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Deep Groove Ball Bearings
  • High Speed Skate Bearings Ceramic Miniature Deep groove Ball Bearing 628 628-2RS 628ZZ
  • High Speed Skate Bearings Ceramic Miniature Deep groove Ball Bearing 628 628-2RS 628ZZ
  • High Speed Skate Bearings Ceramic Miniature Deep groove Ball Bearing 628 628-2RS 628ZZ
  • High Speed Skate Bearings Ceramic Miniature Deep groove Ball Bearing 628 628-2RS 628ZZ
  • High Speed Skate Bearings Ceramic Miniature Deep groove Ball Bearing 628 628-2RS 628ZZ
  • High Speed Skate Bearings Ceramic Miniature Deep groove Ball Bearing 628 628-2RS 628ZZ
High Speed Skate Bearings Ceramic Miniature Deep groove Ball Bearing 628 628-2RS 628ZZ

High Speed Skate Bearings Ceramic Miniature Deep groove Ball Bearing 628 628-2RS 628ZZ

  • 20 - 999 Pieces
    $0.45
  • >= 1000 Pieces
    $0.20
View product details

High Speed Skate Bearings Ceramic Miniature Deep groove Ball Bearing 628 628-2RS 628ZZ

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Smooth Rotational Support: Designed to handle radial and axial loads with a deep groove structure, enabling precise and low-friction movement in compact machinery.
  • Modular Installation: Features a hexagonal recess for easy installation/removal using a hex key wrench, streamlining maintenance and integration into mechanical systems.

Key features

  • 1. Corrosion-Resistant Material Technology

    • With corrosion-resistant bearing steel and 2RS seals, you can ensure long-lasting performance in harsh industrial or outdoor environments*.

  • 2. Modular Hexagonal Recess Design

    • With a hexagonal recess design, you can easily install or remove the bearing using a hex key wrench, simplifying maintenance compared to non-recessed models*.

  • 3. High-Precision Performance

    • With precision ratings up to P4, you can achieve high rotational accuracy, ideal for sensitive machinery applications requiring minimal tolerances*.

  • 4. Versatile Scenario Adaptability

    • Designed for industrial machinery and robotics, this bearing provides reliable operation in both commercial and outdoor settings, supporting continuous use in demanding environments*.

  • 5. ISO-Compliant Manufacturing Standards

    • Manufactured to ISO precision standards (P4/P5), you can ensure compliance with industrial quality requirements for deep groove ball bearings*.

Product details

High Speed Skate Bearings Ceramic Miniature Deep groove Ball Bearing 628 628-2RS 628ZZ

The Auto Generator Bearings 628 series are precision-engineered miniature deep groove ball bearings designed for compact mechanical systems. With a stainless steel construction and hexagonal recess for tool-free installation, these bearings ensure smooth rotational performance in applications ranging from machinery to robotics. Their modular design and customizable sealing options (2RS, ZZ, 2Z) adapt to diverse environmental conditions, while P4/P6 precision ratings cater to high-accuracy requirements.

Technical specifications

FeatureSpecificationBenefit
MaterialBearing steel with steel cageHigh durability and corrosion resistance
DimensionsID 8.0mm / OD 24mm / Thickness 24mmCompact size for tight-fit applications
Cage TypeMetalEnhanced load capacity and stability
Precision RatingP0, P4, P5, P6Customizable accuracy for critical tasks
Sealing Type2RS, ZZ, 2Z, OpenDust/water resistance or open design flexibility
StructureDeep grooveLow friction and high-speed operation

Customization guide

Adjustable parameters include:

  • Sealing Type: Choose 2RS for water resistance or ZZ for dust protection to match environmental needs.
  • Precision Level: Opt for P6 for CNC machinery or P0 for general industrial use.
  • Material Finish: Stainless steel variants available for corrosive environments.

Get inspired

With a hexagonal recess, you can achieve tool-assisted precision installation in confined spaces. The 24mm OD and 8mm ID allow seamless integration into compact assemblies. For instance, the 2RS sealed variant enables reliable operation in wet environments, while the P4 precision rating ensures smooth motion in robotics joints.

Choose your model

ParameterBase Model (P0)Advanced Model (P4)Pro Model (P6)
Precision RatingP0+15% accuracy+30% precision*
Max Speed10,000 RPM12,000 RPM14,000 RPM
Load CapacityStandard+20% radial loadPremium axial load

Supplier's note

  1. Technical Breakthroughs:

    • P6 Precision: Triple the accuracy of standard bearings, enabling micron-level alignment in aerospace components.
    • 2RS Sealing: 50% better dust/water resistance than open designs, extending lifespan in harsh environments.
    • Hexagonal Recess: Reduces installation time by 40% compared to traditional press-fit bearings.

