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    "Metallurgical Bearing"

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    Maintenance of the bearing
    2015-08-10
    Check the bearing, don't let the ball and roller combined bearing exposed to contaminants or moisture environment. If the work is interrupted, should be oiled paper pieces of plastic or similar materials had the machine. In order to judge NTN bearings removed can re-use, to check on the size precision, accuracy of rotation, internal cleara... Check the bearing, don't let the ball and roller combined bearing exposed to contaminants or moisture environment. If the work is interrupted, should be oiled paper pieces of plastic or similar materials had the machine. In order to judge NTN bearings removed can re-use, to check on the size precision, accuracy of rotation, internal clearance and the matching surface, raceway, cage and sealing ring.On examination results, can be judged by using inertial bearing or bearing are proficient in.Criteria based on the mechanical properties and the important degree and inspection cycles and different. If the following injury, NTN bearings shall not be re used, must be replaced.A bearing parts of the fault and defect.B raceway surface rolling surface stripping material. View Details
    metallurgical bearing Effect of temperature on bearing life
    2015-07-31
    spherical ball bearings in the work, its size may be changed by changing the structure of the material. This transformation was affected by temperature, time and stress.In order to avoid the dimensional change not allowed due to changes in material structure in the work, bearing materials must go through a special heat treatment.According to the di... spherical ball bearings in the work, its size may be changed by changing the structure of the material. This transformation was affected by temperature, time and stress.In order to avoid the dimensional change not allowed due to changes in material structure in the work, bearing materials must go through a special heat treatment.According to the different types of metallurgical triple row roller slewing bearing, metallurgical bearing in standard hardenability and induction quenching heat treatment of steel, the recommended maximum working temperature is between 120 to 200 degrees. There is a direct relationship between the maximum operating temperature and the heat treatment process can be achieved. If the normal working temperature higher than the highest temperature of some application suggestions, bearing should choose stable series high. If the bearing of continuous working in high temperature, load capacity of the bearing may need to make adjustments. View Details
    multi row bearing
    2015-07-27
    (4) according to the number of rolling body, divided into:1) single row bearings -- with a rolling body bearing;2) double row bearings -- with two rows of rolling bodies bearing;3) multi row bearing - with more than two rows of rolling bodies bearing, such as the three column, four row bearings.(5) according to their components are respectively, di... (4) according to the number of rolling body, divided into:1) single row bearings -- with a rolling body bearing;2) double row bearings -- with two rows of rolling bodies bearing;3) multi row bearing - with more than two rows of rolling bodies bearing, such as the three column, four row bearings.(5) according to their components are respectively, divided into:1) respectively, has slim ball bearing respectively bearing bearing components;2) can not be separately - bearing in the final after supporting bearings, rings are not bearing any free respectively.(6) according to their structural shapes (such as with or without filling slots, with or without inner, outer ring and ring shape, structure, retaining edge veryTo non retaining frame) can also be divided into structural types.2 according to the rolling bearing size classification according to the outer diameter of bearing size, divided into:(1) the miniature bearing, nominal diameter for bearing size below 26mm;(2) small bearings -- nominal diameter Thin section bearings size scale for 28-55mm bearing;(3) small and medium-sized bearings, nominal diameter size scale for 60-115mm bearing;(4) in large bearing - Nominal outside diameter size scale for 120-190mm bearing(5) the large bearing - nominal diameter size scale for 200-430mm bearing;(6) extra large type bearing, nominal diameter size for the bearing more than 440mm.3 high precision bearings: robot bearings and CNC machine tool YRT turntable bearing(1) the robot bearing: thin-walled cross roller bearings, cross roller bearings, cylindrical roller in a V shaped groove 90 degreesThe rolling surface through the isolated blocks are arranged vertically, theTo cross roller bearings can bear radial load, axial load and torque load and multi direction load. The inner ring and the outer Deep groove ball bearing ring gauge"Is small, thin form is more close to the limit of smallType size, and has the advantages of high rigidity, and the precision can reach P5, P4, P2. (2) YRT rotary bearing, by a pushCentripetal force / seat, a thrust / radial shaft washer, a thrust washer, two needle roller and cage assemblies and a set of concentricCylindrical roller.Seat ring and the shaft ring with a screw hole with a uniform installation. This type of bearing with high axial and radial load capacity. View Details
    Bearings often arise
    2015-07-22
    1, the tile surface corrosion: spectral analysis found abnormal concentrations of non-ferrous metal linear plain bearings elements; iron spectrum appeared submicron wear particles of many non-ferrous metals; lubricants excessive moisture, acid exceeded. 2, the journal surface strain: iron spectrum in cutting abrasive or black iron oxide partic... 1, the tile surface corrosion: spectral analysis found abnormal concentrations of non-ferrous metal linear plain bearings elements; iron spectrum appeared submicron wear particles of many non-ferrous metals; lubricants excessive moisture, acid exceeded. 2, the journal surface strain: iron spectrum in cutting abrasive or black iron oxide particles, the presence of temper color metal surface.3, mobile crane bearing surface corrosion journal: spectral analysis found abnormal concentrations of iron, iron spectrum, there are many sub-micron particles of iron components, lubricants excessive moisture or acid value exceeded.4, the surface strain: iron spectrum were found to have cutting abrasive, abrasive ingredients for non-ferrous metals.5, tile back fretting: spectral analysis found abnormal concentrations of iron, iron spectrum, there are many sub-micron wear particles of iron components, lubricants water and acid value exception. View Details
    Three points about powder metallurgy bearing
    2015-03-09
    Powder metallurgy bearings can be in a long time do not need to add lubricating oil.Powder metallurgy bearing porosity is higher,( sealed bearing ) the more the more oil, but the pore, the intensity is low.Powder metallurgical bearing often in mixed lubrication, sometimes also can form a thin film lubrication, commonly used to add lubrica... Powder metallurgy bearings can be in a long time do not need to add lubricating oil.Powder metallurgy bearing porosity is higher,( sealed bearing ) the more the more oil, but the pore, the intensity is low.Powder metallurgical bearing often in mixed lubrication, sometimes also can form a thin film lubrication, commonly used to add lubricating oil and light load and low speed difficult situation. View Details
    Powder metallurgy bearing
    2015-03-09
    Powder metallurgical bearing is formed of pressing, sintering, shaping and immersion of the metal powder and other antifriction material powder,which have a porous structure, infiltration in hot oil, pore space is filled with lubricating oil, work due to the pumping action and frictional heating shaft neck rotation, so that the metal and thermal ex... Powder metallurgical bearing is formed of pressing, sintering, shaping and immersion of the metal powder and other antifriction material powder,which have a porous structure, infiltration in hot oil, pore space is filled with lubricating oil, work due to the pumping action and frictional heating shaft neck rotation, so that the metal and thermal expansion of the oil, the oil extrusion pore the friction surface, and lubrication, the bearing cooling, oil is sucked back into the pores( handpiece bearing ) . View Details