Low-Friction MR1319-2RS Sealed Miniature Bearings for Bicycle Bicycle Hub Axles
| Item No : | MR1319-2RS / MR1319 2RS |
| Size (d*D*B) : | 13x19x4mm |
| Material : | Chrome Steel GCr15 / 52100 |
| Lead Time : | 3-5 days |
| Weight : | 0.0029KG |
| MOQ : | 100 pcs |
| Service : | Support Sample Testing |
⚙️Product Description:
The MR1319-2RS (13x19x4mm) is an ultra-thin section miniature deep groove ball bearing specifically designed for high-end bicycle components, precision hubs, and lightweight sports gear. Featuring a 13mm inner bore, 19mm outer diameter, and a narrow 4mm width, it minimizes weight and rotational friction without sacrificing structural alignment. Built with high-purity GCr15 chrome steel raceways, high-grade steel balls, and dual-contact blue or black rubber seals (2RS), it provides effective protection against mud, water spray, and trail dust. We supply these smooth-rolling bicycle bearings under our proprietary RMO brand while offering flexible global OEM sourcing for bicycle brand manufacturers, hub builders, and aftermarket repair distributors.
⚙️Product Features:
- Ultra-Thin Section Architecture: Minimal 3mm radial wall thickness maximizes hub shaft clearance while keeping overall rotational mass exceptionally low.
- Dual Contact Rubber Seals (2RS): Specially engineered rubber lip seals keep out mud, grime, and pressure washing spray while retaining synthetic waterproof grease.
- High Precision & Low Rolling Resistance: Micro-ground raceways polished to high precision ensure minimal rotational drag for fast, smooth wheel acceleration.
- Durable Chrome Steel Construction: High-carbon GCr15/52100 chrome steel offers long fatigue life and high resistance to repeated road shock loads.
⚙️Product Application:
Engineered for lightweight integration, mud protection, and low friction drag, the MR1319-2RS bearing is widely specified in:
- Bicycle components & wheelsets: road/MTB bicycle hubs, rear derailleur jockey wheels, suspension linkage pivots, and pedal spindles.
- Lightweight sports gear: high-end inline skates, lightweight scooter wheels, and RC model vehicle drivetrains.
- Precision micro-machinery: small brushless motors, optical encoders, and handheld power tools.
- Automation & robotics: miniature robot joint actuators, gimbal camera stabilization mounts, and conveyor rollers.
⚙️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 / Industry No. | MR1319-2RS / MR1319 2RS |
| Metric Dimensions | 13x19x4mm (Inner d x Outer D x Total Width/Height H) |
| Bearing Type | Ultra-Thin Section Deep Groove Ball Bearing |
| Seal Type | Dual Contact Rubber Seals 2RS |
| Material | GCr15 / 52100 Chrome Bearing Steel |
| Precision Rating | P0 / P6 (ABEC-1 / ABEC-3) |
| Lubrication | Factory Pre-filled Waterproof Synthetic Grease |
| Target Machinery | Bicycle Hubs, Suspension Pivots, Pedals, RC Models |
| Brand | RMO (Own Brand) / Neutral / OEM Custom / Other Global Brands |
| Package | Individual plastic bag, plastic tube or original RMO brand box |
| Lead Time | 3-5 days for stock; 7-15 days for bulk orders |
| Shipping | Express (DHL/FedEx/UPS), Air Freight, Sea Freight |
| Payment | 100% TT, or 30% TT In Advance, 70% TT After Finished Production |
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