Introduction to 608 Bearings
608 bearings are among the most widely used bearings in the world, known for their high performance and versatility. They can be found in numerous applications, from everyday items like skateboards and rollerblades to more industrial uses like motors, medical equipment, and manufacturing machinery.
In this guide, we will explore everything you need to know about 608 bearing dimensions, their various applications, particularly in skateboarding, and how to choose the best 608 bearing for your needs. This article is designed to help both newcomers and seasoned professionals understand the nuances of 608 bearings, ensuring they make informed decisions for their projects and products.
What is a 608 Bearing?
A 608 bearing is a type of deep groove ball bearing, a design that is essential for applications requiring smooth and low-friction motion. 608 bearings are most commonly used in smaller, high-speed applications due to their compact size and ability to handle radial and axial loads. The dimensions of a standard 608 bearing are:
- Inner diameter (ID): 8 mm
- Outer diameter (OD): 22 mm
- Width (W): 7 mm
The 608 bearing is designed to be efficient at high speeds while reducing the need for constant lubrication, making it ideal for machinery where continuous movement is required. Its size and design make it a go-to bearing for industries ranging from consumer goods to heavy machinery.
Why 608 Bearings are So Popular
The 608 bearing has become a go-to option for various applications, especially in environments requiring smooth and low-friction rotation. The deep groove ball bearing design, characterized by its inner and outer raceway grooves, allows it to handle both radial and axial loads, making it a versatile option for many industries.
For example, in skateboarding, 608 bearings are the industry standard, ensuring that the wheels of the skateboard rotate smoothly. Similarly, in small motors, industrial equipment, and even medical devices, 608 bearings are used to ensure long-lasting, efficient operation.
Understanding the 608 Bearing Dimensions
To understand the performance and compatibility of a 608 bearing, it’s crucial to know its exact dimensions. These are standard across the bearing market but can have slight variations depending on the type and manufacturer.
What size is a 608 bearing?
Inner Diameter (ID): The inner diameter of a 608 bearing is 8 mm. This diameter corresponds to the size of the axle or shaft the bearing fits onto. A precise fit is critical to ensure smooth rotation and minimal wear on the bearing and axle.
Outer Diameter (OD): The outer diameter is 22 mm. The outer diameter refers to the size of the bearing’s outer race, which determines the bearing’s fit within its housing.
Width (W): The width of the 608 bearing is 7 mm. The width is critical for ensuring proper load distribution and for determining how the bearing will fit into the surrounding equipment.
Types of 608 Bearings
While the standard 608 bearing dimensions remain consistent, you can find 608 bearings in different variations depending on the required features. Some of the most common variations include:
Open 608 Bearings: These bearings have no shields or seals, making them suitable for applications where the bearing will be regularly cleaned and maintained.
Shielded 608ZZ Bearings: Shielded bearings have a thin metal shield that prevents debris from entering the bearing which called 608ZZ bearing, helping extend its lifespan while still allowing for relatively high-speed performance.
Sealed 608RS Bearings: Sealed bearings are fully enclosed with rubber seals on both sides which like 608-2RS Bearing, offering the best protection against dirt, moisture, and other contaminants, making them perfect for outdoor applications or environments where cleanliness is critical.
Material Options for 608 Bearings
Choosing the right material is vital for the performance, longevity, and efficiency of a 608 bearing. Various materials offer different advantages, so it’s essential to select the right one for your application.
Stainless Steel: Stainless steel is highly corrosion-resistant, making it ideal for use in moist or humid environments. It is durable and provides reliable performance, especially in applications where the bearing may be exposed to the elements.
Carbon Steel: Carbon steel is often used in budget-friendly bearings. While it doesn’t offer the same level of corrosion resistance as stainless steel, it provides excellent strength and durability.
Ceramic: Hybrid ceramic 608 bearings use ceramic balls, which offer a smooth surface for lower friction. These bearings are often preferred for high-performance applications due to their ability to handle higher speeds and resist wear over time.
Chrome Steel: Chrome steel bearings are another option, offering excellent hardness and wear resistance. These are widely used in automotive, manufacturing, and high-precision applications.If chrome steel used gold plated , which make bearing very shinny , see more info check out our youtube https://youtu.be/KcVciSNrVlQ .
