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623 Bearing 3×10×4mm Deep Groove Ball Bearing | RHD

The baby of the family but with the confidence of someone who knows they're essential.

Meet the 623: With 66kg (0.65kN) of engineering excellence and 3mm 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.

3mm
Bore Diameter
10mm
Outer Diameter
4mm
Width
0.65 kN
Load Rating
66 Kg
Load Capacity
0.002 Kg
Weight
Technical Specifications Applications 📞 Call +91-9702081858
623 Bearing 3×10×4mm - RHD Bearings

623 BEARING SPECIFICATIONS

Precision-engineered for reliability and performance

🔍 Common Search Terms

623 bearing dimensions 3mm bore bearing load capacity miniature bearing for precision ultra-small bearing microscope bearing 623 bearing specifications

📏Dimensions

d - ID (Bore Diameter)
3mm
D - OD (Outer Diameter)
10mm
B - Width
4mm
d₁ - Shoulder Diameter
≈4.8mm
D₂ - Recess Diameter
≈8.2mm
r₁,₂ - Chamfer Radius
min. 0.15mm
623 Bearing: 3 × 10 × 4mm

Bearing Cross-Sectional View

623 Deep Groove Ball Bearing Technical Drawing

⚡Load Ratings

Dynamic Load (Cr) 0.65kN
Static Load (Cor) 0.22kN
Load Capacity (kN) 0.65kN
Load Capacity (kg) 66kg

ðŸ’ĄWhat This Means

Dynamic Load (0.65kN): Maximum force while rotating. Exceeding this causes rapid wear and failure within hours.
Static Load (0.22kN): 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 38000 RPM
Oil Lubrication 48000 RPM
RHD Z2V2 Bearings 1400 RPM
RHD Z3V3 Bearings 2880 RPM
RHD Z4V4 Bearings 6000+ RPM

ðŸ’ĄWhat This Means

Grease Limit (38000 RPM): Heat generation increases exponentially above this. Grease breaks down, causing seizure.
Oil Advantage (48000 RPM): Better heat dissipation allows higher speed. Required for high-speed spindles.
Safe Operating Speed: Use 90% of limit (34200 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

ðŸ’ĄWhat This Means

SAE52100 Chrome Steel: Premium bearing steel - harder than tool steel
G10 Balls: Ultra-precision balls with Âą0.25Âĩm tolerance
High Carbon: Superior hardness and wear resistance
Chromium: Adds corrosion resistance and toughness
ISO Standard: Fits any 623 application worldwide

📊Vibration Classes

V2 Grade
Low: 48 Ξm/s
Med: 26 Ξm/s
High: 22 Ξm/s
V3 Grade
Low: 31 Ξm/s
Med: 16 Ξm/s
High: 15 Ξm/s
V4 Grade
Low: 28 Ξm/s
Med: 10 Ξm/s
High: 10 Ξm/s

ðŸ’ĄWhat 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 < 32 dB
Z3 Grade < 28 dB
Z4 Grade (Quiet) < 24 dB
Application Precision Equipment

ðŸ’ĄWhat 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

⚙ïļInternal Clearance

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

ðŸ’ĄWhat 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

623-ZZ

Most Popular

Double metal shields

Speed Factor: 0.9 (34200 RPM)
Protection: Dust protection
Lubrication: Sealed for life

When to Use 623-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

623-2RS

Protected

Double rubber seals

Speed Factor: 0.7 (26600 RPM)
Protection: Moisture and dust
Lubrication: Sealed for life

When to Use 623-2RS

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

623

High Speed

Open bearing, no seals

Speed Factor: 1.0 (38000 RPM)
Protection: None
Lubrication: External required

623-Z

Balanced

Single metal shield

Speed Factor: 0.95 (36100 RPM)
Protection: Light dust protection
Lubrication: Pre-greased

