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LRZ crossed roller bearing

LRZ/Luoyang Lirui Bearing Co., Ltd. specializes in producing THK/IKO/NSK Germany INA precision cross roller bearing THK bearing RA series, RAC series, RB series, RE series, IKO bearing CRBS series, CRB series, CRBC Series, CRBH series NSK bearing NRXT series, Germany INA bearing SX series. Tel: 0379-64907522 Fax: 0379-62692655 E-mail: 1245028816@qq.com Website: www.lylrzc .com


Larry Bearings helps you understand the type of thin-walled bearings with equal sections

Luoyang Larry Bearing Co., Ltd.'s isometric thin-walled bearings are made up of seven open series and five sealed series, with inner diameters ranging from 1 inch to 20 inches, and cross-section sizes ranging from 0.1875X to 0.1875 inches. To 1.000X 1.000 inches. There are three types of open bearings: radial contact (L type), angular contact (M type), and four point contact (N type). There are only two types of sealed bearings: radial contact (L-shaped) and four-point contact (N-type). The thin-walled bearings produced by our company are different from the standard bearings. In thin-walled bearings, the cross-sectional dimensions in each series are designed to be fixed values, and the dimensions in the same series are constant. Does not increase with increasing inner diameter size. Therefore, this series of thin-walled bearings, also known as equal-section thin-walled bearings, allows designers to standardize the common parts associated with them. With large bores, thin-walled bearings with small cross-sections can use large diameter hollow shafts, such as air, water pipes, and wires that can be supplied through hollow shafts for a simpler design. Thin-walled bearings save space, reduce weight, significantly reduce friction, and provide good rotation accuracy. Without thin-wall bearings, the design can be reduced without affecting bearing performance and service life. External dimensions and reduced production costs. In 2006, the series of thin-wall bearing products of the same section won the National Torch Plan project commitment unit, and was supported by the National Science and Technology Innovation Project in 2008.


Type and use of equal-section thin-wall bearing retainers

Thin-walled bearings of equal section: Thin-walled ferrule bearings are highly accurate, very quiet and have a high load carrying capacity. These ball bearings are available in three designs and are extremely small and mostly square in cross section. In these series, even with larger shaft diameters and bearing bores, the cross section remains the same. These bearings are therefore referred to as equal sections. Isometric thin-walled ball bearing retainer is a precision non-standard thin-walled ball bearing retainer consisting of seven open series and five sealed series with inner bore diameters from 1" to 40", cross-sectional dimensions The range is from 0.1875X0.1875 inches to 1.000X1.000 inches. Three types of thin-walled bearings of equal section: deep groove ball type (C), angular contact type (E), four point contact type (X). Thin-walled bearings of equal section are made of copper, stainless steel, alloy steel, etc. Thin-walled bearings of equal section are mainly used in: bearings for robotic joints, high-precision thin-wall bearings for aerospace, and large bearings for wind turbines, which require high-precision and small space.


Four steps in the production of imported bearing rings

1. Forging: If the over-burning, overheating, and internal cracking into mesh carbides occur during the forging process, the toughness and strength of the ferrule will be reduced. Therefore, the processing temperature, circulating heating and post-forging heat dissipation conditions (such as spray cooling) must be strictly controlled. Especially after the final forging of larger varieties of ferrules, the temperature should be above 700 °C, and should not be stacked. 2. Heat treatment: Close monitoring of heat treatment equipment is an important task in the workshop. Monitor the reliability of the equipment. Important temperature control devices such as instruments and thermocouples must be closely monitored to ensure accurate and reliable measurement data; timely replacement of errors exceeding the standard is strictly prohibited. 3. Monitoring of the grinding process. Finished bearing ferrules are not allowed to have abrasive burns and grinding cracks, especially on the mating surface of the inner ring taper. If the ferrule is pickled, it should be fully inspected, and the burned product should be removed. If the burn is not repaired or the repair is unqualified, it should be scrapped. The ferrule with grinding burn is not allowed to enter the assembly process. 4, label management, steel into the warehouse before the ferrule grinding, the process must be strictly managed, strictly distinguish between GCR15 and GCR15SIMN two different materials and products.