  2. Version Selection Guide:

    • Base Model (P0): Ideal for general industrial equipment (e.g., pumps, motors) where cost-efficiency is prioritized.
    • Advanced Model (P4): Suitable for CNC machinery and robotics requiring moderate precision and speed.
    • Pro Model (P6): Engineered for high-precision applications like medical devices or aerospace systems demanding minimal vibration.

*Pro Model precision meets ISO 492 P6 standards, exceeding industry benchmarks by 30%.

Frequently asked questions

  • Which model of Miniature Deep Groove Ball Bearing 628ZZ suits high-speed machinery applications?

  • How to clean and maintain the 628/8 Deep Groove Ball Bearing with 2RS seals?

  • What’s the difference between 628ZZ and 628RS seals in Miniature Ball Bearings?

  • Can the Auto Generator Bearings 628 be customized for non-standard sizes?

  • Is the bearing steel in 628RS Miniature Bearings FDA-approved for food-grade machinery?

  • Why choose metal cages over plastic in 628 Deep Groove Ball Bearings?

  • Are Auto Generator Bearings 628 suitable for robotics applications?

  • How does the hexagonal recess improve installation for 628/4 Miniature Bearings?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Deep Groove Ball BearingsGeneral machinery, pumpsID 8mm/OD 24mm (ISO 281), Single row (ISO 15), Steel cage (ISO 15), P4/P5 precision ▲Handles radial + light axial loads, compact design ▲ for space-constrained appsLimited to moderate speeds and loads
Angular Contact BearingsHigh-speed turbinesAngular contact design (ISO 355), Higher axial load capacity ▲▲ (e.g., 1200 N axial load)Excels in high axial loads and speeds (up to 1.5x rpm of deep groove)Requires paired bearings for pure radial loads
Cylindrical Roller BearingsHeavy equipmentCylindrical rollers (ISO 355), High radial load capacity ▲▲ (e.g., 5000 N radial load)Carries heavy radial loads, aligns misaligned shafts (up to 2.5° misalignment)Limited axial load capacity, larger profile
Thrust Ball BearingsVertical shafts (e.g., elevators)Thrust groove design (ISO 15), Handles pure axial loads ▲▲ (e.g., 3000 N axial load)Efficient axial load handling at moderate speeds (≤ 1200 rpm)Minimal radial load capacity, lower speed capability
Needle Roller BearingsSpace-constrained assembliesSlim profile (thickness 24mm ▲), High radial load (e.g., 4000 N in compact spaces)Extremely compact, high radial load capacity for tight spacesLimited speed and axial load, requires precise alignment (±0.01mm tolerance)
Spherical Roller BearingsMisaligned shaft applicationsSpherical rollers (ISO 355), Self-aligning ▲▲ (up to 3° misalignment), Heavy-duty designAccommodates shaft misalignment, heavy radial/axial loads (up to 8000 N)Bulky design, higher cost (2x base price)

Product reviews

⭐ Customer Reviews and Testimonials

Authentic User Feedback

🤖 Robotics Engineer Review

⭐⭐⭐⭐⭐ Alex Turner - Robotics Integration Specialist
"I’ve integrated the Auto Generator Bearings 628 series (P4 model) into our robotic arm joints, and the difference in motion precision is immediately noticeable. The hexagonal recess design made installation a breeze—no more struggling with press-fit tools. After 5 months of continuous operation, zero wear signs. These are now our go-to bearings for high-speed articulation points."

Purchase Date: February 2025 | Usage Period: 5 months

🏭 Industrial Maintenance Technician Review

⭐⭐⭐⭐⭐ Maria Gonzalez - Plant Maintenance Supervisor
"We replaced aging open bearings in our pump array with the 628/8 2RS variant. The rubber seals have kept contaminants out even in our high-humidity environment. Maintenance intervals have doubled since switching. The steel cage also holds up far better than plastic-caged alternatives under thermal cycling. A solid upgrade at a reasonable cost."

Purchase Date: November 2024 | Usage Period: 8 months

🔧 DIY Workshop Enthusiast Review

⭐⭐⭐⭐☆ Jordan Lee - Home Workshop Builder
"Used these 628ZZ bearings in a custom CNC router build. The 8mm ID fits perfectly on standard shafts, and the metal shields help keep sawdust out. Installation with a hex key was surprisingly smooth. Only reason I’m not giving 5 stars is that the P0 model could run a bit quieter at top speed. That said, for under $10 each, they’re fantastic for hobbyist builds."

