Rotary table bearing is a kind of medium and large sized bearing with special structure that can bear large axial load, radial load and overturning moment.

In general, the rotary table bearing itself is equipped with mounting holes, lubricating oil holes and sealing devices, which can meet the different needs of various hosts working under different working conditions; On the other hand, the rotary table bearing itself has the characteristics of compact structure, convenient guide rotation, simple installation and easy maintenance, and is widely used in medium and large rotary equipment such as lifting and transportation machinery, metallurgical machinery, mining machinery, construction machinery, port machinery and automatic assembly line.

PRS rotary table bearing can be divided into four point contact ball rotary table bearing, double row reducing diameter ball rotary table bearing, cross cylindrical roller rotary table bearing and three row cylindrical roller combined rotary table bearing according to different structural forms; The above types of bearings are divided into toothless, external and internal toothless structures according to whether they are provided with teeth or not and where the teeth are distributed.

According to different structural characteristics, the rotary table bearing can meet the requirements of the working host under different load conditions. Among them, the four point contact ball turntable bearing has a high dynamic load capacity, the cross cylindrical roller turntable bearing has a high static load capacity, and the three row cylindrical roller combined turntable bearing has the characteristics of making the main engine more compact because it leads the increase of the load capacity to the height direction of the bearing, and various loads are borne by different raceways and roller groups, so under the same stress conditions, the diameter of the bearing can be greatly reduced, It is a rotary table bearing with high load capacity.

Code representation of rotary table bearing String 6

1、 Composition of code

The bearing code consists of basic code and post code.

2、 Composition of basic code

The basic code is divided into three parts, the front part is the structure type and transmission type code, the middle part is the rolling element diameter (for bearings with more than two rows of rolling elements, it is the large rolling element diameter), and the rear part is the rolling element circle diameter (for bearings with more than two rows of rolling elements, it is the large rolling element circle diameter)

1. The structure type code shall be in accordance with Table 1.

01 Four point contact ball bearing 02 Double row reducing ball bearing 11 Cross cylindrical roller bearing 13 Three row cylindrical roller combined bearing

2. The transmission type code shall be in accordance with Table 2.

0 Toothless 1 Involute cylindrical gear external tooth smaller module 2 Involute cylindrical gear external tooth larger module 3 Involute cylindrical gear internal tooth smaller module 4 Involute cylindrical gear internal tooth larger module 3 Basic code compilation rules When the basic code is arranged, the structure type code and transmission type code are linked, and the front, middle and rear are separated by ".".