Minature 684 Ball Bearings 4mm X 9mm X 2.5mm

684 Ball Bearings

Model Numbers: 684, B684ZZ, 684ZZ

Brands Carried: MISUMI, NSK, EZO

Bearing Sizing: ID 4mm X OD 9mm X W 2.5mm, 4 mm Ball Bearing

Bearing Seals: Open, Double Shielded

For more 684 ball bearings and seal options — we have hundreds visit MISUMI.



Select Part Numbers to Buy 684 Ball Bearings


Open Type 684
Single Shielded
Double Shielded B684ZZ 684ZZ
Rubber Sealed


Please select between the four options above:

Open Type:
Ball Bearings Open
684 Ball Bearing
Single Shielded:
Ball Bearings Single Shielded
Double Shielded:
Ball Bearings Double Shielded
B684ZZ Ball Bearing
684ZZ Ball Bearing
Rubber Sealed:
Ball Bearings Rubber Sealed


Miniature Ball Bearings 684 – 4X9X2.5mm Description

The 684 is a 4 mm Ball Bearing that can be used in many rotary and factory automation applications. The 684 Miniature Ball Bearings is an open style bearing. The 684ZZ ball bearing has a single row raceway and it is shielded on each side. The 684 4 mm Ball Bearing Inner Dimension 4mm X Outer Dimension 9mm X Width 2.5mm is an open style ball bearing designed for high rotational speeds and high dynamic loads.


684 Ball Bearings 4X9X2.5mm Specifications & Dimensions


Universal 684
Type Ball
Inner/Outer Ring Material Steel
Precision Grade 0
Inner Dimension d(Ø) 4
Outer Dimension D(Ø) 9
Width B (or T)(mm) 2.5
Retainer Type Punching
Load Direction Radial
Specifications/Environment Standard
Number of Raceway Ring Rows Single Track
Size Standards Metric Series
684 Ball Bearings Dimensions


Miniature Ball Bearings 684 – Technical Specifications/Dimensions


Open Ball Bearings



Single Shielded Ball Bearings



Double Shielded Ball Bearings


MISUMI B684ZZ Double Shielded PDF Link
NSK 684ZZ Double Shielded PDF Link

Rubber Sealed Ball Bearings



Other Ball Bearing Series



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