SKF stainless steel deep groove ball bearings are corrosion resistant when exposed to moisture and several other media. They are available capped (with seals or shields) or open.
SKF stainless steel deep groove ball bearings have a lower load carrying capacity than same-sized bearings made of high chromium steel.
SKF stainless steel capped bearings
The seals are fitted in a recess on the outer ring, and they make good, positive contact with the recess, without deforming the outer ring. The capping devices are available as:
- Shields: shields are identified by the designation suffixes Z or ZS (refer to SKF bearing designation). And they are primarily intended for applications where the inner ring rotates. Shields for SKF stainless steel deep groove ball bearings are made of stainless steel.
- Non-contact seals: Non-contact seals are identified by the designation suffix RZ. They provide better sealing effectiveness than shields, and can be operated at the same speeds as shields. Non-contact seals are made of sheet steel reinforced NBR.
- Contact seals: Contact seals are identified by the designation suffixes RS1, RS1/VP311 or RS
- RS1 seals are made of sheet steel reinforced NBR and seal against the inner ring shoulder or against a recess in the inner ring side face
- SKF stainless steel capped bearings with designation suffix VP311 are equipped with seals made of blue food-compatible NBR.
- RS2 seals are similar to RS1 seals, but are made of sheet steel reinforced FKM.
Greases for SKF stainless steel capped bearings
Bearings capped on both sides are lubricated for the life of the bearing and are virtually maintenance-free. They are filled with one of the following greases:
- Wide temperature range and low-noise grease LHT23 as standard
- GFJ food-grade grease, registered by NSF as category H1 (designation suffix VP311)
- Available on request: special non-toxic grease, registered by NSF as category H1 (designation suffix VT378)
Cages
Depending on their design, series and size, SKF stainless steel deep groove ball bearings are fitted with stainless steel cage, or polymer cage.