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.
![180 mm x 280 mm x 74 mm ISO 23036 KW33 spherical roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11112-180-mm-x-280-mm-x-74-mm-iso-23036-kw33-spherical-roller-bearings.jpg)
- 180 mm x 280 mm x 74 mm ISO 23036 KW33 spherical roller bearings
- Intermediate Duty
- Setscrew Ball Bearing
![ISO 234436 thrust ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11110-iso-234436-thrust-ball-bearings.jpg)
- ISO 234436 thrust ball bearings
- Normal Duty
- Grip Tight Ball Bearing
![45 mm x 120 mm x 29 mm ISO NUP409 cylindrical roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11108-45-mm-x-120-mm-x-29-mm-iso-nup409-cylindrical-roller-bearings.jpg)
- 45 mm x 120 mm x 29 mm ISO NUP409 cylindrical roller bearings
- Normal Duty
- Setscrew Ball Bearing
![ISO K40x45x13 needle roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11107-iso-k40x45x13-needle-roller-bearings.jpg)
- ISO K40x45x13 needle roller bearings
- Normal Duty
- D-Lock Ball Bearing
![70 mm x 125 mm x 39,7 mm ISO NJ3214 cylindrical roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11113-70-mm-x-125-mm-x-39-7-mm-iso-nj3214-cylindrical-roller-bearings.jpg)
- 70 mm x 125 mm x 39,7 mm ISO NJ3214 cylindrical roller bearings
- Normal Duty
- Setscrew Ball Bearing
![ISO K09x12x10 needle roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11274-iso-k09x12x10-needle-roller-bearings.jpg)
- ISO K09x12x10 needle roller bearings
- Intermediate Duty
- Setscrew Ball Bearing
![1,2 mm x 4 mm x 1,8 mm ISO MF41X deep groove ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11104-1-2-mm-x-4-mm-x-1-8-mm-iso-mf41x-deep-groove-ball-bearings.jpg)
- 1,2 mm x 4 mm x 1,8 mm ISO MF41X deep groove ball bearings
- Normal Duty
- Setscrew Ball Bearing
![33,338 mm x 72 mm x 18,923 mm ISO 26131/26283 tapered roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11106-33-338-mm-x-72-mm-x-18-923-mm-iso-26131-26283-tapered-roller-bearings.jpg)
- 33,338 mm x 72 mm x 18,923 mm ISO 26131/26283 tapered roller bearings
- Intermediate Duty
- Setscrew Ball Bearing
![800 mm x 1060 mm x 115 mm ISO 619/800 deep groove ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11105-800-mm-x-1060-mm-x-115-mm-iso-619-800-deep-groove-ball-bearings.jpg)
- 800 mm x 1060 mm x 115 mm ISO 619/800 deep groove ball bearings
- Normal Duty
- Setscrew Ball Bearing
![110 mm x 180 mm x 56 mm ISO NN3122 K cylindrical roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11112-110-mm-x-180-mm-x-56-mm-iso-nn3122-k-cylindrical-roller-bearings.jpg)
- 110 mm x 180 mm x 56 mm ISO NN3122 K cylindrical roller bearings
- Normal Duty
- Eccentric Collar Ball Bearing
![57,15 mm x 107,95 mm x 29,317 mm ISO 469/453A tapered roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11111-57-15-mm-x-107-95-mm-x-29-317-mm-iso-469-453a-tapered-roller-bearings.jpg)
- 57,15 mm x 107,95 mm x 29,317 mm ISO 469/453A tapered roller bearings
- Normal Duty
- Grip Tight Ball Bearing
![ISO UCF212 bearing units](https://m.jiaji-kuaiyun.cn/uploaded_images/d11106-iso-ucf212-bearing-units.jpg)
- ISO UCF212 bearing units
- Intermediate Duty
- Setscrew Ball Bearing