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    An AI Overview is not available for this searchCan't generate an AI overview right now. Try again later.
    AI Overview
    678 - NBK Bearing
    The 678 miniature ball bearing is an ultra-low friction, high-precision, deep-groove bearing designed for high-speed, quiet operation in compact spaces, with standard dimensions of 8 mm ID, 12 mm OD, and 2.5 mm or 3.5 mm width. Optimized for minimal rotational friction, 678-ZZ (shielded) variants are common for consumer electronics and precision machinery. 
    Key Features & Specifications 
    • Dimensions: Typically
      8
      mm
       Bore
      ×cross
      ×
      12
      mm
       OD, with widths of
      2.5
      mm
       (open) or
      3.5
      mm
       (shielded).
    • Low Friction: Engineered for low-torque, high-speed applications (up to 40,000+ RPM).
    • Low Noise/Vibration: Optimized for smooth, quiet, and precise motion.
    • Types: Available as Open, ZZ (Double Shielded), and 2RS (Sealed) to prevent contamination while maintaining low torque.
    • Material: Often high-grade steel or 440C stainless steel for durability, with some versions using ceramic balls. 
    Common Applications 
    • High-speed consumer electronics.
    • Precision medical instruments.
    • Small power motors and tools.
    • High-end fishing reels or drones. 
    Typical Pricing (2026) 
    • MISUMI-SB678ZZ: Approximately
      $
      8.78
      .
    • MISUMI-SFL678ZZ (Flanged): Approximately
      $
      13.82
      .
    • Consolidated 678-ZZ: Ranging from
      $
      60
       to
      $
      75
      .       
    The 678 bearing is frequently found in stock for immediate purchase from providers like MiSUMi USA, Zoro, and MRO Supply. 
    Show more
    Popular products
    • MISUMI-SB678ZZ-Deep Groove Ball Bearing - Small, Double Shielded, 440C Stainless Steel | Misumi.
      MISUMI-SB678ZZ-Deep Groove Ball Bearing - Small, Double Shielded, 440C Stainless Steel | Misumi
      $8.78
      MiSUMi USA
      MISUMI-SB678ZZ-Deep Groove Ball Bearing - Small, Double Shielded, 440C Stainless Steel | Misumi
      $8.78
      MiSUMi USA
    • MISUMI-SFL678ZZ-Deep Groove Ball Bearing - Small, Flanged, Double Shielded, 440C Stainless Steel | Misumi.
      MISUMI-SFL678ZZ-Deep Groove Ball Bearing - Small, Flanged, Double Shielded, 440C Stainless Steel | Misumi
      $13.82
      MiSUMi USA
      MISUMI-SFL678ZZ-Deep Groove Ball Bearing - Small, Flanged, Double Shielded, 440C Stainless Steel | Misumi
      $13.82
      MiSUMi USA
    • DEO678CS12 ATV Ball Bearing 30x50x20mm.
      DEO678CS12 ATV Ball Bearing 30x50x20mm
      $39.99
      VXB.com Bearings
      Free delivery
      DEO678CS12 ATV Ball Bearing 30x50x20mm
      $39.99
      VXB.com Bearings
      Free delivery
    • Consolidated Bearings SSF-678-ZZ DEEP GROOVE BALL BEARING FLANGED STAINLESS SHIELDED MROSupply.
      Consolidated Bearings SSF-678-ZZ DEEP GROOVE BALL BEARING FLANGED STAINLESS SHIELDED MROSupply
      $20.09
      MRO Supply
      Free delivery
      Consolidated Bearings SSF-678-ZZ DEEP GROOVE BALL BEARING FLANGED STAINLESS SHIELDED MROSupply
      $20.09
      MRO Supply
      Free delivery
    • Amcan DEO678 CS12 Ball Bearing.
      Amcan DEO678 CS12 Ball Bearing
      $33.12
      Locate Ball Bearings
      Amcan DEO678 CS12 Ball Bearing
      $33.12
      Locate Ball Bearings
    • Consolidated Bearings SS678 DEEP GROOVE BALL BEARING STAINLESS STEEL MINIATURE MROSupply.
      Consolidated Bearings SS678 DEEP GROOVE BALL BEARING STAINLESS STEEL MINIATURE MROSupply
      $69.33
      MRO Supply
      Free delivery
      Consolidated Bearings SS678 DEEP GROOVE BALL BEARING STAINLESS STEEL MINIATURE MROSupply
      $69.33
      MRO Supply
      Free delivery
    • Deep Groove Ball Bearings Premium Grade (ZV1 Noise Level) Full Range 678-ZZ Pack 100.
      Deep Groove Ball Bearings Premium Grade (ZV1 Noise Level) Full Range 678-ZZ Pack 100
      $33.03
      WKOOA
      Deep Groove Ball Bearings Premium Grade (ZV1 Noise Level) Full Range 678-ZZ Pack 100
      $33.03
      WKOOA
    • Consolidated Bearings SS678-ZZ DEEP GROOVE BALL BEARING STAINLESS STEEL SHIELDED MROSupply.
      Consolidated Bearings SS678-ZZ DEEP GROOVE BALL BEARING STAINLESS STEEL SHIELDED MROSupply
      $72.83
      MRO Supply
      Free delivery
      Consolidated Bearings SS678-ZZ DEEP GROOVE BALL BEARING STAINLESS STEEL SHIELDED MROSupply
      $72.83
      MRO Supply
      Free delivery

