NNU4921/NNU4921K/NN4921/NN4921K_NTN NNU4921/NNU4921K/NN4921/NN4921K進(jìn)口軸承

NTN NNU4921/NNU4921K/NN4921/NN4921K軸承,雙列圓柱滾子軸承，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 NNU4921/NNU4921K/NN4921/NN4921K配合安裝尺寸,基本尺寸,滾子粒數(shù),NNU4921/NNU4921K/NN4921/NN4921K價(jià)格,外形尺寸,錐度,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！訂購(gòu)電話：0512-62658883

NNU4921/NNU4921K/NN4921/NN4921K軸承結(jié)構(gòu)尺寸參數(shù)

系列

雙列圓柱滾子軸承
型號(hào)

NNU4921/NNU4921K/NN4921/NN4921K
Boundarydimensions
mm
- d
- D
- B
- r_smin2
- 105
- 145
- 40
- 1.1
Basic load ratings
- dynamic
- static
- dynamic
- static
- kN
- kgf
- Cr
- Cor
- Cr
- Cor
- 133
- 268
- 13,500
- 27,400
Limiting speeds
- rpm
- grease
- oil
- 4,100
- 4,800
Bearing numbers
- type NNU
- type NN
- cylindrical bore
- tapered bore
- cylindrical bore
- tapered bore
- NNU4921―
- NNU4921K
- NN4921
- NN4921K
Dimensions
- mm
- Fw
- Ew
- max
- max
- 118
- 134
Abutment and fillet dimensions
- mm
- d_a
- d_b
- d_c
- d_d
- Da
- D_b
- min
- min
- max
- min
- min
- max
- min
- r_{as max}
- 111.5
- 115
- 116
- 120
- 138.5
- 138.5
- 136
- 1
Mass
- kg
- type NNU
- type NN
- cylindrical bore
- tapered bore
- cylindrical bore
- tapered bore
- 1.91
- 1.82
- 1.82
- 1.73
雙列圓柱滾子軸承系列 NNU4921/NNU4921K/NN4921/NN4921K圖片

NNU4921/NNU4921K/NN4921/NN4921K軸承 1、保持器聲“唏利唏利……” 原因分析：由保持器與滾動(dòng)體振動(dòng)、沖撞產(chǎn)生，不管潤(rùn)滑脂種類如何都可能產(chǎn)生，承受力矩、負(fù)荷或徑向游隙大的時(shí)候更容易產(chǎn)生解決方法： A、提高保持器精 B、選用游隙小的軸承或?qū)︔S承施加預(yù)負(fù)荷 C、降低力矩負(fù)荷，減少安裝誤差