What is cross cylindrical roller Slewing Bearing

Cross roller slewing bearings can simultaneously withstand axial loads, overturning moments, and radial loads. The structure and application of cross roller slewing bearings are basically the same as those of four point contact ball slewing bearings, except that the rolling element changes from a steel ball to a roller, and the contact between the rolling element and the inner and outer rings changes from point contact to line contact. Therefore, the bearing capacity will increase, but the wear and friction torque will increase.

The cross roller slewing bearing structure mainly consists of inner ring, outer ring, single row cross placed rollers, cage (isolation block), sealing device and other parts.

The cylindrical rollers (axis) of the cross roller slewing bearing are distributed in a cross pattern on the raceway, and the aspect ratio of the cylindrical rollers is less than 1. The rollers exhibit slight sliding during movement.

Features of cross cylindrical roller Slewing Bearing

1. Cross cylindrical roller slewing bearings can cope with different axial forces, overturning moments, and radial force combinations generated under various working conditions by adjusting the number of roller intersections and contact angles.

2. The inner or outer rings of cross cylindrical roller rotary bearings can be divided into integral and split structures. To reduce friction between rollers, cages or isolation blocks are usually designed.

3.  The accuracy level that cross roller slewing bearings can achieve is much higher than that of ordinary slewing bearings, and the radial and axial runout that can be achieved is much higher than that of ordinary slewing bearings.

4. The rigidity of the cross roller slewing bearing is much greater than that of ordinary slewing bearings, and the operating noise is lower than that of the cross roller bearing. Therefore, in a low noise working environment, it is better to choose the cross roller slewing bearing.

5. In terms of structure, compared to ordinary rotary table bearings, cross roller rotary table bearings have a relatively simple structure. By arranging a row of cylindrical rolling elements intersecting with each other on a single raceway, significant bearing axial and radial bearing capacity and overturning torque can be obtained. However, ordinary rotary table bearings must be arranged in sequence on three rows of cylindrical rolling elements to achieve the same effect. In this way, the cross roller slewing bearing takes up much less space and is lighter in weight compared to ordinary three row roller slewing bearings.

Material of cross cylindrical roller Slewing Bearing

LZTC slewing bearing accuracy covers four levels of Po, P6, P5 and P4. implementation standards: universal bearing GB/T307, slewing bearing JB/2300, ship industry CB/T3669, machinery industry JB/T10471, wind turbine bearing B/T10705. The SO9001 quality system certification has been passed in 2003.

Range of external diameter: 100 mm to 70000 mm

Ring material: 42CrMo / 50Mn/ C45

Ball/roller material: GCr15

Cage material: steel 20 or ZL102 cast aluminum alloy

Spacer material: nylon 6 / nylon 66

Quenching hardness of raceway: HRC55-62

Tooth type: no gear, internal gear, external gear

Delivery type: 30-60 days

Application of cross cylindrical roller Slewing Bearing

Cross roller slewing bearings are often used in large rotary devices such as bucket wheel machines, overweight transportation machinery, port machinery, mining machinery, park amusement machines, filling machines, construction machinery, and missile launchers, playing a very important role in helping engineering machinery products.

Supplier of cross cylindrical roller Slewing Bearing

LTZC Bearing is a professional slewing bearing manufacture with following main Products. Slewing Bearing, Large Size Non-standard Precision Bearing, Ladle Turret Slewing Bearing Shield machine bearing series, Rolling Mill Bearing.

The main products of LTZC BEARING are slewing bearing, non-standard precision bearing, rolling mill bearing, unit assembly related to bearing, Oversize Precision Rail. The product processing range is outer diameter: 200 mm - middle 10000 mm.