Bearings ensure smooth operation, reduce friction, and extend the life of components. One bearing that stands out for its versatility and performance is the 6204 bearing. Known for its durability and compact design, the 6204 bearing is suitable for various applications across industries.
This guide dives deep into everything you need to know about 6204 bearings, from specific dimensions and components to available types and practical applications. Whether you need a high-performance or compact design, the 6204 bearing is an ideal choice for a wide range of mechanical uses.
Information About 6204 bearing
| Part Number | 6204 | Cage Material | Nylon |
| System of Measurement | Metric | Radial Dynamic Load | 1390 lbf |
| Bearing Type | Ball | Static Radial Load | 1020 lbf |
| For Load Direction | Radial | Max Speed (X1000 rpm) | 15 |
| Construction | Single Row | Lubrication | Required |
| Inner Ring Type | Standard | Shaft Mount Type | Press Fit |
| Seal Type | Open,ZZ,2RS | Temperature Range | -30° to 110 °C |
| Bore Dia | 20 mm | ABEC Rating | ABEC3(Available in ABEC3/5/7) |
| Bore Dia Tolerance | -0.002mm to 0 | Radial Clearance Trade No. | C0/C3/C4 （Available in C1/2/4/5/6) |
| Outer Dia | 47mm | Radial Clearance | 0.002mm to 0.013mm |
| Outer Dia Tolerance | -0.002mm to 0 | RoHS | Compliant |
| Width | 14 mm | REACH | Compliant |
| Width Tolerance | -0.01mm to 0 | Weight | 102 g |
| Bearing material | Chrome Steel SAE-52100 | Lubrication | Chevron SRI-2 Grease |
| Sealed type | Open,Shield,Rubber |
6204 Bearing Dimensions
The 6204 bearing is part of the deep groove radial ball bearing family with a standard radial internal clearance. Its dimensions are 20x47x14mm, making it ideal for applications requiring durability in limited spaces.
The 6204 bearing is part of the thin-section deep groove radial ball bearing family. Here are the essential dimensions that define it:
- The inner diameter of the 6204 bearing is 20mm and can accommodate a shaft with a diameter of 8 mm. When you select 6204 bearings, make sure to confirm the size of the shaft.
- The outer diameter of 6204 bearing is 47mm. This refers to the diameter size of the outer ring of the 6204 bearing. When you choose the 6204 bearing, make sure the application space can accommodate the outer ring size.
- The width of the 6204 bearing is 14mm. Width refers to the distance between the inner and outer rings of the bearing. Ensure the bearing width is sized appropriately for your application for proper installation and operation.
Components of 6204 Bearings
The 6204 bearing comprises four key parts: the inner ring, outer ring, rolling elements (balls), and retainer (cage), usually made of steel. Together, these components reduce friction and enhance performance in rotational applications.
Inner and Outer Rings: These rings form the raceway for the rolling elements. The inner ring fits onto the rotating shaft, while the outer ring is secured in the housing.
Ball Bearings: These steel balls reduce friction between the inner and outer rings, ensuring efficient rotational movement.
Cage: The cage ensures even spacing of balls, preventing contact and reducing wear.
Lubrication: The bearing often comes pre-lubricated but can be periodically re-lubricated for extended lifespan.
3 Types of 6204 Bearings
The 6204 bearing comes in several variants, each designed to handle different operating environments and conditions:
- 6204 Open Type:
This version features no seals or shields, allowing for easy maintenance and re-lubrication. It’s best suited for applications in cleaner environments where dust and moisture exposure is minimal. - 6204ZZ (Metal Shielded):
The ZZ type has metal shields on both sides, protecting the internal components from contaminants like dust and debris. It’s ideal for indoor machinery or applications with moderate exposure to external elements. - 6204-2RS (Rubber Sealed):
The 2RS version is sealed with rubber on both sides(some time vendors use 6204RS), offering superior protection against water, dirt, and other contaminants. This makes it suitable for harsher environments where contamination could affect performance.
Let us dig deep in these types and provide you with strong technical support in choosing the right bearing.
