Linear Ball Bearing Design; Spring-Extend and Air-Extend The Linear Ball Bearing (LBB) series of dimensional gauging probes is engineered for highly precise and repeatable measurements in quality control and metrology applications. AC-operated Linear ball bearing assemblies Removable tungsten carbide contact tip for long-term reliability and interchangeability Double-shielded LVDT for greater protection from effects of magnetic materials Polyurethane-jacketed cable enhances flexibility and improves chemical resistance Standard Viton boot for greater resistance to chemicals and high temperatures Radial cable exit adaptor supplied