7921/DB/DF/DT_NTN 7921/DB/DF/DT进口轴承
NTN 7921/DB/DF/DT轴承,角接触球轴承1，此轴承型号本公司有现货，获取轴承内圈,外圈更多详细资料您可致电我司，NTN 7921/DB/DF/DT代号,基本尺寸,安装尺寸,基本额定载荷,精度等级,装配,轴承的图纸、样品、价格或者替换产品等！我们是NTN轴承最佳代理商，所售产品均为原装正品，请您放心购买！ 订购电话：0512-62658883
7921/DB/DF/DT轴承 结构尺寸参数
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系列角接触球轴承1
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型号7921/DB/DF/DT
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Boundarydimensions mm- d
- D
- B
- ·B
- rsmin2
- r1smin2
- 105
- 145
- 20
- 40
- 1.1
- 0.6
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Basic load ratings
- dynamic
- static
- dynamic
- static
- kN
- kgf
- Cr
- Cor
- Cr
- Cor
- 48.5
- 54.5
- 4,950
- 5,550
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Limiting speeds
- rpm
- grease
- oil
- 4,400
- 5,900
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Bearing numbers
- 7921
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Load center
- mm
- a
- 46
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Mass
- kg
- single
- .approx.
- 0.972
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Basic load ratings
- dynamic
- static
- dynamic
- static
- (duplex) kN
- (duplex) kgf
- Cr
- Cor
- Cr
- Cor
- 79.0
- 109
- 8,050
- 11,100
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Limiting speeds
- (duplex)
- rpm
- grease
- oil
- 3,500
- 4,700
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Bearing numbers2
- DB
- DF
- DT
- DB
- DF
- DT
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Abutment and fillet dimensions
mm
- da
- db
- Da
- Db
- ras
- r1as
- min
- min
- max
- max
- max
- max
- 112
- 112
- 138
- 140.5
- 1
- 0.6
- 角接触球轴承1系列 7921/DB/DF/DT图片
NTN7921/DB/DF/DT轴承 滚动轴承外环故障频率：BFOr≌0.4Nn滚动轴承内环故障频率：BFIr≌0.6Nn滚动轴承保持架故障频率：FTFr≌0.4N以上符号：n=滚动体数目。N=轴的转速。{TodayHot}注：1.滚动轴承没有滑动；2.滚动轴承几何尺寸没有变化；3.轴承外环固定不旋转.滚动轴承外环故障频率：BFOe≌N(0.5n-1.2)滚动轴承内环故障频率：BFIe≌N(0.5n+1.2)滚动轴承滚动体故障频率：BS