623-RS

Protected

Single rubber seal

Speed Factor: 0.8 (30400 RPM)
Protection: Moisture and dust
Lubrication: Pre-greased, sealed

APPLICATIONS

Precision performance across industries

Ultra-Precision Instruments

  • optical instruments
  • microscopes
  • surveying equipment
  • calibration tools
  • laboratory scales
  • precision fixtures
  • metrology systems
  • quality control equipment

Key Requirements: 3mm shaft with 0.65kN dynamic load capacity, 38,000 RPM grease lubrication, ultra-compact 10×4mm profile for precision applications

Micro-Electronic Systems

  • computer cooling fans
  • hard drive motors
  • optical drives
  • printer mechanisms
  • scanner assemblies
  • digital cameras
  • mobile devices
  • gaming consoles

Key Requirements: Ultra-small 3mm bore with 0.15mm chamfer radius, 0.22kN static load rating for stable operation, 66kg load capacity for electronic precision

Miniature Mechanisms

  • watch movements
  • dental equipment
  • medical devices
  • model making
  • hobby projects
  • miniature robotics
  • jewelry mechanisms
  • precision toys

Key Requirements: 3mm bore fits miniature shafts, 4mm width for ultra-compact mounting, 0.002kg weight for efficiency, 48,000 RPM oil lubrication capability

Compatible Models & Shaft Requirements

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

🔄Related Models

604 (4×12×4mm) 634 (4×16×5mm) 684 (4×9×2.5mm) 694 (4×11×4mm)

🔧Shaft Requirements

Nominal Diameter 3.000mm
Tolerance Grade h6 (2.992-3.008mm)
Surface Finish Ra 0.8Ξm max
Runout Tolerance 0.013mm max

ðŸŽŊApplication-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 small bearing applications, providing superior hardness, wear resistance, and fatigue life.

⚙ïļ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

Ultra-compact 3mm bore with 0.65kN load capacity. Superior Gcr15 steel vs. standard steel in competing products.

💰Value Engineering

Best value in ultra-miniature bearing category for 0.65kN performance. Quality bearings last 3-10x longer than cheap alternatives, reducing total cost of ownership.

FREQUENTLY ASKED QUESTIONS

Expert guidance for 623 bearing applications

Bearing Selection & Replacement ▾

What shaft tolerance is recommended for 623 bearing installation?

h6 tolerance grade (2.992-3.008mm) provides optimal fit and performance for 623 bearings.
Why This Matters
Proper shaft tolerance ensures correct interference fit, preventing slippage while allowing thermal expansion.
How To Handle It
Measure shaft diameter with precision micrometers, ensuring it falls within h6 tolerance range before installation.
Use h6 tolerance for standard applications, h5 for ultra-high-precision requirements, and h7 for loose fits.

Can I replace a 623 bearing with a different size bearing?

No, 623 bearings have unique 3×10×4mm dimensions and cannot be replaced with other sizes without mechanical modifications.
Why This Matters
Bearing dimensions are critical for proper fit, load distribution, and system performance in ultra-precision applications.
How To Handle It
Always use exact 623 replacement or consult engineering specifications for alternative solutions.
Keep spare 623 bearings in stock to avoid production delays and ensure consistent quality.

What load capacity does the 623 bearing provide?

623 bearing offers 66.3kg (0.65kN) dynamic load capacity and 0.22kN static load capacity, suitable for ultra-precision applications.
Why This Matters
Load capacity determines bearing suitability for specific applications and operating conditions.
How To Handle It
Calculate actual application loads and ensure they remain within 66.3kg (0.65kN) dynamic limit with appropriate safety factors.
Use 623 bearings for applications requiring up to 66kg load capacity with standard safety margins.
Installation & Maintenance ▾

What lubrication is required for 623 bearings?