Heat Treatment for 608 Bearings
Proper heat treatment of the bearing materials is critical for enhancing the bearing’s strength, durability, and resistance to wear. Heat treatment processes like quenching and tempering increase the hardness of the steel, ensuring the bearing can handle high loads without deformations.
What is a 608 bearing used for?
Choosing the right 608 bearing depends on several factors, such as the environment in which it will operate, the speed at which it needs to rotate, the type of load it will support, and whether you need additional protection from contaminants.
Key Factors to Consider
Speed Requirements: If your application requires high-speed performance, ceramic 608 bearings are often the best choice due to their low friction properties.
Environmental Conditions: Consider whether the bearing will be exposed to dirt, moisture, or harsh chemicals. In such cases, sealed or shielded 608 bearings are ideal to protect against contaminants.
Load Capacity: The load capacity is an essential factor in bearing selection. 608 bearings can handle moderate radial loads and axial loads, but for heavy-duty applications, you may need to opt for a bearing designed for higher load tolerance.
Cost vs. Performance: Stainless steel bearings provide durability and resistance to corrosion, while ceramic bearings offer high performance and extended lifespan but may come at a higher cost. Balancing cost and performance will depend on your application.
Maintenance and Care of 608 Bearings
Proper maintenance is key to extending the lifespan of 608 bearings, particularly in high-performance applications like skateboarding. Regular cleaning, lubrication, and inspection are essential to keep bearings in top condition.
Steps to Maintain Your 608 Bearings
Cleaning: Regularly clean the bearings to remove dirt, dust, and grime that may accumulate over time. Use a bearing cleaning tool or solvent and ensure the bearings are completely dry before reassembling them.
Lubrication: Apply lubrication to ensure the bearings rotate smoothly. Use a bearing-specific lubricant to avoid excess friction and wear.
Inspection: Regularly check for wear and tear, corrosion, or damage. If the bearing feels rough or makes unusual noise during rotation, it may be time to replace it.
Chrome Steel vs. Ceramic 608 Bearings: Which One to Choose?
When selecting the right 608 bearing for your application, the material plays a crucial role in determining the bearing’s performance, durability, and overall efficiency. The two most common materials used for 608 bearings are Chrome Steel and Ceramic, each offering distinct advantages depending on your needs. In this section, we’ll dive deeper into the differences between Chrome Steel and Ceramic 608 bearings, and help you understand how to choose the right one for your specific application.
Chrome Steel 608 Bearings
Chrome steel (also known as AISI 52100 steel) is the traditional material used in 608 bearings. It is a high-carbon steel alloy known for its strength, durability, and resistance to wear, making it the go-to choice for most applications.If you use 608 bearing by gold plated, that’s looks very shinny, see more info visit us video!
Key Features of Chrome Steel 608 Bearings:
Durability: Chrome steel bearings are tough and can withstand moderate loads and high speeds. They are ideal for environments where the bearing will be exposed to rough conditions but doesn’t require extremely high performance or resistance to wear.
Corrosion Resistance: Chrome steel bearings are more prone to corrosion compared to ceramic bearings, especially when exposed to moisture, dirt, and other contaminants. However, shielded or sealed chrome steel bearings can offer some level of protection.
Cost-Effective: Chrome steel bearings are generally less expensive than their ceramic counterparts, making them a more budget-friendly option for everyday applications or for users who don’t need extreme performance.
Load Handling: Chrome steel bearings are excellent at handling radial and axial loads. They are commonly used in industrial machinery, electric motors, and other general-purpose applications.
Applications for Chrome Steel 608 Bearings:
- Skateboards: Chrome steel bearings are a popular choice for recreational and entry-level skateboarders. They provide smooth performance while being more affordable.
- Power Tools and Small Motors: Chrome steel bearings can be found in power tools and small motors where high speed and moderate load handling are necessary.
- Everyday Consumer Goods: Chrome steel bearings are commonly used in fans, rollerblades, bicycles, and other consumer goods.
