Our sealed deep groove ball bearings are single-row radial ball bearings with double rubber seals (2RS)—contact lips in synthetic rubber molded to a steel plate for grease retention, contamination resistance, and factory permanently lubricated service. Catalog spans 6200 series 2RS/RS types, shielded types (ZZ) for clean high-speed zones, and miniature 608zz at 8mm x 22mm x 7mm. As a sealed deep groove ball bearings manufacturer and sealed deep groove ball bearings supplier, we ship rolling bearings with low friction and low noise tolerances; MOQ typically starts from 500–1,000 pcs per part number.
Sealed Deep Groove Ball Bearings
How Built-In Rubber Seals Work
The sealing lip makes direct, precise contact with the inner ring. This design creates a continuous physical barrier that optimizes grease retention and provides exceptional contamination resistance. Made from high-quality synthetic rubber molded to a steel plate reinforcement, these seals protect the chrome steel 52100 components from dust, dirt, and moisture, significantly extending the overall grease life and bearing operation.
Shielded vs Sealed: Choosing the Right Setup
| Bearing Type | Design Feature | Contamination Protection | Friction & Speed | Ideal Use Case |
|---|---|---|---|---|
| Open | No closures | None (Requires external lubrication) | Lowest friction, maximum speed | Enclosed gearboxes |
| Shielded (ZZ) | Double metal shields | Fair (Blocks large debris) | Low friction, high speed | Clean, high-speed environments |
| Sealed (2RS) | Double rubber seals | Excellent (Dust & waterproof) | Moderate friction, low noise | Exposed, dirty environments |
Key Benefits of Sealed Deep Groove Ball Bearings
As a premier sealed deep groove ball bearings manufacturer and supplier, we design our rolling bearings to eliminate these exact failure points.
Maximum Protection Against Dust, Dirt, and Moisture
Our 2RS bearings utilize high-efficiency synthetic rubber seals reinforced with a steel plate. These contact seals block fine dust, abrasive grit, and moisture from entering the raceways, ensuring high contamination resistance even in harsh environments.
Pre-Lubricated for Life to Eliminate Maintenance
Every sealed deep groove ball bearing we deliver is permanently lubricated at the factory with premium, high-performance grease.
- Zero Regreasing: Eliminates the need for manual maintenance schedules and expensive automatic lubrication systems.
- Optimal Fill: Packed with the exact grease volume required to minimize friction and heat buildup.
- Cost Savings: Lower labor costs and zero downtime for lubrication maintenance.
Prevention of Grease Leakage in High-Speed Applications
Standard shielded types or open bearings often struggle with grease migration when RPMs climb. Our premium rubber seals provide superior grease retention, locking the lubricant inside the rolling element zone. This constant lubrication path ensures low noise, low friction, and reliable radial load capacity under continuous high-speed operation.
Performance Comparison: Open vs. Shielded vs. Sealed Bearings
| Feature | Open Bearings | Shielded Bearings (ZZ) | Sealed Bearings (2RS) |
|---|---|---|---|
| Contamination Resistance | None | Moderate (Dust only) | Excellent (Dust, Dirt, & Moisture) |
| Grease Retention | Poor | Fair | Maximum |
| Maintenance Required | High / Frequent | None | Zero (Lubricated for Life) |
| Friction Levels | Extremely Low | Low | Low to Moderate |
| Best Used For | Clean, enclosed gearboxes | Clean, high-speed environments | Dirty, dusty, or wet environments |
Sealed Deep Groove Ball Bearing Applications
we design our radial ball bearings to perform reliably across a wide range of rugged and high-speed environments. Because these rolling bearings feature premium rubber seals that offer superior contamination resistance and grease retention, they are the go-to choice for industries throughout the US.
Here is where our permanently lubricated bearings are most commonly put to work:
Electric Motors and Household Appliances
- Electric motor bearings: Our 6200 series and high-speed deep groove ball bearings for electric motors programs are highly sought after for electric motors because they deliver low friction and low noise.
- Household appliances: From washing machines to vacuum cleaners, these bearings ensure smooth, quiet operation over a long grease life.
Automotive Alternators and Wheels
- Alternators: High under-hood temperatures and rapid RPM changes require deep groove bearings that hold their lubrication perfectly.
- Wheel hubs and accessories: The heavy radial load capacity of our bearing steel components keeps passenger vehicles and light trucks moving safely by keeping road debris out of the moving parts.
Agricultural Machinery and Conveyor Systems
- Crop and soil equipment: Out in the field, equipment faces constant exposure to dirt, mud, and water. Our heavy-duty contact seals provide the maximum defense needed to prevent premature failure.
- Conveyor systems: Industrial conveyor lines rely on our sealed deep groove ball bearings to run continuously without the need for constant manual re-greasing, drastically lowering operational downtime.
