ISK Bearings | B2B Bearing Wholesale
The 6204 Deep Groove Ball Bearing is a common bearing model that is widely used in various machinery and equipment. In this article, we will delve into the dimensions of the 6204 bearing.
*ISK bearing precision conforms to internationally recognized standards: ABEC、ISO 492, DIN 620, and JIS B1514.
| Bore (Inner Diameter), d | 20 mm (0.7874 in) |
|---|---|
| Outer Diameter, D | 47 mm (1.8504 in) |
| Width, B | 14 mm (0.5512 in) |
| Weight | 106 g |
| Dynamic | 1000 kgf |
| Static | 635 kgf |
| RPM (2RS / ZZ) | 15,000 RPM |
| RPM (DU / DDU) | 11,000 RPM |
| RPM (Open Type) | 18,000 RPM |
The inner diameter of the 6204 bearing is 20 millimeters. It can accommodate shafts with a diameter of 20 millimeters.
The outer diameter of the 6204 bearing is 47 millimeters. This refers to the diameter of the outer ring of the bearing. Make sure that your application space can accommodate the outer diameter of the 6204 bearing.
The 6204 bearing is a common and widely used bearing model. Understanding its inner diameter, outer diameter, and width dimensions is crucial for selecting the appropriate bearing. Based on your application requirements, load, speed, temperature, and quality criteria, choose the suitable size of the 6204 bearing for your application to ensure good performance and reliability.
The 6204 bearing is typically composed of an inner ring, outer ring, ball elements, and a cage. The groove in the raceway is slightly larger than the radius of the steel balls. Due to the point contact between the balls and the raceway, the 6204 bearing can withstand both axial loads in both directions and radial loads. It is commonly used in pairs under normal conditions to minimize the internal axial forces caused by the load and to primarily handle radial loads.
The sealing covers for the 6204 bearing mainly come in three types: ZZ, 2RS, and OPEN.
6204 OPEN, 6204 ZZ, and 6204 RS are different outer cover modes of the bearing. In this article, we will introduce these outer cover modes to help you choose the appropriate bearing protection method that suits your needs.
The 6204 OPEN type bearing cover is a design without a cover, allowing the internal components of the bearing to be exposed to the external environment. This design makes the bearing more susceptible to contamination from dirt, dust, and other external particles.
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6204ZZ refers to the 6204 bearing with metal shields as the outer cover. The metal shields effectively block dust, contaminants, and other external particles from entering while retaining the lubricant within the bearing.
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6204 RS refers to the 6204 bearing with rubber seals as the outer cover. The rubber seals provide enhanced protection by effectively blocking moisture, dust, and other contaminants from entering. This sealing method is commonly used in harsh environments and applications that require stricter protection.
Application environment: Determine the potential sources of contamination and other external particles in your application environment. Based on the environmental conditions, choose between open type, metal shields, or rubber seals to provide the appropriate protection.
Precision and speed requirements: Consider the precision and speed requirements of your application. Open type bearings are typically suitable for low precision and lower speed applications, while metal shields and rubber seals offer higher protection and are suitable for medium and high precision requirements.
Maintenance requirements: Consider your maintenance needs for the bearings. Open type bearings require regular cleaning and lubrication, while metal shields and rubber seals can reduce maintenance requirements.
6204 OPEN, 6204 ZZ, and 6204 RS are different outer cover modes of bearings that provide varying degrees of protection and support. Depending on your application environment, precision and speed requirements, as well as maintenance needs, choose the appropriate outer cover mode to ensure the normal operation of the bearing and extend its lifespan.
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Indicating the sealing or protection method of the bearing. "Z" represents metal shields, and "2Z" represents a bearing with two metal shields.
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Indicating the sealing method of the bearing. "R" represents a bearing with a single rubber seal, while "2R" represents a bearing with two rubber seals.
It is widely used in components such as engines, transmissions, wheel hubs, and electric motors. The bearings are designed to withstand high-speed rotation and loads, providing smooth operation and durability, thus ensuring the reliability and performance of automobiles.
Whether it's industrial machinery, equipment, or household appliances, bearings are essential components. They are used to support rotating shafts, bear loads, reduce friction, and provide smooth motion. Various sectors of the manufacturing industry, such as wind power generation, food processing, printing machinery, rely on high-quality bearings.
From harvesters to irrigation equipment, bearings play a vital role in agricultural machinery. They can withstand harsh environmental conditions and high loads, enabling agricultural machinery to operate smoothly and improve work efficiency.
Widely used in various electric motors, including household appliances, industrial motors, and power tools, among others. The high-speed operation and durability of bearings make them essential components in electric motors, ensuring smooth operation and high efficiency.
The 6204 bearing is a key component widely used in multiple industries. From the automotive industry to the manufacturing industry, from agricultural machinery to the electrical industry, and from compressors to pumps, bearings play an indispensable role in many critical equipment. Their high-speed operation, durability, and reliability make them the preferred choice in these industries.
