Thrust self-aligning roller bearing

Thrust self-aligning roller bearings are single-row, self-aligning roller bearings. They consist of an axial ring, a raceway ring, and asymmetric barrel rollers with a cage. The cage holds the roller and cage assembly together with the axial ring. The outer ring is separable, so the inner and outer rings can be installed independently.

Thrust self-aligning roller bearings are spherical bearings with an inner diameter ranging from 60mm to 1120mm and an outer diameter ranging from 130mm to 1460mm. They are primarily used in applications such as oil rigs, iron and steel manufacturing machinery, hydroelectric generators, large lifting hooks, extrusion machines, and preheaters. The raceway surface of their seat rings adopts a spherical design centered around the bearing's central axis, featuring self-aligning capabilities. These bearings can withstand high axial loads and radial loads up to 55% of the axial load.

The bearing is divided into 200, 300, and 400 series according to the diameter, corresponding to self-aligning angles of 1°~3°. It is usually lubricated with oil, and the cage includes two types: solid brass cage and stamped cage. The improved structure includes components such as connecting rings, fixed shafts, rollers, and thermal expansion and contraction springs. It achieves automatic lubrication through the cooperation of elastic telescopic rods and sealing blocks, and adopts a hollow support cage assembly to increase the number of rollers to enhance the axial load capacity. During installation, it is necessary to avoid interference fit to ensure uniform distribution of contact angles, and the axial clearance can be adjusted by adjusting nuts or shims. Ribs are set on both sides of the inner diameter of the shaft ring to contact the roller end face, effectively limiting radial runout.

Technical advantage

Rocke adheres to the DIN620 standard, ensuring an excellent fit between the roller and the raceway of the ring, allowing the bearing to withstand heavy axial loads while also enduring certain radial loads. The contact between the roller end face and the rib has been optimized, enabling it to maintain low levels of heat generated by friction even at high speeds.

Application areas: metallurgy, pulp and paper, petroleum, shipbuilding, mining, steel rolling, and general machinery equipment.