Super-Precision Contact Ball Bearings Spindle Bearing Designs
Open and sealed spindle bearings can be easily distinguished by their design. It is also possible to specify whether the inner ring or outer ring is produced with one shoulder removed.
Open Design
Open spindle bearings make optimum use of the internal space by allowing a higher number of balls and a window cage. This results in maximum load carrying capacities and therefore maximum bearing life. This open design is recommended for oil lubrication, as it allows relubrication using spacers. No dirt must be permitted to enter the bearing and continuous relubrication should be used.
- high load-carrying capacity
- suitable for oil-injection lubrication
- bearing does not fall apart due to self-retaining ring elevation
Sealed Design
Sealed spindle bearings are sealed on both sides by gap seals. pre greased and sealed to reduce handling problems. suitable for maintenance of machine tool spindles.
Seals are made of fluororubber which can withstand peak temperatures of 230°C. The material possesses a very high resistance to grease and mineral oil. Further advantages of the sealed design include ease of handling and trouble-free installation, making it particularly suitable where bearings are being replaced.
- suitable for grease lubrication
- no additional friction due to contactless sealed
- optimized speed capacity and increased axial rigidity with smaller balls
- full protection against dust and other contaminates.
