What's the four characteristics of cross cylindrical roller bearings?

Crossed cylindrical roller bearing can be widely used in machine tool precision rotary indexing  table, vertical and horizontal boring machine, vertical grinding machine, rotary surface grinding  machine, large gear hobbing machine, guns and rotary table, large radio and optical telescopes,  rotating camera, steering pivot and continuous casting machine, highly restricted pivot  microscope platform, pole center axis, bogie, welding stents, turning assembly fixture,  industrial robots, precision rotary worktable, medical apparatus and instruments, measuring  instruments, IC manufacturing equipment and so on.

1. Excellent rotation accuracy
The crossed roller bearings internal structure by roller are arranged 90 ° vertically cross each  other, with intervals between roller device or isolation, can prevent roller friction between  roller tilt goods, effectively prevent the rotation torque increases.In addition, the party will  not have roller contact or lock phenomenon;

The non-standard cross roller bearing can adjust the clearance because the inner and outer rings  are segmented, and the high precision rotary motion can be obtained even when the preload is  applied.

4-point thin wall bearing help you achieve the design high performance, low cost

Internal coordination and anti-corrosion requirements:
Thin-walled four-point contact ball bearings can improve internal coordination and meet the  desired performance requirements.The bearing with preloaded is used for high stiffness and the  bearing with radial clearance is used for low friction torque

In addition, standard cross roller bearings usually have no corrosion protection and are used in  extreme environments for custom sealing, special application grease and high temperature  adaptation.

Plating
According to the super-strong anti-corrosion requirements, the thin and tight chromium coating  can be provided to endow AISI440C with stronger anti-corrosion capability.Unlike many  conventional chromium plating, the coating does not peel or flake off under pressure, thus  maintaining corrosion resistance and minimizing wear.The properties of the coating have been  demonstrated in key military, aerospace and deep space applications.

What's the slewing bearing performance and characteristics?

Slewing ring bearing is a kind of large bearing which can bear the combined load of large axial load, radial load and overturning moment at the same time.Generally, the swing bearing itself is equipped with mounting holes, lubricating oil and sealing devices, which can meet the different demands of various hosts working under various working conditions.On the other hand, the turntable bearing itself has the compact structure characteristics, easy to guide rotation, simple installation and easy maintenance, which is widely used in large slewing ring such as lifting transport machinery, extractors, construction machinery, port machinery, wind power generation, medical equipment, radar and missile launcher.

Swing ring usually consists of four parts, including inner ring, outer ring, rolling body and isolation block.As the core part adopts slewing bearing, it can bear axial force and radial force at the same time.It has many forms, but its structure is basically the same.

3 factors let you know which factors affect the slewing bearing service life?

The main factors influencing the slewing bearing service life are structural design, manufacturing process and materials.

First of all, the slewing bearing structure design is reasonable, so that the swing bearing has a good life.slewing bearing is after forging, heat treatment, turning, grinding and assembly, and other processes.The rationality, progressiveness and stability of each machining process also affect the slewing bearing life.

How to judge if the bearing can be used again?

"Inspect the bearings that have been removed from the equipment during regular maintenance, operation inspection and peripheral parts replacement to determine whether they can be used again or whether the condition is better than bad.The bearing and appearance of the disassembled bearing should be carefully investigated and recorded."

Secondly, check if the raceway surface, rolling surface and mating surface, as well as the wearing state of the cage are damaged or abnormal.

To determine whether the bearing can be used again, it shall be decided after considering the degree of bearing damage, machine performance, importance, operating conditions, inspection period, etc.Check the results, if the bearing has damage and abnormal conditions, the contents of the damage section to find out the cause and develop countermeasures.In addition, the inspection result shows that if there are the following defects, the bearing can not be used again, and a new bearing needs to be replaced.

FRB Introduction of YRT series high precision rotary table bearing

As an important part of machine tool, rotary table bearings has always been the focus of machine tool design.As a key part of the workpiece, the rotary table bearing precision、rigidity and composite bearing capacity directly influence the machine tool processing performance.The choice of bearing plays a direct and decisive role.Traditional solution of the turntable bearings generally use two or more than two sets of radial and thrust bearings, the purpose is to make the turntable can also carry axial load, radial load and tilting moment, although this solution is mature, but there are also such as turntable structure design of complex, shortcomings and so on bearing inconvenient installation and maintenance.

Research and treatment method of bearing damage for vibrating screen in mining machinery equipment

Dynamic screen is a common equipment in mining machinery, and its vibration is mainly realized by exciter.The exciter forms are diverse, and the widely used eccentric-block external structure has the characteristics of light weight, compact structure, lubrication concentration of transmission parts, convenient maintenance and low manufacturing cost.However, there is a general problem in this structure, that is, the bearing life in the exciter is short, and the bearing heating and burning loss often occur, which seriously affects the normal operation of the vibrating screen.

The operating condition of the exciter is harsh, not only the environment humidity is large, the dust is much, the speed is high (750~1400r/min), and there is a strong vibration impact.After practical experience, the main bearing damage is: