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Sapphire Products >> Jewel Bearings |
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| Jewel Bearings |
| HYT Sapphire Optics is a prominent manufacturer specializing in high-quality jewel bearings. These precision miniature components are primarily crafted from synthetic sapphire and ruby due to their exceptional hardness and capacity for achieving a superior polish. |
| Synthetic sapphire boasts outstanding properties including high hardness, robust strength, scratch resistance, corrosion resistance, and a minimal coefficient of friction. Jewel bearings made from sapphire are highly suitable for instruments, meters, control devices, and precision mechanisms where attributes like low friction, extended operational life, and precise dimensional accuracy are critical. Their ability to withstand high temperatures and their chemical durability make sapphire jewel bearings particularly advantageous in applications within the petrochemical, process control, and medical instrumentation sectors. |
| Sapphire jewel bearings offer consistent static friction and low kinetic friction, with sapphire-on-steel configurations exhibiting a static coefficient of friction typically ranging from 0.10 to 0.15. These bearings maintain smooth surfaces even after prolonged use, ensuring minimal variability in friction over extended periods. HYT Sapphire Optics provides a diverse range of high-precision jewel bearings tailored for industrial and military applications, including cup jewel bearings, vee jewels, and ring jewel bearings. |
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Types of Jewel Bearings |
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Ring jewel bearings - designed as journal or annular bearings, are typically employed with straight cylindrical shafts. These bearings feature a contoured hole shaped like an hourglass or an olive. The olive-shaped hole reduces contact area with pivots, resulting in lower friction levels. Additionally, it allows for assembly adjustments to compensate for any misalignment that may occur during operation. |
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Cup jewel bearings - are typically employed in vertical shaft applications, such as electronic meters, hot water meters, liquid measuring instruments, and the movement systems of single-phase and three-phase KWH meters. They come in various types, including spherical cup jewel bearings, conical cup jewel bearings, single cup jewel bearings, and double cup jewel bearings. These bearings are designed to provide stable and precise rotational movement in vertical shaft orientations, ensuring reliable performance in metering and measuring instruments. |
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Vee Jewel bearings - are ideal for use in highly sensitive instruments that require low torque bearings, especially where the moving element is lightweight. These bearings minimize friction when paired with conical pivots, typically requiring the pivot's contact area to be meticulously polished for optimal performance. They are designed to provide smooth and precise rotational movement, ensuring minimal energy loss and high accuracy in delicate instrument applications. |
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Jewel Bearings Assemblies |
Most jewel bearings are housed in assemblies or screws to facilitate their integration into instruments. These assemblies allow for precise alignment and reliability. Some assemblies include a spring for fine-tuning and shock absorption, enhancing bearing durability and stability in precision instruments. |
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