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62 Series
Home Deep Groove Ball Bearings 62 Series

628-2RS Miniature Deep Groove Ball Bearing For Compact Mechanisms | 8×24×8 mm

628-2RS Miniature Deep Groove Ball Bearing For Compact Mechanisms | 8×24×8 mm

The 628-2RS is a compact, single-row deep groove ball bearing engineered for space-constrained applications requiring reliable performance under light to moderate loads. Featuring dual RS-type rubber seals, this bearing provides effective protection against dust, moisture, and other contaminants while retaining lubrication for extended service life. With an 8 mm bore and 8 mm width, it is the preferred choice for small electric motors, power tools, and automation equipment where sealing and low friction are critical.

628-2RS Miniature Deep Groove Ball Bearing 8×24×8 mm | Compact Series – Light | Double Sealed

This precision bearing utilizes a classic deep groove raceway geometry, enabling stable high-speed performance up to 22,000 r/min (Grease) with RS seals. The 628-2RS is engineered to accommodate radial loads as well as light axial loads in both directions, making it exceptionally suited for compact applications in power tools, office equipment, medical devices, and instrumentation where consistent, low‑friction operation is required.

628-2RS Miniature Deep Groove Ball Bearing For Compact Mechanisms | 8×24×8 mm

Comprehensive Applications

Ideal for a wide range of light‑duty and precision mechanical systems:

Small Electric Motors & Drives
  • Miniature AC/DC motors for fans and pumps
  • Stepper and servo motors in automation
  • Cordless power tool armatures
  • Cooling fans for electronics and IT equipment
Automotive & Auxiliary Systems
  • Electric window lift motors
  • Windscreen wiper motors
  • Throttle actuators
  • HVAC blend door actuators
Medical & Laboratory Equipment
  • Centrifuges and micro‑centrifuges
  • Dental handpieces
  • Syringe pumps and laboratory stirrers
  • Ventilator blower motors
General Engineering & Consumer Goods
  • 3D printer axes and extruder drives
  • Robotics joints and hobby servos
  • Office automation (printers, copiers, scanners)
  • Textile machinery thread guides
  • Food processing equipment (small conveyors)

Key Performance Features

01. Compact Yet Robust Design

Despite its miniature dimensions (8×24×8 mm), the 628‑2RS delivers a dynamic load rating of 3.45 kN, ensuring reliable operation in applications with limited space. The deep raceway grooves allow it to handle both radial and moderate axial forces.

02. Superior Contamination Protection

Double RS‑type contact rubber seals provide a tight barrier against dust, moisture, and fine particulates from both sides. This design retains lubricant effectively and prolongs bearing life in harsh environments, while the low‑friction seal lip maintains efficiency.

03. Precision‑Engineered for Low Noise and High Speed

Manufactured to ABEC‑1 precision standards with a pressed steel cage, the 628‑2RS ensures quiet, vibration‑free operation. Its optimized internal geometry supports speeds up to 22,000 r/min with grease, making it ideal for high‑rpm miniature drives and spindles.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series Compact Series – Light (ISO 18 series equivalent)
Basic Designation 628
Suffix 2RS (Both sides with rubber seals)
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 (P0 / ABEC 1); P5/P6 grades available
Cage Material Pressed Steel
Dynamic Load Rating (Cʳ) 3.45 kN  
Static Load Rating (C₀ʳ) 1.96 kN
Limiting Speed (Grease) 22,000 r/min
Limiting Speed (Oil) 28,000 r/min 
Weight (approx.) 0.012 kg

Interchange Part Numbers

Direct replacement for:

  • SKF: 628-2RS / 628-2RS/C3
  • NSK: 628DD / 628VV
  • FAG: 628-2RS
  • NTN: 628LLU
  • Timken: 628-2RS

Design & Configuration

The 628‑2RS is equipped with double RS‑type contact rubber seals as standard, delivering enhanced protection against moisture and fine dust in demanding environments. For applications where even lower friction is required, the open variant (628) or metal‑shielded version (628‑2Z / 628ZZ) is also available.

"The 628‑2RS is a versatile miniature bearing that combines high‑speed capability with reliable sealing, ideal for compact drives and precision mechanisms where space is at a premium."

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Request a Quote for Ball Bearings
Please submit your inquiry below for detailed product and pricing information. We will get back to you within 24 hours.
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