Ceramic 608 Bearings
Ceramic 608 bearings are a high-performance alternative to chrome steel bearings, using ceramic balls instead of steel balls. The ceramic material used in bearings is often made from silicon nitride (Si3N4), which offers exceptional properties such as lower friction, higher hardness, and superior wear resistance.
Key Features of Ceramic 608 Bearings:
Lower Friction: Ceramic balls have a much smoother surface compared to steel balls, resulting in significantly lower friction. This means ceramic 608 bearings can operate at higher speeds while generating less heat, leading to longer life and better performance.
Corrosion Resistance: One of the most significant advantages of ceramic bearings is their excellent corrosion resistance. Unlike steel, ceramic materials do not rust, which makes them ideal for use in moist or corrosive environments.
Lightweight: Ceramic balls are significantly lighter than steel balls, which results in less weight and better performance, especially in high-speed applications. This lightweight nature also helps to reduce energy consumption.
High Performance: Ceramic 608 bearings are designed for high-speed, low-resistance applications. They excel in environments where performance is critical, such as in professional skateboarding, bicycling, and even aerospace.
Higher Cost: Ceramic bearings are generally more expensive than chrome steel bearings due to the advanced manufacturing process and materials used. However, for high-end applications where performance is the priority, the extra cost is often justified.
Applications for Ceramic 608 Bearings:
- Professional Skateboarding: Ceramic 608 bearings are the preferred choice for competitive skateboarders, providing the smoothest ride and fastest speeds.
- High-Speed Motors: Ceramic bearings are ideal for motors and machinery that need to operate at high speeds and require the utmost precision, such as in drones or robotics.
- Aerospace and Medical Equipment: Due to their lightweight and corrosion-resistant properties, ceramic bearings are used in industries such as aerospace and medical devices, where both high performance and reliability are critical.
Chrome Steel vs. Ceramic 608 Bearings: A Comparison
| Feature | Chrome Steel 608 Bearings | Ceramic 608 Bearings |
| Friction | Higher friction, generates heat | Lower friction, minimal heat |
| Corrosion Resistance | Susceptible to rust and corrosion | Excellent corrosion resistance |
| Durability | Good, but may wear faster under harsh conditions | Exceptional, lasts longer in high-speed and harsh environments |
| Weight | Heavier due to steel balls | Lighter, leading to faster speeds |
| Cost | More affordable | Higher cost, but worth the performance |
| Load Handling | Handles moderate radial and axial loads well | Handles moderate to high radial and axial loads with less wear |
| Ideal For | General-purpose applications, recreational skateboarding | High-performance applications, professional skateboarding, motorsports |
| Speed | Moderate to high-speed, but less efficient at very high speeds | Superior speed capabilities, ideal for fast-moving applications |
How to Choose Between Chrome Steel and Ceramic 608 Bearings
The decision between chrome steel and ceramic 608 bearings depends primarily on the specific requirements of your application. Here are some key factors to consider when making your choice:
1. Performance Requirements
- If you require high-speed performance and minimal friction, ceramic 608 bearings are the clear winner. Ceramic balls provide much lower friction, allowing them to spin faster with less effort. If you’re a professional skateboarder or use machinery that operates at high speeds, ceramic bearings will provide the smoothest and fastest performance.
- For general-purpose applications, where performance isn’t the top priority and cost is more of a concern, chrome steel 608 bearings can still offer adequate performance, particularly in lower-speed applications.
2. Environmental Conditions
- If your bearings will be exposed to moisture, dust, or other contaminants, ceramic 608 bearings are more suitable because they are corrosion-resistant and maintain their performance even in harsh environments.
- Chrome steel bearings can also work well in many environments, but they may require additional protection, such as seals or shields, to prevent rust and damage from contaminants.
3. Cost Considerations
- If you’re on a budget, chrome steel bearings are the more economical choice. They provide solid performance for a fraction of the cost of ceramic bearings, making them ideal for entry-level skateboarders or general applications where performance needs aren’t extreme.
- Ceramic bearings come at a higher cost, but if you’re seeking the best performance or need bearings that can handle high speeds and extreme conditions, the investment is worth it.
4. Weight and Speed
- For applications where lightweight and speed are paramount, such as professional skateboarding or high-performance motors, ceramic bearings offer a significant advantage due to their lighter weight and lower friction.
