Comprehensive Guide to the Size of a 608 Bearing

Understanding the 608 Bearing Size

The size of a 608 bearing is a crucial aspect to consider for numerous applications. Its compact dimensions and versatility make it one of the most widely used bearings in various industries.

Metric Size

The metric size of a 608 bearing is:

SAE Size

The Society of Automotive Engineers (SAE) size of a 608 bearing is:

Applications of 608 Bearings

Due to their small size, high load capacity, and low friction, 608 bearings find applications in a wide range of industries and products, including:

• Inline skates and rollerblades
• Skateboards and longboards
• Scooters and bicycles
• Electric motors and power tools
• Small appliances and machinery
• Medical and dental equipment

Common Mistakes to Avoid

Although 608 bearings are relatively easy to handle and maintain, some common mistakes should be avoided:

• Over-tightening: Excessive tightening can lead to bearing damage or premature failure.
• Under-lubrication: Insufficient lubrication can cause friction and heat buildup, reducing bearing life.
• Incorrect installation: Improper mounting or alignment can affect bearing performance and shorten its lifespan.

FAQs

1. What are the different types of 608 bearings?

Single-row: The most common type, with a single row of balls.

Double-row: Contains two rows of balls, providing higher load capacity.

Radial: Designed to support radial loads (perpendicular to the shaft).

2. How to identify a 608 bearing?

Look for the following markings on the bearing:

• 608: Indicates the size
• RS or ZZ: Denotes the seal type (e.g., rubber seal or metal shield)
• C3, C4, etc.: Indicates the internal clearance (play) of the bearing

3. How to choose the right 608 bearing for an application?

Consider the following factors:

• Load: Determine the maximum radial and axial loads the bearing will encounter.
• Speed: The bearing's maximum operating speed should be higher than the application's speed.
• Environment: Consider factors such as temperature, moisture, and contamination.
• Lubrication: Select the appropriate lubricant and lubrication method for the application.

4. How to extend the life of a 608 bearing?

• Use the bearing in accordance with its specifications and limits.
• Lubricate the bearing regularly with the manufacturer's recommended lubricant.
• Seal the bearing from dust and moisture if necessary.
• Store the bearing in a dry, clean environment.

5. Where can I buy 608 bearings?

608 bearings are available from various retailers, including online stores such as Amazon and eBay, as well as specialized bearing suppliers.

Stories

Story 1: The Overzealous Skater

A young skater, eager to show off his new tricks, over-tightened the 608 bearings in his inline skates. After a few speedy runs, the bearings started to overheat and make a grinding noise. The skater realized his mistake and had to replace the damaged bearings.

Lesson: Avoid over-tightening 608 bearings to prevent premature failure.

Story 2: The Water-Damaged Bearings

A cyclist rode through a heavy downpour, forgetting to protect his bike's 608 bearings from the rain. When he removed the wheels to clean them, he discovered that the bearings had become rusted and seized up. He had to replace the bearings and invest in waterproof seals to avoid the same issue in the future.

Lesson: Lubricate and seal 608 bearings to prevent damage from moisture.

Story 3: The Mismatched Pair

A beginner skateboarder purchased a set of 608 bearings, but accidentally grabbed two bearings with different internal clearances. After assembling his skateboard, he noticed that one wheel spun more freely than the other. The mismatched clearances caused uneven wear and reduced the skateboard's overall performance.

Lesson: Ensure that all 608 bearings in an application have the same specifications.

Tables

Table 1: Load Ratings of 608 Bearings

Table 2: Speed Limits of 608 Bearings

Table 3: Internal Clearances of 608 Bearings