Further reading:
6203 Bearing Dimensions | Deep Groove Ball Bearings
6205 Bearing Dimensions：Your Ultimate Guide to Sizing
The 6204 deep groove ball bearing has a bore (d) of 20 mm, an outer diameter (D) of 47 mm, and a width (B) of 14 mm, weighing about 106 g. The 6204 bearing has a dynamic load rating of about 1000 kgf and a static load rating of about 635 kgf. The 20 mm bore fits a 20 mm shaft, while the 47 mm outer diameter corresponds to the housing bore. Before installation, confirm that your shaft diameter, housing bore, and axial space match these three dimensions for correct fit and operation.
In the 6204 bearing designation, "6" indicates a single-row deep groove ball bearing, "2" indicates the light series, and "04" indicates a 20 mm bore (from 04 onward, multiply by 5). The suffix indicates the seal or shield type: Z for a single metal shield, 2Z (ZZ) for two metal shields, R (RS) for a single rubber seal, and 2R (2RS) for two rubber seals. Understanding the code helps you communicate specifications accurately during quoting and stocking, avoiding receiving a bearing with the wrong protection type.
The 6204 OPEN, 6204ZZ, and 6204 RS differ in seal/shield type and suitable environment. OPEN is an unshielded design with lower friction but requires regular cleaning and lubrication, suiting clean environments with frequent maintenance access. ZZ uses metal shields that block dust and particles, suiting moderately contaminated environments with lower maintenance needs. RS uses rubber seals for higher protection, suiting harsher environments with moisture, oil, or chemicals, and requires the least maintenance. Choose based on three factors together: contamination sources, precision and speed requirements, and maintenance frequency.
The 6204 deep groove ball bearing consists of four main parts: the inner ring, outer ring, steel balls, and cage. The inner ring mounts on the rotating shaft, and its raceway contacts the balls to carry the load; the outer ring mounts in the housing and provides the ball raceway; the steel balls run between the two rings in point contact, carrying both radial and bidirectional axial loads; the cage maintains ball spacing to prevent the balls from rubbing against each other and to ensure smooth running. Understanding the structure helps identify which part may be causing noise or roughness.
The 6204 bearing has a dynamic load rating of about 1000 kgf and a static load rating of about 635 kgf, suiting light to moderate axial and radial loads, and it can handle high-speed rotation. The 6204 is made from high-quality steel (GCr15) and features low friction, low noise, and low vibration. Actual achievable speed and load are affected by lubrication method, seal/shield type, mounting precision, and operating temperature. If your application approaches the load or speed limits, we suggest sharing your actual operating parameters so we can help assess whether the 6204 is a suitable choice or whether another series is needed.
If a 6204 bearing makes noise or runs rough, it does not always mean the bearing itself has failed. Drive-train abnormalities have several contributing factors, and common root causes include improper press-fit conditions, the mounting environment, lubricant selection, or external contamination entering the bearing. For example, an OPEN type is more prone to contamination-related noise in dusty or humid environments. We suggest first checking the mounting method, lubrication condition, and operating environment; for further diagnosis, you can provide the bearing model, mounting conditions, and a description of the issue so we can help assess the root cause.
Rust or a shorter service life on a 6204 bearing is often linked to environmental moisture, insufficient sealing protection, or lubrication failure. Using an OPEN type or a lower-protection type in a humid, wet, or chemically active environment allows contaminants and moisture to more easily enter the bearing and affect its life; the RS rubber seal offers higher protection in such harsh conditions. Assessing a life issue requires considering load, speed, temperature, lubrication, and seal type together, so we suggest providing your actual operating environment and current situation so we can help assess a suitable type and specification.
Although the 6204, 6304, and 6205 bearings have similar names, they differ in dimensions and cannot be directly interchanged. For example, the 6204 and 6304 both have a 20 mm bore, but the 6304 belongs to the medium series with a larger outer diameter and width and higher load capacity; the 6205 has a 25 mm bore. When selecting, the bore, outer diameter, and width must all match your equipment structure—you cannot look at just one dimension. If you are evaluating an alternative model or are unsure whether an existing specification fits, we suggest providing the shaft diameter, housing bore, and load conditions so we can help determine the right choice.
The minimum order quantity and sample availability for 6204 bearings vary by seal/shield type, precision requirement, quantity, and whether customization is needed, so we suggest sharing your requirements so we can confirm. ISK Bearings primarily serves B2B manufacturers, equipment builders, and brand owners; if you have a defined application and annual usage, please include those details so we can arrange a suitable supply and lead-time plan. Single-piece requests or requests without a defined application are less suited to the standard supply process.
When requesting a quote for 6204 bearings, we suggest providing: (1) the bearing model including the seal/shield suffix (e.g., ZZ, 2RS, or OPEN); (2) the application and equipment type; (3) load and speed conditions; (4) the operating environment (humid, dusty, high-temperature, etc.); and (5) required quantity or annual usage. If you have a drawing or sample, including it speeds up confirmation. The more complete the information, the better we can help determine whether the 6204 is a suitable choice or recommend a more appropriate type and specification, reducing back-and-forth during selection.
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