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698 Deep Groove Ball Bearing 8×19×6mm | RHD Bearings

Eight millimeter bore that's the bridge between miniature and standard - big enough to handle serious work, small enough to fit anywhere.

Meet the 698: With 229kg (2.25kN) of engineering excellence and 8mm precision, this bearing delivers the perfect blend of personality and performance for your critical applications. The most widely used bearing in electronics, small motors, and precision instruments.

8mm
Bore Diameter
19mm
Outer Diameter
6mm
Width
2.25 kN
Load Rating
229 Kg
Load Capacity
0.0085 Kg
Weight
Technical Specifications Applications 📞 Call +91-9702081858
698 Bearing 8×19×6mm - RHD Bearings

698 BEARING SPECIFICATIONS

Precision-engineered for reliability and performance

🔍 Common Search Terms

698 bearing dimensions 8mm bore ball bearing industrial power bearing industrial machinery bearing power transmission bearing precision instrument bearing

📏Dimensions

d - ID (Bore Diameter)
8mm
D - OD (Outer Diameter)
19mm
B - Width
6mm
698 Bearing: 8 × 19 × 6mm

Bearing Cross-Sectional View

698 Deep Groove Ball Bearing Technical Drawing

⚡Load Ratings

Dynamic Load (Cr) 2.25kN
Static Load (Cor) 0.92kN
Load Capacity (kN) 2.25kN
Load Capacity (kg) 229kg

💡What This Means

Dynamic Load (2.25kN): Maximum force while rotating. Exceeding this causes rapid wear and failure within hours.
Static Load (0.92kN): Maximum force when stationary. Use 80% for safety.
Calculate Your Load: Measure shaft forces, belt tensions, or gear loads. Include shock/vibration factors.
Failure Warning: Overloading causes bearing raceways to crack and balls to flatten permanently.

🔄Speed Limits

Grease Lubrication 28000 RPM
Oil Lubrication 36000 RPM
RHD Z2V2 Bearings 1400 RPM
RHD Z3V3 Bearings 2880 RPM
RHD Z4V4 Bearings 6000+ RPM

💡What This Means

Grease Limit (28000 RPM): Heat generation increases exponentially above this. Grease breaks down, causing seizure.
Oil Advantage (36000 RPM): Better heat dissipation allows higher speed. Required for high-speed spindles.
Safe Operating Speed: Use 90% of limit (25200 RPM) for maximum L10 life of 10,000+ hours.
Failure Mode: Exceeding speed causes cage failure, ball skidding, and catastrophic overheating within minutes.

🔧Material & Quality

Steel Grade SAE52100
Ball Grade G10
Carbon Content 0.95-1.05%
Chromium Content 1.40-1.65%
ISO Standard 15:2011 Compliant

💡What This Means

SAE52100 Chrome Steel: Premium bearing steel - harder than tool steel
G10 Balls: Ultra-precision balls with ±0.25µm tolerance
High Carbon: Superior hardness and wear resistance
Chromium: Adds corrosion resistance and toughness
ISO Standard: Fits any 698 application worldwide

📊Vibration Classes

V2 Grade
Low: 72 μm/s
Med: 48 μm/s
High: 40 μm/s
V3 Grade
Low: 44 μm/s
Med: 28 μm/s
High: 24 μm/s
V4 Grade
Low: 38 μm/s
Med: 12 μm/s
High: 12 μm/s

💡What This Means

V2 Grade: Standard grade - good for general applications
V3 Grade: Low vibration - like a smooth car engine
V4 Grade: Ultra-smooth - for precision instruments
Frequency Bands: Measured across different rotation speeds

🔇Noise Levels

Z2 Grade < 35 dB
Z3 Grade < 31 dB
Z4 Grade (Quiet) < 27 dB
Application Precision Equipment

💡What This Means

Z2 Grade: Quiet as a library - good for most applications
Z3 Grade: Very quiet - like a whisper (40 dB = normal whisper)
Z4 Grade: Ultra-quiet - perfect for bedroom fans, medical equipment
Application: Ideal for sensitive environments

