How to Select Deep Groove Ball Bearings: Size, Seal & Application Matching

• Measure the shaft diameter (inner diameter, ID): This is the most critical dimension. For example:
  • Small motors/DIY projects: 6200 bearing (10mm ID) or 6300-2RS (10mm ID).
  • Automotive components: 6004 bearing (20mm ID) or 6304-2RS (20mm ID).
  • Industrial machinery: 6306-2RS (30mm ID) for motors and conveyors.
• Confirm outer diameter (OD) and width: Ensure the bearing fits the housing—our product pages list full dimensions (e.g., 6304-2RS has 52mm OD and 15mm width).

• Open bearings (no seal): Suitable for clean, dry environments (e.g., precision instruments). Example: 6200 open bearing.
• Shielded bearings (Z/ZZ): Protect against dust but not moisture—ideal for indoor machinery. Example: 6905ZZ deep groove bearing.
• Sealed bearings (2RS): Double-sided rubber seals for dust and moisture resistance—best for outdoor or harsh environments. Example: 6304-2RS (most popular for industrial use).

• Speed: High-speed applications (e.g., motors, 3000+ rpm) require bearings with low friction. Choose sealed models with high-quality grease (our 6306-2RS is rated for 8000 rpm).
• Load: Light load (small fans, toys): 6200 series. Medium load (motors, pumps): 6300 series. Heavy load (industrial machinery): Upgrade to 6400 series (contact us for custom models).
• Temperature: Standard GCr15 steel bearings work for -40°C to 120°C. For extreme temperatures, ask about our heat-resistant variants.

• Threaded steel balls: For precision applications (e.g., instruments, electronics), choose our M3-M10 threaded steel balls (e.g., M8 threaded high carbon steel balls) for enhanced precision.
• Custom sizes: If standard dimensions don’t fit, KESILE offers customized deep groove ball bearings—contact our engineers to discuss your needs.

Selection Hack: Use our “Application-to-Bearing" chart (available on request) to quickly match your equipment to the right model. For example:

• Small machinery (e.g., printers): 6200 bearing (10x30x9mm).
• Motors (0.5-10HP): 6304-2RS (20x52x15mm).
• Automotive parts (e.g., alternators): 6004 deep groove bearing (20x42x12mm).