ˇg„ Ӣ
ˇg„ Ӣ
ˇg„ Ӣ
ˇg„ Ӣ
ˇg„ Ӣ
ˇg„ Ӣ
㽭܇S޹˾

  • <optgroup id="yhekw"><em id="yhekw"><pre id="yhekw"></pre></em></optgroup>
  • <span id="yhekw"><output id="yhekw"><nav id="yhekw"></nav></output></span>

    <optgroup id="yhekw"><em id="yhekw"><del id="yhekw"></del></em></optgroup><ol id="yhekw"><blockquote id="yhekw"></blockquote></ol>
  • <span id="yhekw"><output id="yhekw"><b id="yhekw"></b></output></span>

    㽭܇S޹˾
     
    ˇg„ Ӣ
     
    Cataloge download
     
     
     
    Technical Information >> Technical Information  

    Technical Information


    1. BEARING MATERIALS:

       Ring and Rolling Element s material:    Primarily, is used for the bearing rings and rolling elements. This bearing steel is heat treated by Vacuum quench.The general feature of the steels is highly purified, high hardness, anti-fatigue, anti-grinded,and the stability of the dimension.                      
          The standard material for ZL bearing rings, rollers and balls is vacuum-processed high carbon chromium steel allowing high quality consitency and long bearing service life. Material symbol is GCr15, which from Baogang Steel and Xingcheng Steel and its chemical composition is approximately the same as AISI 52100 specified in the USA, DIN 100 Cr6 in Germany, and BS 535A99 in England.

       Cage material:      The are mainly used for pressed cages of bearings. Depending on the purpose, brass, stainless steel or may be used. For machined cages, or carbon steel is used.

    CHEMICAL COMPOSITION OF BEARING STEEL

    Steel No.

    Symbol

    Chemical Composition (Wt%)

    Gcr15

    AISI 52100

    C
    0.95-1.05

    Cr
    1.30-1.65

    Si
    0.15-0.35

    Mn
    0.2-0.4

    P
    <0.027

    S
    <0.02


    THE COMPARISON TABLE FOR EACH STANDARD

    China

    ISO

    USA

    Japan

    Germany

    France

    Sweden

    GB

     

    AISI

    JIS

    DIN

    NF

     

    Gcr15

    683/xv11

    52100

    SUJ2

    100Cr6

    100C6

    SKF3

    һTAPERED ROLLER BEARING

    (1)The rings and rollers of ZL bearings are made of refined high carbon-chrome bearing steel-GCr15. (The contrast of Bearing Steel No. of each country) The cages are punch-pressed from super quality cold rolling steel sheet or having nylon cages. The seals are hot-pressed from oil-resistant bune-N rubber with phosphatizing steel skeleton. (2)Case hardened steel, pls kindly contact us for more information.

    PRECISION

          The precision of inch system bearing is classified in 4, 3, 2, 0 and 00 five grades Classes. 0,6/6X,5 and 4 apply to metric-system bearings.
    The relationship of classes to ISO tolerance classes, etc.

    Series

    Standard

    Bearing Class Designations

    Inch

    ANSI/ABMA std.19.2

    4

    2

    3

    0

    00

    Metric

    GB/T307.1

    0

    6X

    5

    4

     2

    ISO492

    0

    6X

    5

    4

    2

    ANSI/ABMA std.19.1

    K

    N

    C

    B

    A

    DIN 620

    0

    6X

    5

    4

    2

    JISB1514

    0

    6X

    5

    4

    2

    CLEARANCE                                                                                                                                                              

            The radial clearances of tapered bearings are divided into six groups as shown.            

    Bore diameter (mm)

    Group 1

    Group 2

    Normal

    Group 3

    Group 4

    Group 5

    Over

    to

    min

    max

    min

    max

    min

    max

    min

    max

    min

    max

    min

    max

    -

    30

    0

    10

    10

    20

    20

    30

    40

    50

    50

    60

    70

    80

    30

    40

    0

    12

    12

    25

    25

    40

    45

    60

    60

    75

    80

    95

    40

    50

    0

    15

    15

    30

    30

    45

    50

    65

    65

    80

    90

    110

    50

    65

    0

    15

    15

    30

    30

    50

    50

    70

    70

    90

    90

    120

    65

    80

    0

    20

    20

    40

    40

    60

    60

    80

    80

    110

    110

    150

    80

    100

    0

    20

    20

    45

    45

    70

    70

    100

    100

    130

    130

    170

        Special radial clearance or axial clearance requirement could be made as specified in orders.