Choosing the Right Seal Material for Sealed Deep Groove Ball Bearings
Choosing the right rubber seals is the most critical factor in maximizing the grease life and performance of your rolling bearings. As a leading sealed deep groove ball bearings manufacturer and supplier, we equip our single row deep groove radial ball bearings with different synthetic rubber compounds molded over a steel plate to match your specific operating conditions.
NBR (Nitrile Rubber) Seals: The Industry Standard
For most everyday applications, NBR is the go-to choice. It offers excellent contamination resistance, superb grease retention, and high resistance to oils and fuels. It keeps friction and low noise levels perfectly balanced in standard operating environments.
FKM (Viton) Seals: High-Temperature Powerhouse
When your application runs hot, standard rubber seals degrade. FKM seals are engineered for high-temperature environments, maintaining a tight, reliable seal against aggressive chemicals and synthetic lubricants without hardening or cracking.
Silicone Seals: Extreme Thermal Ranges
For specialized machinery facing extreme cold or high heat, silicone seals provide the ultimate flexibility. They ensure low friction and reliable protection where other materials become brittle.
Seal Material Comparison
| Seal Material | Common Designation | Temperature Range | Best For |
|---|---|---|---|
| NBR (Nitrile) | Standard 2RS | -40°F to 230°F (-40°C to 110°C) | Electric motor bearings, household appliances, general machinery |
| FKM (Viton) | V2RS / High-Temp | -20°F to 400°F (-29°C to 204°C) | Automotive alternators, industrial ovens, chemical processing |
| Silicone | S2RS / Extreme | -70°F to 450°F (-56°C to 232°C) | Food processing, outdoor agricultural machinery in extreme climates |
We manufacture our 6200 series, 6300 series, and miniature bearings (like the 8mm x 22mm x 7mm 608zz and 2RS types) with precision-matched seal materials to guarantee the exact radial load capacity and protection your equipment demands.
Sealed Deep Groove Ball Bearing Sizes and Specifications
When sourcing sealed deep groove ball bearings, getting the exact dimensions and load capacities right is critical for application life and performance. As a direct manufacturer and supplier, we maintain strict adherence to global standard specifications to ensure seamless interchangeability.
Understanding Boundary Dimensions
Every standard radial ball bearing is defined by three primary boundary dimensions. These are always measured in millimeters:
Inner Diameter (ID / d): The bore size where the shaft fits.
Outer Diameter (OD / D): The exterior diameter that fits into the housing.
Width (B): The total thickness of the bearing across the inner and outer rings.
How to Read Standard Bearing Part Numbers
Bearing nomenclature tells you exactly what the product is. Let’s decode a common example: 6204-2RS.
| Code Segment | Meaning | Example Breakdown (6204-2RS) |
|---|---|---|
| First Digit (6) | Bearing Type | Single row deep groove ball bearing |
| Second Digit (2) | Dimension Series | Light series (e.g., 6200 series vs. the heavier 6300 series) |
| Last Two Digits (04) | Bore Code | Multiply by 5 to get the ID in mm (04 × 5 = 20mm bore) |
| Suffix (2RS) | Seal Type | 2RS bearings feature rubber seals on both sides |
Note: For miniature sizes like the popular 608zz, the code explicitly states the dimensions, such as a micro 8mm x 22mm x 7mm setup.
Popular Sealed Sizes (6200 Series 2RS)
| Model | ID × OD × W (mm) | Dynamic C (kN) | Static C0 (kN) |
|---|---|---|---|
| 6200-2RS | 10 × 30 × 9 | 5.10 | 2.38 |
| 6204-2RS | 20 × 47 × 14 | 12.7 | 6.55 |
| 6205-2RS | 25 × 52 × 15 | 14.0 | 7.85 |
| 608-2RS | 8 × 22 × 7 | 3.32 | 1.38 |
Load Ratings: Static vs. Dynamic Capacity
Choosing the right radial load capacity prevents premature failure under operating stress.
- Dynamic Load Rating ($C$): The maximum load a bearing can endure while rotating before showing signs of material fatigue. Use this for high-speed, continuous-motion applications like electric motor bearings.
- Static Load Rating ($C_0$): The maximum load the bearing can support when stationary or rotating at extremely low speeds without permanent deformation of the raceways or rolling elements.
We manufacture our entire catalog using high-grade chrome steel 52100 (bearing steel) to maximize both static and dynamic limits while maintaining low noise and low friction performance. Standard production includes normal clearance, but we also supply clearance C3 options for applications involving high heat or heavy interference fits.
Installation and Maintenance Tips
Getting the most out of your sealed deep groove ball bearings comes down to correct installation and knowing how to spot early signs of trouble. we see firsthand how proper handling directly impacts grease life and equipment uptime.
