What are CR seals?
Founded in 1878 as Chicago Rawhide, CR Seals has one of the longest histories in the seal industry. For the last 110+ years, CR Seals has been setting performance and service life standards for industrial and automotive shaft seals. CR Seals is represented as Power Transmission Seals in SKF.
What is a dual lip seal?
Double lip oil seals feature two lips for better fluid separation or contamination exclusion. Many oil seals are spring loaded to provide constant, a uniform load of the lip on the shaft for the life of the seal. The spring load also provides a constant load on both lips of the double lip seal.
Who owns national seals?
The Timken Company
National seals are distributed through The Timken Company and are stocked in their Crossville, Tennessee warehouse, as well as Bearing Service, Inc.
What is radial shaft sealing ring?
Sealing of Rotating Machine Elements Such as Shafts, Hubs and Axles. Radial shaft seals are used to seal rotating axles and shafts against media from inside or against contaminants from outside.
What is the difference between a single lip and double lip seal?
Oil Seal Single Lip vs Double Lip The single lip is vital to the function of the seal by containing the oil, grease or lubricant. The only difference between a single and double lip is the additional rubber lip on the top of the oil seal which helps prevent dust or dirt from coming close to the shaft.
Do you grease oil seals?
Both the shaft and the Oil Seal have to be lubricated with oil or grease in advance. This eases the assembly and ensures lubrication from the beginning. If Oil Seals with fixed dust lips are being used, the space be- tween the sealing lip and the dust lip may also be filled max. 40% with grease.
How do shaft seals work?
Shaft seals work like most other seals by compressing the surface, or in this case the shaft, on which they are installed. The shaft seal is placed around the rotating shaft, at which point it seals the oil- or lubricant-filled passage. Even if the oil or lubricant is pressurized, it shouldn’t leak.
What are axial shaft seals?
With the exception of axial clamp seals, axial shaft seals rotate with the shaft and act as flingers, tolerating small misalignments of the shaft and providing reliable sealing if the shaft is out of round or rotates eccentrically.