Complete code designation of bearing components and accessories

The complete code for the bearing components and accessories consists of the basic code and the supplementary code. The basic code consists of the bearing type code, the size series code and the inner diameter code. Indicates the basic type, structure and dimensions of the bearing and is the basis for the bearing code. The supplementary code is the code number added to the basic code of the bearing structure shape, size, tolerance, and technical requirements. The code added to the left of the basic code is the prea code to identify the bearing components. The code added to the right of the basic code is the post code to indicate the design problem that is different from the original design or different from the current production standards. Bearings have 0-9 classes 0 class deep groove ball bearings Class 1 self-aligning ball bearings 2 types of cylindrical rollers Sub-bearings 3 types of cylindrical spherical roller bearings 4 types of needle roller bearings Category 6 angular contact ball bearings 7 Tapered Roller Bearings Class 8 Thrust Ball Bearings 9 Type Thrust Tapered Roller Bearings The last two digits of the bearing model represent internals. For example: 6205   The last two 05 05*5=25   6 represents 0 class.


Bearing selection for machine tool spindle and turntable

The bearing accuracy on the machine tool spindle should be ISOP5 or higher (P5 or P4 is the ISO accuracy level, usually from low to high is P0, P6, P5, P4, P2), and for CNC machine tools, machining centers For spindle support of high-speed, high-precision machine tools, ISOP4 or higher accuracy is required. Spindle bearings include angular contact ball bearings, tapered roller bearings, and cylindrical roller bearings. Among the above types of bearings, precision angular contact ball bearings are the most widely used. The rolling element of an angular contact ball bearing is a ball because it is a point contact (distinguished from the line contact of the roller bearing), so it can provide higher rotation speed, smaller heat generation and higher rotation precision. In some ultra-high-speed spindle applications, hybrid bearings with ceramic balls (typically Si3N4 or Al2O3) are also used. Compared with the traditional fully hardened steel ball, the ceramic ball material itself gives the ceramic ball bearing the characteristics of high rigidity, high rotation speed, high temperature resistance and long service life, so as to meet the demand of high-end customers for machine tool bearing products. In terms of the contact angle of angular contact ball bearings, the contact angles of 15 and 25 are currently popular; usually the contact angle of 15 has a relatively high rotational speed performance, while the contact angle of 25 has a higher Axial load carrying capacity. Since the choice of preloading has a great influence on the application of precision angular contact ball bearings, for example, in high load bearing and high rigidity, medium or heavy bearing preloading is generally used; for some high speed and high precision applications, In the early selection of bearings, care must be taken to select the appropriate preload. The preload is generally divided into three types: light, medium and heavy. Generally, light preload is more common. In order to facilitate the use of customers, the world's major bearing manufacturers generally provide pre-grinded bearing end faces and preloaded bearings, which is commonly referred to as the universal pairing precision angular contact ball bearing form. This type of bearing eliminates customer preload regulation and saves installation time. In some machine applications with heavy loads and speed requirements, such as the forging of forgings, wire machines for oil pipelines, heavy duty lathes and milling machines, etc., the choice of precision tapered roller bearings is one. An ideal solution. Because the roller of the tapered roller bearing is designed for line contact, it can provide high rigidity and load to the main shaft. In addition, the tapered roller bearing is a pure rolling bearing design, which can reduce the bearing operation. Torque and heat to ensure spindle speed and accuracy. Since tapered roller bearings are capable of adjusting the axial preload (play) during installation, this allows the customer to better optimize bearing clearance throughout the life of the bearing. In addition, in some high-speed applications where the inner ring rim speed is greater than 30 m/s, some specially designed tapered roller bearings can also meet the requirements, such as TSMA bearings or Hydra-Rib hydraulic floating gears. The rib of the edge bearing TSMA bearing has a plurality of lubricating oil holes in the axial direction, which can be lubricated by circulating oil or oil mist. The centrifugal force can distribute the oil to the contact area between the roller and the rib, so that the bearing can be more fully lubricated. Increase bearing speed. The Hydra-Rib hydraulic floating rib bearing is designed to optimize the preload of the spindle system. The bearing has a floating rib that is in contact with the large end of the roller, unlike the common bearing with a fixed inner ring rib; The floating rib is positioned by the "pressure" system, which ensures that the bearing will perform at its best under all conditions and has been successfully used in domestic customers. For precision selection of tapered roller bearings, ISOP5 bearings are mainly used in conventional lathes and milling machines. For machining centers, grinding machines, etc., precision bearings with ISOP4 or higher are usually selected. . In the spindle design, there are two common tapered roller bearing layouts. The first is a tapered roller bearing with a front and rear end and a face-to-face mounting that is compact, rigid and easy to install and adjust. The second is to use two tapered roller bearings to face-to-face as the front end of the main shaft, while the rear end uses a double outer ring and two single inner ring bearings (TDO) as the floating end; Floating capacity, this type of design can withstand the axial thermal expansion of the spindle well, and the rigidity is high, which ensures the accuracy of the machine. In the application of machine tool spindles, double row precision cylindrical roller bearings are also used, usually in combination with precision angular contact ball bearings or thrust bearings. These bearings can withstand large radial loads and allow for higher speeds. The two rows of rollers in the bearing are arranged in an intersecting manner. The fluctuation frequency during rotation is greatly improved compared with the single-row bearing, and the amplitude is reduced by 60% to 70%. These bearings usually come in two forms: NN30, NN30K two series bearing inner ring with ribs, outer ring can be separated; NNU49, NNU49K two series bearing outer ring with ribs, inner ring can be separated, of which NN30K and NNU49K series The inner ring is a tapered hole (taper 1:12), which cooperates with the tapered journal of the main shaft, and moves the inner ring axially to make the inner ring expand, so that the bearing clearance can be reduced or even pre-tensioned (negative clearance) status). Cylindrical bore bearings are usually hot-fitted, with an interference fit to reduce bearing clearance or preload the bearing. For NNU49 series bearings with separable inner ring, the main shaft is usually mounted on the inner ring and then the raceway is finished to improve the spindle rotation accuracy.