Proper Mounting Tools to Avoid Seal Damage
Never hammer a bearing directly. Rough installation easily distorts the rubber seals or the internal steel plate reinforcement, leading to immediate grease leakage and premature failure.
- Use a press sleeve or bearing fitting tool: Always apply mounting force evenly across the face of the ring with the press fit (usually the inner ring for shaft applications).
- Align perfectly: Ensure the bearing goes on straight to avoid scoring the shaft or damaging the single row deep groove raceways.
- Protect the contact seals: Keep sharp tools completely away from the synthetic rubber lips during assembly.
Signs of Bearing Wear and Failure
Watch for these common warning signs that your rolling bearings need replacement:
| Symptom | Potential Root Cause |
|---|---|
| Increased operational noise | Raceway pitting, lack of lubrication, or internal contamination |
| Excessive vibration | Misalignment or damaged rolling elements |
| High running temperatures | Overloading, excessive speed, or internal friction from degraded grease |
| Visible grease leakage | Compromised or warped 2RS bearings seals |
Why You Should Never Clean or Re-Grease a Sealed Bearing
We engineer our sealed radial ball bearings to be permanently lubricated for life. Trying to service them usually does more harm than good.
- Destroying the seal lip: Prying off a synthetic rubber seal permanently bends the internal steel stiffener, ruining its contamination resistance.
- Grease incompatibility: Injecting a different grease type can cause a chemical reaction, thinning the lubricant and causing it to run out of the bearing.
- Introducing dirt: The moment you open a sealed unit, you invite airborne dust directly into the high-precision chrome steel 52100 tracks, defeating the entire purpose of the seal.
When a sealed bearing shows signs of wear, the only reliable solution is a direct replacement.
Ordering Information & Lead Times
Factory programs for sealed deep groove ball bearings cover standard 6200 series 2RS catalog lines, RS single-seal builds, and double metal-shielded ZZ alternates. Share bore, seal compound (NBR / FKM / silicone), and monthly volume for a line-item quote.
| Program | Typical MOQ | Lead Time | Notes |
|---|---|---|---|
| 6200 / 6300 series 2RS | 500–1,000 pcs | 12–20 business days | NBR seals · factory pre-greased |
| Miniature 608-2RS / 608zz | 2,000–5,000 pcs | 15–25 business days | 8mm x 22mm x 7mm · shielded or sealed |
| High-temp FKM / V2RS | 1,000+ pcs | 20–30 business days | Automotive / oven-duty builds |
For radial ball bearings load checks before ordering, see axial load vs radial load in deep groove ball bearings.
Request a quote with part numbers, seal suffix, and destination port.
FAQs About Sealed Deep Groove Ball Bearings
Can I remove the seals from a sealed bearing?
Yes, you can pop the rubber seals out using a small pick or screwdriver, but we don’t recommend it. Removing the contact seals converts the unit into an open bearing, exposing the factory grease to dust and moisture. Doing this instantly voids our warranty and drastically shortens the grease life.
What is the temperature limit for a standard 2RS bearing?
Standard 2RS bearings use synthetic rubber (NBR) seals and a high-grade lithium-based grease. This setup runs flawlessly in standard US industrial applications within a specific temperature bracket.
| Component / Material | Standard Temperature Range |
|---|---|
| NBR Rubber Seals | -20°F to 230°F (-30°C to 110°C) |
| Standard Factory Grease | -20°F to 250°F (-30°C to 120°C) |
Note: For extreme thermal ranges like commercial ovens or freezer systems, we switch production to FKM (Viton) or silicone seals.
How long do sealed deep groove ball bearings last?
There is no single expiration date, but a high-quality single row deep groove bearing can last anywhere from several years to over a decade depending on operating conditions. As a leading sealed deep groove ball bearings manufacturer, we design our parts for optimal grease retention to maximize service life.
Lifespan depends heavily on three main factors:
Load capacity: Staying within the rated radial load capacity limits.
Operating speeds: High-speed applications generate more friction and heat.
Environmental contamination: Exposure to heavy water washdowns or abrasive dirt.
What is the difference between RS and 2RS seals?
The naming convention tells you exactly how many sides of the bearing are protected by a rubber seal.
- RS Bearing: Features a single rubber seal on one side. The other side remains open. This type is typically used when the bearing is housed inside a closed gearbox where oil splashes from one side, but protection is needed on the outer facing side.
- 2RS Bearings: Features double metal-reinforced synthetic rubber seals (one on each side). This provides total contamination resistance and makes the unit permanently lubricated for life. As an established sealed deep groove ball bearings supplier, 2RS is our most requested configuration across the US market.
Reviews
There are no reviews yet.