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Precise thin wall bearing with constant section

About us
Strong research and development, we do everything in detail

Luoyang Lirui Bearing Co., Ltd. has professional design, research and development of high-precision, high-performance, high-quality bearing products, precision bearings, replacement of imported bearings and special bearings

Military technology, the choice of the world, get customer praise

Thin wall bearing has a wide range of application space, it can also save installation space, reduce weight, significantly reduce friction, and provide good rotation accuracy. The use of Thin-walled bearing can reduce the external size of the design. The product has the advantages of high rigidity, small cross-section, good bearing performance and various cross-section sizes, and can solve many conventional problems

Improve intimate after-sales service, serve every customer

Every product that Lirui sells will be visited regularly. Our company is good at dealing with some practical problems. We have a sound management and service system to satisfy every customer

Luoyang Lirui Bearing Co., Ltd, located on the ancient capital city Luoyang which is the production base for bearing, is a new-high technology corporation with the integration of design, research and development, manufacturing. Our company, based not only on the development of China’s bearing, but also the global perspective has first-class team of bearing experts and engineers, the domestic first-class CNC grinding, automatic equipment, and large-scale sophisticated equipment, all of these guarantee our bearing with high precision and stability.Our company has been found in 2008 since the establishment, we inherit "honest and trustworthy, the user orientated", adhere to high quality pre-sales technical support, superior product quality coupled with excellent after-sale service to serve every customer. We are specialized in the design, research and production to various non standard bearing, imported substitution bearing and special bearing, which are widely applied to aerospace, precision instruments, textile, precision lathe, port, mining, medical treatment, coal, cement, oil drilling, wind power generation, industrial robots, defense industry and other fields. Our products are exported to, Canada, Germany, the United States, Austria, Italy, Japan, South Korea, Singapore, Pakistan, Thailand, Malaysia and other countries.We have got ISO9001:2000 certificate, as it is represented in “Quality Guideline”, Lirui bearing focus on comprehensive quality management, and take it as a sustained effort to improve customer satisfaction. These require our team including senior management take on-the-job training and further education. At the meantime, it is necessary to establish full assessment to ensure this goes smoothly in this area. The company gradually forms a stable country and worldwide sales network. Each product reflects constant pursuit of excellence of Lirui employees, and serves our customers by qualified products and business philosophy of "innovation, integrity and pragmatic, development". Creating value for customers and guarantee satisfaction to the customers are our principle, thus, we sincerely welcome our friends from all over the world come to discuss, exchange and cooperation, and with our joint hands to create a bright future.



Lirui Bearing makes outstanding contributions to national military industry

Accurately grasp the market positioning of thin-walled bearings with equal section, Larry Bearing continues to develop. The production of the forward bearing industry is complex and orderly. The complexity of the production of the bearing industry is manifested in the production of thin-walled bearings of equal section covering almost all products of the commodity industry. The production of bearings is very large, and the production of so many products is complex. The orderly production of the bearing industry is manifested in the production of thin-walled bearings of equal section. The thin-walled bearings of equal section can be classified. The production of ordinary bearings is a major classification of the bearing industry. It is used by thin-walled bearings of equal section. There are many different types of equipment. Here, the equal-section thin-walled bearings, the thin-walled bearings of the same section produced by Luoyang Lirui Bearing have been the national unit, China Nuclear Power Equipment, Nanjing 81 Research Institute, Beijing Institute of Electronics, China Heavy Industry VII Institute, optoelectronic equipment and many more. It has made outstanding contributions to the country. 80% of Larry products are used for bearing products of different raw materials for military industry. Different production performances are divided into several types of thin-walled bearings of equal section. The thin-walled bearings of equal section have been well received by the market and have been recognized by the market. The industrial development of contemporary society has been continuously improved, and the productivity has been further improved. The production of advanced thin-walled bearings of equal section is of course also in line with the development of the times, and more people know that industrial production is used in the production of thin-walled bearings of equal section. At the same time, it is more inclined to have a relatively high degree of modernization of equal-section thin-wall bearing equipment. While paying attention to quality, people also began to pay attention to the improvement of production efficiency. By achieving these two standards, they can be rated as the most popular precision bearings.


