sapphire cup jewels

Cup jewels are chiefly applied to electronic meter, hot water meter, liquid measuring instrument and movement system of single-phase and three-phase KHW meter. These cup jewels contain four types: spherical bearing, conical bearings, double cups on one face bearing, and single cup on double surfaces bearing. Specification: 1. Outside Diameter: Φ0.80 Φ25 ,h7 h9 2. Height: 0.30 25, Tolerance: 0.01 0.10 3. Curvature radius: 0.10 150, Tolerance: +/-0.01 +/-2.00 4. Cup depth: 0.05 12, Tolerance: +/-0.01 +/-0.10 5. Taper: 40° 160°, +/-5° Surface roughness: Rz0.05 Rz0.8 Material Synthetic sapphire/ruby single crystal α-Al2O3, natural agate, crystallite glass and ceramic, etc. There parts are manufactured according to customer’s design and specifications.