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    AI Overview
    6904-2RS Slim/Thin Section Ball Bearing 20x37x9 Sealed ...
    A 6904 non-standard thin ball bearing, often found in specialized applications like steering machines, typically features a modified inner diameter while maintaining a 6904 series 20mm bore, 37mm OD, and 9mm width (e.g., 21.5×37×9mm), usually with 2RS rubber seals. These bearings offer high speed, low friction, and are utilized in compact, specialized machinery. 
    Key Characteristics and Variations: 
    • Standard 6904 Dimensions: 20mm bore (
      dd
      𝑑
      ), 37mm outside diameter (
      Dcap D
      𝐷
      ), 9mm width (
      Bcap B
      𝐵
      ).
    • Non-Standard Example (6904/21.5-2RS): 21.5mm inner diameter
      ×cross
      ×
       37mm outer diameter
      ×cross
      ×
       9mm width, often with rubber seals, designed for specific shaft requirements.
    • Structure: Single-row deep groove radial ball bearing with high-speed, high-dynamic load capacity.
    • Material: Usually constructed from chrome steel (52100) for durability.
    • Types: Available in open (no seals/shields), shielded (ZZ), and sealed (2RS) variants. 
    Common Applications: 
    • Textile machines and embroidery machinery.
    • Steering machine columns and non-standard custom projects.
    • High-speed, low-vibration environments where radial space is limited. 
    Alternatives & Suffixes: 
    • 2RS1/2RS: Rubber seals on both sides for protection against contamination.
    • ZZ: Metal shields on both sides.
    • 61904: Often used interchangeably for this thin-section series. 
    When looking for a "6904 Non-standard thin ball bearing," it is crucial to verify the specific inner diameter, as it may be altered from the standard 20mm, such as a 21.5mm bore specialized for certain steering shafts. 
    • 4PCS Steering Machine Non-standard Bearing 6904/21.5-2RS Size ...
      It's not just another generic component—it's a well-engineered solution for real-world challenges. Whether you're repairing a vint...
      AliExpress
    • 6904VV - NSK Thin Section - 20x37x9mm - Quality Bearings Online
      Description. This 6904VV bearing is a Sealed Thin Section Deep Groove Radial Ball Bearing with a non-contact rubber seal, this bea...
      Quality Bearings Online
    • SKF 6904 2RS1 Rubber Seals Ball Bearing NTN, NSK FAG 61904.
      Item description from the seller This 6904-2RS1 61904 -2RS bearing is a Sealed Thin Section Deep Groove Radial Ball Bearing with a...
      eBay
    • Deep Groove 6904 Ball Bearings 20mm X 37mm X 9mm
      The 6904 20 mm Ball Bearing Inner Dimension 20mm X Outer Dimension 37mm X Width 9mm is an open style ball bearing designed for hig...
      Misumi USA
    • Computer Embroidery Machine Parts Non-Standard 6904 (1 ...
      Buy HFFFXRCY Computer Embroidery Machine Parts Non-Standard 6904 (1 Piece) Ball Bearing 6904-sleeve Integral Bearing: Thin-Section...
      Amazon.com
    • 6904 Ball Bearing | 6904 Bearing - 20x37x9 – USA ROLLER CHAIN
      6904 Ball Bearing Dimensions * Bearing Size: 6904. * Dimension (d): 20mm. * Dimension (D): 37mm. * Dimension (B): 9mm. * Dynamic L...
      usa roller chain
    • 6904 ZZ Ball Bearing ABEC-1 20*37*9 mm 5PCS Metric Thin ...
      Description Model: 6904ZZ Inner (d): 20mm Outer (D): 37mm Width (B):9 mm Material: 52100 Chrome Steel Seal: Shield Qty: 5 Pcs Bran...
      eBay
    • Deep Groove Ball Bearing 6904 - VXB Bearings
      Built from chrome steel for strength and longevity. ✓ Pack size: 1 bearing ✓ Type: Single-row deep groove ball bearing ✓ Design: O...
      VXB Bearings
    • 6904 - Motion
      Specifications. This Radial & Deep Groove Ball Bearing includes 20 mm bore diameter, open closure, 37 mm outside diameter, and 9 m...
      Motion Industries
    • Part number 6904-SKF - Deep groove ball bearing - 123Bearing
      The Deep Groove Ball Bearing, known as 6904-SKF SKF, has an inner diameter of 20 mm, an outer diameter of 37 mm and a thickness of...
      www.123bearing.com
    • 6904 - SKF Thin Section Bearing - 20x37x9
      Compact Design The thin section profile of the 6904 bearing makes it ideal for applications with limited radial space. Its compact...
      Quality Bearings Online
    • 6904 | Deep Groove Ball Bearing - Single Row | NSK - Misumi USA
      These versatile bearings are the most common type of bearings and serve a wide variety of applications including agricultural mach...
      Misumi USA
    • Internal aperture 3mm 4mm 5mm 6mm non-standard U-V groove roller Pulley Wheel Bearings Guide Track Rlooer Bearing
      One thing to keep in mind: because these are non-standard bearings, compatibility with off-the-shelf components may require carefu...
      AliExpress
    • 4PCS Steering Machine Non-standard Bearing 6904/21.5-2RS Size ...
      It's not just another generic component—it's a well-engineered solution for real-world challenges. Whether you're repairing a vint...
      AliExpress
    • 6904VV - NSK Thin Section - 20x37x9mm - Quality Bearings Online
      Description. This 6904VV bearing is a Sealed Thin Section Deep Groove Radial Ball Bearing with a non-contact rubber seal, this bea...
      Quality Bearings Online
    • SKF 6904 2RS1 Rubber Seals Ball Bearing NTN, NSK FAG 61904.
      Item description from the seller This 6904-2RS1 61904 -2RS bearing is a Sealed Thin Section Deep Groove Radial Ball Bearing with a...
      eBay
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    My Ad Center

    Computer Embroidery Machine Parts Non-Standard 6904 ...