Thin wall bearing installation size

Installation of rolling bearing Inspection of shaft and housing hole Rolling bearing should be rigorously inspected before the installation, such as shaft, housing hole, end cover, etc. The shaft and the housing hole should be tested for overall accuracy. The parts that are not required should be repaired or replaced. Otherwise, assembly is not allowed. Inspection of the shaft to check the eccentricity of the journal, bending and diameter variation (ellipticity) to top the shaft on the top of the lathe, or on a cast iron plate supported by a V-shaped iron, with a dial gauge pointer in contact with the bearing The journal, then slowly rotate the shaft to observe the swing of the dial indicator on the journal. If the shaft rotates once, the pointer only swings in one direction and then returns to the original position. This means that the shaft is eccentric or curved, and the eccentricity and the amount of bending are half of the swing value of the dial indicator; if the shaft rotates for one week, After the sub-table pointer swings twice, it returns to the initial position, indicating the journal ellipse. The difference between the maximum value and the minimum value of the dial gauge pointer index is the ellipticity value. When the eccentricity and curvature of the shaft are greater than the specified value, the shaft should be aligned or milled. The ellipticity value should generally not exceed 1/2 of the journal size tolerance. If it is too large, it should be welded, car, and ground for repair. When testing the surface roughness of the journal, if there are burrs or bumps on the journal, it should be finely smashed and then polished with a fine abrasive cloth. Verify the verticality of the shoulder of the journal and the fillet radius of the shoulder of the shoulder. The verticality of the shoulder is close to the shoulder with a square to make it close, and then the light or sunlight is checked, such as light leakage or no light leakage. The shoulder is vertical. The fillet radius at the root of the shoulder can be verified with a rounded pattern. If the fillet radius is too large, the bearing and the shoulder are not tight, which may cause vibration during use; if the fillet radius is too small, the strength of the shaft is affected. Therefore, the radius of the fillet at the root of the shoulder must be smaller than the radius of the fillet of the inner ring of the bearing. Generally, it should be 1/2 of the radius of the inner ring of the bearing to ensure that the bearing abuts the shoulder. Verify that the journal size can be verified with a micrometer or dial gauge. When the journal wear is severe, the size is less than the specified fitting requirements, and the bearing inner diameter is loose, the bearing neck should be repaired. There are four general repair methods: inserts. When the journal is thicker (greater than 40mm), the journal can be turned off by 10-15mm, then the prepared sleeve is placed in the hot oil to be heated, and the sleeve is placed on the thin journal of the car by the hot fitting method. The outer diameter of the insert is finished to meet the requirements for matching the inner diameter of the bearing. Weld repair. First, rough the grinding of the journal, and turn it off 0. 3-0. 5mm. Then use gas welding or electric welding to repair the welding. After the welding, the journal car is ground to the specified size on the machine. In order to prevent bending deformation of the shaft during repair welding, a symmetrically balanced re-welding method for reverse deformation can be used for welding. Chrome and low temperature iron plating. When the journal size is worn lightly, or the ruler exceeds the difference after the machining, it can be repaired by first grinding and grinding. Knurling is eye-catching. When the journal size is slightly worn or the machining is slightly out of tolerance, you can use the sample to punch a small number of small holes on the circumference of the journal, increase the size of the journal by the convex super-extension of the edge of the small hole, or use knurling on the lathe. The knife is aligned with the journal knurling to increase the journal size and fit with the bearing for installation. This method can only be used as a temporary emergency measure and should generally not be used.


The effect of the check of the angular contact ball bearing on the use

The shaft parts of the machine tool, especially the main shaft, are generally assembled with the thrust ball bearing and rotate at a high speed, sometimes generating high heat. If this phenomenon is not eliminated in time, it will cause the angular contact ball bearing to overheat and cause the temperature of the corresponding part of the machine tool to increase and cause thermal deformation. In severe cases, the spindle and the tailstock will not be equal, which not only affects the precision and machining accuracy of the machine tool itself. And will burn the bearing. Rated fatigue life refers to the operation of a group of bearings of the same type under the same conditions. 90% of the angular contact ball bearings do not have the total number of revolutions caused by rolling fatigue. When the speed is constant, the total running time is used to indicate the rated fatigue life. When studying the life of a thrust ball bearing, it is not only possible to consider the fatigue life, but also to consider the performance of the bearing and combine several use limits. For example, the grease life of grease lubricated bearings. Since the noise life, the wear life, and the like vary depending on the application, the use limit is different, and therefore, the experience limit is often selected in advance. Therefore, it is difficult to know the true cause of the damage by investigating only the angular contact ball bearing damage. However, if you know the use of the thrust ball bearing machinery, the conditions of use, the structure around the bearing, and understand the situation before and after the accident, combined with the damage state of the bearing and several reasons, it can prevent similar accidents from happening again. The judgment of the availability of angular contact ball bearings is mainly based on the degree of bearing damage, mechanical properties, importance, operating conditions, and the period of the next inspection. If you have the following defects, you can no longer use them. You must replace the new thrust ball bearings. There is a crack or a gap in any of the inner ring, the outer ring, the rolling element, and the cage. Wear failure is one of the common failure modes for all types of bearings. It is usually classified into the most common abrasive wear and adhesive wear in terms of wear. 1. Oil film resistance diagnostic technology Features: The same evaluation criteria can be used for different working conditions. It has a poor diagnostic effect on abnormalities such as surface peeling, indentation, and cracks. Application: Suitable for applications where the rotating shaft is exposed. 2.Vibration diagnosis technology Features: Vibration diagnosis technology is widely used; online monitoring can be realized; diagnosis is fast, and diagnostic theory is mature. Scope of application: Particularly suitable for fault monitoring of angular contact ball bearings in rotating machinery. 3.Metal Spectrum Diagnosis Technology Features: The machine does not need to be disassembled; the investment is low, the effect is good; the early fatigue failure of the oil-free bearing can be found; the wear mechanism can be studied. Scope of application: For the diagnosis of angular contact ball bearings lubricated with lubricating oil, it is difficult for grease-lubricated bearings. 4. Temperature diagnostic technology Features: Simple diagnosis; better judgment on bearing burns. Scope of application: Simple routine diagnostics for bearings in machines. 5. Fiber-optic monitoring and diagnostic technology Features: High sensitivity of fiber-optic displacement sensor; direct extraction of signal from oil-free bearing surface, improved signal-to-noise ratio; direct reflection of angular contact ball bearings Manufacturing quality, surface wear, load, lubrication and clearance. Application: Suitable for machines where the sensor can be mounted in a housing. 6. Acoustic emission diagnostic technology Features: Quick and easy diagnosis; online monitoring. Scope of application: New technologies developed in recent years have been used less in bearing condition monitoring. When taking oil-free bearings directly by hand, wash off the sweat on your hands and apply high-quality mineral oil before handling. Pay special attention to rust prevention during the rainy season and summer. Under certain special operating conditions, angular contact ball bearings can achieve longer life than conventional calculations, especially at light loads. These special operating conditions are when the rolling surfaces (tracks and rolling elements) are effectively separated by a lubricating film and the surface damage caused by contaminants is limited. In fact, under ideal conditions, the so-called permanent bearing life is likely to not allow strong stamping, does not allow the hammer to directly hit the bearing, and does not allow pressure to be transmitted through the rolling elements. When the angular contact ball bearing rotates, the raceway surface of the inner ring and the outer ring is in rolling contact with the rolling element, the running track is a dark surface, and the running track attached to the raceway surface is not abnormal. Therefore, the load condition can be known, so when disassembling the oil-free bearing, please pay close attention to and observe the running track of the raceway surface.


