Single Direction Thrust Spherical Roller Bearing

A key benefit of this series is its built-in self-aligning function. The curved profile of the rollers, together with the spherical seat on the housing washer, automatically accommodates small angular errors between the shaft and the housing. This reduces stress buildup caused by mounting misalignment, shaft bending, or thermal expansion, helping maintain even load distribution across the roller set. These bearings perform especially well at low to medium speeds where perfect alignment is difficult but strong axial rigidity is essential.

● Strong Axial Load Capacity: Designed with closely arranged spherical rollers to handle heavy one-way thrust loads, commonly used in crane hooks, hoists, and other heavy machinery.
● Self-Aligning Ability: The roller and raceway geometry can compensate for misalignment up to 2°–3°, lowering wear and reducing maintenance requirements.
● Long Service Life: Crowned roller profiles reduce friction and heat buildup, while accurately finished raceways ensure even wear over time.
● Separable Design: Shaft washer, housing washer, and roller-cage assembly can be handled and mounted individually, making on-site installation and maintenance simpler.
● High Axial Stiffness: Provides stable thrust support without unwanted radial movement, suitable for extruders, gearboxes, and hydraulic presses.

ZWZ single direction thrust spherical roller bearings are manufactured according to national and international standards:

● Standards: GB/T 307.4 and ISO 104, with tolerance classes including P0 (standard), P6, P5, and P4 for precision applications.

● Size Range: Bore diameters from 60 mm up to 1500 mm, covering most heavy industrial applications.

Cage Materials:

● Brass machined cages: standard for medium-size bearings (outer diameter ≤ 500 mm)

● Steel solid cages: used for larger bearings (outer diameter > 500 mm) for improved strength

Load Ratings:

● Equivalent dynamic load: P = Fa

● Equivalent static load: P₀ = Fa

These bearings are widely used in heavy industry where reliable one-way thrust support is required:

● Crane hooks, winches and lifting equipment

● Heavy-duty gearboxes and speed reducers

● Extrusion and plastic processing machinery

● Hydraulic presses and forming equipment

● Mining and metallurgical machinery

● Turbines and power generation components