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.
![82,55 mm x 133,35 mm x 29,769 mm ISO 495/492A tapered roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11112-82-55-mm-x-133-35-mm-x-29-769-mm-iso-495-492a-tapered-roller-bearings.jpg)
- 82,55 mm x 133,35 mm x 29,769 mm ISO 495/492A tapered roller bearings
- 215 Series
- Non-Expansion
![ISO 54236 thrust ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11108-iso-54236-thrust-ball-bearings.jpg)
- ISO 54236 thrust ball bearings
- Normal Duty
- Setscrew Ball Bearing
![180 mm x 320 mm x 70 mm ISO GE180AW plain bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11107-180-mm-x-320-mm-x-70-mm-iso-ge180aw-plain-bearings.jpg)
- 180 mm x 320 mm x 70 mm ISO GE180AW plain bearings
- Normal Duty
- Setscrew Ball Bearing
![ISO 7005 BDT angular contact ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11113-iso-7005-bdt-angular-contact-ball-bearings.jpg)
- ISO 7005 BDT angular contact ball bearings
- Normal Duty
- Setscrew Ball Bearing
![710 mm x 870 mm x 95 mm ISO NP28/710 cylindrical roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11104-710-mm-x-870-mm-x-95-mm-iso-np28-710-cylindrical-roller-bearings.jpg)
- 710 mm x 870 mm x 95 mm ISO NP28/710 cylindrical roller bearings
- Normal Duty
- Setscrew Ball Bearing
![6 mm x 19 mm x 6 mm ISO 126 self aligning ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11110-6-mm-x-19-mm-x-6-mm-iso-126-self-aligning-ball-bearings.jpg)
- 6 mm x 19 mm x 6 mm ISO 126 self aligning ball bearings
- Normal Duty
- Setscrew Ball Bearing
![ISO 7336 ADT angular contact ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11111-iso-7336-adt-angular-contact-ball-bearings.jpg)
- ISO 7336 ADT angular contact ball bearings
- HEAVY DUTY
- 12.0000 in
![80 mm x 180 mm x 82,6 mm ISO UCFL216 bearing units](https://m.jiaji-kuaiyun.cn/uploaded_images/d11105-80-mm-x-180-mm-x-82-6-mm-iso-ucfl216-bearing-units.jpg)
- 80 mm x 180 mm x 82,6 mm ISO UCFL216 bearing units
- Normal Duty
- Setscrew Ball Bearing
![150 mm x 190 mm x 20 mm ISO 61830 deep groove ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11112-150-mm-x-190-mm-x-20-mm-iso-61830-deep-groove-ball-bearings.jpg)
- 150 mm x 190 mm x 20 mm ISO 61830 deep groove ball bearings
- Normal Duty
- Setscrew Ball Bearing
![ISO 7206 ADB angular contact ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11106-iso-7206-adb-angular-contact-ball-bearings.jpg)
- ISO 7206 ADB angular contact ball bearings
- Normal Duty
- Setscrew Ball Bearing
![300 mm x 420 mm x 72 mm ISO SL182960 cylindrical roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11274-300-mm-x-420-mm-x-72-mm-iso-sl182960-cylindrical-roller-bearings.jpg)
- 300 mm x 420 mm x 72 mm ISO SL182960 cylindrical roller bearings
- Medium Duty
- D-Lock Ball Bearing
![ISO 71930 CDT angular contact ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11107-iso-71930-cdt-angular-contact-ball-bearings.jpg)
- ISO 71930 CDT angular contact ball bearings
- Normal Duty
- Setscrew Ball Bearing