- Chrome steel bearings are heavier, which may result in slightly slower speeds or higher energy consumption in speed-intensive applications, but they are still sufficient for most everyday uses.
5. Longevity and Maintenance
- Ceramic bearings generally last longer, as they are more resistant to wear and corrosion. They require less maintenance since they don’t rust, making them ideal for applications where reliability over time is crucial.
- Chrome steel bearings may require more frequent maintenance and replacement, especially in high-performance or exposed environments. Sealed or shielded chrome steel bearings can help improve longevity but still may not match the wear resistance of ceramics.
Miniature bearing size chart
| Bearing No. Open | Boundary dimensions | Basic load ratings KN | Limiting speeds RPM | Mass g | ||||||||||
| d | D | B | B1 | D1 | D2 | C1 | C2 | rmin | dynamic Cr | static Cor | Grease ZZ 2RS | Oil open | ||
| 618/2(682) | 2 | 5 | 1.5 | 2.3 | 6.1 | 6.1 | 0.5 | 0.6 | 0.1 | 0.13 | 0.05 | 38000 | 48000 | 0.15 |
| 628/2(MR52) | 2 | 5 | 2 | 2.5 | 6.2 | 6.2 | 0.6 | 0.6 | 0.1 | 0.15 | 0.05 | 38000 | 48000 | 0.22 |
| 619/2(692) | 2 | 6 | 2.3 | 3 | 7.5 | 7.5 | 0.6 | 0.8 | 0.1 | 0.25 | 0.08 | 38000 | 48000 | 0.30 |
| MR62 | 2 | 6 | 2.5 | – | 7.2 | – | 0.6 | – | 0.1 | 0.25 | 0.08 | 38000 | 48000 | 0.30 |
| 629/2 | 2 | 6 | 2.8 | 2.8 | – | – | – | – | 0.15 | 0.25 | 0.08 | 38000 | 48000 | 0.40 |
| 639/2 | 2 | 6 | 3 | 3 | – | – | – | – | 0.15 | 0.28 | 0.09 | 38000 | 48000 | 0.50 |
| 602 | 2 | 7 | 2.8 | 3.5 | 8.5 | 8.5 | 0.7 | 0.9 | 0.15 | 0.29 | 0.12 | 38000 | 48000 | 0.70 |
| MR72 | 2 | 7 | 2.5 | 3 | 8.2 | 8.2 | 0.6 | 0.6 | 0.15 | 0.29 | 0.12 | 38000 | 48000 | 0.70 |
| 618/2.5 | 2.5 | 6 | 1.8 | 2.6 | 7.1 | 7.1 | 0.5 | 0.8 | 0.15 | 0.15 | 0.06 | 38000 | 48000 | 0.25 |
| 628/2.5 | 2.5 | 6 | 2.5 | 2.5 | 7.2 | – | 0.7 | – | 0.15 | 0.15 | 0.06 | 38000 | 48000 | 0.30 |
| 619/2.5 | 2.5 | 7 | 2.5 | 3.5 | 8.5 | 8.5 | 0.7 | 0.9 | 0.15 | 0.29 | 0.12 | 38000 | 48000 | 0.60 |
| 639/2.5 | 2.5 | 7 | 3.5 | 3.5 | 8.5 | – | 0.7 | – | 0.15 | 0.29 | 0.12 | 38000 | 48000 | 0.65 |
| MR82/2.5 | 2.5 | 8 | 2.5 | – | 9.2 | – | 0.6 | – | 0.15 | 0.29 | 0.12 | 38000 | 48000 | 0.70 |
| 602/2.5 | 2.5 | 8 | 2.8 | 4 | 9.5 | 9.5 | 0.7 | 0.9 | 0.15 | 0.28 | 0.10 | 38000 | 48000 | 0.80 |
