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応用と说明


材料 Material
    The ring and balls of SFB bearings are made of refining bearing steel GCr15(AISI 52100),the retainer are punched from brass strip(H62)or top quality cold-rolled steel strip(SPCC BQB402)and reinforced engineering plastics are available if necessary.The shield is made of imported special material or (SPCC JISG3141)stainless steel (ICr18Ni9)strip and the bune-N rubber seal with phosphatizing steel skeleton are hot pressed. The stainless steel bearing"s ring and balls refining stainless 9Crl8(AISI 440C). :
钢号Steel No C% Si% Mn% S% P% Cr%
GCr15 0.95-1.05 0.15-0.3 0.25-0.45 <0.025 <0.025 1.3-1.6
9Cr18 0.90-1.05 <0.8 <0.8 <0.04 <0.03 16-19

Packing
    Generally SFB Bearing is to be packed in the plastic pipes or the thin membrane bags(10 sets).then to be packed into the medium size Paper Box(50 sets or 100 sets).Then all to be packed in to the carton as the external packing Small. The users who have any requirements in packing may write them down in the contract.

精度 Tolerance
    SFB bearings are of motor class bearings and the common tolerance is shown on the attached data sheet.For any special tolerance indicated on the purchase order,custom-built service is available.

公差级别比较
    Comparisiion Table Of Tolerance Grade:
国别Country 标准Standard 公差级别Tolerance Grade
China GB 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

径向游隙Radial Play
    轴承的径向游隙按照国家标准GB4604规定为五组,如下表所示:
轴承内径 第2组C2 基本组 第3组C3 第4组C4 第5组C5
bearing bore(mm) group 2-C2 C0basic group C0 group 3-C3 group 4-C4 group 5-C5
超过 最小 最大 最小 最大 最小 最大 最小 最大 最小 最大
over inct. min max min max min max min max min max
2.5 6 0 7 2 13 8 23 14 29 20 37
6 10 0 7 2 13 8 23 18 33 25 45
10 18 0 8 3 18 11 25 20 36 28 48
18 24 0 10 5 20 13 28 23 41 30 53
24 30 1 11 5 20 13 28 28 43 40 64
30 40 1 11 6 20 15 33        

    特殊的径向游隙或轴向游隙要求,可按订货规定生产。
振动和噪音
    深沟球轴承加速度振动值(dB)见表1
    深沟球轴承速度级,振动值(μm/s)见表2
    表1单个轴承振动加速度级(dB)不超过
轴承内径 直径系列(0) 直径系列(2) 直径系列(3)
bearing bore mm Z Z1 Z2 Z3 Z Z1 Z2 Z3 Z4 Z Z1 Z2 Z3 Z4
3 35                         -
4 35 34 32 28 36 35 32 30 - 37 36 33 31 -
5 37 34 32 28 36 35 32 30 - 37 36 33 31 -
6 37 36 34 30 38 37 34 32 - 39 37 35 33 -
7 39 36 34 30 38 37 34 32 - 39 37 35 33 -
8 39 38 35 31 40 38 36 34 - - - - - -
9 41 38 35 31 40 38 36 34 - - - - - -
10 43 40 36 32 42 40 37 35 - - - - - 32
12 44 42 38 33 44 42 39 35 30 46 44 40 37 32
15 45 43 39 34 45 43 39 35 30 47 45 40 37 33
17 46 44 40 35 46 44 41 36 31 48 46 42 38 33
20 47 44 40 35 47 45 41 36 31 49 47 42 38 34
25 48 45 41 36 48 46 42 38 33 50 48 43 39 37
30 49 46 42 38 49 47 43 40 36 51 49 44 41 38
35 51 47 43 39 50 48 44 41 37 52 50 45 42 40
40 53 49 45 41 52 50 46 43 39 54 52 47 44 41
45 55 51 46 42 54 52 47 44 40 56 54 49 45 44
50 57 53 48 45 56 54 49 46 43 58 56 51 47 46
55 59 54 50 47 58 55 51 48 45 60 57 53 49 48
60 61 56 52 49 60 57 53 50 47 62 59 54 51 50
    58 54 51 62 59 54 51 48 64 61 56 53  
 

表2 单个轴承振动速度级允许极限值
轴承公称内径 V V1 V2 V3
Bore Diameter
d mm
  低频带 中频带 高频带 低频带 中频带 高频带 低频带 中频带 高频带 低频带 中频带 高频带
  Low Brand Medium Brand High Brand Low Brand Medium Brand High Brand Low Brand Medium Brand High Brand Low Brand Medium Brand High Brand
                         
                         
                         
5 110 72 60 90 60 50 58 36 30 35 21 18
6 110 72 60 90 60 50 58 36 30 35 21 18
7 130 96 80 110 80 65 72 48 40 44 28 24
8 130 96 80 110 80 65 72 48 40 44 28 24
9 130 96 80 110 80 65 72 48 40 44 28 24
                         
10 160 120 100 140 100 85 90 60 50 55 35 30
12 160 120 100 140 100 85 90 60 50 55 35 30
15 210 150 120 180 130 100 110 78 60 65 46 35
17 210 150 120 180 130 100 110 78 60 65 46 35
20 260 190 150 220 160 125 130 100 75 80 60 45
                         
22 260 190 150 220 160 125 130 100 75 80 60 45
25 260 190 150 220 160 125 130 100 75 80 60 45
28 260 190 150 220 160 125 130 100 75 80 60 45
30 300 240 190 250 200 160 150 120 100 90 75 60
32 300 240 190 250 200 160 150 120 100 90 75 60
35 300 240 190 250 200 160 150 120 100 90 75 60
                         
40 360 300 260 300 250 220 180 150 130 110 90 80