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Types of turbo-charged bearing

Turbo-charger bearing.Its structure is related to the reliability and durability of turbine work. Turbocharger bearings are mainly divided into two categories, one is floating bearings (commonly known as Bosi bearings), and the other is ball bearings.Most major auto manufacturers now use floating bearings, which should be durable and affordable. Th... View Details

What are the characteristics of ball screw support bearings

Link: Sealed Bearings

Features of ball screw support: (1) The adoption of the best bearing du takes into account the balance in rigidity with the ball screw, so that dao uses high-rigidity and low-torque angular contact ball bearings (contact angle 30°, free combination). At the same time, the ultra-small support units EK6, 8 are equipped with ultra-small angular ... View Details

What is a pitch bearing?

Link: Tractor clutch bearing

The pitch bearing is a kind of rolling bearing. The ball ball is installed in the middle of the inner steel ring and the outer steel ring, and can bear a large load. Also called ball bearing. The purpose of pitch bearings is to determine the relative position of two parts (usually the shaft and the bearing seat) and ensure their free rotation, whil... View Details

What is yrt bearing?

Link: Tractor clutch bearing

YRT bearing is a slewing mechanism with outer ring rotation and inner ring support. A row of radial rollers ensures that the bearing can bear radial force and overturning moment. YRT bearing consists of a thrust/centrial seat ring and a thrust/radial axis The ring, a thrust washer, two needle roller cage assemblies and a set of centripetal cylind... View Details

How much do you know about electric spindles?

Link: Elevator Bearing

I. Structural compositionThe electric spindle is a new technology that combines the machine tool spindle and the spindle motor in the field of CNC machine tools in recent years. The main drive system of high-speed CNC machine tools eliminates the belt drive and gear drive. The main shaft of the machine tool is directly driven by the built-in m... I. Structural compositionThe electric spindle is a new technology that combines the machine tool spindle and the spindle motor in the field of CNC machine tools in recent years. The main drive system of high-speed CNC machine tools eliminates the belt drive and gear drive. The main shaft of the machine tool is directly driven by the built-in motor, which shortens the length of the main drive chain of the machine tool to zero and realizes the "zero drive" of the machine tool. This type of transmission structure intergrating spindle motor and machine tool spindle, which makes the spindle components relatively independent from the drive system and overall structure of machine tool, so it can be made into a "spindle unit", commonly known as electric spindle or Motor Spindle.The electric spindle is a set of components, which includes the electric spindle itself and its accessories: electric spindle, frequency conversion device, oil mist lubricator, cooling device, built-in encoder, tool changer, etc. The rotor of the motor is directly used as the main shaft of the machine tool, and the housing of the main shaft unit is the motor base, and other parts are integrated to realize the integration of the motor and the main shaft of the machine tool.II.Driving methodThe electric motor of the electric spindle adopts AC asynchronous induction motor. It is used on high-speed processing machine tools, so it needs to rise rapidly from static to tens of thousands of revolutions per minute or even hundreds of thousands of revolutions at startup. The starting torque is large, so the starting current must exceed the rated current of the ordinary motor by 5 to 7 times.. There are two types of drive methods: inverter drive and vector control drive. III. Application of high-speed electric spindle in machine tool industry1. Simplify structure and promote modular machine tool structureThe electric spindle can form standardized and serialized products according to the characteristics of use, structure, and performance parameters for the host to choose, thereby promoting the modularization of the machine tool structure.2. Reduce machine tool costs and shorten machine tool development cycles. Standardized and serialized electric spindle products are easy to form professional and large-scale production, and can shorten the development cycle of machine tools, adapting to the current fast-changing market trend.3. Improve machine performance and reliability.The CNC machine tool adopting the electric spindle structure has improved the reliability of the machine tool due to the simplified structure and the reduction of transmission and connection links; the electric spindle components with the mature technology, complete functions, excellent performance and reliable quality make the machine tool more reliable.4. Realize the special requirements of some high-end CNC machine tools.Some high-end CNC machine tools, such as parallel kinematic machine tools, pentahedron machining centers, small hole and ultra-small hole processing machine tools, must use electric spindles in order to meet the complete functional requirements. The electric spindle system is directly driven by the built-in motor to meet the high-speed cutting’s requirements of “high speed, high precision, high reliability and small vibration” on the machine tool. The combination of electric spindle technology and motor frequency conversion, closed-loop vector control, and AC servo control technology can meet the needs of metal cutting processing such as turning, milling, boring, drilling, and grinding.In September 1958, the spindle manufacturing department successfully developed China's first high precision electric spindle. The electric spindle uses the speed of 30,000 ~ 60,000r / min for precision bearing grinding.Through the efforts of several generations of spindle employees, ZYS has established its leading position in the field of high frequency Spindle spindle in China, and its research and development strength and spindles varieties rank first in China.For more detailes of electrical spindle, please contact Mr. ZHANG by zys_zyj@163.com.zys electrical spindleZYS bearing testing machines are suitable for bearing life tests and all kinds of simulation tests. The bearing testers can realize automatic loading and centralized View Details

