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.
![ISO BK3514 cylindrical roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11113-iso-bk3514-cylindrical-roller-bearings.jpg)
- ISO BK3514 cylindrical roller bearings
- Normal Duty
- Setscrew Ball Bearing
![68,262 mm x 110 mm x 21,996 mm ISO 399A/394A tapered roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11110-68-262-mm-x-110-mm-x-21-996-mm-iso-399a-394a-tapered-roller-bearings.jpg)
- 68,262 mm x 110 mm x 21,996 mm ISO 399A/394A tapered roller bearings
- 107 Series
- Expansion
![ISO 7017 ADB angular contact ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11108-iso-7017-adb-angular-contact-ball-bearings.jpg)
- ISO 7017 ADB angular contact ball bearings
- Normal Duty
- D-Lock Ball Bearing
![ISO 7307 BDB angular contact ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11111-iso-7307-bdb-angular-contact-ball-bearings.jpg)
- ISO 7307 BDB angular contact ball bearings
- Normal Duty
- Setscrew Ball Bearing
![150 mm x 270 mm x 73 mm ISO SL182230 cylindrical roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11106-150-mm-x-270-mm-x-73-mm-iso-sl182230-cylindrical-roller-bearings.jpg)
- 150 mm x 270 mm x 73 mm ISO SL182230 cylindrical roller bearings
- Intermediate Duty
- Setscrew Ball Bearing
![5 mm x 13 mm x 4 mm ISO FL619/5 ZZ deep groove ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11110-5-mm-x-13-mm-x-4-mm-iso-fl619-5-zz-deep-groove-ball-bearings.jpg)
- 5 mm x 13 mm x 4 mm ISO FL619/5 ZZ deep groove ball bearings
- Intermediate Duty
- Setscrew Ball Bearing
![300 mm x 460 mm x 95 mm ISO NUP2060 cylindrical roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11104-300-mm-x-460-mm-x-95-mm-iso-nup2060-cylindrical-roller-bearings.jpg)
- 300 mm x 460 mm x 95 mm ISO NUP2060 cylindrical roller bearings
- Normal Duty
- Setscrew Ball Bearing
![35 mm x 72 mm x 27 mm ISO NU3207 cylindrical roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11274-35-mm-x-72-mm-x-27-mm-iso-nu3207-cylindrical-roller-bearings.jpg)
- 35 mm x 72 mm x 27 mm ISO NU3207 cylindrical roller bearings
- Normal Duty
- Setscrew Ball Bearing
![ISO 52413 thrust ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11108-iso-52413-thrust-ball-bearings.jpg)
- ISO 52413 thrust ball bearings
- Normal Duty
- Setscrew Ball Bearing
![190 mm x 290 mm x 180 mm ISO NNU6038 V cylindrical roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11105-190-mm-x-290-mm-x-180-mm-iso-nnu6038-v-cylindrical-roller-bearings.jpg)
- 190 mm x 290 mm x 180 mm ISO NNU6038 V cylindrical roller bearings
- Intermediate Duty
- Setscrew Ball Bearing
![100 mm x 215 mm x 47 mm ISO 6320-2RS deep groove ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11112-100-mm-x-215-mm-x-47-mm-iso-6320-2rs-deep-groove-ball-bearings.jpg)
- 100 mm x 215 mm x 47 mm ISO 6320-2RS deep groove ball bearings
- Normal Duty
- Setscrew Ball Bearing
![ISO HK354524 cylindrical roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11113-iso-hk354524-cylindrical-roller-bearings.jpg)
- ISO HK354524 cylindrical roller bearings
- Intermediate Duty
- Setscrew Ball Bearing