How to size a bearing
Sizing a bearing involves determining its dimensions, including inner diameter, outer diameter, and width. Here’s how to size a bearing:
1. Outer Diameter (OD): Measure the diameter of the outer edge of the bearing. Use a caliper or ruler to measure the distance across the outer edge of the bearing. The standard outer diameter for skateboard bearings is typically 22mm.
2. Inner Diameter (ID): Measure the diameter of the central hole in the bearing. This is typically done using a caliper or ruler. Place the measuring tool inside the central hole and measure the distance across. The standard inner diameter for skateboard bearings is typically 8mm.
3. Record Measurements: Note down the measurements for the inner diameter, outer diameter, and width. Record the measurements in millimeters (mm) for accuracy.
4. Width: Measure the thickness of the bearing from one side to the other. Place the measuring tool across the width of the bearing, ensuring it is parallel to each other. Measure the distance between the two sides. The standard width for skateboard bearings is typically 7mm.
5. Verify Compatibility: Before purchasing replacement bearings, verify that the measured dimensions are compatible with your skateboard’s wheels and axles. Ensure that the inner diameter matches the size of your skateboard axles, and the outer diameter fits within the wheel hubs without any issues.
6. Compare with Standard Sizes: Compare the recorded measurements with standard skateboard bearing sizes. The most common standard size for skateboard bearings is 8mm (inner diameter) x 22mm (outer diameter) x 7mm (width).
7. Consider Specific Requirements:
– Depending on your riding style and preferences, you may have specific requirements for your bearings. For example, if you’re a downhill rider, you may prioritize bearings with higher precision and durability.
– Consider factors such as ABEC rating, bearing material, and sealing options to ensure that the bearings meet your specific needs.
8. Seek Expert Advice if Needed:
– If you’re unsure about the sizing process or compatibility, don’t hesitate to seek advice from experienced skateboarders or professionals.
– Local skate shops or online forums can provide valuable insights and guidance to help you accurately size bearings for your skateboard.
9. Maintain Accurate Records:
– Keep a record of the bearing sizes and specifications for future reference. This will be helpful when purchasing replacement bearings or if you need to reference the measurements later on.
– Accurate records ensure that you can quickly and confidently identify compatible bearings for your skateboard in the future.
10. Install and Maintain Bearings Properly:
– Once you have selected and purchased the appropriate bearings, ensure they are installed correctly on your skateboard. Follow the manufacturer’s instructions for installation carefully.
– Regularly maintain your bearings by cleaning and lubricating them as needed to prolong their lifespan and maintain optimal performance.
11. Evaluate Performance Characteristics:
– Beyond size, consider the performance characteristics of the bearings. Bearings with higher ABEC ratings typically offer smoother and more precise rotation, but they may come at a higher cost.
– Evaluate factors such as speed, durability, and resistance to debris to choose bearings that best suit your skating style and environment.
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By following these additional steps and considerations, you can accurately size skateboard bearings and ensure compatibility with your skateboard. Properly sized and maintained bearings are essential for optimal performance and a smooth riding experience.