| 673(MR63) | 3 | 6 | 2 | 2.5 | 7.2 | 7.2 | 0.6 | 0.6 | 0.05 | 0.15 | 0.06 | 38000 | 48000 | 0.20 |
| 618/3(683) | 3 | 7 | 2 | 3 | 8.1 | 8.1 | 0.5 | 0.8 | 0.15 | 0.29 | 0.12 | 38000 | 48000 | 0.33 |
| 628/3 | 3 | 7 | 2.5 | 2.5 | 8.2 | – | 0.7 | – | 0.15 | 0.29 | 0.12 | 38000 | 48000 | 0.40 |
| MR83 | 3 | 8 | 2.5 | 3 | 9.2 | – | 0.6 | – | 0.15 | 0.29 | 0.12 | 38000 | 48000 | 0.52 |
| 619/3(693) | 3 | 8 | 3 | 4 | 9.5 | 9.5 | 0.7 | 0.9 | 0.15 | 0.44 | 0.15 | 38000 | 48000 | 0.80 |
| 639/3 | 3 | 8 | 4 | 4 | – | – | – | – | 0.15 | 0.44 | 0.15 | 38000 | 48000 | 0.90 |
| MR93 | 3 | 9 | 2.5 | 4 | 10.2 | 10.6 | 0.6 | 0.8 | 0.15 | 0.44 | 0.15 | 38000 | 48000 | 0.71 |
| 603 | 3 | 9 | 3 | 5 | 10.5 | 10.5 | 0.7 | 1.0 | 0.15 | 0.65 | 0.22 | 38000 | 48000 | 1.50 |
| 623 | 3 | 10 | 4 | 4 | 11.5 | 11.5 | 1.0 | 1.0 | 0.15 | 0.65 | 0.22 | 38000 | 48000 | 2.00 |
| 633 | 3 | 13 | 5 | 5 | 15 | – | 1 | – | 0.15 | 0.85 | 0.40 | 38000 | 48000 | 3.00 |
| MR74(674) | 4 | 7 | 2 | 2.5 | 8.2 | 8.2 | 0.6 | 0.6 | 0.1 | 0.25 | 0.10 | 38000 | 48000 | 0.28 |
| MR84 | 4 | 8 | 2 | 3 | 9.2 | 9.2 | 0.6 | 0.6 | 0.1 | 0.28 | 0.10 | 38000 | 48000 | 0.38 |
| 618/4(684) | 4 | 9 | 2.5 | 4 | 10.3 | 10.3 | 0.6 | 1.0 | 0.15 | 0.65 | 0.22 | 38000 | 48000 | 0.65 |
| 628/4 | 4 | 9 | 3.5 | 3.5 | 10.5 | – | 0.8 | – | 0.15 | 0.55 | 0.18 | 38000 | 48000 | 0.80 |
| MR104 | 4 | 10 | 3 | 4 | 11.2 | 11.6 | 0.6 | 0.8 | 0.15 | 0.65 | 0.22 | 38000 | 48000 | 1.00 |
| 619/4(694) | 4 | 11 | 4 | 4 | 12.5 | 12.5 | 1 | 1 | 0.15 | 0.95 | 0.35 | 36000 | 48000 | 2.00 |
| 639/4 | 4 | 11 | 5 | 5 | – | – | – | – | 0.15 | 0.95 | 0.35 | 38000 | 48000 | 2.30 |
| 604 | 4 | 12 | 4 | 4 | 13.5 | 13.5 | 1 | 1 | 0.2 | 0.95 | 0.35 | 38000 | 48000 | 2.60 |
| 624 | 4 | 13 | 5 | 5 | 15 | 15 | 1 | 1 | 0.2 | 1.15 | 0.40 | 36000 | 45000 | 3.00 |
| 634 | 4 | 16 | 5 | 5 | 18 | 18 | 1 | 1 | 0.3 | 1.88 | 0.68 | 32000 | 40000 | 5.00 |
| MR85(675) | 5 | 8 | 2 | 2.5 | 9.2 | 9.2 | 0.6 | 0.6 | 0.08 | 0.27 | 0.13 | 38000 | 48000 | 0.32 |
| MR95 | 5 | 9 | 2.5 | 3 | 10.2 | 10.2 | 0.6 | 0.6 | 0.1 | 0.49 | 0.20 | 38000 | 48000 | 0.55 |
| MR105 | 5 | 10 | 3 | 4 | 11.2 | 11.6 | 0.6 | 0.8 | 0.1 | 0.51 | 0.24 | 38000 | 48000 | 0.88 |
| 618/5(685) | 5 | 11 | 3 | 5 | 12.5 | 12.5 | 0.8 | 1 | 0.2 | 0.54 | 0.25 | 36000 | 45000 | 1.20 |
