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6203A/42 Bearing 17×42×12mm Deep Groove Ball Bearing | RHD

The 6203A/42 represents a specialized variant designed for applications requiring a 17mm bore with enhanced load handling capabilities. This bearing combines the precision engineering of the 6200 series with the unique dimensional requirements of specialized machinery and equipment. Its 42×12mm profile provides the perfect balance between compact design and robust performance, making it ideal for applications where standard bearing dimensions don't meet specific design requirements.

Meet the 6203A/42: With 977kg (9.58kN) of engineering excellence and 17mm 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.

17mm
Bore Diameter
42mm
Outer Diameter
12mm
Width
9.58 kN
Load Rating
977 Kg
Load Capacity
0.064 Kg
Weight
Technical Specifications Applications 📞 Call +91-9702081858
6203A/42 Bearing 17×42×12mm - RHD Bearings

6203A/42 BEARING SPECIFICATIONS

Precision-engineered for reliability and performance

🔍 Common Search Terms

What bearing fits a 17mm shaft for specialized industrial equipment? Which bearing is best for custom automotive transmission systems? What's the load capacity of a 6203A/42 bearing? How fast can a 6203A/42 bearing rotate? What clearance options are available for 6203A/42? Which seal type is best for specialized research equipment?

📏Dimensions

d - ID (Bore Diameter)
17mm
D - OD (Outer Diameter)
42mm
B - Width
12mm
6203A/42 Bearing: 17 × 42 × 12mm

Bearing Cross-Sectional View

6203A/42 Bearing Cross-Sectional View

⚡Load Ratings

Dynamic Load (Cr) 9.58kN
Static Load (Cor) 4.78kN
Load Capacity (kN) 9.58kN
Load Capacity (kg) 977kg

ðŸ’ĄWhat This Means

Dynamic Load (9.58kN): Maximum force while rotating. Exceeding this causes rapid wear and failure within hours.
Static Load (4.78kN): 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 16000 RPM
Oil Lubrication 20000 RPM
RHD Z2V2 Bearings 1400 RPM
RHD Z3V3 Bearings 2880 RPM
RHD Z4V4 Bearings 6000+ RPM

ðŸ’ĄWhat This Means

Grease Limit (16000 RPM): Heat generation increases exponentially above this. Grease breaks down, causing seizure.
Oil Advantage (20000 RPM): Better heat dissipation allows higher speed. Required for high-speed spindles.
Safe Operating Speed: Use 90% of limit (14400 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 6203A/42 application worldwide

📊Vibration Classes

V2 Grade
Low: 110 Ξm/s
Med: 78 Ξm/s
High: 60 Ξm/s
V3 Grade
Low: 65 Ξm/s
Med: 46 Ξm/s
High: 35 Ξm/s
V4 Grade
Low: 52 Ξm/s
Med: 25 Ξm/s
High: 25 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 < 41 dB
Z3 Grade < 36 dB
Z4 Grade (Quiet) < 31 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) 0-9 Ξm
C0 (Normal) 3-18 Ξm
C3 (Loose) 11-25 Ξm
C4 (High Temp) 18-33 Ξm
C5 (Extra High Temp) 25-45 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

6203A/42-ZZ

Most Popular

Double metal shields

Speed Factor: 0.9 (14400 RPM)
Protection: Dust protection
Lubrication: Sealed for life

When to Use 6203A/42-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

6203A/42-2RS

Protected

Double rubber seals

Speed Factor: 0.7 (11200 RPM)
Protection: Moisture and dust
Lubrication: Sealed for life

When to Use 6203A/42-2RS

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

6203A/42

High Speed

Open bearing, no seals

Speed Factor: 1.0 (16000 RPM)
Protection: None
Lubrication: External required

6203A/42-Z

Balanced

Single metal shield

Speed Factor: 0.95 (15200 RPM)
Protection: Light dust protection
Lubrication: Pre-greased

6203A/42-RS

Protected

Single rubber seal

Speed Factor: 0.8 (12800 RPM)
Protection: Moisture and dust
Lubrication: Pre-greased, sealed

APPLICATIONS

Precision performance across industries

Specialized Industrial Equipment

  • Custom machinery
  • Specialized conveyors
  • Unique drive systems
  • Custom automation
  • Specialized pumps
  • Custom compressors
  • Unique material handling
  • Specialized processing

Key Requirements: Must handle specific dimensional requirements, provide reliable performance under varying loads, and maintain precision in specialized applications.

Custom Automotive Systems

  • Custom transmission systems
  • Specialized drivetrain components
  • Custom steering mechanisms
  • Unique suspension systems
  • Custom engine components
  • Specialized brake systems
  • Custom clutch mechanisms
  • Unique cooling systems

Key Requirements: Must withstand automotive temperature ranges, provide reliable performance under varying loads, and maintain precision in harsh environments.

Precision Engineering & Research

  • Research equipment
  • Custom measurement devices
  • Specialized laboratory equipment
  • Custom optical systems
  • Unique positioning devices
  • Specialized calibration equipment
  • Custom testing apparatus
  • Unique research instruments

Key Requirements: Must maintain high precision, provide smooth operation, and deliver consistent performance in specialized research and engineering environments.

