How to prolong the life of the bearing flange

Whether buyers or sellers are concerned, the length of the bearing life. Such as: flanged bearing mainly take radial load, but also to support radial and axial load. But for the life of the Flange Slewing Bearing are not very understanding, the following three steps teach you extend bearing life:
(1) In order to make a gap in the radial direction between the bearing retainer and the bearing ring is set larger than the eccentric amount of the internal structure has been improved;
(2) the use of FEM analysis, by the shape and thickness were optimized to improve the strength of the holder;
(3) In order to prevent reduce surface damage caused by lubricating oil in the bearing ring in the design of the guide groove.

Flanged ball bearing practical range

Flange bearing is suitable for all kinds of industrial equipment and small rotary motor, office equipment, micro motor soft drive, pressure rotor, dental drill, the hard disk motor, stepping motor, VCR drum, toy model, a fan, a pulley, roller, transmission equipment, entertainment equipment, robots, medical equipment, office equipment,four point contact ball slewing bearing testing instruments, reducer, transmission device and a motor optics, image equipment, card reader, mechanical and electrical, precision machinery, electric tools and toys etc..

The support of national policy on the flanged ball bearing

Chinese high-end bearings based on underdevelopment, Twelfth Five year development plan has been introduced to put forward clearly,crane bearing ， developing countries will play a guiding role of industrial policy to support the bearing industry.（ flanged ball bearing ）

  A guiding role in the country, bearing industry access threshold will be increased, high capacity of low-end products will be controlled, research and development of high speed bearing will enter a rapid stage.

LYHY high speed bearings domestic competitive advantage

Development of bearing industry in China has made certain achievements, but there are problems that can not be ignored, the most prominent is the low-end products, high-end products still rely mainly on imports.

  A serious gap between the development of miniature ball bearings and China's machinery and equipment. It is gratifying, some have certain accumulation, and is committed to innovation of the enterprise has the breakthrough in the development of high bearing product.

  For example, specializing in R & D and production of P4, P2 level high precision bearing Luoyang LYHY high precision bearings Co., ltd..

  At present, flanged ball bearing , machine tool spindle bearings,high speed bearing the company's market competitive advantage obviously, especially machine tool bearings, product quality has to be imported products with equivalent.

Domestic flange bearing sales in 2015 will reach 222 billion yuan

Flange bearing is the key components of machinery equipment manufacturing industry, whose performance, quality and reliability of mechanical equipment depends on the bearing.

Bearing industry in China after years of development, has formed a relatively mature industry scale. At present, the bearing industry in China with an annual output value of 130 billion yuan, ranking third in the world（ high speed bearing ，metallurgical bearing）.

It is expected that by 2015, China's bearing industry sales will reach 222 billion yuan, with an average annual growth rate maintained about 15%.

The big three models of flange bearings

Since flange bearing are designed to increase  accuracy of position, there are thousands and hundreds models availability.Each designed for applicability of particular ball bearing functions and requirements.
When selecting a high speed bearing, the dimensions should suit the diameter of the shaft, and they are thus available in a myriad of sizes. The largest differentiating factor between flange bearings is the number of bolts (mounting holes) on the mechanism.
Double-bolt flanges
These flanges are available either in a wing-shape or in a diamond shape, which have two mounting holes, (usually elongated for simple, user-friendly adjustment). They are engineered to be repositioned and aligned for the best fit of shaft
Three-bolt flanges,these flanges are round, which have three equidistant mounting holes.
They are engineered to be repositioned and aligned for the best fit of shaft.

Four-bolt flangesThese flanges are square shaped, which have four equidistant mounting holes. For the larger number of positioning bolt-holes, they are more stable than their double-bolt counterparts,thus have a greater load-capacity. They are engineered to be repositioned and aligned for best fit of shaft.

  Flange linear ball bearing often made from cast iron or thermoplastic material. But some manufacturers produce flange bearings of  plastic. The polymer bearings offer a more cost-effective option to metal flanges. They are backed by a thin construction to compensate for the lost width,maintaining the stability and temperature resistance offered by their metal counterparts.