⚙️Internal Clearance

C2 (Tight) 0-7 μm
C0 (Normal) 2-13 μm
C3 (Loose) 8-23 μm
C4 (High Temp) 14-29 μm
C5 (Extra High Temp) 20-37 μm

💡What This Means

C2 (Tight): Precision applications - less play, more accurate
C0 (Normal): Standard choice - works for most applications
C3 (Loose): Better for hot environments - allows thermal expansion
C4 (Exta Loose): Hot or tight-fit setups — extra room for thermal expansion.
C5 (Max Loose): Extreme heat/tight fits or near-limit speeds — maximum expansion allowance

SEAL OPTIONS

Choose the right protection for your application

698-ZZ

Most Popular

Double metal shields

Speed Factor: 0.9 (28800 RPM)
Protection: Dust protection
Lubrication: Sealed for life

When to Use 698-ZZ

Best For: Electronics, small motors, skateboards, general machinery
Conditions: Dry environments, moderate dust, precision applications
Achieves: Excellent balance of speed and protection for most applications
Avoid When: Heavy water exposure, chemical environments, food processing

698-2RS

Protected

Double rubber seals

Speed Factor: 0.7 (22400 RPM)
Protection: Moisture and dust
Lubrication: Sealed for life

When to Use 698-2RS

Best For: Outdoor applications, appliances, automotive systems, dirty environments
Conditions: Moisture, dust, contamination, washdown areas, food processing
Achieves: Maximum protection and zero maintenance requirements
Trade-off: Lower speed limit but superior environmental protection

698

High Speed

Open bearing, no seals

Speed Factor: 1.0 (32000 RPM)
Protection: None
Lubrication: External required

698-Z

Balanced

Single metal shield

Speed Factor: 0.95 (30400 RPM)
Protection: Light dust protection
Lubrication: Pre-greased

698-RS

Protected

Single rubber seal

Speed Factor: 0.8 (25600 RPM)
Protection: Moisture and dust
Lubrication: Pre-greased, sealed

APPLICATIONS

Precision performance across industries

Industrial Power

  • industrial machinery
  • power transmission
  • conveyor systems
  • packaging equipment
  • textile machinery
  • printing presses
  • woodworking tools
  • metalworking equipment

Key Requirements: 8mm shaft with 2.25kN dynamic load capacity, 28,000 RPM grease lubrication, industrial power 19×6mm profile for demanding applications

Precision Systems

  • precision instruments
  • measuring devices
  • calibration tools
  • sensor assemblies
  • test equipment
  • laboratory instruments
  • scientific equipment
  • optical systems

Key Requirements: 8mm precision shaft with 0.92kN static load rating, precision capability, minimal friction for precision applications

Automotive & Aerospace

  • automotive components
  • aerospace systems
  • aviation equipment
  • spacecraft components
  • satellite systems
  • drone mechanisms
  • robotic systems
  • control mechanisms

Key Requirements: 8mm shaft with 229kg load capacity, robust 8g design, reliable 28,000 RPM operation for automotive and aerospace applications

Compatible Models & Shaft Requirements

Find bearings with the same bore size and ensure proper shaft preparation

🔄Related Models

688 (8×16×5mm) 608 (8×22×7mm) 628 (8×24×8mm)

🔧Shaft Requirements

Nominal Diameter 8.000mm
Tolerance Grade h6 (7.991-8.000mm)
Surface Finish Ra 0.8μm max
Runout Tolerance 0.013mm max

🎯Application-Specific Options

High Temperature: C3 clearance recommended
High Speed: RHD V3 & V4 bearings recommended
Corrosive Environment: SS (Stainless Steel) bearings recommended

Professional Expertise & Standards

Technical insights from 20+ years of bearing engineering and manufacturing excellence

📋ISO Compliance

ISO 15:2011 compliant dimensions ensure interchangeability with global bearing standards and seamless replacement in existing equipment.

🔬Material Science

Gcr15 chrome steel composition optimized for industrial power bearing applications, providing superior hardness, wear resistance, and fatigue life.

⚙️Precision Engineering

C0 clearance standard for most applications, C3 available for high-temperature use. h6 shaft tolerance recommended for optimal performance.

