The isolation roller inside the slewing ring raceway is also called the isolation block

The isolation roller inside the slewing ring raceway is also called the isolation block, which is made of two materials: engineering plastics and metal.

The role of the spacer in the slewing ring has exceeded the role of keeping, isolating and guiding the normal rotation of the rolling element, and is developing a new role of using the spacer to supply oil for lubrication. With the increase of bearing speed, metal cages with high density can no longer meet the requirements of bearings, but the density is only 1/4~1/8 of metal. Plastics with unique advantages such as wear resistance, earthquake resistance, magnetic resistance, radiation resistance, corrosion resistance and low friction have entered the ranks of rotary bearing isolation block materials.

The spacer is used in the slewing ring raceway to isolate the slewing ring sphere. The utility model has two cylinder structural blocks whose end faces are ball sockets, the axial direction of the cylinder structural blocks is provided with through holes, and the ball sockets are provided with oil grooves. The middle is hollow or net type. At present, the main use is network type. There are 8-12 reinforcements in the middle. On the one hand, raw materials for manufacturing spacer blocks are saved; On the other hand, improve the mechanical strength of the spacer; On the other hand, the manufacturing accuracy of the spacer is further guaranteed.

The selection of slewing bearing isolation block shall be based on the operating conditions and lubrication methods. Generally speaking, only the integral retainer can be used for vertical installation. Engineering plastic isolation blocks (such as PA6, PA66, etc.) can be used for horizontal installation with light load. Copper alloy isolation blocks are generally used under heavy load, plastic isolation blocks are generally used for grease lubrication, and copper alloy isolation blocks are generally used for oil lubrication.