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 234411 thrust ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11104-iso-234411-thrust-ball-bearings.jpg)
- ISO 234411 thrust ball bearings
- Medium Duty
- Setscrew Ball Bearing
![ISO 53309 thrust ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11108-iso-53309-thrust-ball-bearings.jpg)
- ISO 53309 thrust ball bearings
- Normal Duty
- Grip Tight Ball Bearing
![280 mm x 500 mm x 130 mm ISO 22256W33 spherical roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11113-280-mm-x-500-mm-x-130-mm-iso-22256w33-spherical-roller-bearings.jpg)
- 280 mm x 500 mm x 130 mm ISO 22256W33 spherical roller bearings
- Normal Duty
- Setscrew Ball Bearing
![ISO 52411 thrust ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11274-iso-52411-thrust-ball-bearings.jpg)
- ISO 52411 thrust ball bearings
- Normal Duty
- Setscrew Ball Bearing
![70 mm x 90 mm x 10 mm ISO 61814 ZZ deep groove ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11111-70-mm-x-90-mm-x-10-mm-iso-61814-zz-deep-groove-ball-bearings.jpg)
- 70 mm x 90 mm x 10 mm ISO 61814 ZZ deep groove ball bearings
- Normal Duty
- Setscrew Ball Bearing
![ISO KZK30X37X16 needle roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11105-iso-kzk30x37x16-needle-roller-bearings.jpg)
- ISO KZK30X37X16 needle roller bearings
- Intermediate Duty
- Eccentric Collar Ball Bearing
![ISO K14X20X17 needle roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11107-iso-k14x20x17-needle-roller-bearings.jpg)
- ISO K14X20X17 needle roller bearings
- Normal Duty
- Setscrew Ball Bearing
![1000 mm x 1220 mm x 128 mm ISO NF28/1000 cylindrical roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11106-1000-mm-x-1220-mm-x-128-mm-iso-nf28-1000-cylindrical-roller-bearings.jpg)
- 1000 mm x 1220 mm x 128 mm ISO NF28/1000 cylindrical roller bearings
- Normal Duty
- Grip Tight Ball Bearing
![85,725 mm x 142,138 mm x 42,862 mm ISO HM617049/10 tapered roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11110-85-725-mm-x-142-138-mm-x-42-862-mm-iso-hm617049-10-tapered-roller-bearings.jpg)
- 85,725 mm x 142,138 mm x 42,862 mm ISO HM617049/10 tapered roller bearings
- Intermediate Duty
- Setscrew Ball Bearing
![ISO 7217 ADB angular contact ball bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11105-iso-7217-adb-angular-contact-ball-bearings.jpg)
- ISO 7217 ADB angular contact ball bearings
- Normal Duty
- Setscrew Ball Bearing
![180 mm x 320 mm x 112 mm ISO NJ3236 cylindrical roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11112-180-mm-x-320-mm-x-112-mm-iso-nj3236-cylindrical-roller-bearings.jpg)
- 180 mm x 320 mm x 112 mm ISO NJ3236 cylindrical roller bearings
- Normal Duty
- D-Lock Ball Bearing
![44,45 mm x 95,25 mm x 28,575 mm ISO 33885/33822 tapered roller bearings](https://m.jiaji-kuaiyun.cn/uploaded_images/d11113-44-45-mm-x-95-25-mm-x-28-575-mm-iso-33885-33822-tapered-roller-bearings.jpg)
- 44,45 mm x 95,25 mm x 28,575 mm ISO 33885/33822 tapered roller bearings
- Normal Duty
- Setscrew Ball Bearing