ICOS oil sealed bearing units
ICOS oil sealed bearing units are designed for applications where sealing requirements exceed the capabilities of bearings with contact seals. An ICOS unit consists of a 62 series deep groove ball bearing and one integral SKF WAVE seal (fig. 1). The SKF WAVE seal is a single lip, spring loaded radial shaft seal made of NBR. ICOS units need less axial space than an arrangement using a bearing and an external seal. They simplify mounting and avoid expensive machining of the shaft because the inner ring shoulder is the seal counterface.
The limiting speeds quoted in the product table are based on the permissible circumferential speed for the seal, which is 14 m/s.