🔧Professional Installation

Professional installation required for maximum 50,000-hour service life. Proper tools and techniques prevent 80% of premature failures.

📊Performance Comparison

Shares the 8mm bore (ID) with 688, 608, 628, so it can be considered where the shaft is fixed at 8mm. The 698 is rated 2.25kN dynamic / 0.92kN static at 19mm OD — more capacity than the 688 (1.38kN) and less than the heavier-duty 608 (3.32kN).

💰Value Engineering

Best value in industrial power bearing category for 2.25kN performance. Quality bearings last 3-10x longer than cheap alternatives, reducing total cost of ownership.

FREQUENTLY ASKED QUESTIONS

Expert guidance for 698 bearing applications

Bearing Selection & Replacement ▼

When should I choose 698 bearing over 697 alternatives?

Choose 698 when you need 8mm shaft diameter with 140.76kg (1.38kN) dynamic load capacity for industrial power, precision systems, or applications requiring larger 19×6mm profile than 697 bearings can provide.
Why This Matters
Selecting the right bearing size prevents system redesign, reduces costs, and ensures optimal performance for your specific application requirements.
How To Handle It
Measure your shaft diameter (must be exactly 8mm), verify load requirements (≤140.76kg (1.38kN) dynamic), and confirm space constraints allow 19×6mm envelope.
698 is ideal for industrial power, precision systems, and applications where 8mm shaft and robust design are required.

Can 698 bearing replace other 8mm bore bearings?

Yes, 698 can replace other 8mm bore bearings if they have compatible outer diameter (≤19mm) and width (≤6mm) requirements, and load capacity needs (≤140.76kg (1.38kN) dynamic).
Why This Matters
Proper replacement ensures system compatibility, prevents premature failures, and maintains performance specifications.
How To Handle It
Verify dimensional compatibility (d×D×B), check load ratings, confirm clearance requirements, and ensure speed limitations are met.
Always check both dimensional and performance compatibility before replacement to avoid system issues.

What applications are 698 bearings NOT suitable for?

698 bearings are NOT suitable for applications requiring dynamic loads >140.76kg (1.38kN), speeds >32,000 RPM, operating temperatures >120°C, or environments with heavy contamination.
Why This Matters
Using bearings beyond their specifications leads to premature failure, increased maintenance costs, and potential system damage.
How To Handle It
For higher loads, consider 699 or larger bearings. For higher speeds, use oil lubrication. For harsh environments, consider sealed or stainless steel alternatives.
Always verify application requirements against bearing specifications to ensure long service life.
Installation & Maintenance ▼

What tools are needed for proper 698 bearing installation?

For 698 bearing installation, you need precision tools: 8mm bore gauge, micrometer for shaft measurement, bearing heater (80-100°C), clean gloves, and appropriate mounting tools for the 19mm outer diameter.
Why This Matters
Proper tools ensure accurate installation, prevent bearing damage, and maximize service life while maintaining precision requirements.
How To Handle It
Clean all components thoroughly, verify shaft dimensions (7.991-8.000mm), heat bearing to 80-100°C, and use proper mounting techniques to avoid damage.
Never force-fit 698 bearings - the 8mm bore requires precise shaft tolerances for optimal performance.

How often should 698 bearings be lubricated?

Open 698 bearings require lubrication every 3-6 months depending on operating conditions. Shielded/sealed versions are lubricated for life but may need replacement after 2-3 years.
Why This Matters
Proper lubrication prevents wear, reduces friction, and extends bearing life. Over-lubrication can cause overheating, while under-lubrication leads to premature failure.
How To Handle It
Monitor operating temperature and noise levels. For open bearings, use high-quality grease compatible with operating conditions. Replace sealed bearings when performance degrades.
698 bearings in high-speed applications (>20,000 RPM) may require more frequent lubrication due to increased operating temperatures.

What maintenance schedule is recommended for 698 bearings?

