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Characteristics of Deep Groove Ball Bearings

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  1. Determine dimensional parameters (basic designation) First, confirm the three basic dimensions of the bearing according to the mounting position: bore diameter (d), outer diameter (D) and width (B).
    Limited mounting space: 68 and 69 (thin-section) series are preferred.
    General-purpose applications: 62 and 63 series are preferred.
    Bore calculation example: For a 25mm bore, the last two digits of the designation are 05 (25÷5).
  2. Evaluate load and speed Radial load: Deep groove ball bearings are mainly designed for radial loads. Select the 63 series for heavy radial loads, and 60 or 62 series for light radial loads.
    Axial load: They can withstand a certain amount of bidirectional axial load. If the axial load is excessive (more than 20% of the radial load), consider increasing the bearing size or switching to angular contact ball bearings. Speed: Deep groove ball bearings feature one of the highest limiting speeds. For ultra-high speed applications, choose open type or non-contact seals (RZ/VV) with oil lubrication.
  3. Select sealing type (suffix code).
    Select based on the cleanliness of the working environment and maintenance frequency:
    Open type: For oil lubrication conditions, minimum friction.
    ZZ (metal shielded): Blocks large dust particles, low friction, not water-resistant.
    2RS (rubber sealed): Best sealing performance, dustproof and waterproof, with slightly higher friction and lower speed rating.
  4. Determine internal clearance and precision. grade Clearance: Standard clearance by default (no marking required). If the shaft will heat up and cause inner ring expansion during operation, C3 or C4 increased clearance must be adopted.
    Precision: P0 or P6 for ordinary motors and transmission systems; P5 or P4 for high-precision machine tools or ultra-smooth operation.
  5. Recommendations for common working. conditions General motors: 6200-2RS / C3 (low noise, high reliability).
    Home appliances / fans: 6000-ZZ / P6 (quiet, low starting friction).
    High-speed spindles: 6200-P5 / VV (high precision, low temperature rise).