Which type of bearing is less noisy?

Link: Tractor clutch bearing

The noise of bearing not only affects the bearing operation, but also brings a lot of trouble to the mechanical equipment. The intrusion of foreign materials will directly cause certain noise during the operation of the bearing, and the improper lubrication and wrong bearing installation will also cause bearing noise. Which kinds of bearings have l... View Details

Introduction of Bearing Ring Groove Superfinishing Machine

Link: Elevator Bearing

Bearing Ring Groove Superfinishing Machine is semi-automatic superfinishing machine for groove of ball bearing ring, which is suitable for processing inner and outer ring groove.Processing accuracy is above P5 level. The workpiece spindle of the machine is driven by an AC- motor through belt pulley, and the variable frequency stepless speed is reg... View Details

Technical requirements of manufacturing slewing bearing

Link: Elevator Bearing

1. Confirms with the technical requirements of the implementation of JB / T 10839-2008 slewing ring standard; 2. Material quenching HB207-262; 3. Raceway quenching HRC55-62, hardened layer depth 3-4mm, no cracks; 4. The installation hole did not note chamfered ends are 1.0 * 45 °; 5. Gear accuracy 10GK GB10095-88, the amount of gear be... View Details

The working principle of deep groove ball bearings

Link: Elevator Bearing

Deep groove ball bearings are suitable for high speed operation, low vibration and low noise, and they are extremely durable and require no maintenance. Deep groove ball bearings have the features of small friction coefficient, high limit speed, various sizes and forms, and they can be used in precision instruments, low noise motors, automobiles, m... View Details

Selection of Bearing Sizes

Link: Elevator Bearing

It is really important when choosing the bearing type. Wrong choice of bearing sizes will cause bearing damage and failure. ZYS can help you choose the suitable type. When selecting the type, it is necessary to ... View Details

Method for positioning and fixing inner and outer rings of rolling bearings

Link: Elevator Bearing

Method a. The retaining ring is embedded in the groove of the shaft, and is mainly used when the axial force is not large and the rotating speed is not high; image Method b. Tightened with screw and retain... View Details

The difference between full ceramic bearings and hybrid bearings

Link: Elevator Bearing

Usually, people thought that bearings are actually hybrid bearings. So, today we will talk about the difference between full ceramic bearings and hybrid bearings? Ceramic Bearings Full ceramic bearings co... View Details

The factors need to be considered for bearing seals

Link: sealed bearings

Bearings are a kind of commonly used mechanical hardware products. Good bearings need to have excellent sealing performance during use. At present, the seals of bearings can be divided into two types: self-contained sealing and external sealing. Generally, the self-contained sealing is relatively simple and the cost is also relatively low; and the ... View Details