    LUBRICATION

          The main purposes of bearing lubrication are to prevent metallic contact between the rolling elements, raceways, and cage, and also to prevent the bearing from corrosion and wear. Additional functions are sealing and cooling of the bearing.
          Bearing may be lubricated with grease or oil-in special cases with a solid lubricant-the choice of which depends primarily on the temperature range, operating speeds, and loading conditions of the bearings concerned.
          All lubricants must be changed from time to time because their properties deteriorate as a result of aging and contamination of the lubricants.
          The limiting speeds for both grease and oil lubrication are given

    Title

    No.

    Average Drops

    Working 25(77oF)

    Working T.

    Remarks

    1.  Shell

    Alvania R Grease

    R2

    185(365)

    265-295

    -30~120

    Lithium Grease

    R3

    185(365)

    220-250

    -30~120

    Alvania EP Grease

    EP1

    180(356)

    310-340

     

    Lithium EP Grease

    EP2

    185(365)

    265-295

    -25~110

    2.  Mobil oil

    Mobil Grease

    22

    192?378?

    274

    -40~120

     

    EP2

    190(374)

    280

    -25~110

    3.  Esso

    Andok

    C

    260(500)

    190-210

    -30~150

     

    Beacon

    325

    190(374)

    280

    -55~120

     

    BALL BEARING

    CAGES
    In general, ZL cages are pressed steel ribbon cages & pressed steel snap cages. For wheel hub bearings and A/C beairngs, the cages are made from Nylon 66 with glass fiber.


    SHIELDS & SEALS
    The standard seals are made of oil and wear-resistant nitrile rubber(NBR) with a sheet steel reinforcement. SPCC is the standard material for shields we apply.


    LUBRICATION
    The grease can be applied upon customer's requirements. In general, Alvania R 2 is used for FKG small ball bearing. RONEX MP from ESSO Co. and ALVANIA R3 from SHELL are used for wheel hub bearings.
    Details as per our grease conversion table


    2. BEARING TOLERANCE & ACCURACY
    Bearing accuracy consists of dimensional accuracy and running accuracy. The normal grade is P0,a higher grade is P6 and P2 is the highest grade.
    Accuracy Grade Standard Conversion Table

    Country

    Standard

    Tolerance Grade

    China

    GB/GB307.1

    0

    6

    5

    4

    American

    ANSI

    ABEC-1

    ABEC-3

    ABEC-5

    ABEC-7

     

    ISO

    0

    6

    5

    4

    Germany

    DIN

    P0

    P6

    P5

    P4

    Japan

    JIS

    P0

    P6

    P5

    P4


    3. INTERNAL CLEARANCE

    The radial internal clearance of a bearing is of considerable importance, if satisfactory operation is to be obtained, as it greatly influences beairng performance including fatige life, vibration, noise, heat generation, etc.
    The radial clearances of ZL bearings can be classified into C2, Standard, C3, C4 & C5

    RADIAL CLEARANCE TABLE (m)

    Bore Diameter

    C2

    Standard

    C3

    C4

    C5

    over

    incl

    min

    max

    min

    max

    min

    max

    min

    max

    min

    max

    10

    18

    0

    9

    3

    18

    11

    25

    18

    33

    25

    45

    18

    24

    0

    10

    5

    20

    13

    28

    20

    36

    28

    48

    24

    30

    1

    11

    5

    20

    13

    28

    23

    41

    30

    53

    30

    40

    1

    11

    6

    20

    15

    33

    28

    46

    40

    64

    40

    50

    1

    11

    6

    23

    18

    36

    30

    51

    46

    76

    NOTE
    1. Standard clearance is C0.
    2. C2 Group clearance only for bearings over ABEC-3 accurancy.
    4. VIBRATION AND NOISE
    The vibration and noise of bearings are classified in four classes Z1, Z2, Z3, and Z4. It is measured by the instrument of S0910-1. For special requirement, it is measured by BVT-1 and classified as V1, V2, V3 , and V4.
    The data are shown in the following tables, different vibration and noise requirement should be mentioned in order.
    MAXIMUM VIBRATION ACCELERATION OF SINGLE BEARING(Tolerance in dB)

     

