Union Trade Tech. Co.,Ltd

Deep groove ball bearing (GB/T 276-2003) was originally named single row radial ball bearing, which is the most widely used rolling bearing. It is characterized by low friction resistance and high speed. It can be used on parts that bear radial load or combined load of radial and axial load at the same time, and can also be used on parts that bear axial load, such as small power motors, automobile and tractor gearboxes, machine tool gearboxes, general machines, tools, etc.   Bearing structure Deep groove ball bearings have a simple structure and are easy to achieve higher manufacturing precision than other types, so they are easy to produce in series and in large quantities, and the manufacturing cost is also low. They are very commonly used. In addition to the basic type, deep groove ball bearings also have various variant structures, such as deep groove ball bearings with dust covers, deep groove ball bearings with rubber seals, deep groove ball bearings with retaining grooves, deep groove ball bearings with large load capacity and ball notches, and double row deep groove ball bearings.   Bearing type Deep groove ball bearings are mainly used to bear radial loads, but are also often used to bear radial and axial combined loads. Especially when the mechanical equipment has a very high rotation speed and thrust bearings are not suitable, this bearing can be used to bear bidirectional pure axial loads and requires no maintenance during operation. It is a low-priced and widely used bearing. The deep groove ball bearing models are: deep groove ball bearing (60000); deep groove ball bearing with a retaining groove on the outer ring (60000N); deep groove ball bearing with a dust cover on one side and a retaining groove on the outer ring on the other side (60000-ZN); deep groove ball bearing with dust covers on both sides and a retaining groove on the outer ring (60000-2ZN); deep groove ball bearing with a dust cover on one side (60000Z); deep groove ball bearing with dust covers on both sides (60000-2Z); deep groove ball bearing with a seal on one side (60000-LS, 60000-RZ); deep groove ball bearing with seals on both sides (60000-2LS, 60000-2RZ); deep groove ball bearing with flange outer ring (F60000); deep groove ball bearing with flange outer ring and dust cover on one side (F60000-Z); flanged outer ring deep groove ball bearing with dust cover on both sides (F60000-2Z), a total of 11 types. All the above models are sold by our company. If you need a specific model, please consult.

A needle bearing is a roller bearing with cylindrical rollers, which are both thin and long relative to their diameter. These rollers are called needleers. Despite their small cross-section, the bearings still have a high load-bearing capacity. Needle bearings are equipped with thin and long rollers (roller diameter D 5mm, L/D ≥ 2.5, L is the roller length), so the radial structure is compact. When the inner diameter size and load capacity the same as other types of bearings, the outer diameter is the smallest, which is especially suitable for supporting structures with limited radial installation size. Depending on the application, bearings an inner ring or needle and cage assembly can be selected. In this case, the surface of the shaft journal mating with the bearing and the surface of the housing hole are directly as the inner and outer rolling surfaces of the bearing. To ensure the same load capacity and running performance as bearings with rings, the hardness, machining accuracy, and surface quality the raceway surface of the shaft or housing hole should be similar to those of the bearing rings. This type of bearing can only bear radial loads. Our company produces and sells full range of needle bearings with good quality. For detailed information about this type of bearing, please feel free to contact us at bin.yao@uniontradetech..

Cylindrical roller bearings are bearings with cylindrical rollers for radial rolling motion. The internal structure of the roller bearing adopts a parallel arrangement of rollers, with spacer rings or isolation blocks installed between the rollers to prevent the rollers from tilting or rubbing against each other, preventing the increase in rotational torque.  Cylindrical rollers and raceways are in line contact bearings. With large load capacity, they mainly bear radial loads. The friction the rolling elements and the ring shoulders is small, making them suitable for high-speed rotation. According to whether the rings have shoulders, they can be divided into single-row cylindrical bearings such as NU, NJ, NUP, N, NF, etc., and double-row cylindrical roller bearings such as NNU, NN, etc. This type bearing has a structure where the inner and outer rings can be separated.  Cylindrical roller bearings with no shoulders on the inner or outer rings allow the inner and outer rings move relatively axially, so they can be used as free-end bearings. In a cylindrical roller bearing with double shoulders on one side of the inner and outer rings and a single on the other side of the ring, it can withstand a certain degree of one-way axial load. Generally, stamped steel cage retainers or solid brass machined retainers are. However, there are also some that use nylon molded retainers. Features:  1. The rollers and raceways are in line contact or slightly modified line contact with large radial load capacity, suitable for heavy loads and impact loads.  2. The friction coefficient is small, suitable for high speed, and the limit speed is close to that deep groove ball bearings.  3. N type and NU type can move axially, can adapt to the relative position change of shaft and housing caused by thermal expansion or installation, and can be used as free end support.  4. High requirements for shaft or housing machining, after bearing installation, the relative deflection of the outer ring axis needs be strictly controlled to avoid causing contact stress concentration.  5. The inner ring or outer ring can be separated, which is convenient for installation and disassembly [1]. :  1. N0000 type with no shoulder on the outer ring and NU0000 type with no shoulder on the inner ring, cylindrical roller bearings This type of bearing can accept larger radial loads, has a high limit speed, does not restrict the axial displacement of the shaft or housing, and cannot accept axial loads.  2 Cylindrical roller bearings with shoulders on both the inner and outer rings, NJ0000 type, NF0000 type bearings can restrict the axial displacement the shaft or housing in one direction, and can accept a small amount of unidirectional axial load. NU0000 HJ0000 type,0000 HJ0000 type, NUP0000 type bearings, can restrict the axial displacement of the shaft or housing in two directions within axial clearance range of the imported bearings, and can accept a small amount of bidirectional axial load. Accuracy grade: Cylindrical roller bearings can be divided into PO P6, P5, P4, P2 according to the accuracy grade. The accuracy grade is arranged from low to high.  Application: Large and medium-sized motors railway vehicles, machine tool spindles, internal combustion engines, generators, gas turbines, reducers, rolling mills, vibrating screens, and lifting and transportation machinery, etc 