2018 Spring Festival holiday notice

Dedicated user units; Hello everyone, Company holiday time; February 13th, 2018 to February 25th, 2018, 12 days off, February 24 On Monday (the first tenth), I will go to work normally. I wish you all a happy new year and a happy family, hereby inform you.


The use of equal-section thin-walled bearings

Luoyang Lirui Bearing Co., Ltd. is a professional manufacturer of thin-walled bearings with equal section and some large-scale, medium and small high-precision thin-walled ball bearings of the same size. The previous machine tools used too thick and occupied a large space. Nowadays, the modified thin-walled bearings with the same section can save space for installation. Luoyang Lirui Bearing Co., Ltd. is a professional manufacturer of thin-section precision ultra-thin spheroidal bearings. The thin-section thin-walled ball bearings of our company consist of seven open series and five. A series of seals with inner bore diameters from 1" to 40" and cross-section sizes ranging from 0.1875X0.1875" to 1.000X1.000", three types: deep groove ball, angular contact, four-point contact Available in Gcr15 and stainless steel. Specializing in the production of imported bearings, Luoyang Lirui Bearing (LRZ) has been the equipment manufacturing plant of China Nuclear Power Research and Design Institute, Guangzhou CNC Machine Tool Plant, Beijing Aerospace Control Instrument Research Institute, Changsha Automation Equipment Research Institute, Tianjin Seven High-tech The Institute, Nanjing 841 Research Institute, Xi'an Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Weihai Huadong Numerical Control Co., Ltd., and other units have achieved the international product substitution and won unanimous praise.


LRZ equal section thin-wall ball bearing technology has made breakthrough progress

Thin-walled ball bearings of equal section, also called flexible bearings, have incomparable advantages such as thin wall, light weight, strong bearing capacity and high precision. They are especially suitable for aerospace, military, medical and other requirements and installation space. Limited, requiring a small size and light weight, it has a wide range of applicable space. Isometric thin-walled ball bearings are another major product of Luoyang Lirui Precision Bearing Co., Ltd. (LRZ) in addition to high-precision thin-walled cross-roller bearings. The production process of equal-section thin-walled ball bearings is very difficult and is the most difficult one in bearing technology. Equal-section thin-walled ball bearings are currently produced by only a handful of companies worldwide, capable of producing from 1 inch (25.4mm) inside diameter to 60 inches (1524mm) inside diameter, with cross-section widths from 0.187" (4.7625mm) to 1". (25.4mm) There are only two or three companies in full-size and full-size thin-walled ball bearings. LRZ is one of them, and it is the only company in mainland China that can produce full-size, full-size and thin-section thin-walled ball bearings. After years of exploration, summarization and accumulation, LRZ has perfected the development and production process of the complete set of thin-walled ball bearings of equal section, especially in the production process with rich and advanced technological concepts. In the second half of 2011, with the expansion of the maximum internal diameter of the equal-section thin-walled ball bearings produced by LRZ from 40 inches to 60 inches, the domestic largest isometric thin-walled ball bearings with a section width of 1 inch were successfully rolled off, indicating that LRZ has fully mastered The design and production technology of a full range of large-diameter thin-walled ball bearings, marking LRZ's first full-scale, full-size product design and production capacity in the field of equal-section thin-walled ball bearings, once again stood up for special bearings such as thin-walled ball bearings of equal section The commanding heights of the field also marked a breakthrough in the design and production capacity of domestic special bearings.