| 628/5 | 5 | 11 | 4 | 4 | 12.5 | – | 1 | – | 0.15 | 0.54 | 0.25 | 36000 | 45000 | 1.30 |
| 619/5(695) | 5 | 13 | 4 | 4 | 15 | 15 | 1 | 1 | 0.2 | 1.08 | 0.42 | 34000 | 43000 | 2.50 |
| 639/5 | 5 | 13 | 6 | 6 | – | – | – | – | 0.2 | 1.15 | 0.45 | 34000 | 43000 | 3.00 |
| 605 | 5 | 14 | 5 | 5 | 16 | 16 | 1 | 1 | 0.2 | 1.05 | 0.50 | 30000 | 38000 | 4.50 |
| 625 | 5 | 16 | 5 | 5 | 18 | 18 | 1 | 1 | 0.3 | 1.88 | 0.68 | 32000 | 40000 | 4.00 |
| 635 | 5 | 19 | 6 | 6 | 22 | 22 | 1.5 | 1.5 | 0.3 | 2.80 | 1.02 | 28000 | 36000 | 8.00 |
| MR106(676) | 6 | 10 | 2.5 | 3 | 11.2 | 11.2 | 0.6 | 0.6 | 0.1 | 0.54 | 0.25 | 34000 | 43000 | 0.65 |
| MR126 | 6 | 12 | 3 | 4 | 13.2 | 13.6 | 0.6 | 0.8 | 0.15 | 0.83 | 0.36 | 34000 | 43000 | 1.30 |
| 618/6(686) | 6 | 13 | 3.5 | 5 | 15 | 15 | 1 | 1.1 | 0.2 | 0.83 | 0.38 | 34000 | 43000 | 1.60 |
| 628/6 | 6 | 13 | 5 | 5 | – | – | – | – | 0.15 | 1.08 | 0.42 | 34000 | 43000 | 2.10 |
| 619/6(696) | 6 | 15 | 5 | 5 | 17 | 17 | 1.2 | 1.2 | 0.2 | 1.48 | 0.60 | 32000 | 40000 | 4.50 |
| 639/6 | 6 | 15 | 7 | 7 | – | – | – | – | 0.2 | 1.60 | 0.65 | 32000 | 40000 | 6.50 |
| 606 | 6 | 17 | 6 | 6 | 19 | 19 | 1.2 | 1.2 | 0.3 | 1.95 | 0.72 | 30000 | 38000 | 6.00 |
| 626 | 6 | 19 | 6 | 6 | 22 | 22 | 1.5 | 1.5 | 0.3 | 2.80 | 1.05 | 28000 | 36000 | 8.00 |
| 636 | 6 | 22 | 7 | 7 | – | – | – | – | 0.3 | 3.30 | 1.30 | 25000 | 33000 | 10.00 |
| MR117(677) | 7 | 11 | 2.5 | 3 | 12.2 | 12.2 | 0.6 | 0.6 | 0.1 | 0.45 | 0.20 | 32000 | 40000 | 0.67 |
| MR137 | 7 | 13 | 3 | 4 | 14.2 | 14.6 | 0.6 | 0.8 | 0.15 | 0.88 | 0.39 | 32000 | 40000 | 1.40 |
| 618/7(687) | 7 | 14 | 3.5 | 5 | 16 | 16 | 1 | 1.1 | 0.15 | 0.90 | 0.45 | 32000 | 40000 | 2.10 |
| 628/7 | 7 | 14 | 5 | 5 | 11 | – | 1 | – | 0.15 | 1.18 | 0.50 | 32000 | 40000 | 2.40 |
| 619/7(697) | 7 | 17 | 5 | 5 | 19 | 19 | 1.2 | 1.2 | 0.3 | 2.02 | 0.80 | 30000 | 38000 | 5.70 |
| 629/7 | 7 | 17 | 6 | 6 | – | – | – | – | 0.3 | 1.74 | 0.79 | 30000 | 38000 | 7.20 |
| 607 | 7 | 19 | 6 | 6 | 22 | 22 | 1.5 | 1.5 | 0.3 | 2.88 | 1.08 | 28000 | 36000 | 7.00 |
| 627 | 7 | 22 | 7 | 7 | 25 | 25 | 1.5 | 1.5 | 0.3 | 3.28 | 1.35 | 26000 | 34000 | 1.40 |
| 637 | 7 | 26 | 9 | 9 | 29 | – | 2 | – | 0.3 | 3.60 | 1.50 | 26000 | 34000 | 3.40 |