Motion mechanism of flange bearing

Flange bearing especially engineered to provide a precise mounting fit for ball bearing,which executed through axial location of the bearings' shaft ends, stabilizing the position of bearings and consequently maximizing the load support. When utilizing a miniature ball bearing where the shaft axis is perpendicular to the mount, flange bearing facilitate rotary or linear movement.
There are many kinds of flanges, whose designs and  cages are engineered to suit their corresponding ball bearings. in order to optimize their loading and speed capacities, allow the two devices to function in accordance. The flange bearing is screwed in relation to the shaft axis. Thus the mechanism is comprised of an insert attached to a relatively flat housing structure.
Flange bearing is usually equipped with  easily install spherical ball that offers a pivoting angle so as to relieve misalignment. The characters of bearing are  highly sturdy, maintenance-free, dirt-resistant, water-resistant, and able to adapt to an array of room temperatures.

LYHY miniature ball bearing

A ball bearing can be highly effective at reducing friction between two parts that need to move freely. There is some elasticity to the ball allowing it to support and move a range of bearing loads.
Naturally, the balls in such bearings come in a variety of different sizes, from fairly large to miniature. Small Bearings can be extremely useful in applications where space is limited, such as automotive, electrical  and medical devices.
LYHY Miniature ball bearings afford you wide variety of miniature bearings means that you are certain to find just the bearings you are looking for. Use the bearings search fields to find the bearings you need. Search by bearings size according to inch or metric measurement and by inside diameter size and outside diameter size.

Tips for miniature bearing heating

• the yoke placed  on the end face of the host .

• insert the plug into a power socket with switches.

• check the grounding wire, after the power is switched on with the test pencil test.

• press the start button, the main power switch.

• check the yoke to ground shall be voltage free.

• press the stop button to stop the host power, heating.

• according to the linear ball bearing with different specifications or other workpiece, choosing different sets of the yoke, the yoke on the top surface of the host,  should be smooth.

• heating high speed bearings , the sensor should be inserted into the Sensor Socket, and will be close to the workpiece is heated sensor.

The failure reason of miniature bearings

The failure of the ball in the flanged ball bearing in about 40% are caused by dust, dirt, debris pollution and corrosion. Pollution is usually caused by incorrect use and poor use environment, it also causes torque and noise problems.
Miniature ball bearings produced by the environment and pollution of the failure can be prevented, and observed by the naked eye is simple can determine the production of this kind of failure reason. As long as the use and reasonable installation, denudation of miniature bearing is easy to avoid. Erosion is characterized in miniature bearing ring raceway on the left indentation produced by impact load or incorrect installation.
Erosion is usually occurs in the load exceeds the yield limit of material. If not installed correctly so that a load across the miniature bearing ring will produce erosion. Miniature bearing ring on the pressure pit will produce noise, vibration and the additional torque.

Miniature bearings

Miniature bearing refers to  all kinds of bearings,whose outside diameter less than 9mm of  metric series and outside diameter less than 9.525mm of inch series. The main materials are steel, bearing steel, stainless steel, plastic, ceramic, wherein the inner diameter of the smallest can do 0.6mm, with more 1mm inner diameter.

  In the miniature bearing of ultra small aperture, types of miniature deep groove ball bearings are metric 68 series, 69 series, 60 series, a total of 6 inch R series.On this basis,angular contact ball bearing also can be divided into with ZZ steel dust cover bearing series, with RS rubber sealing ring for miniature bearing series, teflon bearing seal ring series and with flange rib series and so on.

Flanged ball bearing show

Many miniature ball bearings have flanges as options to their configurations. The flange is designed for mounting and positioning,which is especially true for miniature and instrument bearings and applies to other ball bearing types.

  To get various types of flanged ball bearings click the next lists,

  slewing-bearings,flanged-bearing

Relevant parts of requirements of the high speed bearing host

Rotating system of high speed bearings  require  precision dynamic balancing.Installation bearing part of shaft and hole  is higher than the general requirements for the dimensional accuracy and the position accuracy .

  LYHY bearings, especially the verticality of coaxiality and shoulder block seat hole or shaft neck, and in consideration of these problems, we must  pay attention to the high speed factors bearing in operation and high temperature factor.

