628 ZZ Deep Groove Ball Bearing Low Friction Bearing for Industrial Machinery | 8x24x8 mm

The 628-ZZ is a Standard Deep Groove Ball Bearing designed for robust and durable performance in a variety of mechanical applications. Featuring double metal shields (ZZ) on both sides, this metric bearing offers reliable protection against dust and debris while ensuring smooth operation with low friction. With an 8mm bore, it is a versatile and commonly used component in electric motors, industrial equipment, power transmission systems, and other machinery requiring a dependable and readily available bearing solution.



628 ZZ Deep Groove Ball Bearing 8x24x8 mm | Standard Series | Double Shielded

A dependable and widely utilized bearing built with the universal deep groove geometry. Engineered for consistent performance at speeds up to 30,000 r/min (Oil). The 628-ZZ is capable of supporting moderate to high radial loads, making it a standard choice for general industrial applications, motor repairs, and OEM designs.

628 ZZ Deep Groove Ball Bearing Double Shielded Standard Bearing for Industrial Machinery

Comprehensive Applications

Ideally suited for a broad range of general industrial and machinery applications:

Electric Motors & Drives
  • General Purpose AC/DC Motors
  • Appliance Motors
  • Automotive Accessory Motors
  • Treadmill & Fitness Motors
Industrial Machinery
  • Conveyor Systems & Rollers
  • Agricultural Machinery
  • Food Processing Equipment
  • Packaging Machinery
Power Transmission & Gearboxes
  • Small Gearboxes & Reducers
  • Power Tool Gear Trains
  • Drive Pulleys & Idlers
  • Light-duty Drivelines
Pumps & Fans
  • Centrifugal Pumps
  • Industrial Blower Fans
  • HVAC Fan Motors
  • Exhaust Fans

Key Performance Features

01. Design & Protection

The dual non-contact pressed steel shields provide effective two-sided sealing against dust and larger airborne contaminants. This design helps to retain lubrication for extended service intervals while maintaining low operational torque.

02. Robust & General-Purpose Construction

As part of the standard bearing series, the 628-ZZ delivers a strong balance of load capacity and durability. Its common dimensions make it an excellent choice for both new designs and as a replacement part in a wide array of equipment.

03. Smooth & Reliable Running

Manufactured to established industrial tolerances to ensure consistent quality (up to P5 precision grades). The reliable deep groove design promotes stable and smooth rotation, suitable for continuous operation in motors, gearboxes, and conveyor systems.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series Standard Series
Basic Designation 628
Suffix ZZ (Both sides with steel shields)
Bore Diameter (d) 8 mm
Outer Diameter (D) 24 mm
Width (B) 8 mm
Material (Races & Balls) Chrome Steel (GCr15 / SAE 52100)
Precision Class Standard / P5 Grade Available
Cage Material Pressed Steel Ribbon
Dynamic Load Rating (Cʳ) 5.40 kN
Static Load Rating (C₀ʳ) 2.60 kN
Limiting Speed (Grease) 24,000 r/min
Limiting Speed (Oil) 30,000 r/min
Weight (approx.) 19.0 g

Interchange Part Numbers

Direct replacement for:

  • SKF: 628-2Z
  • NSK: 628 ZZ
  • FAG: 628 ZZ
  • NTN: 628ZZ

Design & Configuration

The 628-ZZ comes standard with double pressed steel shields for effective contamination exclusion. For applications in damp or oily environments, variants with rubber contact seals (628-2RS) are offered to provide enhanced sealing, albeit with slightly higher starting torque.

"For general industrial motors and drives, the 628-ZZ provides a reliable and cost-effective solution with good contamination protection."



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