The Difference of Seal Ring LS.RS.RS1.RZ in Bearing Suffix

The difference between RS and RZ:

RZ: The bearing side has a low friction seal lined with steel plate synthetic rubber (non-contact type); RS: The bearing side has a contact seal lined with synthetic rubber or polyurethane (contact type). The contact and non-contact means that the seal ring of the bearing contacts with the inner ring of the bearing.

RS type bearing seal ring is closely contacted with the inner ring of the bearing, which has better sealing effect. The structure is like oil seal. RS type bearing can save oil seal in mechanical structure. The sealing effect of imported RS series bearings is better.

RZ type bearing seal ring does not contact with the inner ring of the bearing, there are gaps, this structure only plays the role of dust prevention, and can not seal, the bearing is generally used in mechanical structure with oil packaging device.

RS has lower limit speed than RZ type non-contact and non-friction because of friction between seal ring and inner ring. RZ type can reach the limit speed of open bearing. At present, the RZ series is seldom produced, which is generally replaced by Z stamping pure metal dust cover.

What about LS?

LS: Contact seals of NBR or AU with or without unilateral steel skeleton. One side of the bearing has contact seals and the inner ring has no sealing grooves. The main difference between LS seal and other three seals lies in the groove of inner ring.

The difference between RS and RS1:

RS1: NBR contact seals with one-sided steel skeleton for bearings.

RS1 is mainly found in SKF products and some domestic brands. (The FAG product is RSR for seals.)

The difference between them lies in the difference of sealing rings. RS seals are single lip seals, while RS1 seals are double lip seals.

In addition, the material of bearing seal ring is mostly NBR, which has high strength, good elasticity, good wear resistance and black color. There are also some other materials, such as fluororubber, strong acid and alkali resistance, oil resistance, high temperature resistance of 250 degrees Celsius (120 degrees Nitrile Butadiene), the color is brown.