NNU4948/NNU4948K/NN4948/NN4948K_NTN NNU4948/NNU4948K/NN4948/NN4948K進(jìn)口軸承

NTN NNU4948/NNU4948K/NN4948/NN4948K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 NNU4948/NNU4948K/NN4948/NN4948K配合安裝尺寸,基本尺寸,滾子粒數(shù),NNU4948/NNU4948K/NN4948/NN4948K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

NNU4948/NNU4948K/NN4948/NN4948K軸承結(jié)構(gòu)尺寸參數(shù)

系列

雙列圓柱滾子軸承
型號(hào)

NNU4948/NNU4948K/NN4948/NN4948K
Boundarydimensions
mm
- d
- D
- B
- r_smin2
- 240
- 320
- 80
- 2.1
Basic load ratings
- dynamic
- static
- dynamic
- static
- kN
- kgf
- Cr
- Cor
- Cr
- Cor
- 610
- 1,410
- 62,500
- 144,000
Limiting speeds
- rpm
- grease
- oil
- 1,700
- 2,000
Bearing numbers
- type NNU
- type NN
- cylindrical bore
- tapered bore
- cylindrical bore
- tapered bore
- NNU4948
- NNU4948K
- NN4948
- NN4948K
Dimensions
- mm
- Fw
- Ew
- max
- max
- 265
- 301
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}
- 251
- 258
- 262
- 269
- 309
- 309
- 304
- 2
Mass
- kg
- type NNU
- type NN
- cylindrical bore
- tapered bore
- cylindrical bore
- tapered bore
- 17.2
- 16.4
- 16.4
- 15.6
雙列圓柱滾子軸承系列 NNU4948/NNU4948K/NN4948/NN4948K圖片

NNU4948/NNU4948K/NN4948/NN4948K軸承一：陶瓷球加工技術(shù)難點(diǎn)：因現(xiàn)有加工設(shè)備是基于鋼球加工設(shè)計(jì)制造的，需對(duì)其進(jìn)行改造，磨料種類和研磨板及其技術(shù)條件要進(jìn)行合理選擇，批量加工工藝參數(shù)要進(jìn)行優(yōu)化。加工陶瓷球的技術(shù)關(guān)鍵和難點(diǎn)是： 1、提高陶瓷球的自轉(zhuǎn)性能； 2、提高研磨介質(zhì)及磨料的附著性能力； 3、批量加工在線檢測(cè)和質(zhì)量控制。 &nb