ISO Bearings
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.
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.
![ISO Q319 angular contact ball bearings](https://m.ctrciec.cn/uploaded_images/d11843-iso-q319-angular-contact-ball-bearings.jpg)
- ISO Q319 angular contact ball bearings
- 6800ZZ
- 10x19x5
![ISO Q1024 angular contact ball bearings](https://m.ctrciec.cn/uploaded_images/d11839-iso-q1024-angular-contact-ball-bearings.jpg)
- ISO Q1024 angular contact ball bearings
- 46176/46368
- 44.45x93.662x31.75
![263,525 mm x 355,6 mm x 57,15 mm 263,525 mm x 355,6 mm x 57,15 mm ISO LM451345/10 tapered roller bearings](https://m.ctrciec.cn/uploaded_images/d11841-263-525-mm-x-355-6-mm-x-57-15-mm-263-525-mm-x-355-6-mm-x-57-15-mm-iso-lm451345-10-tapered-roller-bearings.jpg)
![150 mm x 210 mm x 36 mm 150 mm x 210 mm x 36 mm ISO SL182930 cylindrical roller bearings](https://m.ctrciec.cn/uploaded_images/d11840-150-mm-x-210-mm-x-36-mm-150-mm-x-210-mm-x-36-mm-iso-sl182930-cylindrical-roller-bearings.jpg)
![630 mm x 780 mm x 112 mm 630 mm x 780 mm x 112 mm ISO NP38/630 cylindrical roller bearings](https://m.ctrciec.cn/uploaded_images/d11840-630-mm-x-780-mm-x-112-mm-630-mm-x-780-mm-x-112-mm-iso-np38-630-cylindrical-roller-bearings.jpg)
![1,191 mm x 3,967 mm x 2,38 mm 1,191 mm x 3,967 mm x 2,38 mm ISO R0-2RS deep groove ball bearings](https://m.ctrciec.cn/uploaded_images/d11838-1-191-mm-x-3-967-mm-x-2-38-mm-1-191-mm-x-3-967-mm-x-2-38-mm-iso-r0-2rs-deep-groove-ball-bearings.jpg)
![79,974 mm x 146,975 mm x 40 mm 79,974 mm x 146,975 mm x 40 mm ISO HM218238/10 tapered roller bearings](https://m.ctrciec.cn/uploaded_images/d11836-79-974-mm-x-146-975-mm-x-40-mm-79-974-mm-x-146-975-mm-x-40-mm-iso-hm218238-10-tapered-roller-bearings.jpg)
![1 mm x 4 mm x 1,6 mm 1 mm x 4 mm x 1,6 mm ISO FL619/1 deep groove ball bearings](https://m.ctrciec.cn/uploaded_images/d11845-1-mm-x-4-mm-x-1-6-mm-1-mm-x-4-mm-x-1-6-mm-iso-fl619-1-deep-groove-ball-bearings.jpg)
- 1 mm x 4 mm x 1,6 mm 1 mm x 4 mm x 1,6 mm ISO FL619/1 deep groove ball bearings
- 280 mm
- Viton Single Lip
![1000 mm x 1320 mm x 438 mm 1000 mm x 1320 mm x 438 mm ISO GE1000DO plain bearings](https://m.ctrciec.cn/uploaded_images/d11837-1000-mm-x-1320-mm-x-438-mm-1000-mm-x-1320-mm-x-438-mm-iso-ge1000do-plain-bearings.jpg)
- 1000 mm x 1320 mm x 438 mm 1000 mm x 1320 mm x 438 mm ISO GE1000DO plain bearings
- 68/950/1200
- 950x1200x90