    The Grease No and Function(Table 7)
    Manufacturer Brand Drop point Consistency Operating   Tem  range Selection Criteria NMB
    Code
    Shell    Alvania R2 185 265-295 -35+120 general purpose
       Darina 2 250 265-295 -25+150 general purpose
    Chevron    SRI-2 240 255-280 -30+120 water resistant
    Mobil    Mobilux 2 190 265-290 -10+110 genreal purpose
       Mobil 22 192 250-274 -40+120 general purpose
       Mobil 28 260 265-295 -55+175 wide range Temperature 
       Mobil 48 260 240-270 -60+170 high temperature grease
    Esso    Beacon 325 193 290 -60+120 low-temperature grease LG20
        Polyrex EM 260 288 -40+180 high temperature low noise
        Andok B 260 280 -40+120 normal temperature grease LG38
        Andok 260 200 250 -30+150 normal temperature grease LG71
        Arapen RB300 200 250 -30+100 normal temperature grease
        UNIREX N2 250 280 -40+180 high temperature low noise
        Polyrex EP2 280 280 -40+180 high temperature low noise
        UNIREX N3 250 235 -40+180 high temperature low noise
    Kyodo Yushi     Multemp PS2 189 280 -50+110    low-temperature grease LY72
        Multemp SRL 191 245 -40+150    low noise grease LY121
        Multemp SC-A 260 280 0+160 normal temperature grease
        Multemp ET150 260 280 -10+160 normal temperature grease
        Oneluba 198 270 -10+110 normal temperature grease
        Adrex 198 300 -10+120 normal temperature grease
        Parmax 180 300 -10+120 normal temperature grease
        Emalube 1130 260 300 -10+130 normal temperature grease
        Unilube DL1 185 332 -10+110 normal temperature grease
        Alumix HD1 247 335 0+120 normal temperature grease
        Multemp LTS 250 201 -60+130 low-temperature grease
        Multemp SRH 250 201 -40+150 low-temperature grease
        Multemp SB-M 220 260 -40+200 high temperature high speed grease
        Multemp SC-C 280 300 -40+200 high temperature pump-water grease
        ET-K 260 300 -40+200 high temperture high speed alternators grease
    Kluber      Staburage NBU12 220 270 -35+150 normal temperature grease
    I    Sofled NBU15 220 280 -30+130 normal temperature grease
         Asonic GLY32 190 265-295 -50+140 low-temperature grease
         Asonic GHY72 250 250-280 -40+180 high temperature low noise
      Isoflex SuperLds18 190 280 -60+130 low-temperature grease LY218
      Isoflex Super TEL -65+70 low-temperature grease

      Isoflex LDS18  Special A

    190 280 -60+130 low-temperature grease
    Isoflex PDB38 CX100 -70+120 low-temperature grease
    Barrierta IMI/V 280 -50+220 high-low temperature grease
    Isoflex Topas NB52 204 280 -60+170 high-low temperature grease
    Barrierta L55/2 280 -35+260 high-low temperature grease

         Barrierta EL

    280 -50+180 high-low temperature grease
    Asonic HQ72-102 240 250-280 -40+180 high-low temperature and low noise grease
      Barrierta TK44N2 -60+230 high-low temperature grease
    Isoflex NCA15 180 265-295 -40+130 high speed grease
    Petamo GHY443 250 250-280 -20+180 high temperature longevity grease
    Petamo GHY133 240 250-280 -25+150 normal temperature grease
    China Hangu

           Hangu 2

    198 265-295 -10+130 low noise serive
    Dow Corning Molykote 33M 210 260 -70+180 high-low temperature grease LY81
    Molykote 44M 204 260 -40+200 high temperature grease LY13
    Molykote 55M -55+165 low-temperature grease LY52

    Click7879  Input time2008-11-1 Printing   
     
    Copyright @ Zhejiang Zhengda Bearing Co., Ltd
    Add: Weiliu Road, Yanpan Industrial Zone, Yueqing, City, Zhejiang Province, China 325600
    Tel: 0086-0577-62665670/62665675/62665678 Mobile: 0086-13634216230 Fax: 0086-0577-62665679
    Email: Email: [email protected] [email protected]http://www.live166.com
    欧美人与动zozo_成年污片免费视频网站_老年妇女婬秽视频_日本亚欧洲色视频免费
    ˇg„ Ӣ