ENGINEERING Bearing Types Mounting, Fitting, and setting cages and installation
Cylindrical Roller Bearing mounting, fitting, setting and installation Mounting
Fitting Practice
Cylindrical roller bearings can be mounted individually, but most often are mounted in combination with another cylindrical roller, a spherical roller or a tapered roller bearing.
Tables 6-18 on pages 22-39 list the recommended fitting practice for cylindrical roller bearings. The tables assume:
Fig. 8 shows a pulverizer wheel assembly where a two-row spherical roller bearing is mounted in combination with a cylindrical roller bearing. In this application, the cylindrical roller bearing allows the shaft to float relative to the housing. Fig. 9 shows a single-reduction gear reducer with herringbone gears. A tapered roller bearing is mounted in combination with a cylindrical roller bearing on the upper shaft, and two cylindrical bearings are mounted on the lower shaft.
•• The bearing is of normal precision. •• The housing is thick and made from steel or cast iron. •• The shaft is solid and made from steel. •• The bearing seats are ground or accurately turned to less than approximately 1.6 µm Ra finish.
The suggested fit symbols are in accordance with ISO 286. For help with recommended fitting practices, contact your Timken representative.
Fig. 9. Single-reduction gear reducer.
Fig. 8. Pulverizer wheel assembly.
Warning
Failure to observe the following warnings could create a risk of death or serious injury. Proper maintenance and handling practices are critical. Always follow installation instructions and maintain proper lubrication. Never spin a bearing with compressed air. The rollers may be forcefully expelled.
16
TIMKEN CYLINDRICAL ROLLER BEARING CATALOG