  Shaft bearing system requires high rigidity,  as far as possible the light quality. In order to overcome this contradiction,we can  take measures  to improve the supporting stiffness ,such as reducing the surface roughness and improving the surface strengthening  , or using  hollow shaft to reduce the quality of the system etc.

Adjustable clearance design features of rolling ball bearings

The design features:

(1) manufacturing easy: Thanks to the adjustable intermediate links, so that parts of the process can be greatly relaxed tolerance zone size, the rejection rate also will drop exponentially. While reducing the accuracy of machine tools, the machining accuracy of machine tools in the general precision bearings possible. The technical level of the workers may be appropriate to reduce, with a certain economic benefits.

Convenient (2) assembling: the outer ring made after the split, you can easily adjust the radial wind power bearing clearance to the desired value, without the use of packet assembly method that is able to achieve high accuracy. Mounted on the shaft is also very easy to adjust without attaching other devices, simplifying the whole structure.

(3) to improve the situation by force: the double rows of rolling elements can increase the carrying capacity and can withstand axial force.

(4) reduce the types of parts: the outer ring made after the split, make rolling body covered in the fairway, so the cage can be omitted. This while reducing process, improve the carrying capacity, can be said to serve multiple purposes. Power Station Valve

(5) maintenance and repair easy: when the bearing clearance due to wear and tear caused by the ultra-poor, just appropriate to reduce the thickness of the shims can be reduced clearance, to restore the original accuracy, correspondingly prolong bearing life. In addition, when only the individual components of non-normal damage, can also be used to replace the damaged parts of the method to fix the bearing, or even the entire old as new, after all, a good way of reckoning. Deficiencies at 1.2

(1) increasing the inner cutting on the outer circumference, an externally threaded step. And easy to produce because of the presence of the thread stress concentration, while the heat 1P processing becomes difficult.

The axial dimension (2) of the flanged ball bearing is relatively large, and due to the randomness of the thickness of the adjusting washers have a greater volatility.

(3) for an outer thickened, so that an increase in material consumption.

Adjustable Rolling clearance presented here has the novel, reasonable structure, easy assembly, easy maintenance. Especially after the bearing outer ring from monolithic to modular axially split, so adjust the bearing clearance problems solved, for reference colleagues. The design can also be an extension of the idea to broaden to other types of bearing designs. The design of the case of non-standard bearing designs. There are many issues still need to explore deeper, deficiencies must be resolved. Truly eager to get peer guidance and help.

Thrust ball bearing noise judgment for maintenance checks

   In order to determine whether the removed bearing can be reused to wash clean after the thrust ball bearing checking. Carefully check the raceway, rolling surface, with the surface state of cage wear, increasing the bearing clearance and the presence or absence of injury on the dimensional accuracy of the decline, abnormal. Non-isolated type of small ball bearings, the inner ring with one hand support level, rotate the outer ring to confirm whether smooth.
   Tapered roller bearings and other separation-shaped high precision ball bearings, rolling elements can be, respectively, the outer ring raceway surface inspection.Large bearings because they can not rotate by hand, pay attention to check the rolling body raceway, cage, and other exterior wall surface, the importance of bearing the higher the more necessary to be careful inspection.
   Can be used to determine whether, considering the extent of damage thrust ball bearings, mechanical properties, the importance of operating conditions to be determined during the next overhaul. However, if the following defects can no longer use. Must manage new ones bearing.
   Bearing Manufacturing noise caused by factors although essentially due to a
manufacturing error, but in fact still with lubricant selection, installation conditions of the miniature ball bearings, shaft and housing accuracy states. This noise is divided into the cage and the sound of chatter sound categories, as described below:
   (1) cage sound and control with periodic vibration and noise, prone cage refers to violent vibration sound cage and rolling elements emitted shock and friction in the pocket loose big time. This noise occurs mainly in ball bearings and thrust ball bearings and stamping cage and solid cage will occur when using grease or oil lubrication occurs, but in poor lubrication or lubricant dried up, the radial clearance When the large, outer withstand torque loads, and poor cage structure and accuracy is not high, the more prone to severe cage webs or rivet head will suddenly break.
   The method of controlling noise and vibration cage there; use good lubrication performance lubricants; reduce installation errors bearings; compression bearing radial clearance or suitably axial preload, as well as the choice of having a reasonably good accuracy cage structure flanged ball bearing

, or switch to cage firmly and without worn bearings.
   (2) The sound and control chatter chatter sound is directly related to bearing rolling surface waviness related noise, which is a pure tone noise, for a constant speed, its frequency does not change, and for changing speed It also will change the frequency.  