Configuration type of common rolling mill bearings

Link: sealed bearings

(1) Spherical roller bearings. The configuration of the early rolling mill bearings on the rolling mill is different from the present. At that time, two sets of spherical roller bearings were mainly installed side by side on the same roller neck. This configuration basically meets the production conditions at that time, and the rolling speed can r... (1) Spherical roller bearings. The configuration of the early rolling mill bearings on the rolling mill is different from the present. At that time, two sets of spherical roller bearings were mainly installed side by side on the same roller neck. This configuration basically meets the production conditions at that time, and the rolling speed can reach 600 rpm. (2) Four-row cylindrical roller bearing + thrust bearing. The inner diameter of the cylindrical roller bearing is tightly matched with the roll neck, and it can bear radial force. The cylindrical roller bearing has advantages of large load capacity, high limit speed, high precision, easy processing, low production cost, convenient installation and disassembly and the inner and outer rings can be separated. The thrust bearing bears axial force, and the specific structure type can be selected according to the characteristics of the rolling mill. While for heavy-duty low-speed, we can equip with thrust roller bearings to withstand the thrust load with a small axial clearance. When the rolling speed is high, it is equipped with angular contact ball bearings so that speed limit is high and the axial clearance can be controlled. This type of bearing configuration not only has long bearing life, high reliability, but also has many advantages such as high precision and easy control of rolling products. Therefore, it is widely used in wire rod mills, sheet mills, foil mills, and support rolls for cold rolling mills and hot rolling mills. (3). Four-row tapered roller bearings. The tapered roller bearings can withstand both radial and axial forces, and no need to configure thrust bearings. The inner diameter of the tapered roller bearing is loosely matched with the roll neck. It is very convenient to install and disassemble, but sometimes it will cause sliding creep due to the loose fit. Therefore, the inner diameter is often processed with a spiral oil groove. This type of configuration is widely used in the working roll of four-roll hot rolling mill and a cold rolling mill, and roll for blanking machine, steel beam rolling mill. View Details

Factors affecting the performance of ZYS Spindle

Link: sealed bearings

Heating of spindle is the factor which effects the operation precision of ZYS spindle. The internal heat source of the spindle comes from two aspects: 1. the heating of the spindle bearing; 2. the heating of the motor in the spindle. Solving the motor heating problem needs the cooling motor stator, which can be realized by circulating water cool... View Details

Daily maintenance of bearings

Link: sealed bearings

Bearings are an important part of machinery. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. Maintenance work is the top priority for bearings to work properly, maintain performance, and extend life. Everyone should take it seriously. Next, let's... Bearings are an important part of machinery. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. Maintenance work is the top priority for bearings to work properly, maintain performance, and extend life. Everyone should take it seriously. Next, let's take a closer look at the daily maintenance work of the bearings. First, keep the bearings lubricated and clean Before inspecting the bearing, clean the surface of the bearing first and then remove the parts around the bearing. Pay special attention to the oil seal, which is a very fragile part. Please be careful when inspecting and disassembling the bearing to avoid damage to the part. If you have been experiencing bad symptoms when inspecting the oil seal of bearing and its surrounding parts, be sure to replace it to avoid damage to the bearing caused by a bad oil seal. Second, to ensure the quality of bearing lubricants The quality of the lubricant has a direct impact on bearing service life. The inspection method for the bearing lubricant is as follows: the lubricant is rubbed between the two fingers, and if there is a contaminant, it can be felt; or a thin layer of lubricant is applied on the back of the hand, and then the sealing is checked. Then it is to replace the lubricant of the bearing. Third, the working environment of the bearing When inspecting bearings, never expose them to contaminants or moisture. If the work is interrupted, cover the machine with a piece of oil-paper plastic or similar material. The working environment of the bearing is also very important. Fourth, the bearing seal The purpose of bearing sealing is to prevent dust, moisture and impurities from entering the bearing, but also to prevent the loss of lubricant. A good seal ensures that the machine works properly, reduces noise and extends the life of the parts. The above is the relevant introduction of the daily maintenance work of the bearing. It is mainly explained from four aspects. In fact, these four aspects are also related to each other. Therefore, bearing maintenance work is carried out closely around the four words of clean, lubrication, sealing and environment. View Details

Installation and maintenance of slewing bearing

Link: sealed bearings

Slewing bearings require careful handling. Slewing bearings should always be transported and stored in horizontal position and be stored in dry roofed areas. Use eyebolts for horizontal handling. Impact, particularly in radial direction, must be avoided. The surface of slewing bearing should be applied with anti-corrosion oil, and the anti... View Details

