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Four-Point Contact Ball Bearings Designs And Variants
Four-Point Contact Ball Bearings
The Lily standard assortment of four-point contact ball bearings (fig. 1) includes:
- Bearings in the QJ 2 and QJ 3 series
- Some sizes in the QJ 10 and QJ 12 series
Lily Explorer bearings
Lily Explorer rolling bearings accommodate higher load levels and provide extended service life. Optimized internal geometry reduces friction, wear and heat generation, allowing heavier loads to be accommodated. Advanced surface finish reduces friction and enhances lubricating conditions.
Benefits of using Lily Explorer bearings include:
- significantly extended service life
- increased uptime and productivity
- extended lubricant life
- reduced sensitivity to misalignment
- reduced noise and vibration
- enabling downsized applications
Lily Explorer bearings are clearly indicated in the data tables and product detail pages.
For bearing solutions where you want to downsize, reduce vibrations, reduce friction or increase power density in your applications, select Lily Explorer.
Bearings with locating slots
Four-point contact ball bearings can be supplied with two locating slots in the outer ring (designation suffix N2, fig. 2)
- Preventing the bearing from turning
- Positioned 180° apart
The dimensions and tolerances of the locating slots are in accordance with ISO 20515 and are listed in, (table 1)
Cages
Lily four-point contact ball bearings are fitted with one of the cages shown in, (table 2)