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German635 2RS bearing
Double rubber sealed deep groove ball bearing for wet and dusty environments. 5mm bore, 19mm OD, 6mm width. ABEC-3 precision, 32,000 RPM max with 2RS seals, 2.34kN dynamic load capacity.
635 2RS Deep Groove Ball Bearing 5x19x6mm
When a 5mm shaft bearing must survive washdown spray, outdoor humidity, or fine abrasive dust, the 635 2RS bearing replaces metal shields with contact rubber seals. The 2RS suffix means nitrile rubber (NBR) seals on both sides, factory-filled with grease and protected against moisture and particle ingress. At 5x19x6mm with a 2.34kN dynamic load rating, the 635 2RS bearing is the sealed workhorse of the 5mm-bore deep groove ball bearing series.
Key Specifications
- Sealing: 2RS double rubber seal (NBR + SPCC core), contact-type, factory grease-filled for life
- Load and Speed: 2.34kN dynamic, 0.885kN static, 32,000 RPM max (2RS) / 50,000 RPM (open reference)
- Direction: Radial loads; moderate axial capacity at approximately 25% of radial rating
- Temperature: -40 to 120 degrees C continuous operating range, lithium-base grease fill
- Material: GCr15 chrome steel rings and balls (AISI 52100 equivalent), NBR contact seals, stamped steel cage, ABEC-3 tolerance
For any inquiries, please contact with our Supporting Team at sales@yuanhecd.com.
| Model | 635 2RS |
| Type | Sealed |
| Bore Dia (d) | 5 mm |
| Outside Dia (D) | 19 mm |
| Width (B) | 6 mm |
| ABEC Tolerance | ABEC-3 |
| Dynamic Load Capacity (kN) | 2.34kN |
| Static Load Capacity (kN) | 0.885kN |
| Max. RPM | 32,000RPM (2RS) / 50,000RPM (open) |
| Temp. Range (℃) | -40~120℃ |
| Material | GCr15 (AISI 52100) |
| Seal Material | NBR + SPCC (Nitrile Rubber with Steel Core) |
| Lubrication | Grease |
Bore (d)
5 mm
OD (D)
19 mm
Width (B)
6 mm
Dyn. Load
2.34 kN
Max RPM
32,000
Precision
ABEC-3
Sealing and Lubrication
The 635 2RS bearing uses nitrile rubber (NBR) contact seals bonded to an SPCC steel core. Unlike the non-contact metal shields on the 635 ZZ bearing, the 2RS seal lips press against the inner ring to create a positive barrier. This contact design blocks moisture spray, fine dust, and metal particles that pass through a shield gap. The tradeoff is speed: seal friction limits the 635 2RS bearing to 32,000 RPM, roughly 8,000 RPM lower than the ZZ variant. The NBR compound resists swelling in water-glycol mixtures and light oils, making it suitable for pump and gearbox environments. Factory-filled with lithium-base grease and lubricated for life within the -40 to 120 degrees C service range. For clean, dry, high-speed applications where contamination risk is low, the 635 ZZ bearing offers 40,000 RPM with non-contact shields.
Performance
Within the 5mm-bore deep groove ball bearing series, the 635 bearing is the largest-OD option at 19mm and the highest load-capacity choice at 2.34kN dynamic. The 625 bearing (5x16x5mm) drops to 1.74kN, the 605 bearing (5x14x5mm) falls further. The 19mm OD and 6mm width provide a thicker ring cross-section, directly improving load distribution and shock resistance. Chrome steel (GCr15) rings and balls with a stamped steel cage. Manufactured to precision bearing standards with ABEC-3 tolerance. The 2RS seals do not affect load ratings since the seal lips contact the inner ring radially, not the rolling elements.
OEM and Customization
Custom clearance (C2, CN, C3) is available. C3 clearance is common for pump and motor applications where press-fit mounting reduces internal clearance. Alternate seal materials: Viton (FKM) for temperatures to 200 degrees C and chemical resistance, silicone for low-temperature flexibility. For food-processing, H1 registered grease and 440C stainless steel rings and balls provide washdown compatibility. Water-resistant calcium sulfonate grease is available for high-moisture environments. Submit your sealed bearing specification for a quote with batch inspection reports.
Applications
●Water and circulation pump shafts
●Garden machinery and outdoor power equipment
●Small gearbox shafts with oil mist exposure
●Conveyor rollers in washdown lines
●Fractional-horsepower drip-proof motors
●Agricultural equipment hubs
FAQ
How does 2RS sealing compare to ZZ shielding on a 635 bearing? +
The 635 2RS bearing uses NBR rubber seals that press against the inner ring, creating a positive contact barrier against moisture and fine particles. The 635 ZZ bearing uses non-contact metal shields with a small gap that allows higher speeds (40,000 vs 32,000 RPM) but cannot block liquid spray or fine dust. Choose 2RS for wet, dusty, or outdoor environments. Choose ZZ for clean, dry, high-speed applications where contamination risk is low.
What is the maximum RPM of a 635 2RS bearing? +
The 635 2RS bearing reaches 32,000 RPM with standard grease lubrication. The contact seals create friction that accounts for the 8,000 RPM difference versus the 635 ZZ bearing at 40,000 RPM. For most pump, motor, and gearbox applications operating below 15,000 RPM, the 2RS speed ceiling is well above the design requirement and the sealing benefit is the primary selection factor.
Can the 635 2RS bearing run in washdown or submerged conditions? +
The 635 2RS bearing resists water spray and splash but is not rated for continuous submersion. The NBR seal lips create a labyrinth-style barrier that blocks sprayed water and humidity. For intermittent washdown at low pressure, the standard 2RS configuration holds up with proper housing design. For submerged or high-pressure washdown, contact Yuanhe about Viton seals with water-resistant calcium sulfonate grease and consider adding an external lip seal to the housing.
Can I get the 635 2RS bearing with stainless steel for corrosion resistance? +
Yes. 440C martensitic stainless steel rings and balls are available on custom order for marine, food-processing, and chemical environments. Pair 440C with Viton seals for maximum chemical resistance or silicone seals for low-temperature flexibility. Note that 440C bearings carry a lower dynamic load rating of approximately 1.75kN due to reduced hardness versus GCr15 chrome steel. Indicate the operating environment when submitting your inquiry.
