A shaft sleeve is made of ceramics and provided in confrontation with a stationary sliding member in a sliding bearing or plain bearing. The shaft sleeve made of ceramics comprises a cylindrical body made of ceramics and having a circular outer surface and a circular inner surface, and an elastic member molded on the inner surface of the cylindrical body and being formed with an inner opening having a shape corresponding to the cross section of a shaft. The Shaft screws is usable under high temperature conditions and with liquids containing much slurry such as, for example, as a shaft sleeve of a pump.
What, exactly, is a repair sleeve? A Nonstandard parts is drawn from a specialized stainless steel alloy. The outer diameter of the sleeve is then finished to provide a high-quality sealing surface. The resulting sleeve finish, texture, and roughness are optimized for use with elastomeric radial lip shaft seals. In many cases, the repair sleeve actually creates a seal running surface that is often superior to that of the original shaft (Fig. 1). A typical thin-walled repair sleeve adds 0.022 in. to the nominal shaft diameter, which means the original shaft seal size can still be used. This sleeve eliminates the extra inventory and possible problems that could arise if a larger ID seal was required.
In applications subjected to large amounts of abrasive particles, a recently developed plated sleeve offers improved seal life and performance. A 0.00012-in. thick metallic layer is added over the base sleeve. This sleeve increases the surface hardness to approximately 80 HRc and resistance to abrasive grooving. Unlike hard chrome, the bonded coating does not fracture during installation, is thermally and chemically stable, and resists most acids and alkalis.