    Web results

    678 Open Miniature Deep Groove Ball Bearing | Ultra-Low Torque ...


    welinkbearing.com
    https://www.welinkbearing.com › 67 Series
    welinkbearing.com
    https://www.welinkbearing.com › 67 Series
    The 678 Open is a high-precision, ultra-thin miniature ball bearing engineered for technical applications where minimizing rotational friction is the top ...

    Minature 678 Ball Bearings 8mm X 12mm X 2.5mm


    Misumi USA
    https://us.misumi-ec.com › ball-bearings › miniature › 6...
    Misumi USA
    https://us.misumi-ec.com › ball-bearings › miniature › 6...
    The 678 is a 8 mm Ball Bearing that can be used in many rotary and factory automation applications. The 678 Miniature Ball Bearings is an open style bearing.Read more
    Missing: Frictionless ‎| Show results with: Frictionless
    People also ask
    What are the best frictionless bearings?
    Ceramic bearings are a good option for low torque applications. The material has a low coefficient of friction so these bearings can be used without lubrication. As a result, ceramic ball bearings are well-known for providing low levels of resistance and low frictional torque.

    Low friction bearings | Types of bearing - SMB Bearings


    SMB Bearings
    https://www.smbbearings.com › low-friction-bearings
    SMB Bearings
    https://www.smbbearings.com › low-friction-bearings
    What size is a 678 bearing?
    The 678 Miniature Ball Bearings is an open style bearing. The 678 8 mm Ball Bearing Inner Dimension 8mm X Outer Dimension 12mm X Width 2.5mm is an open style ball bearing designed for high rotational speeds and high dynamic loads.

    Minature 678 Ball Bearings 8mm X 12mm X 2.5mm


    Misumi USA
    https://us.misumi-ec.com › ball-bearings › miniature › 6...
    Misumi USA
    https://us.misumi-ec.com › ball-bearings › miniature › 6...
    Which is better, RS or ZZ bearing?
    If moderate protection from debris is needed without frequent maintenance: Opt for ZZ bearings. Their metal shields offer protection while still allowing for smooth, efficient operation. If your application requires maximum protection from dust, moisture, or other contaminants: Go for 2RS bearings.Dec 19, 2024

    Comparing Open, ZZ, and 2RS Bearings: Which One Should You ...


    PGN Blog - PGN Bearings
    https://blog.pgnbearings.com › comparing-open-zz-and-...
    PGN Blog - PGN Bearings
    https://blog.pgnbearings.com › comparing-open-zz-and-...
    What are frictionless bearings?
    Frictionless bearings, as the name suggests, are specialized mechanical devices designed to reduce or eliminate friction between moving parts. Their primary goal is to allow smooth and unhindered motion, leading to improved performance and reduced wear and tear.Sep 26, 2023

    What is a Frictionless Bearing: Definition, Types and Applications


    Bearing News
    https://www.bearing-news.com › what-is-a-frictionless-be...
    Bearing News
    https://www.bearing-news.com › what-is-a-frictionless-be...