General information about Bearing test machine

Link: sealed bearings

The company has conducted in-depth research on the testing technology and reliability theory of all kinds of bearings, engaging in the development and manufacture of bearing testing equipments and undertaking the simulation testing, life testing and other performance tests for all kinds of bearings. We can also develop and manufacture the fully aut... The company has conducted in-depth research on the testing technology and reliability theory of all kinds of bearings, engaging in the development and manufacture of bearing testing equipments and undertaking the simulation testing, life testing and other performance tests for all kinds of bearings. We can also develop and manufacture the fully automatic control simulation testing machines for the bearings used in various machineries(aviation, spaceflight, railway, automobile, motorcycle, machine tool, motor, etc.) Bearing life test machine Bearing life test results is an important index of comprehensive evaluation of bearing quality. It can reveal the quality level of bearing structure design, manufacturing process, material and lubrication etc. This series of machine is controlled by industrial computer automatically. The load, speed, operation time and other main parameters can be preset, and the machine can work according to the set procedures. The test machine can also monitor, record automatically on bearing load, temperature, vibration, motor speed, current and other parameters. When the testing bearing failure or something wrong with the test machine, the machine will alarm downtime and record down the reason automatically, to realize unattended and intelligent management. Auto bearing testing machine This series of machine are realized the computer automatic control, monitoring test parameters, recording, alarm downtime and other functions. This series of machine test subject design is unique, simulation accurately, high machining accuracy, high components configuration, so as to ensure the stability and reliability of the bearing test. Sealed bearing testing machine This kind of machine are often used to evaluate the bearing performance of a particular level and the durability of the bearing performance, such as the seal, friction, high-speed, high temperature resistance performance. Control mode can be automatic computer control or manual control. Bearing parts testing machine A lot of experiments and data statistics show that when bearing fatigue failure, the most probability is roller failure. Therefore, steel ball contact fatigue testing machine and roller fatigue testing machine are used to test the fatigue life of rolling elements. And then study the internal relationship between rolling element's fatigue life, material, manufacturing process, finished product quality etc. View Details

Three Methods for Identifying Bearing Faults

Link: sealed bearings

Bearing as a precision part of mechanical equipment, how to improve the productivity of the factory, the first mechanical equipment must be the best performance. And mechanical equipment performance use of one of the largest relationship-bearing. Therefore, the factory in production and processing, must be mechanical equipment in the bearing good i... View Details

Method of Judging Grease Metamorphism

Link: sealed bearings

In order to provide better performance, the bearings are lubricated by lubricating grease, which can reduce the friction and temperature of the bearings, if the grease is bad. Not only does not play a related role, but is more adverse to the use of bearings, so we must learn how to buy grease to tell whether the grease has deteriorated. Me... View Details

Common faults and solutions for CNC machine tool spindles IV

Link: sealed bearings

Problem five:The spindle stops immediately after starts. The cause of the failure and the solution: 1. System output pulse time is not enough: adjust the system's M code output time. 2. The inverter is in jog state: Refer to the instruction manual of the inverter and set the parameters. 3. The control components of the spindle line are ... View Details

Common faults and solutions for CNC machine tool spindles III

Link: sealed bearings

Problem three: the rotating speed of the spindle without frequency conversion (shift spindle) is not controlled The cause of the failure and the solution: 1. System has no S01-S04 control signal output: Check whether the system has shift control signal output. If no, it is system failure, replace the IC or send the factory for repair. 2. C... View Details

Common faults and solutions for CNC machine tool spindles II

Link: sealed bearings

Problem two: the spindle with the inverter does not turn The cause of the failure and the solution: 1. Mechanical transmission failure: Check whether the driving belt is broken or whether the machine tool is in neutral. 2. Three-phase power supply to the spindle is missing: Check the power supply and exchange any two power lines. 3. The... View Details

