雙列短圓柱NN 30系列與NN 49系列
SKF制造的超精密雙列圓柱滾子軸承標(biāo)準(zhǔn)系列為NN 30和NNU 49系列 。
此兩系列軸承采用圓柱孔或1:12的錐孔（代號后綴K）。在機床應(yīng)用中，具有錐孔的圓柱滾子軸承優(yōu)于圓柱孔軸承，因為錐面能夠在安裝過程中精確地調(diào)整游隙和預(yù)載荷。
NN 30系列
NN 30系列軸承可以在承載能力、剛性和轉(zhuǎn)速之間提供一個獨特的平衡，因此，一般用作機床主軸驅(qū)動端軸承。NN 30系列軸承內(nèi)圈有三個整體擋邊，而外圈無擋邊。
NNU 49系列
NNU 49系列軸承的截面高度非常低，這種設(shè)計比NN 30系列軸承具有更高的剛度，但承載能力稍差。
NN 49系列軸承外圈有三個整體擋邊，而內(nèi)圈無擋邊。
典型應(yīng)用NN 30..系列
NN 30系列與NNU 49系列型號
| NN 30系列 | NNU 49系列 |
| NN 3005/SP | NNU 4930BK/SPW33 |
| NN 3005K/SP | NNU 4932B/SPW33 |
| NN 3006KTN/SP | NNU 4934B/SPW33 |
| NN 3006TN/SP | NNU 4936B/SPW33 |
| NN 3007/SP | NNU 4938B/SPW33 |
| NN 3007K/SP | NNU 4940B/SPW33 |
| NN 3008KTN/SP | NNU 4944B/SPW33 |
| NN 3008TN/SP | NNU 4948B/SPW33 |
| NN 3009KTN/SP | NNU 4952B/SPW33 |
| NN 3009TN/SP | NNU 4956B/SPW33 |
| NN 3010KTN/SP | NNU 4960B/SPW33 |
| NN 3010TN/SP | NNU 4964B/SPW33 |
| NN 3011KTN/SP | NNU 4968B/SPW33 |
| NN 3011TN/SP | NNU 4972B/SPW33 |
| NN 3012KTN/SP | NNU 4976B/SPW33 |
| NN 3012TN/SP | NNU 4980B/SPW33 |
| NN 3013KTN/SP | NNU 4984B/SPW33 |
| NN 3013TN/SP | NNU 4920B/SPW33 |
| NN 3014KTN/SP | NNU 4920BK/SPW33 |
| NN 3014TN/SP | NNU 4921B/SPW33 |
| NN 3015KTN/SP | NNU 4921BK/SPW33 |
| NN 3015TN/SP | NNU 4922B/SPW33 |
| NN 3016KTN/SP | NNU 4922BK/SPW33 |
| NN 3016TN/SP | NNU 4924B/SPW33 |
| NN 3017KTN9/SP | NNU 4924BK/SPW33 |
| NN 3017TN9/SP | NNU 4926B/SPW33 |
| NN 3018KTN9/SP | NNU 4926BK/SPW33 |
| NN 3018TN9/SP | NNU 4928B/SPW33 |
| NN 3019KTN9/SP | NNU 4928BK/SPW33 |
| NN 3019TN9/SP | NNU 4930B/SPW33 |
| NN 3020KTN9/SP | NNU 4932BK/SPW33 |
| NN 3020TN9/SP | NNU 4934BK/SPW33 |
| NN 3021KTN9/SP | NNU 4936BK/SPW33 |
| NN 3021TN9/SP | NNU 4938BK/SPW33 |
| NN 3022KTN9/SP | NNU 4940BK/SPW33 |
| NN 3022TN9/SP | NNU 4944BK/SPW33 |
| NN 3024KTN9/SP | NNU 4948BK/SPW33 |
| NN 3024TN9/SP | NNU 4952BK/SPW33 |
| NN 3026KTN9/SP | NNU 4956BK/SPW33 |
| NN 3026TN9/SP | NNU 4960BK/SPW33 |
| NN 3028K/SPW33 | NNU 4964BK/SPW33 |
| NN 3030K/SPW33 | NNU 4968BK/SPW33 |
| NN 30324K/SPW33 | NNU 4972BK/SPW33 |
| NN 3034K/SPW33 | NNU 4976BK/SPW33 |
| NN 3036K/SPW33 | NNU 4980BK/SPW33 |
| NN 3038K/SPW33 | NNU 4984BK/SPW33 |
| NN 3040K/SPW33 | NNU 4992B/SPW33 |
| NN 3044K/SPW33 | NNU 4992BK/SPW33 |
| NN 3048K/SPW33 | NNU 49/500B/SPW33X |
| NN 3052K/SPW33 | NNU 49/500BK/SPW33X |
| NN 3056K/SPW33 | NNU 49/600B/SPW33X |
| NN 3060K/SPW33 | NNU 49/600BK/SPW33X |
| NN 3064K/SPW33 | NNU 49/670B/SPW33X |
| NN 3068K/SPW33 | NNU 49/670BK/SPW33X |
| NN 3072K/SPW33 | |
| NN 3076K/SPW33 | |
| NN 3080K/SPW33 | |
| NN 3084K/SPW33 | |
| NN 3092K/SPW33 |