Wholesale 1/4 Inch Bore SFRW188ZZ Extended Inner Ring Flanged Bearings
| Item No : | |
| Size (d*D*B) : | 6.35×12.7×4.76×5.558×13.89 mm |
| Material : | |
| Lead Time : | 3-5 days |
| Weight : | 0.0017KG |
| MOQ : | 100 pcs |
| Service : | Support Sample Testing |
⚙️Product Description:
Mounting 1/4-inch shafts in corrosive environments and looking to eliminate extra alignment spacers? The SFRW188ZZ Stainless Steel Flanged Ball Bearing (6.35×12.7×4.76/5.558mm, 13.89mm Flange) features an extended 5.558mm inner ring alongside premium AISI 440C stainless steel construction. The extended inner ring creates automatic axial clearance, preventing adjacent components from rubbing against the outer ring or bearing shields. Combined with its 13.89mm positioning flange, this miniature bearing accelerates assembly in marine electronics, peristaltic pumps, and RC mechanisms. As an agile B2B bearing trader, we supply our factory-tested RMO brand in bulk or source certified international OEM equivalents for your high-precision production lines.
⚙️Product Features:
- Extended Inner Ring (5.558mm vs 4.76mm Outer Width): Built-in inner ring extension provides natural side spacing, eliminating the need for extra washers, shims, or spacers.
- AISI 440C Stainless Steel (SUS440C): Offers exceptional resistance to rust, saltwater spray, high humidity, and mild industrial chemicals.
- 1/4 Inch (6.35mm) Imperial Bore: Specifically dimensioned for standard 1/4″ stainless steel drive axles and micro-stepper output shafts.
- 13.89mm Positioning Flange: Integrated outer flange delivers positive axial stopping against thin wall panels without internal housing shoulders.
- ZZ Stainless Metal Shields: Dual stainless steel shields lock in factory lubricant while defending the ball raceway against airborne dust and spray.
- Agile B2B Sourcing: Stock our cost-effective RMO brand to boost distribution profits, or leverage our global network for OEM-specified import brands.
⚙️Product Application:
Precision-engineered for 1/4″ shafting in corrosive micro-assemblies requiring spacer-free mounting, the SFRW188ZZ is essential for:
- Marine telemetry equipment, underwater drone actuators, and saltwater RC speedboats.
- Medical diagnostic instruments, laboratory peristaltic pumps, and chemical dosing systems.
- Precision micro-stepper motors and encoder linkages with 1/4″ D-shafts.
- Robotic joint pivots and aerospace micro-control actuators.
- Global hardware importers, medical equipment OEMs, and B2B stainless component 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. |
 |  |  |  |  |
⚙️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. | |
| Bearing Type | |
| Size | 6.35×12.7×4.76×5.558×13.89 mm (0.25×0.5×0.1875×0.2188×0.547 inch) |
| Flange Width | ~ 1.14 mm / 0.045 in |
| Material | |
| Shielding Type | Dual Stainless Steel Shields ZZ |
| Dynamic Load (Cr) | |
| Static Load (Cor) | |
| Max RPM | ~ 40,000 RPM (Grease) |
| Package | |
| Lead Time | |
| Shipping | |
| Payment | 100% TT, or 30% TT In Advance, 70% TT After Finished Production |
| Model No. | d | D | H | m |
| FRW0 | 1.19 mm | 3.97 mm | 3.18 mm | 0.13g |
| FRW1 | 1.4 mm | 4.76 mm | 3.57 mm | 0.21g |
| FRW1-4 | 1.98 mm | 6.35 mm | 4.34 mm | 0.46g |
| FRW1-5 | 2.38 mm | 7.94 mm | 4.37 mm | 0.74 g |
| FRW144 | 3.18 mm | 6.35 mm | 3.57 mm | 0.34g |
| FRW2-5 | 3.18 mm | 7.94 mm | 4.37 mm | 0.64 g |
| FRW2-6 | 3.18 mm | 9.53 mm | 4.37 mm | 1.07 g |
| FRW2 | 3.18 mm | 9.53 mm | 4.76 mm | 1.55 g |
| FRW155 | 4 mm | 7.94 mm | 3.97 mm | 0.59 g |
| FRW156 | 4.76 mm | 7.94 mm | 3.97 mm | 0.48 g |
| FRW166 | 4.76 mm | 9.53 mm | 3.97 mm | 0.92g |
| FRW3 | 5 mm | 12.7 mm | 5.77 mm | 3.21g |
| FRW168 | 6.35 mm | 9.53 mm | 3.97 mm | 0.69 g |
| FRW188 | 6.35 mm | 12.7 mm | 5.56 mm | 1.7 g |
| FRW4 | 6.35 mm | 15.88 mm | 5.77 mm | 4.4g |
| FRW1810 | 7.94 mm | 12.7 mm | 4.76 mm | 1.64 g |
leave a message
If you are interested in our products and want to know more details, please leave a message here, we will reply you as soon as we can.
You may also like
