7921/DB/DF/DT_NTN 7921/DB/DF/DT進(jìn)口軸承

NTN 7921/DB/DF/DT軸承,角接觸球軸承1，此軸承型號(hào)本公司有現(xiàn)貨，獲取軸承內(nèi)圈,外圈更多詳細(xì)資料您可致電我司，NTN 7921/DB/DF/DT代號(hào),基本尺寸,安裝尺寸,基本額定載荷,精度等級(jí),裝配,軸承的圖紙、樣品、價(jià)格或者替換產(chǎn)品等！我們是NTN軸承最佳代理商，所售產(chǎn)品均為原裝正品，請(qǐng)您放心購(gòu)買(mǎi)！訂購(gòu)電話：0512-62658883

7921/DB/DF/DT軸承結(jié)構(gòu)尺寸參數(shù)

系列

角接觸球軸承1
型號(hào)

7921/DB/DF/DT
Boundarydimensions mm
- d
- D
- B
- ·B
- r_smin2
- r_1smin2
- 105
- 145
- 20
- 40
- 1.1
- 0.6
Basic load ratings
- dynamic
- static
- dynamic
- static
- kN
- kgf
- Cr
- Cor
- Cr
- Cor
- 48.5
- 54.5
- 4,950
- 5,550
Limiting speeds
- rpm
- grease
- oil
- 4,400
- 5,900
Bearing numbers
- 7921
Load center
- mm
- a
- 46
Mass
- kg
- single
- .approx.
- 0.972
Basic load ratings
- dynamic
- static
- dynamic
- static
- (duplex) kN
- (duplex) kgf
- Cr
- Cor
- Cr
- Cor
- 79.0
- 109
- 8,050
- 11,100
Limiting speeds
- (duplex)
- rpm
- grease
- oil
- 3,500
- 4,700
Bearing numbers2
- DB
- DF
- DT
- DB
- DF
- DT
Abutment and fillet dimensions
- mm
- da
- db
- Da
- Db
- r_as
- r_1as
- min
- min
- max
- max
- max
- max
- 112
- 112
- 138
- 140.5
- 1
- 0.6
角接觸球軸承1系列 7921/DB/DF/DT圖片

NTN7921/DB/DF/DT軸承滾動(dòng)軸承外環(huán)故障頻率：BFOr≌0.4Nn滾動(dòng)軸承內(nèi)環(huán)故障頻率：BFIr≌0.6Nn滾動(dòng)軸承保持架故障頻率：FTFr≌0.4N以上符號(hào)：n=滾動(dòng)體數(shù)目。N=軸的轉(zhuǎn)速。{TodayHot}注：1.滾動(dòng)軸承沒(méi)有滑動(dòng)；2.滾動(dòng)軸承幾何尺寸沒(méi)有變化；3.軸承外環(huán)固定不旋轉(zhuǎn).滾動(dòng)軸承外環(huán)故障頻率：BFOe≌N(0.5n-1.2)滾動(dòng)軸承內(nèi)環(huán)故障頻率：BFIe≌N(0.5n+1.2)滾動(dòng)軸承滾動(dòng)體故障頻率：BS