For 698 bearings, inspect monthly for noise, vibration, and temperature changes. Clean and relubricate open bearings every 3-6 months. Replace sealed bearings every 2-3 years or when performance degrades.
Why This Matters
Regular maintenance prevents unexpected failures, maintains precision performance, and extends bearing service life in critical applications.
How To Handle It
Establish maintenance logs, monitor operating parameters, and replace bearings proactively rather than reactively. Use vibration analysis for early failure detection.
698 bearings in industrial power applications require more frequent inspection due to critical performance requirements.
Troubleshooting & Problem Solving ▼

Why is my 698 bearing making unusual noise?

Unusual noise in 698 bearings typically indicates contamination, improper lubrication, misalignment, or wear. The 8mm bore is sensitive to shaft imperfections and contamination due to its size.
Why This Matters
Early noise detection prevents bearing failure, maintains precision, and reduces maintenance costs in industrial power applications.
How To Handle It
Inspect for contamination, check lubrication levels, verify shaft alignment and surface finish, and replace bearing if noise persists or worsens.
698 bearings amplify noise due to their size - what sounds minor in larger bearings can indicate serious issues in industrial power bearings.

What causes 698 bearing overheating?

698 bearing overheating is caused by over-lubrication, excessive load (>140.76kg (1.38kN)), high speeds (>32,000 RPM), misalignment, or contamination. The size makes 698 bearings sensitive to these conditions.
Why This Matters
Overheating accelerates wear, reduces precision, and can cause catastrophic failure in industrial power bearing applications.
How To Handle It
Check lubrication quantity and type, verify load and speed limits, inspect alignment, clean contamination, and ensure proper ventilation around the bearing.
698 bearings have limited heat dissipation due to size - monitor temperature closely in high-speed applications.

How do I diagnose 698 bearing vibration issues?

Diagnose 698 bearing vibration by checking shaft runout (≤0.013mm), verifying balance, inspecting for contamination, and measuring vibration levels against V2/V3/V4 standards for 8mm bore bearings.
Why This Matters
Excessive vibration reduces precision, increases wear, and can damage connected equipment in industrial power applications.
How To Handle It
Use vibration analysis tools, check shaft specifications, verify bearing installation, and replace bearing if vibration exceeds acceptable limits.
698 bearings require higher precision in shaft preparation due to their size and sensitivity to imperfections.
Cost & Performance Optimization ▼

How can I optimize 698 bearing performance for cost efficiency?

Optimize 698 bearing performance by selecting appropriate clearance (C0 for most applications), using proper lubrication, maintaining clean environment, and implementing preventive maintenance to extend service life beyond 50,000 hours.
Why This Matters
Performance optimization reduces total cost of ownership, minimizes downtime, and ensures consistent precision in industrial power applications.
How To Handle It
Choose clearance based on application requirements, establish maintenance schedules, monitor operating conditions, and replace bearings proactively rather than reactively.
698 bearings offer excellent value when properly maintained - their industrial power size means replacement costs are minimal compared to system downtime.

What factors affect 698 bearing service life?

698 bearing service life is affected by load conditions (≤140.76kg (1.38kN)), operating speed (≤32,000 RPM), environmental cleanliness, lubrication quality, installation precision, and maintenance practices.
Why This Matters
Understanding service life factors helps optimize maintenance schedules, reduce costs, and ensure reliable operation in critical industrial power applications.
How To Handle It
Monitor operating parameters, maintain clean environment, use quality lubricants, implement preventive maintenance, and replace bearings based on performance degradation.
698 bearings can achieve 50,000+ hours service life when operated within specifications and properly maintained.

How do 698 bearings compare to alternatives in terms of total cost?

698 bearings offer excellent total cost value for industrial power applications due to their industrial power size, reliable performance, and low replacement costs. Quality 698 bearings last 3-10x longer than cheap alternatives, reducing total cost of ownership.
Why This Matters
Total cost analysis helps make informed purchasing decisions, considering initial cost, maintenance, replacement, and downtime costs over the bearing's service life.
How To Handle It
Compare initial costs, expected service life, maintenance requirements, and replacement costs. Consider system downtime costs when evaluating alternatives.
698 bearings provide optimal cost-performance ratio for industrial power applications when quality and proper maintenance are prioritized.
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