Non-contact seals series CF are specifically designed for spindle bearings and offer highest efficiency with absolutely leak tightness within a minimized space of 6 mm width only.
The labyrinth design is a combination of gaps in axial and radial direction in five steps. The axial gaps are shielding while the radial gaps are providing back transport. A catching groove improves the seal efficiency – even without any shaft rotation.
The option of saving sealing air and increased maintenance intervals are offering a considerable commercial progress and advantage.
GMN non-contact seals Type CF 60 and CF 619 are produced according to the dimensions of ball bearing rows 60 and 619. They are made of steel, hardened and face-ground. The spindle bearing is pre-loaded directly through the CF seal’s inner ring
No adaptation of the connecting parts (other diameters or tolerances, hardnesses, shaft collar, etc.) required; can be installed directly next to the spindle bearing “sandwiched” between bearing and shaft nut
For operating temperatures up to 170 °C
The hardened material is extremely resistant to abrasive particles and chips
Non-contact design of the inner and outer ring
Unlimited service life
Fulfills the highest cleanliness requirements
No axial movement between the spindle bearing and shaft nut
No thermal stress for the seal and adjacent components
Smooth operation with no performance losses fulfills the highest ecological and economical requirements
Narrow structural width of 6 mm for all shaft diameters enables space-saving solutions
High sealing effect against heavy spray loads over a large speed range – including when the shaft is at a standstill
For effective sealing of standard deep groove ball bearings, GMN labyrinth seals in the design CF … A0 are produced from aluminum with unground flat surfaces in the dimensions of bearing series 62.
For operating temperatures up to 200 °C
Low mass of the inner ring with rotating shaft
Non-contact design of the inner and outer ring
Unlimited service life
Fulfills the highest cleanliness requirements
No thermal stress for the seal and adjacent components
Smooth operation with no performance losses fulfills the highest ecological and economical requirements
Narrow structural width of 6 mm for all shaft diameters enables space-saving solutions
High sealing effect against heavy spray loads over a large speed range – including when the shaft is at a standstill
No adaptation of the connecting parts (other diameters or tolerances, hardnesses, shaft collar, etc.) required
The larger sealing gap diameter (e2) faces the impact side.
The CF seal is hardened and ground plane parallel in the CF … S10 design. The seal is installed in direct contact with the spindle bearing. The bearing preload can be transferred directly onto the bearing via the seal.
The inner and outer ring are pressed in together with an installation aid. This means that both rings are positioned centrally to each other and are not touching or in contact. The CF seal is positioned free-standing next to the bearing. No axial fixing is required (press fit). For higher speed requirements, the press fit to the shaft can be increased where necessary.
