Hybrid Seal MR18338 Z RS Bicycle Hub & BB Bearing 18x33x8mm
| Item No : | MR18338 Z RS / 18338 Z/RS |
| Size (d*D*B) : | 18x33x8mm |
| Material : | Chrome Steel GCr15 |
| Lead Time : | 3-5 days |
| Weight : | 0.023KG |
| MOQ : | 100 pcs |
| Service : | Support Sample Testing |
⚙️Product Description:
The MR18338 Z RS (18x33x8mm) is a highly specialized bicycle bearing renowned for its ingenious “hybrid sealing” technology. By combining one rubber seal (RS) with one metal shield (Z), it offers mechanics the ultimate balance: the rubber side faces outward to combat harsh weather, while the metal side faces inward to drastically reduce internal rolling resistance. As a professional B2B bearing trader, we supply this friction-optimized component under our dependable RMO brand for bulk wholesale. Should your manufacturing process require other top-tier international brands, our extensive sourcing network can deliver exactly what you need.
⚙️Product Features:
- Hybrid Enclosure (Z RS): The outward-facing rubber contact seal (RS) repels water and trail dirt, while the inward-facing non-contact metal shield (Z) retains grease without adding drag.
- Friction Optimization: By eliminating the inner rubber lip friction found in standard 2RS bearings, this design significantly enhances free-spinning efficiency in hubs and bottom brackets.
- Precision Rotational Dynamics: Crafted with premium high-carbon chrome steel and ABEC-rated precision to support high-speed pedaling and heavy rider loads.
- Flexible B2B Sourcing: Maximize profitability with our heavily stocked RMO brand, or request custom procurement of other premium brands for your specific OEM requirements.
⚙️Product Application:
Thanks to its unique half-sealed/half-shielded profile, the MR18338 Z RS is primarily utilized in:
- Bicycle Front and Rear Hubs (where internal friction must be minimized).
- Specific lightweight Bottom Brackets (BB) requiring directional sealing.
- E-bike (Electric Bicycle) internal motor gearboxes and drivetrain components.
- Professional racing wheelset overhauls where every watt of energy savings matters.
⚙️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. | |
| Bearing Type | Thin-wall Deep Groove Ball Bearing |
| Dimensions | |
| Enclosure | Z RS (1 Side Rubber Seal, 1 Side Metal Shield) |
| Performance Edge | Low Drag & Directional Protection |
| Material | |
| Target Application | |
| Brand | RMO (Own Brand) / Neutral / OEM Custom / Other Global Brands |
| Package | |
| Lead Time | |
| Shipping | |
| Payment | 100% TT, or 30% TT In Advance, 70% TT After Finished Production |
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