Three Row Roller Slewing Bearing


Three Row Roller Slewing Bearing

The three-row roller slewing bearing has three rings and three raceways, so it can simultaneously withstand high axial, radial, and overturning moments. It is the bearing capacity and diameter of all types of slewing bearings with the largest. Therefore, this type is usually considered for heavy machinery requiring large rotary bearings, such as tire cranes, port cranes, and other mining heavy equipment. It can be designed and produced according to the special requirements of customers.

Three-Row Roller Slewing Bearing Features:

It is generally used on heavy machinery that requires a larger diameter. However, once this product has quality problems, the maintenance or replacement cost is very high.

Therefore, within the specified service life, our manufacturers must ensure that the products do not have any quality problems.

For this reason, our company controls the quality of the raw materials. The material recommends customers choose 42CrMo, and it must be quenched and tempered.

During the production process, we will strictly inspect the product clearance and raceway processing to ensure that it is qualified before leaving our factory.

Three-Row Roller Slewing Bearing Specification:

How Does A Slewing Support Work, And What Are Its Components?

Two concentric rings form the main structure of the slewing support. The outer ring is usually laid flat on a stationary surface and tightened into place through evenly distributed mounting holes. The inner ring is usually fixed to the rotating object using a transfer plate or bracket. It usually moves in a rotational manner while the outer ring remains fixed to the mounting surface.

The relative rotation between the rings is facilitated by rolling or sliding elements. For slewing supports that operate with ball bearings, include components that facilitate system lubrication, such as seals, load plugs, grease joints, and taper pins. A replaceable plastic lining is located between the inner and outer rings for slewing supports based on sliding elements.

Because ball bearing-based slewing supports have tiny contact points (ball bearings touching the inner and outer ring surfaces), they can move with very low friction.

Slewing supports based on plastic linings to promote movement (with a larger inner ring surface to better handle heavier loads) are more suitable for flat horizontal applications. Vertical applications are more suitable for slewing bearings based on ball bearings.

Both slewing bearing types can include gears on the outer ring OD or inner ring ID to meet different application requirements.