Advantages and Disadvantages of Gas Lubricating Bearing

Link: sealed bearings

The so-called gas lubricated bearing is the interactive bearing which uses the gas lubricant to carry on the lubrication, our common gas lubricant is the air. Is in use. The mechanism of gas lubricated bearing forming bearing film is the same as that of liquid lubricated bearing. Therefore, gas lubricated bearing has the following advantages and di... The so-called gas lubricated bearing is the interactive bearing which uses the gas lubricant to carry on the lubrication, our common gas lubricant is the air. Is in use. The mechanism of gas lubricated bearing forming bearing film is the same as that of liquid lubricated bearing. Therefore, gas lubricated bearing has the following advantages and disadvantages. Advantages of Gas lubricated bearings 1. High speed The rotational speed of the small helium turbine expander has reached 650,000 rpm, the linear velocity is 238m / s, and by DN it has reached 455x106mm ·r / min. 2. High precision The gas film has the effect of error homogenization, and its precision is two orders of magnitude higher than that of the rolling bearing, and the vibration is small and the noise is low. 3. Small friction loss The gas viscosity is only 1/1000 of the lubricant viscosity, so the friction torque caused by internal friction of the film is three orders of magnitude lower than that of the oil film. 4. Wide applicable temperature range, can resist atomic radiation High temperature up to 300-500 ℃, low temperature to 10 K gas bearing can still work. 5. No pollution The lubricating gas is usually air or inert gas, which does not cause pollution to the atmosphere. The bearing vibration is small, the noise is low, and it does not pollute the environment. 6. Long life-span The aerostatic bearing has no metal direct contact and the theoretical life is infinite. Considering other conditions, it should generally be above 104H. There is an intermetallic friction at the moment of starting and stopping of the dynamic pressure gas bearing, and the life is affected, but it is also above 3000h. Shortcomings of gas lubricated bearings 1 . Low bearing capacity The bearing capacity of the gas - lubricated bearing is about 1 - 2 orders of magnitude lower than that of the oil - lubricated bearing of the same kind . According to the bearing capacity of the unit area , the oil - lubricated bearing is generally ( 0.5 -2 ) MPa , and the gas - lubricated bearing is only ( 0.02 - 0.04 ) MPa . 2. Poor reliability On the one hand, the gas lubricated bearing is easy to lose its stability, and the air hammer vibration and vortex instability are common, on the other hand, the gas lubricated bearing is stuck, and the phenomenon of holding the shaft or killing the shaft also occurs from time to time. 3. High manufacturing precision and high cost Because the gas film is very thin, generally in the range of several microns to tens of microns, so the manufacturing accuracy of the parts is high, which increases the cost. In addition, there are special process requirements such as machining spiral grooves, throttle holes and porous materials. Increased manufacturing difficulty and cost. 4. Demanding working conditions Gas lubricated bearings require a high cleanliness working environment and strict compliance with operating procedures to ensure that the bearings work properly and without accidents. Therefore, its wide application and commercialization are limited to a certain extent. View Details

General information of ZYS needle bearing

Link: sealed bearings

The needle bearing is roller bearing with a cylindrical roller, which is both thin and long with respect to its diameter. In spite of the smaller cross-section, the bearing still has a high load bearing capacity. The needle bearing is equipped with thin and long rollers (roller diameter D ≤ 5mm, L/D ≥ 2.5, L means the length of the roller), the... View Details

High temperature adaptability of bearings

Link: sealed bearings

The high temperature adaptability of the bearing and the heat treatment process of the bearing within an outer diameter of 240 mm ensure that it is dimensionally stable below 150 degrees. Special heat treatments are required if the operating temperature is above 150 degrees. These bearings are marked with the suffixes S1 to S4 (DIN 623). S1: Ma... View Details

How to distinguish ZYS low speed bearing and high speed bearing?

Link: sealed bearings

High and low speed bearings are generally defined with linear speed rather than rotational speed. The speed of high speed bearings must reach the speed requirement of over 60 meters per second, so small bearings may be tens of thousands of turns, but they are not high speed bearings; very large bearings may only have hundreds of turns per minute, b... View Details

Bearing components

Link: sealed bearings

1. Bearing part One of the parts that make up the rolling bearing, but does not include all the accessories. 2. Bearing ring Including the annular part of radial rolling bearing with one or several raceways. 3. Bearing washer Including the annular part of thrust rolling bearing with one or several raceways. 4. Flat ring A detachable flat was... 1. Bearing part One of the parts that make up the rolling bearing, but does not include all the accessories. 2. Bearing ring Including the annular part of radial rolling bearing with one or several raceways. 3. Bearing washer Including the annular part of thrust rolling bearing with one or several raceways. 4. Flat ring A detachable flat washer with its inner or outer portion as a rib for the outer or inner ring of a radial cylindrical roller bearing. 5. Oblique ring (separable) A separable ring with "L" shaped cross section with its outer portion as a rib of the inner ring of radial cylindrical roller bearing. 6. Middle retaining ring A separable ring in a roller bearing with two or more rows of rollers for isolating the two rows of rollers and guiding the rollers. 7. Stop ring A single port ring with constant cross-section, mounted in an annular groove, axially positions the rolling bearing within the housing or on the shaft. 8. Lock ring A single-mouth ring with a constant cross-section, mounted in the annular groove as a retaining ring to hold the roller or cage in the bearing. 9. Spacer It is a toroidal part used between two bearing rings or bearing washers or between two half bearing rings or between two half bearing washers to maintain a defined axial distance between them. 10. Sealing ring An annular cover consisting of one or several parts, fixed to a ferrule or washer of the bearing and in contact with another ferrule or gasket or forming a narrow labyrinth gap to prevent leakage of lubricating oil and invasion of foreign objects. 11. Dust cover It is an annular cover, usually stamped from a thin metal plate, fixed to a ferrule or washer of the bearing and extending toward the other ring or gasket to cover the inner space of the bearing, but not in contact with another ferrule or gasket. . 12. Guard ring A part attached to the inner ring or shaft ring that utilizes centrifugal force to enhance the ability of the rolling bearing to prevent foreign objects from entering. 13. Rolling body A ball or roller that rolls between the raceways. 14. Cage A bearing component that partially wraps around and moves with all of the rolling elements to isolate the rolling elements and also generally guides the rolling elements and retains them within the bearings. View Details