    Web results

    Consolidated Bearings 678-ZZ DEEP GROOVE BALL ...


    MROsupply.com
    https://www.mrosupply.com › bearings › 6557773_678-...
    MROsupply.com
    https://www.mrosupply.com › bearings › 6557773_678-...
    Low friction and are optimized for low noise and low vibration which enables high rotational speeds; Also available with one shield - suffix Z, No change in ...Read more
    $60.25 · In stock · 5.0 (1) · Free delivery · 90-day returns
    Missing: Frictionless ‎| Show results with: Frictionless

    NBK-678


    NBK Bearing
    https://nbkbearingusa.com › 67 Series
    NBK Bearing
    https://nbkbearingusa.com › 67 Series
    Single Row Deep Groove Ball Bearings are widely recognized as the predominant type of rolling bearing, featuring inner and outer ring raceway grooves that form ...Read more
    Missing: Frictionless ‎| Show results with: Frictionless

    Miniature Ball Bearings


    NSK Global
    https://www.nsk.com › nsk › catalogs › ctrgPdf
    NSK Global
    https://www.nsk.com › nsk › catalogs › ctrgPdf
    PDF
    The first half contains technical information about bearing life, load ratings, limiting speeds, accuracy, lubrication, etc. to facilitate selection of the most ...Read more
    41 pages
    Missing: Frictionless ‎| Show results with: Frictionless

    678-ZZ - Single Row Ball Bearings


    Bearing Distributors, Inc.
    https://www.bdiexpress.com › Categories › 678-ZZ
    Bearing Distributors, Inc.
    https://www.bdiexpress.com › Categories › 678-ZZ
    Single Row Ball Bearing; 8MM Bore; 12MM Outside Diameter; 3.5MM Outer Race Width; 2 Metal Shields; ABEC 1 | ISO P0; No Filling Slot; No Snap Ring; ...Read more
    $91.30 · Free delivery over $250
    Missing: Frictionless ‎| Show results with: Frictionless

    Deep Groove Ball Bearing 10pcs/lot MR128-2RS 678 ...


    Amazon.ca
    https://www.amazon.ca › Bearing-MR128-2RS-678-2R...
    Amazon.ca
    https://www.amazon.ca › Bearing-MR128-2RS-678-2R...
    Superb Performance : The meticulous hand-finishing and quality craftsmanship provide virtually frictionless, vibration-free and whisper-quiet spinning ...

    678-ZZ - Miniature ball bearings


    Tradebearings
    https://en.tradebearings.com › 678_ZZ-157333
    Tradebearings
    https://en.tradebearings.com › 678_ZZ-157333
    The 678-ZZ Miniature ball bearings adopts a High precision, small size, low friction design, with dimensions an inner diameter of 8 mm, an outer diameter of 12 ...Read more
    Missing: Frictionless ‎| Show results with: Frictionless

    678 Bearing Dimensions 8mm X 12mm X 2.5mm


    isk bearings
    https://iskbearing.com › product-details › 678
    isk bearings
    https://iskbearing.com › product-details › 678
    678 Miniature Ball Bearing Dimensions · Bearing Size: 678 · Bearing No. (NMB): L-1280 · Dimension (d): 8mm · Dimension (D): 12mm · Dimension (B): 2.5mm ...
    Missing: Frictionless ‎| Show results with: Frictionless

    Japan NSK Bearing Deep Grove Ball Bearing 673 674 675 ...


    AliExpress
    https://www.aliexpress.com › ...
    AliExpress
    https://www.aliexpress.com › ...
    Jan 22, 2026 — Miniature ball bearings for precision applications. Includes 673, 674, 675, 676, 677, 678, 679ZZ models. High-quality NSK bearings.
    Missing: Frictionless ‎| Show results with: Frictionless
    People also search for
    Frictionless 678 ball bearing sizes
    Frictionless 678 ball bearing equivalent

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