Wholesale G5-G200 Precision 1/8″ (3.18mm) 304 Micro-Valve Balls
| Item No : | 3.18 mm / 0.125 inch Precision Steel Balls |
| Diameter : | 3.18 mm (1mm-101.6mm) |
| Material : | 304 Stainless Steel |
| Lead Time : | 3-5 days |
| Grade: | G5-200 |
| MOQ : | 5KGS |
| Service : | Support Sample Testing |
⚙️Product Description:
Designing micro-fluidic systems that demand absolute zero-leakage within microscopic spaces? The Precision 3.18mm (1/8″) 304 Stainless Steel Balls in G5-G200 grades represent the apex of miniature fluid control components. Far surpassing ordinary commercial beads, these micro-spheres undergo specialized ultra-lapping processes to achieve sub-micron sphericity and flawless surface finishes. Combined with the pristine corrosion resistance of unhardened AISI 304 stainless steel, they are engineered for critical micro-valves, laboratory diagnostics, and medical micro-dosing. As a premier B2B components trader, we supply hyper-consistent RMO brand precision micro-balls in volume, and leverage our global network to source OEM-specific laboratory grades for your most sensitive applications.
⚙️Product features:
- Micro-Precision Sphericity (G5-G200): Achieves extraordinary roundness tolerances (down to 0.13µm for G5) on a tiny 3.18mm footprint, ensuring immediate, airtight seating in micro-valves.
- Laboratory-Grade 304 Protection: Austenitic composition resists contamination and corrosion from biochemicals, saline solutions, and analytical reagents.
- Ultra-Lapped Surface Finish: The mirror-like surface drastically minimizes fluid friction and prevents the adhesion of biological or chemical micro-particles.
- Non-Shattering Unhardened Core: High core toughness ensures the micro-ball maintains its structural integrity under the high-frequency pulsations of micro-diaphragm pumps.
- Agile B2B Sourcing Network: Secure your high-tech supply chain with our rapid RMO wholesale distribution or certified global OEM micro-sphere sourcing.
⚙️Product Application:
Where extreme dimensional accuracy intersects with micro-miniaturization, these precision 1/8″ 304 balls are critical for:
- Laboratory micro-fluidic pumps and automated bio-diagnostic channels.
- Medical micro-dosing systems (e.g., insulin pump mechanisms and precision IV regulators).
- High-end aerospace micro-check valves and pneumatic micro-actuators.
- High-resolution industrial inkjet printer heads and optical fluid lenses.
- Global biomedical equipment manufacturers, micro-valve OEMs, and lab hardware distributors.
⚙️Precautions:
| 1. Keep clean | 2. Use with caution | 3. appropriate tool | 4. Hot-loading | 5. Be careful of rust |
| Dust will have a bad effect on the bearing, so keep the surrounding clean. | Strong impact during use can easily cause scratches and indentations. | Avoid replacing existing tools, and use appropriate tools. | Bearings are precision parts, so hot installation is recommended. | Sweat on your hands during operation will cause rust, so it is best to wear gloves. |
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⚙️Obtain Certificate:
About Rimao
Since its establishment in 2011, Rimao Bearing has combined international vision with local wisdom and injected innovative ideas into every bearing and pulley with its profound industry accumulation and unremitting pursuit of technology. We have not only passed CE and ROHS certification, but also set a new benchmark in the industry and led the development trend of the bearing industry.
We are not just a ball bearing and roller bearing importer and wholesaler. We provide real solutions to help you achieve the product and design goals set by your customers. With more than 20 years of production and sales experience, tens of thousands of models and specifications, we look forward to cooperating with you!
⚙️Technical Parameters:
| Model No. | |
| Diameter | |
| Material | |
| Precision Grades | |
| Sphericity Variation | |
| Hardness | |
| Magnetic Properties | |
| Surface Finish | Mirror-polished, Ultra-lapped |
| Weight per Piece | (Ultra-lightweight micro component) |
| Supply Capability | RMO Brand Bulk Wholesale & Global OEM Sourcing |
| Package | |
| Lead Time | |
| Shipping | |
| Payment | 100% TT, or 30% TT In Advance, 70% TT After Finished Production |
| Steel Ball Size & Weight Chart (Reference Only) | |||
| Diameter | kg/1000pcs | Pcs / kg | |
| inch | mm | ||
| 0.5 | 0.00051 | 1960780 | |
| 0.68 | 0.00128 | 781250 | |
| 0.8 | 0.00209 | 478470 | |
| 0.9 | 0.00298 | 335570 | |
| 1 | 0.00408 | 245100 | |
| 1.2 | 0.00705 | 141840 | |
| 1.3 | 0.00893 | 111980 | |
| 1.45 | 0.0124 | 80645 | |
| 1.5 | 0.01379 | 72493 | |
| 1/16 | 1.558 | 0.016 | 62350 |
| 1.75 | 0.0218 | 45871 | |
| 2 | 0.0326 | 30700 | |
| 3/32 | 2.3812 | 0.055 | 18182 |
| 2.5 | 0.0637 | 15698 | |
| 3 | 0.11 | 9091 | |
| 1/8 | 3.175 | 0.131 | 7634 |
| 3.5 | 0.175 | 5717 | |
| 9/64 | 3.5718 | 0.18628 | 5369 |
| 5/32 | 3.969 | 0.255 | 3922 |
| 4 | 0.261 | 3831 | |
| 4.5 | 0.372 | 2688 | |
| 3/16 | 4.7625 | 0.441 | 2268 |
| 5 | 0.51 | 1961 | |
| 13/64 | 5.1594 | 0.56 | 1786 |
| 7/32 | 5.5562 | 0.699 | 1431 |
| 15/64 | 5.9531 | 0.86 | 1163 |
| 6 | 0.881 | 1136 | |
| 1/4 | 6.35 | 1.04 | 962 |
| 6.5 | 1.119 | 894 | |
| 17/64 | 6.7469 | 1.25 | 800 |
| 7 | 1.4 | 714.3 | |
| 9/32 | 7.1438 | 1.49 | 671 |
| 7.5 | 1.722 | 580.7 | |
| 5/16 | 7.9375 | 2.04 | 490 |
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