| MR128(678) | 8 | 12 | 2.5 | 3.5 | 13.2 | 13.6 | 0.6 | 0.8 | 0.1 | 0.50 | 0.25 | 28000 | 36000 | 0.75 |
| MR148 | 8 | 14 | 3.5 | 4 | 15.6 | 15.6 | 0.8 | 0.8 | 0.15 | 0.88 | 0.39 | 28000 | 36000 | 1.80 |
| 618/8(688) | 8 | 16 | 4 | 5 | 18 | 18 | 1 | 1.1 | 0.3 | 1.37 | 0.70 | 30000 | 38000 | 3.10 |
| 628/8 | 8 | 16 | 5 | 5 | – | – | – | – | 0.2 | 1.32 | 0.65 | 30000 | 38000 | 4.00 |
| 619/8(698) | 8 | 19 | 6 | 6 | 22 | 22 | 1.5 | 1.5 | 0.3 | 2.25 | 0.92 | 28000 | 36000 | 8.50 |
| 629/8 | 8 | 19 | 7 | 7 | – | – | – | – | 0.3 | 2.35 | 0.92 | 28000 | 36000 | 10.00 |
| 608 | 8 | 22 | 7 | 7 | 25 | 25 | 1.5 | 1.5 | 0.3 | 3.32 | 1.38 | 26000 | 34000 | 15.00 |
| 628 | 8 | 24 | 8 | 8 | – | – | – | – | 0.3 | 3.35 | 1.40 | 24000 | 32000 | 16.00 |
| 638 | 8 | 28 | 9 | 9 | 30.25 | – | 2.25 | – | 0.3 | 3.95 | 1.60 | 24000 | 30000 | 30.00 |
| 679 | 9 | 14 | 3 | 4.5 | – | – | – | – | 0.1 | 0.92 | 0.47 | 36000 | 42000 | 0.98 |
| 618/9(689) | 9 | 17 | 4 | 5 | 19 | 19 | 1 | 1.1 | 0.2 | 1.37 | 0.72 | 28000 | 36000 | 3.30 |
| 628/9 | 9 | 17 | 5 | 5 | – | – | – | – | 0.2 | 1.60 | 0.72 | 28000 | 36000 | 4.20 |
| 619/9(699) | 9 | 20 | 6 | 6 | 23 | 23 | 1.5 | 1.5 | 0.3 | 2.48 | 1.08 | 27000 | 34000 | 9.20 |
| 629/9 | 9 | 20 | 7 | 7 | – | – | – | – | 0.3 | 2.50 | 1.08 | 27000 | 34000 | 10.00 |
| 609 | 9 | 24 | 7 | 7 | – | – | – | – | 0.3 | 3.35 | 1.40 | 22000 | 30000 | 16.00 |
| 629 | 9 | 26 | 8 | 8 | – | – | – | – | 0.3 | 4.45 | 1.95 | 22000 | 30000 | 19.00 |
| 639 | 9 | 30 | 10 | 10 | – | – | – | – | 0.3 | 4.95 | 2.30 | 22000 | 30000 | 35.00 |
Conclusion
The 608 bearing is a highly versatile and reliable option for various applications, from skateboards to industrial machinery. Understanding its dimensions, materials, and ideal uses is crucial for selecting the right bearing for your needs. By selecting high-quality bearings, such as the ones offered by BYWB Bearing, you can ensure long-lasting performance, whether you’re cruising down the street or managing complex machinery operations.
When it comes to skateboarding, 608 bearings are the gold standard, providing the smooth performance and durability riders require for both casual use and professional competition. Whether you need open, shielded, or sealed bearings, understanding their differences will help you make the right choice.
