ISO Bearings
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.
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.
![50 mm x 90 mm x 20 mm ISO NP210 cylindrical roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11111-50-mm-x-90-mm-x-20-mm-iso-np210-cylindrical-roller-bearings.jpg)
- 50 mm x 90 mm x 20 mm ISO NP210 cylindrical roller bearings
- Normal Duty
- Setscrew Ball Bearing
![533,4 mm x 635 mm x 50,8 mm ISO LL575343/10 tapered roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11107-533-4-mm-x-635-mm-x-50-8-mm-iso-ll575343-10-tapered-roller-bearings.jpg)
- 533,4 mm x 635 mm x 50,8 mm ISO LL575343/10 tapered roller bearings
- Normal Duty
- Grip Tight Ball Bearing
![17 mm x 26 mm x 7 mm ISO 63803-2RS deep groove ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11106-17-mm-x-26-mm-x-7-mm-iso-63803-2rs-deep-groove-ball-bearings.jpg)
- 17 mm x 26 mm x 7 mm ISO 63803-2RS deep groove ball bearings
- Normal Duty
- Setscrew Ball Bearing
![480 mm x 700 mm x 165 mm ISO 23096 KW33 spherical roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11104-480-mm-x-700-mm-x-165-mm-iso-23096-kw33-spherical-roller-bearings.jpg)
- 480 mm x 700 mm x 165 mm ISO 23096 KW33 spherical roller bearings
- Normal Duty
- Setscrew Ball Bearing
![15,875 mm x 53,975 mm x 21,839 mm ISO 21063/21212 tapered roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11107-15-875-mm-x-53-975-mm-x-21-839-mm-iso-21063-21212-tapered-roller-bearings.jpg)
- 15,875 mm x 53,975 mm x 21,839 mm ISO 21063/21212 tapered roller bearings
- Normal Duty
- Setscrew Ball Bearing
![280 mm x 380 mm x 100 mm ISO NN4956 cylindrical roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11110-280-mm-x-380-mm-x-100-mm-iso-nn4956-cylindrical-roller-bearings.jpg)
- 280 mm x 380 mm x 100 mm ISO NN4956 cylindrical roller bearings
- Normal Duty
- Setscrew Ball Bearing
![240 mm x 440 mm x 120 mm ISO NU2248 cylindrical roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11113-240-mm-x-440-mm-x-120-mm-iso-nu2248-cylindrical-roller-bearings.jpg)
- 240 mm x 440 mm x 120 mm ISO NU2248 cylindrical roller bearings
- Intermediate Duty
- Setscrew Ball Bearing
![ISO 7200 BDF angular contact ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11106-iso-7200-bdf-angular-contact-ball-bearings.jpg)
- ISO 7200 BDF angular contact ball bearings
- Normal Duty
- Setscrew Ball Bearing
![ISO 53417U+U417 thrust ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11274-iso-53417u-u417-thrust-ball-bearings.jpg)
- ISO 53417U+U417 thrust ball bearings
- Normal Duty
- Eccentric Collar Ball Bearing
![ISO 81107 thrust roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11105-iso-81107-thrust-roller-bearings.jpg)
- ISO 81107 thrust roller bearings
- Normal Duty
- Eccentric Collar Ball Bearing
![ISO 7017 CDT angular contact ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11108-iso-7017-cdt-angular-contact-ball-bearings.jpg)
- ISO 7017 CDT angular contact ball bearings
- Normal Duty
- Setscrew Ball Bearing
![40 mm x 90 mm x 23 mm ISO 20308 spherical roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11111-40-mm-x-90-mm-x-23-mm-iso-20308-spherical-roller-bearings.jpg)
- 40 mm x 90 mm x 23 mm ISO 20308 spherical roller bearings
- Normal Duty
- Setscrew Ball Bearing