R188 Chrome Steel Bearing for Long Spin Time Fidget Spinners
| Item No : | R188 (Inch Series) |
| Size (d*D*B) : | 1/4 inch (6.35 mm) x 1/2 inch (12.7 mm) x 3/16 inch (4.762 mm) |
| Material : | Chrome steel Gcr15 or Stainless steel etc. |
| Lead Time : | 3-5 days |
| Weight : | 0.002KG |
| MOQ : | 100 pcs |
⚙️Bearing Description:
High-Performance R188 Miniature Ball Bearing
The R188 bearing is a specialized miniature deep groove ball bearing, widely recognized as the industry standard for high-end fidget spinners and precision micro-motors. Measuring 1/4″ x 1/2″ x 3/16″, this bearing is engineered for exceptionally low friction and high rotational speeds. Therefore, it is the perfect choice for enthusiasts and engineers who demand smoothness and durability.
⚙️Bearing Features:
Why Choose Our R188 Bearing?
• Ultra-Long Spin Time: Furthermore, our R188 bearings are optimized for reduced rolling resistance, significantly extending the spin time for fidget spinners compared to standard 608 bearings.
• High-Precision GCr15 Steel: Manufactured from premium chrome steel, these bearings offer high hardness and wear resistance. Consequently, they maintain peak performance even after millions of rotations.
• Shielded or Open Design: Depending on your needs, we provide R188-ZZ (shielded) for dust protection or Open R188 for easy cleaning and re-lubrication.
⚙️Bearing Applications:
R188 bearing mainly used for Spinners, Micro Motors, Precision Instrument. etc.
⚙️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:
| Item No. | R188 (Inch Series) |
| Branding | Famous brand/RMO/Neutral/OEM |
| Sealing | OPEN, ZZ (Metal Shield), 2RS (Rubber Seal) |
| Material | Stainless steel (420 440C 304 316) or chrome steel Gcr15, etc. |
| Lead Time | 3-5 days |
| Precision | p0 p6 p5 p4 |
| Clearance | C2 C0 C3 C4 |
| Ball Grade | G5 / G10 High Precision |
| Max Speed | 45,000+ RPM |
| Shipping Port | Guangzhou, Ningbo, Shanghai |
| Payment | 100% T/T, or 30% T/T In Advance ,70% T/T After Finished Production |
| Model No. | d | D | H | m |
| R155 | 3.97 mm | 7.94 mm | 2.78 mm | 0.55 g |
| R155ZZ | 3.97 mm | 7.94 mm | 3.18 mm | 0.55 g |
| R156 | 4.76 mm | 7.94 mm | 2.78 mm | 0.45 g |
| R156ZZ | 4.76 mm | 7.94 mm | 3.18 mm | 0.45 g |
| R166 | 4.76 mm | 9.52 mm | 3.18 mm | 0.8 g |
| R3ZZ | 4.76 mm | 12.7 mm | 4.98 mm | 2.27 g |
| R3 | 4.76 mm | 12.7 mm | 3.97 mm | 2.27 g |
| R186 | 4.76 mm | 12.7 mm | 2.78 mm | 2 g |
| R186ZZ | 4.76 mm | 12.7 mm | 3.97 mm | 2 g |
| R3A | 4.76 mm | 15.88 mm | 4.98 mm | 4.75 g |
| R3AZZ | 4.76 mm | 15.88 mm | 4.98 mm | 5.08 g |
| R168 | 6.35 mm | 9.52 mm | 3.18 mm | 0.6 g |
| R188 | 6.35 mm | 12.7 mm | 4.76 mm | 2 g |
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