623 bearings require grease lubrication for standard applications, with 38,000 RPM capability under proper lubrication conditions.
Why This Matters
Proper lubrication reduces friction, prevents wear, and extends bearing service life significantly.
How To Handle It
Apply high-quality bearing grease during installation and maintain regular lubrication intervals based on operating conditions.
Use lithium-based grease for general applications and synthetic grease for high-temperature or high-speed operations.

How do I properly install a 623 bearing?

Install 623 bearings using proper bearing installation tools, ensuring even pressure distribution and avoiding damage to bearing surfaces.
Why This Matters
Proper installation prevents premature failure, ensures optimal performance, and maintains dimensional accuracy.
How To Handle It
Use bearing heaters for interference fits, apply force evenly, and verify proper seating after installation.
Professional installation tools prevent 80% of premature bearing failures and ensure maximum service life.

What maintenance schedule is recommended for 623 bearings?

623 bearings require regular inspection every 3-6 months, with lubrication replenishment based on operating hours and conditions.
Why This Matters
Regular maintenance prevents unexpected failures, maintains performance, and extends bearing lifespan.
How To Handle It
Establish maintenance schedules based on operating conditions, document all maintenance activities, and monitor bearing condition regularly.
Implement predictive maintenance using vibration analysis to detect issues before they cause failures.
Troubleshooting & Problem Solving ▾

What causes premature failure in 623 bearings?

Common causes include improper installation, inadequate lubrication, contamination, excessive loads, and misalignment.
Why This Matters
Understanding failure causes helps prevent future issues and improves system reliability.
How To Handle It
Implement proper installation procedures, maintain clean environments, ensure adequate lubrication, and monitor operating conditions.
80% of premature failures are preventable through proper installation and maintenance practices.

How do I identify bearing wear in 623 bearings?

Signs of wear include increased noise, vibration, temperature rise, and reduced performance in 623 bearings.
Why This Matters
Early detection of wear prevents catastrophic failures and allows for planned replacement.
How To Handle It
Monitor bearing condition regularly, use vibration analysis equipment, and establish baseline performance measurements.
Implement condition monitoring systems to detect wear patterns before they affect system performance.

What should I do if a 623 bearing fails unexpectedly?

Immediately stop operation, inspect for damage, identify root cause, and replace with properly installed new bearing.
Why This Matters
Quick response prevents secondary damage and minimizes production downtime.
How To Handle It
Document failure details, analyze root causes, implement corrective actions, and maintain spare bearings for critical applications.
Keep detailed failure records to identify patterns and prevent similar issues in the future.
Cost & Performance Optimization ▾

How does 623 bearing cost compare to alternatives?

623 bearings offer excellent value with 66.3kg (0.65kN) load capacity at competitive pricing, providing 3-10x longer lifespan than budget alternatives.
Why This Matters
Total cost of ownership includes initial cost, maintenance, replacement frequency, and downtime costs.
How To Handle It
Calculate total cost of ownership, consider quality vs. price trade-offs, and invest in proper installation and maintenance.
High-quality bearings like 623 typically cost 20-30% more but last 3-10x longer than budget alternatives.

What performance benefits does 623 bearing provide?

623 bearings deliver ultra-compact size, excellent speed capability, precision dimensions, and reliable performance in ultra-precision applications.
Why This Matters
Performance directly impacts system efficiency, reliability, and overall productivity.
How To Handle It
Select 623 bearings for applications requiring 3mm bore, 66.3kg (0.65kN) load capacity, and 38,000 RPM capability.
623 bearings excel in applications requiring ultra-compact size with precision performance capabilities.

How can I optimize 623 bearing performance?

Optimize performance through proper installation, adequate lubrication, contamination control, and regular maintenance practices.
Why This Matters
Optimized performance extends bearing life, reduces maintenance costs, and improves system reliability.
How To Handle It
Follow manufacturer recommendations, implement preventive maintenance, monitor operating conditions, and use quality lubricants.
Proper optimization can extend 623 bearing service life from 20,000 to 50,000+ hours in typical applications.
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