    Amazon.com
    https://www.amazon.com › HFFFXRCY-Computer-Em...
    Amazon.com
    https://www.amazon.com › HFFFXRCY-Computer-Em...
    Buy HFFFXRCY Computer Embroidery Machine Parts Non-Standard 6904 (1 Piece) Ball Bearing 6904-sleeve Integral Bearing: Thin-Section Ball Bearings - Amazon.com ✓
    6904 Non-standard thin ball bearing from www.amazon.com
    30-day returns

    Thin Section Ball Bearing - Single Row 6904HZZ


    Misumi USA
    https://us.misumi-ec.com › ... › Ball Bearings
    Misumi USA
    https://us.misumi-ec.com › ... › Ball Bearings
    An ultra-thin type bearing that is compact and lightweight and suitable for thin-walled designs.[Features]-A wide variety of thin-walled products with outer ...Read more
    6904 Non-standard thin ball bearing from us.misumi-ec.com

    6904 - SKF Thin Section Bearing - 20x37x9


    Quality Bearings Online
    https://www.qualitybearingsonline.com › Brands
    Quality Bearings Online
    https://www.qualitybearingsonline.com › Brands
    The SKF 6904 Thin Section Bearing is a deep groove ball bearing designed for applications where space and weight are critical factors.Read more
    6904 Non-standard thin ball bearing from www.qualitybearingsonline.com
    $38.86$41with code
    CM503QRN25 (Copy)CM503QRN25
    )
    Copied(
     · In stock · 5.0 (1) · Free delivery over $500 · 14-day returns

    6904 ZZ Ball Bearing ABEC-1 20*37*9 mm 5PCS Metric ...


    eBay
    https://www.ebay.com › itm
    eBay
    https://www.ebay.com › itm
    Description Model: 6904ZZ Inner (d): 20mm Outer (D): 37mm Width (B):9 mm Material: 52100 Chrome Steel Seal: Shield Qty: 5 Pcs Brand Unbranded MPN Does Not Apply ...Read more
    $10.88$13 · In stock · Free delivery · Free 60-day returns

    OEM/ODM 6904 Non-standard thin ball bearing ... - RMO Bearings


    rmbearing.com
    https://www.rmbearing.com › 6904-non-standard-thin-b...
    rmbearing.com
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    Looking for 6904 Non-standard thin ball bearing? RMO will be your right choice! We have customers all over the world and are trustworthy!

    Deep Groove Ball Bearing 6904


    VXB Bearings
    https://vxb.com › 6904-bearing-ball-bearing-6904
    VXB Bearings
    https://vxb.com › 6904-bearing-ball-bearing-6904
    Built from chrome steel for strength and longevity. ✓ Pack size: 1 bearing ✓ Type: Single-row deep groove ball bearing ✓ Design: Open (no seals or shields)Read more

    6904ZZ Bearing ( 10 PCS ) 20*37*9 mm Thin Section 6904 ZZ ...


    AliExpress
    https://www.aliexpress.com › item
    AliExpress
    https://www.aliexpress.com › item
    Thin Section Ball Bearings were developed for applications where space limitations are of the utmost importance. As the name implies, the difference between ...

    69042RS Thin Section Bearings: Metric Series Ball Bearing


    AST Bearings
    https://www.astbearings.com › catalog › 6904-2RS
    AST Bearings
    https://www.astbearings.com › catalog › 6904-2RS
    AST Bearings is a premier supplier of 69042RS Thin Section Bearings: Metric Series Ball Bearing for a range of applications. Contact us today!
    6904 Non-standard thin ball bearing from www.astbearings.com
    Missing: Non- ‎| Show results with: Non-
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    6904 Ball Bearing | 6904 Bearing - 20x37x9


    usa roller chain
    https://usarollerchain.com › products › 2278-brg-6904
    usa roller chain
    https://usarollerchain.com › products › 2278-brg-6904
    This 6904 ball bearing is a high-performance precision bearing made to ABEC 3 standards from AXIS. 6904 bearing dimensions are 20x37x9 and it is an open ...
    6904 Non-standard thin ball bearing from usarollerchain.com
    Missing: thin ‎| Show results with: thin
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      KOYO 6904-2RS Rubber Sealed Thin Section Deep Groove Ball Bearing 20x37x9mm
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    F6904 flanged thin section bearing 20x37x9mm (20mm x ...


    SMB Bearings
    https://www.smbbearings.com › bearingpdfs › F...
    SMB Bearings
    https://www.smbbearings.com › bearingpdfs › F...
    PDF
    These bearings comply with EU ROHS and REACH regulations. Radial Ball Bearing. (for illustration only). 22,000 rpm. SMB Bearings take no responsibilty for any ...Read more
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