Conical roller bearings belong to separable bearings, and both the inner and outer rings of the bearing have conical raceways. This type of bearing is divided into different structural types such as single row, double row, and four row tapered roller bearings according to the number of roller rows installed. Single row tapered roller bearings can withstand radial loads and unidirectional axial loads. When a bearing is subjected to radial load, an axial force component will be generated, so another bearing that can withstand the opposite axial force is needed to balance it.   Conical roller bearings refer to radial thrust rolling bearings with conical rollers as the rolling elements. There are two types: small cone angle and large cone angle. The small cone angle mainly bears the combined radial and axial loads, which are mainly radial loads. It is often used in pairs and installed in reverse. The inner and outer race rings can be installed separately, and the radial and axial clearances can be adjusted during installation and use; The large cone angle mainly bears axial and radial combined loads, mainly axial loads. It is generally not used alone to bear pure axial loads, but can be used to bear pure radial loads when configured as a pair (with the same end installed relative to each other).   The ability of a single row tapered roller bearing to withstand axial loads depends on the contact angle, which is the angle of the outer raceway. The larger the angle, the greater the axial load capacity. The most commonly used tapered roller bearing is the single row tapered roller bearing. In the front wheel hub of the sedan, small-sized double row tapered roller bearings are used. Four row tapered roller bearings are used in heavy machinery such as large cold and hot rolling mills.

Linear bearing: Metal linear bearing is a low-cost linear motion system designed for use with infinite travel and cylindrical shafts. Widely used as sliding parts in industrial machinery such as precision machine tools, textile machinery, food packaging machinery, printing machinery, etc   Introduction:   Linear bearings are a type of linear motion system used in conjunction with cylindrical shafts for linear travel. Due to the contact between the bearing ball and the outer sleeve of the bearing, the steel ball rolls with minimal frictional resistance. Therefore, linear bearings have low friction, are relatively stable, and do not change with the bearing speed. They can achieve stable linear motion with high sensitivity and accuracy. The consumption of linear bearings also has its limitations, mainly due to the poor impact load capacity and load-bearing capacity of the bearings. Secondly, linear bearings experience significant vibration and noise during high-speed motion. The automatic selection of linear bearings is included. Linear bearings are widely used as sliding components in industrial machinery such as precision machine tools, textile machinery, food packaging machinery, printing machinery, etc Due to the contact between the bearing ball and the bearing point, a small load is used. The steel ball rotates with minimal frictional resistance, allowing for high-precision and smooth motion. Plastic linear bearings are a self-lubricating linear motion system, and their biggest difference from metal linear bearings is that metal linear bearings have rolling friction and point contact with cylindrical shafts, making them suitable for low load high-speed motion; Plastic linear bearings have sliding friction and are in surface contact with cylindrical shafts, making them suitable for high load and low-speed motion.

Ceramic bearings - equipment used in aviation, aerospace, navigation, and petroleum industries Ceramic bearings, as an important mechanical component, are at the forefront of the new materials world due to their excellent performance that metal bearings cannot match, such as high temperature resistance and super strength. In the past decade, it has been increasingly widely applied in various fields of national economy and people's livelihood. Advantages: 1. Due to the fact that ceramics are almost not afraid of corrosion, ceramic rolling bearings are suitable for operation in harsh conditions filled with corrosive media. 2. Due to the lower density and lighter weight of ceramic rolling balls compared to steel, the centrifugal effect on the outer ring during rotation can be reduced by 40%, thereby greatly extending their service life. 3. Ceramics are less affected by thermal expansion and contraction than steel, so when the clearance between bearings is constant, bearings can be allowed to work in environments with significant temperature differences. 4. Due to the higher elastic modulus of ceramics compared to steel, they are less prone to deformation under stress, which is beneficial for improving working speed and achieving higher accuracy. Ceramic bearings have characteristics such as high temperature resistance, cold resistance, wear resistance, corrosion resistance, resistance to magnetic and electrical insulation, oil-free self-lubricating, and high speed. Can be used in extremely harsh environments and special working conditions. Ceramic bearings can be divided into: zirconia with retainer ceramic bearings, silicon nitride with retainer ceramic bearings, and composite with retainer ceramic bearings. The retainer material for general ceramic bearings is polytetrafluoroethylene (PTFE) as the standard configuration, and glass fiber reinforced nylon 66 (GRPA66-25), special engineering plastics (PEEK, PI), stainless steel (SUS316, SUS304), brass (Cu), etc. can also be used. Ceramic material retainers are still rarely used due to difficulties in pocket hole processing, molding technology, and other related issues; Due to the material limitations of the retainer, non retainer zirconia full ball all ceramic bearings, silicon nitride full ball all ceramic bearings, and composite full ball ceramic bearings have been developed for special use scenarios. The main components of ceramic bearings, including the inner and outer rings and rolling elements, are mostly made of ceramic materials, which are defined as ceramic bearings; If some of the inner and outer rings and rolling elements of the bearing are not made of ceramic materials, we define it as a hybrid ceramic bearing. The widely used hybrid ceramic bearings are ball bearings made of ceramic materials called ceramic ball bearings, which can be divided into zirconia ceramic ball bearings and silicon nitride ceramic ball bearings.