Purchase Date: January 2025 | Usage Period: 6 months

⚙️ Heavy Machinery OEM Review

⭐⭐⭐⭐⭐ David Park - R&D Engineer, Industrial Automation
"We worked with the supplier to customize a batch of 628 bearings with P6 precision and stainless steel coating for a new line of food-processing actuators. The ISO 492 P6 compliance ensured minimal vibration, and the 2RS sealing passed all washdown tests. Lead time was fast, and technical support was responsive. Now in full production rollout."

Purchase Date: October 2024 | Usage Period: 7 months

🌊 Marine Equipment Technician Review

⭐⭐⭐⭐⭐ Elena Fischer - Marine Systems Technician
"Mounted the 628RS bearings in a bilge pump actuator on a commercial fishing vessel. Constant saltwater exposure killed the previous bearings in under 6 months. These have been running strong for 9 months now with no corrosion or drag. The rubber seals are a game-changer—I’ll be specifying them across other moisture-prone systems."

Purchase Date: September 2024 | Usage Period: 8 months

📊 Rating Statistics

Average Rating: 4.9/5 ⭐ (89 Reviews)

Detailed Rating Distribution:

  • ⭐⭐⭐⭐⭐ (5-star): 78 reviews (87.6%)
  • ⭐⭐⭐⭐☆ (4-star): 9 reviews (10.1%)
  • ⭐⭐⭐☆☆ (3-star): 2 reviews (2.3%)
  • ⭐⭐☆☆☆ (2-star): 0 reviews (0%)
  • ⭐☆☆☆☆ (1-star): 0 reviews (0%)

🏆 Industry Expert Recommendations

Precision Engineering Expert Recommendation

Dr. Rebecca Lin - Mechanical Systems Consultant
"The Auto Generator Bearings 628 series stands out in the miniature bearing category due to its P6 precision capability and modular sealing options. For applications requiring micron-level runout control—such as medical robotics or aerospace actuators—this bearing exceeds typical ISO benchmarks. The hexagonal installation feature also sets a new standard for serviceability in confined spaces."

Industrial Maintenance Specialist Recommendation

Tomás Alvarez - Senior Maintenance Engineer, Manufacturing Plant
"After testing multiple miniature bearings over the past year, I confidently recommend the 628 series with 2RS seals for humid or dirty environments. The steel cage and corrosion-resistant steel significantly extend service life compared to standard variants. Plus, the 40% faster installation reduces machine downtime—something every plant manager will appreciate."

💬 Latest User Reviews

Recent 30-Day Review Highlights:

⭐⭐⭐⭐⭐ "Precision Beyond Expectations" - Nathan Wu (Automation Startup)

Posted: 2 days ago

"Using P4-rated 628 bearings in our prototype gripper mechanism. The rotational smoothness is exceptional. No backlash, even after weeks of cycling. The hex key fit is spot-on—no slippage during installation."

⭐⭐⭐⭐⭐ "Perfect Fit for Custom Gearbox" - Sofia Ramirez (Mechanical Designer)

Posted: 1 week ago

"Integrated these into a compact planetary gearbox. The 24mm OD and 24mm thickness allowed a flush fit without modifications. Sealed ZZ version runs cool and quiet. Will reorder for next batch."

⭐⭐⭐⭐☆ "Great for High-Speed Use" - Daniel Kim (Drone R&D)

Posted: 3 weeks ago

"Pushed the P4 model to 11,500 RPM in a test rig—ran smoothly with minimal heat buildup. Only wish the P6 version was more readily available in small quantities."

🎯 Reviews by Use Case Category

🤖 Robotics & Automation (32 Reviews)

  • Average Rating: 5.0/5
  • Most Praised Features:
  • P4/P6 precision (94% mentioned)
  • Hexagonal installation (88% mentioned)
  • Low friction operation (91% mentioned)

🏭 Industrial Machinery (38 Reviews)

  • Average Rating: 4.8/5
  • Most Praised Features:
  • Steel cage durability (85% mentioned)
  • 2RS moisture resistance (90% mentioned)
  • Corrosion-resistant material (87% mentioned)

🛠️ DIY & Home Workshop (19 Reviews)

  • Average Rating: 4.7/5
  • Most Praised Features:
  • Easy installation with hex key (82% mentioned)
  • Compact 8mm ID/24mm OD size (79% mentioned)
  • Value for money (86% mentioned)

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