Stainless Steel Ball Bearing

Stainless steel ball bearing can resist corrosion caused by moisture and other media. Provide closed (with seal or dust cover) or open design. Open bearings can also be installed with seals or dust covers, and there are generally grooves on the side of the inner ring.

The bearing capacity of these bearings is lower than that of high chromium steel bearings of the same size.

Closed bearing

Different sealing devices are selected according to different operating conditions. However, these guidelines are not a substitute for practical application testing of dust covers or seals.

The seal is installed in the groove of the outer ring, in good contact with the groove, and will not cause deformation of the outer ring. Sealing devices include:

Stainless Steel Ball Bearing Dust cover

Represented by model suffix Z or ZS.
It is mainly used in the working condition of inner ring rotation
It is installed in the outer ring and forms a narrow gap with the inner ring
Made of stainless steel
There are three different designs:

With model suffix Z: with or without the extension in the inner hole of the dust cover or the inner hole of the dust cover can extend into the groove in the inner ring
It is fixed in the outer ring by a snap ring and can extend into the groove (model suffix ZS,)
Dust covers made of PTFE are available on request

Non contact seal

Denoted by the model suffix RZ.
Provide better sealing effect than dust cover
It can reach the same running speed as the dust cover
Form a very narrow gap with the shoulder of the inner ring
It is made of NBR (oil resistance and wear resistance) reinforced by steel skeleton

Contact seal

It is indicated by the model suffix RS1, RS1 / vp311 or RS2
The RS1 seal is made of NBR reinforced by steel plate, and the sealing lip rests against the shoulder of the inner ring or the groove on the side of the inner ring (Fig. 6).
Bearings with suffix vp311 are equipped with seals made of food compatible blue NBR.
The material has been approved by FDA and EC. FDA approval is based on 21 CFR 177.2600: “reusable rubber products” for contact with aqueous and oily foods. EC compliance is based on the general migration requirements for food contact materials in the German BFR recommendation and the XXI recommendation for class 3 materials.
The RS2 seal is similar to the RS1 seal, but is made of FKM reinforced by steel plate skeleton.

Closed bearing lubricating oil

The bearings sealed on both sides are designed for lifetime lubrication and almost maintenance free. They are filled with one of the following greases:

Wide temperature and low noise grease lht23
GFJ food grade grease, registered as H1 by NSF (model suffix: vp311)
NSF registration confirms that the grease meets the requirements of 21 CFR 178.3570 of the U.S. Food and Drug Administration (accidental food contact of grease is acceptable for use in and around food processing areas).
Special non-toxic grease can be provided on request, which is registered as H1 by NSF (model suffix is vt378)