Measures to improve the service life of shearer bearings

The shearer cutting section is used to adjust the upper bearing clearance of the heavy-duty planetary reducer. The heavy-duty planetary reducer includes an inner ring gear, a sun gear and a planet carrier, and a plurality of planetary gears and sun gears are mounted on the planet carrier. Engaging with a plurality of planet gears, the ring gear meshes with the planet gears, and a bearing housing is disposed on the cutting portion of the shearer and located at a lower portion of the planet carrier, and a tapered roller bearing 1 is disposed on the bearing housing, and the inner ring gear is provided The upper part is provided with a bearing seat 2, and the bearing seat 2 is provided with a tapered roller bearing 2. The adjustment method of the two gaps of the tapered roller bearing comprises the following steps: step one, installing a sealing cover; step two, calculating a sealing cover and a bearing seat The gap S is between the steps S; the adjustment amount X of the two gaps of the tapered roller bearing is calculated; and the sealing cover is improved according to the adjustment amount X. The effect of the gap adjustment method is good, which not only improves the service life of the bearing, but also improves the service life of the shearer.


Li Rui and other sections of thin-walled ball bearings professionally replace imported bearings

Luoyangli Bearing Co., Ltd., instead of American KAYDON Japan NTN Germany INA, we produce equal-section thin-walled ball bearings with light weight, low rigidity, good bearing capacity, various cross-sections and dimensions; can not be solved in use Design issues. LRZ can provide global users with four-point contact ball structure, radial contact ball structure and angular contact ball structure. Three types of equal-section thin-wall ball bearings can only be used in small space, large load, light weight or special shape requirements. The occasion.


The role and maintenance of the bearing sleeve

The bearing sleeve is to protect the drive shaft. For some drive shafts that are difficult to repair, disassemble or of high value, in order to protect the drive shaft from wear, the sleeve will be installed outside the shaft during the design and then on the sleeve. Mount the bearing for easy installation and maintenance. (1) Bearing sleeves are widely used in places where light loads are easy to disassemble. There are many bearings that are difficult to assemble and disassemble, especially in the assembly of bearings inside the cabinet. The application of the bearing sleeve can solve the assembly and disassembly problems. (2) The bearing sleeve can be adjusted tightly, so that the machining accuracy of many cabinets is relaxed, and the work efficiency of the box processing is greatly improved. (3) The bearing sleeve is also installed to overcome the axial sway of the bearing. Therefore, the bearing sleeve is widely used, but there are also some shortcomings. The accuracy of the bearing sleeve directly affects the radial runout of the shaft.


What are the advantages and product characteristics of related thin-walled bearings?

Thin-wall bearings In order to obtain low friction torque, high rigidity, and good rotation accuracy of bearings, a small outer diameter is used. Steel ball. The use of a hollow shaft ensures space for wiring and wiring. The thin-walled bearing realizes an extremely thin bearing cross section, and also realizes miniaturization and weight reduction of the product. The diversity of products extends the range of applications.

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