Bearing type (e.g., "6" is a deep groove ball bearing).

If the code is unreadable, use a vernier caliper to measure the Inner Diameter (ID) , Outer Diameter (OD) , and Width (W) in millimeters. 3. Choose Reputable Online Suppliers Bearing Selection Guide | How to Choose a Bearing

Look for specialized heat-resistant materials and lubricants. 2. Measure or Decode Existing Bearings

Robustness/series (e.g., extra light, light, or medium).

Before browsing, determine these critical factors to ensure you select a bearing that won't fail prematurely:

The bore size (Inner Diameter). For digits above 03, multiply by 5 to get the size in mm (e.g., "05" = 25mm).

Forces acting parallel to the shaft. Choose thrust ball bearings for exclusively axial forces.