ISO Bearings
Standard Internal Radial Clearance values for deep groove ball, cylindrical roller, and spherical roller bearings are found in Tables XV through XXII. Please note that there are different standards for metric deep groove ball bearings and inch ball bearings, as well as ISO cylindrical roller bearings and domestic cylindrical roller bearings. Also, the IRC values differ for straight bore bearings versus bearings with a tapered bore. There are no standards for tapered roller bearings. “Clearance” values for these bearings are expressed axially as “lateral” or “Bench End Play” (BEP) and are designed and specified for each application.
A word of caution, regarding IRC for those selecting ISO deep groove ball, cylindrical roller, and spherical roller bearings, is the “Normal” IRC shown in the tables for these bearings is not sufficient for these bearings if the bearing employs a “heavy” shaft fit. A heavy fit in most cases requires a “C3” IRC as a bearing with a “Normal” IRC could be too tight. A light to medium fit with a relatively high operating speed that generates heat also requires a “C3” IRC. If both a heavy fit is used along with a high speed, a “C4” IRC is typically required. Very few bearings with “Normal” IRC are used or stocked, with “C3” bearings being the most popular. For complicated applications, we recommend that users of our bearings contact our sales department for specific fitting and clearance recommendations.
![190 mm x 340 mm x 55 mm 190 mm x 340 mm x 55 mm ISO 7238 C angular contact ball bearings](https://m.ctrciec.cn/uploaded_images/d11844-190-mm-x-340-mm-x-55-mm-190-mm-x-340-mm-x-55-mm-iso-7238-c-angular-contact-ball-bearings.jpg)
![140 mm x 190 mm x 24 mm 140 mm x 190 mm x 24 mm ISO NJ1928 cylindrical roller bearings](https://m.ctrciec.cn/uploaded_images/d11838-140-mm-x-190-mm-x-24-mm-140-mm-x-190-mm-x-24-mm-iso-nj1928-cylindrical-roller-bearings.jpg)
![31,75 mm x 69,012 mm x 19,583 mm 31,75 mm x 69,012 mm x 19,583 mm ISO 14125A/14276 tapered roller bearings](https://m.ctrciec.cn/uploaded_images/d11836-31-75-mm-x-69-012-mm-x-19-583-mm-31-75-mm-x-69-012-mm-x-19-583-mm-iso-14125a-14276-tapered-roller-bearings.jpg)
![ISO NK55/25 needle roller bearings](https://m.ctrciec.cn/uploaded_images/d11843-iso-nk55-25-needle-roller-bearings.jpg)
- ISO NK55/25 needle roller bearings
- 6340-M
- 200x420x80
![60 mm x 130 mm x 46 mm 60 mm x 130 mm x 46 mm ISO 2312 self aligning ball bearings](https://m.ctrciec.cn/uploaded_images/d11842-60-mm-x-130-mm-x-46-mm-60-mm-x-130-mm-x-46-mm-iso-2312-self-aligning-ball-bearings.jpg)
- 60 mm x 130 mm x 46 mm 60 mm x 130 mm x 46 mm ISO 2312 self aligning ball bearings
- CRO-13708
- 685.8x876.3x352.425
![10 mm x 12,9 mm x 14 mm 10 mm x 12,9 mm x 14 mm ISO SA 10 plain bearings](https://m.ctrciec.cn/uploaded_images/d11843-10-mm-x-12-9-mm-x-14-mm-10-mm-x-12-9-mm-x-14-mm-iso-sa-10-plain-bearings.jpg)
- 10 mm x 12,9 mm x 14 mm 10 mm x 12,9 mm x 14 mm ISO SA 10 plain bearings
- HM959700
- HM959740DW
![180 mm x 320 mm x 52 mm 180 mm x 320 mm x 52 mm ISO 6236 ZZ deep groove ball bearings](https://m.ctrciec.cn/uploaded_images/d11844-180-mm-x-320-mm-x-52-mm-180-mm-x-320-mm-x-52-mm-iso-6236-zz-deep-groove-ball-bearings.jpg)
![380 mm x 620 mm x 194 mm 380 mm x 620 mm x 194 mm ISO 23176 KCW33+H3176 spherical roller bearings](https://m.ctrciec.cn/uploaded_images/d11838-380-mm-x-620-mm-x-194-mm-380-mm-x-620-mm-x-194-mm-iso-23176-kcw33-h3176-spherical-roller-bearings.jpg)
![70 mm x 110 mm x 71 mm 70 mm x 110 mm x 71 mm ISO NNU6014 V cylindrical roller bearings](https://m.ctrciec.cn/uploaded_images/d11841-70-mm-x-110-mm-x-71-mm-70-mm-x-110-mm-x-71-mm-iso-nnu6014-v-cylindrical-roller-bearings.jpg)
- 70 mm x 110 mm x 71 mm 70 mm x 110 mm x 71 mm ISO NNU6014 V cylindrical roller bearings
- 4T-5584/5535
- 63.5x122.238x43.658