Bearing seals are typically made of nitrile rubber. High temperature applications commonly use silicone or fluorine rubbers.
What Is the Difference Between 6204ZZ and 6204-2RS?
6204-2RS and 6204-ZZ are ball bearings with a diameter of 30 mm that are used in many applications. The 6204-2RS ball bearing has two contact rubber seals, one on each side of the ball bearing. 6204-ZZ ball bearings have two non-contact metal shields on each side.
If your application requires a 6204 ball bearing with only one seal or shield you can get one of the shields or seals off of this ball bearing. As a high quality ball bearing, this 30mm inch bearing can handle electric motor demands.
As indicated by the suffix letters, the 6204 bearing has the following seal and dust cover configurations:
- ZZ type: It refers to radial ball bearings with metal dust covers.
- Shield/Protected: Generally, ZZ bearings have a steel or other metal shield on both sides. In addition to protecting the bearing interior from dust, these shields also block some light contaminants from entering.
- Lubrication: Guards prevent the lubricant inside the bearing from escaping, minimizing contamination risks.
Precision Grades for 6204 Bearing
6204 bearings are typically manufactured in precision grades ranging from ABEC-1,3,5,7 for high-speed or high-accuracy applications. These grades dictate tighter tolerances, reduced vibration, and minimal radial runout. Here’s the specific grade details:
| Precision grade | ID tolerance | OD tolerance | Width tolerance | Application |
| ABEC-1 | ±0.016 mm | ±0.025 mm | ±0.021 mm | Trolley,hand tools,Conveyors |
| ABEC-3 | ±0.010 mm | ±0.015 mm | ±0.010 mm | Electrical Motor,Fans,Household appliances |
| ABEC-5 | ±0.005 mm | ±0.010 mm | ±0.005 mm | Industrial robots,Medical equipment |
| ABEC-7 | ±0.003 mm | ±0.005 mm | ±0.003 mm | Aerospace components,CNC machine,Racing vehicles |
Typical Applications of 6204 Bearings
6204 bearings are often used in a wide range of industries and applications due to their miniature size, load capacity, and versatility, here are a few of the industries where it is applicable:
6204 bearings are commonly used in:
- Automotive Components: Providing rotational support in high-load areas.
- Motorcycle: Reducing wear in motorcycle/dirt bike/ATV wheel bearing components.
- .Heavy Machinery: Handling radial and axial loads.
- Bicycles and Conveyor Systems: Providing smooth, efficient movement in various equipment.
6200 Series ball bearing size chart
| Bearing No. | Bore(d) (mm) | Outer(D) (mm) | Width(B) (mm) | r (mm) | Dynamic (kgf) | Static (kgf) | Weight (g) |
| 6200 | 10 | 30 | 9 | 1 | 400 | 229 | 32 |
| 6201 | 12 | 32 | 10 | 1 | 535 | 305 | 37 |
| 6202 | 15 | 35 | 11 | 1 | 600 | 360 | 45 |
| 6203 | 17 | 40 | 12 | 1 | 750 | 460 | 65 |
| 6204 | 20 | 47 | 14 | 1.5 | 1000 | 635 | 106 |
| 6205 | 25 | 52 | 15 | 1.5 | 1100 | 730 | 128 |
| 6206 | 30 | 62 | 16 | 1.5 | 1530 | 1050 | 199 |
| 6207 | 35 | 72 | 17 | 2 | 2010 | 1430 | 288 |
| 6208 | 40 | 80 | 18 | 2 | 2280 | 1650 | 366 |
| 6209 | 45 | 85 | 19 | 2 | 2570 | 1880 | 407 |
| 6210 | 50 | 90 | 20 | 2 | 2750 | 2100 | 463 |
Conclusion
The 6204 bearing is essential across industries for its ability to handle radial and axial loads while maintaining a compact design. Choose the right type—open, ZZ, or 2RS—for long-lasting performance and minimal maintenance.
If you’re ready to upgrade with high-quality 6204 bearings, contact BYWB bearings today to explore our range and experience unmatched durability and precision.
