other.

STORZ bearing installation

High-speed precision angular contact ball bearings are mainly used in high-speed rotation applications with light loads, requiring high bearing accuracy, high rotational speed, low temperature rise, low vibration, and a certain service life. They are often installed in pairs as support components for high-speed motorized spindles and are key matching components for the high-speed motorized spindles of internal grinding machines. The Kuaiyiyou Automation Selection Guide for angular contact ball bearings provides selection assistance. Angular contact ball bearings can be installed in three configurations: back-to-back, face-to-face, and tandem arrangement. In back-to-back installation (with the wide ends of the two bearings facing each other), the contact angle lines of the bearings diverge along the axis of rotation, increasing radial and axial support stiffness and providing maximum resistance to deformation. In face-to-face installation (with the narrow ends of the two bearings facing each other), the contact angle lines converge toward the axis of rotation, resulting in lower support stiffness. Since the inner ring extends beyond the outer ring, when the outer rings of the two bearings are pressed together, the original clearance of the outer rings is eliminated, allowing an increase in the bearing preload. In tandem arrangement (with the wide ends of the two bearings oriented in the same direction), the contact angle lines are parallel and oriented in the same direction, enabling the two bearings to share the working load in the same direction. However, when using this installation configuration, to ensure axial stability, two sets of tandem-arranged bearings must be mounted opposite each other at both ends of the shaft.

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