 

Installation and adjustment of the high-speed bearings

   When fit and clearance high speed bearing both due to the high-speed precision bearings according to the requirements, but also by high-temperature bearing requirements, so considering its fit and clearance, to take into account the following points:
  (1) a dimensional change and hardness change from normal temperature was raised at a high temperature;
  (2) due to the centrifugal force at high speed, and change in shape.
In short, high-speed, high-temperature conditions, and clearance from the mating choice should strive to maintain the accuracy and performance of the bearing, which is difficult.
 In order to ensure the bearing raceway deformation after installation, angular contact ball bearings over the amount of interference can not get too much interference fit, while the heat under the centrifugal force and high temperature under high-speed expansion, or offset the mating surfaces of the normal pressure. Or the mating surface relaxation, and therefore the amount of interference must be calculated carefully consider the above two factors in the premise, at room temperature constant speed under effective amount of interference for high-speed bearings may be invalid.
   If the result of this contradiction is too large (usually only in the ultra-high speed only in this case), only to take measures to double the lubrication ring lubrication method and hydrostatic lubrication and use, and this program has the potential to break through the miniature ball bearings dmn value 3 million mark. Thermal expansion at high temperatures, or the mating surfaces to offset the normal pressure. Or the mating surface relaxation, and therefore the amount of interference must be calculated carefully consider the above two factors in the premise, at room temperature constant speed under effective amount of interference for high-speed bearings may be invalid.
   If the result of this contradiction is too large (usually only in the ultra-high speed only in this case), only to take measures to double the lubrication ring lubrication method and hydrostatic lubrication and use, and this program has the potential to break through the bearing dmn value 3 million mark. When considering the high speed bearing clearance only to consider the above factors, but also to consider the impact of thermal elongation axis clearance required bearing in working condition, that have the best clearance at operating temperature, and this species clearance is included,the exact center of the outer ring ball groove to the next state formation. Since the high-speed bearings reduce strive relative sliding and internal friction, angular contact ball bearings best not to use the inner and outer rings relative axial displacement method to adjust ball bearing clearance.
   In considering the amount of interference with the flanged ball bearing and the clearance, to be noted that the material becomes soft and easily deformable features, and many times from room temperature to high temperature changes caused by the possibility of a certain permanent

deformation at high temperatures.

Check the flanged ball bearing quality of four points

First, turn tone with a stethoscope to check flanged ball bearing, a metallic noise, strong noise, irregular, abnormal sound. Due to poor lubrication, shaft or housing poor accuracy, bearing damage, foreign intrusion etc..

Second, the bearing temperature, generally according to the external temperature of the bearing seat to speculate. But the direct measurement of the bearing outer ring with oil hole temperature more accurately. Thrust Ball Bearings temperature, from a running start rising, usually 1~2 hours after the temperature stability. Bad if the bearings are mounted, the temperature will rise sharply, abnormal high temperature. The reason such as excessive lubricant, the self aligning ball bearing clearance is too small, poor installation, sealing device too much friction. High speed rotating occasions, lubrication structure, choice is also the cause of the error.
Guide roller, guide, slider, linear bearings, miniature ball bearings series of deep groove ball bearing series needle roller (roller) bearings, thrust ball bearings

Third, small machinery can be rotated by hand, to confirm whether the rotation is smooth. Check the project caused by foreign body, scars, indentation running sluggish, due to poor installation, mounting process arising out of the bad moment is not stable, because the clearance is too small, installation error, sealing caused by friction force is too large and so on. If there is no anomaly can begin power operation.

Fourth, large machinery can not be manually rotated, so the no-load starting immediately after power cut, mechanical idling, check whether the vibration, noise, rotating parts are in contact and so on, confirmed no abnormal, into the dynamic operation.