Machine Tool Auxiliary Connecting Device for Tapered Roll Production Line

Link: sealed bearings

I. Range The whole line from heat-treated workblank to finished products and packaging. II. The configuration description and requirements of the connecting device 1. Configuration requirements for each part 1.1 Demagnetization and conveying machine Conveying Mechanism: Adopting two polyurethane double synchronous belts, the drive ad... I. Range The whole line from heat-treated workblank to finished products and packaging. II. The configuration description and requirements of the connecting device 1. Configuration requirements for each part 1.1 Demagnetization and conveying machine Conveying Mechanism: Adopting two polyurethane double synchronous belts, the drive adjusts speed through ac frequency conversion and in the same direction. The polyurethane belt is of high friction, and will not produce slippage and scratches on the roller surface. Demagnetization machine: Adopting gantry demagnetization machine from domestic first-line manufacturer. The machine is fastened to the top of the v-belt and the tapered rollers passes through it one by one. After demagnetization, the residual magnetism is less than 0.25MT. Conveyor bracket: Combined with anodic oxidation treated aluminum profile and aluminum plate, and fastened and connected by special screws, the height of the bracket can be freely adjusted according to the needs of production. The material will never be embroidered. Actuating device: Domestic gear reducer and Taida AC frequency converter speed regulation，making it synchronous with the machine tool and perform reliably. Feed-in and feed-out exit: Using never deformed poly methyl material with flat surface, the products will not stagnate. Direction Adjustment Machine: Two rolling bars, made of special polyurethane materials form a certain angle and rotate oppositely at the same time. The rollers naturally adjust the direction of the heads between the two rolls, ensuring that each of the tapered rollers is transported in the same direction. Body frame: Adopting anodic oxidation treated aluminum profile and steel plate, ensuring enough rigidity and beauty, making the machine durable and solid. 1.2 V-type chain plate hovering and lifting conveyor consists of three disks. It is connected by multiple chain plates from the lowest position to the highest. It is driven by the electric machine and hovers upwards. Each layer has a filling and cutting device, it can store the products as well as solve the problem of high loading. A stainless steel pan is placed below the circling chain plate so that residual coolant does not drop to the ground. Chain plate: American DuPont (PTE content 18%) Polyoxymethylene. It will not change in length and will not deform after long time operation. Drive: Gear reducer + frequency converter Driving head: Cast by aluminum casting die in one time Chain wheel: Nylon material Frame: Anodic oxidation treated aluminum profile Feed-in/Feed-out: Structured by stainless steel and spring. All the feeding inlet of the equipment is equipped with mechanical anti - turning mechanism to prevent unnecessary damage to equipment and tooling due to roller turning; The electrical apparatus is controlled as a separate control box. Demagnetization, delivery, direction adjustment, and hovering in-feed are controlled by one control cabinet with manual / automatic two gears for easy adjustment for each action. Besides, fault alarm and automatic stop function are set. View Details

Manufacturing Process of Bearing

Link: sealed bearings

1. Main material of bearing: 1. Bearing steel: High carbon bearing steel (SUJ2→light shape; SUJ3 →heavy section; SUJ4 →special type steel) 2.Precision requirement: International standard 1. ID tolerance: Above Φ20, 0~-10um 2. OD tolerance: 0~-10um 3. Thickness deviation: 0~-120um, generally 30-40. Remark: The bigger the ID, the bigger the... View Details

Ensure the lubrication quantity

Link: sealed bearings

It is important to ensure the proper fill quantity of lubrication in order that all contact surfaces are provided with a suitable lubricating film over the operating life. Both over-lubrication and under-lubrication are very harmful. With over-lubrication, there is an increase in the internal friction of the component as excess lubricant is moved t... View Details

Basic Knowledge of Bearing