Compatible Models & Shaft Requirements

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

🔄Related Models

6201 12.7 (12.7×32×10mm) 6202 12.7 (12.7×35×11mm) 6203 12.7 (12.7×40×12mm) 6204/22 (dimensions)

🔧Shaft Requirements

Nominal Diameter 17mm
Tolerance Grade h6
Surface Finish Ra 0.8Ξm max
Runout Tolerance 0.01mm max

ðŸŽŊApplication-Specific Options

High Temperature: 6203A/42 with C3 clearance
High Speed: 6203A/42-Z for balanced performance
Corrosive Environment: 6203A/42-2RS for maximum protection

Professional Expertise & Standards

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

📏Precision Engineering

17mm bore with h6 tolerance provides Âą0.011mm precision fit, essential for specialized industrial equipment and custom automotive applications.

🔎Material Science

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

⚙ïļPerformance Optimization

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

Handles 9.58kN dynamic load capacity while providing unique 17mm bore for specialized applications. Superior Gcr15 steel vs. standard steel in competing products.

💰Value Engineering

Best value in specialized bearing category for 9.58kN performance. Quality bearings last 3-10x longer than cheap alternatives, reducing total cost of ownership.

FREQUENTLY ASKED QUESTIONS

Expert guidance for 6203A/42 bearing applications

Selection & Replacement ▾

What makes the 6203A/42 unique compared to standard bearings?

The 6203A/42 has a unique 17mm bore diameter, making it ideal for applications requiring this specific shaft size that standard bearings don't provide.
Why This Matters
This allows for perfect shaft fit in specialized applications without requiring custom machining or compromised solutions.
How To Handle It
Measure your shaft diameter precisely. If it's exactly 17mm, this bearing provides the ideal fit.
Use a micrometer for precise measurement - even 0.1mm difference can affect performance significantly.

Can the 6203A/42 handle specialized industrial applications?

Yes, the 6203A/42 is specifically designed for specialized industrial equipment, offering high load capacity and reliable performance under varying conditions.
Why This Matters
Specialized industrial applications require bearings that can handle specific dimensional requirements and maintain reliability.
How To Handle It
Choose appropriate seal options based on your environment and ensure proper installation and maintenance.
Consider environmental factors and operating conditions when selecting seal options.

What's the load capacity of the 6203A/42?

The 6203A/42 has a dynamic load capacity of 977.16kg (9.58kN) (977kg) and static load capacity of 4.78kN (487kg).
Why This Matters
This load capacity determines what applications the bearing can handle safely and reliably.
How To Handle It
Calculate your application's maximum load and ensure it doesn't exceed the bearing's capacity.
For safety, keep loads below 80% of the dynamic load rating for optimal bearing life.
Installation & Maintenance ▾

What shaft tolerance is recommended for the 6203A/42?

An h6 tolerance grade is recommended for the shaft, which provides a precision fit with the 17mm bore.
Why This Matters
Proper shaft tolerance ensures optimal bearing performance, reduces vibration, and extends bearing life.
How To Handle It
Machine your shaft to 17mm with h6 tolerance (Âą0.011mm) for the best fit.
Use precision measuring tools to verify shaft dimensions before installation.

How should I lubricate the 6203A/42 bearing?

Use high-quality grease or oil suitable for your operating conditions. The bearing can handle up to 16,000 RPM with grease lubrication.
Why This Matters
Proper lubrication reduces friction, prevents wear, and extends bearing service life.
How To Handle It
For sealed versions, the bearing comes pre-lubricated. For open versions, apply appropriate lubricant during installation.
Choose lubricants rated for your operating temperature range and speed requirements.

What's the maximum speed for the 6203A/42?

The 6203A/42 can operate at up to 16,000 RPM with grease lubrication and 20,000 RPM with oil lubrication.
Why This Matters
Operating within speed limits prevents overheating and premature bearing failure.
How To Handle It
Choose the appropriate seal type based on your speed requirements and environmental conditions.
Sealed versions have reduced speed ratings due to increased friction from seals.
Troubleshooting ▾

Why is my 6203A/42 bearing running hot?

High temperatures usually indicate insufficient lubrication, excessive load, or speed beyond the bearing's capabilities.
Why This Matters
Overheating can cause premature bearing failure and damage to surrounding components.
How To Handle It
Check lubrication levels, verify load doesn't exceed capacity, and ensure speed is within limits.
Monitor bearing temperature during operation - it should remain stable and not exceed 80°C.

What causes excessive vibration in the 6203A/42?

Excessive vibration can be caused by improper shaft fit, misalignment, or bearing damage from improper handling.
Why This Matters
High vibration reduces precision, increases wear, and can damage other components.
How To Handle It
Check shaft fit, ensure proper alignment, and inspect for visible damage or contamination.
Use vibration analysis tools to identify the specific frequency causing the issue.

How do I know if my 6203A/42 bearing needs replacement?

Signs include increased noise, excessive vibration, elevated temperature, or reduced precision in your application.
Why This Matters
Continuing to use a worn bearing can cause damage to other components and reduce system performance.
How To Handle It
Monitor bearing performance regularly and replace when performance degrades beyond acceptable limits.
Keep spare bearings on hand for critical applications to minimize downtime.
Cost & Performance ▾

Is the 6203A/42 worth the investment for specialized applications?

Yes, the 6203A/42 provides the unique 17mm bore diameter required for specialized applications, eliminating the need for custom solutions.
Why This Matters
Specialized applications often require unique dimensional specifications that standard bearings cannot provide.
How To Handle It
Calculate the total cost including installation, maintenance, and potential downtime from using alternative solutions.
Consider the long-term value of having the exact fit required for your specialized application.

What's the expected service life of the 6203A/42?

With proper installation and maintenance, the 6203A/42 can provide 50,000+ hours of service life.
Why This Matters
Longer service life reduces replacement costs and system downtime over time.
How To Handle It
Follow proper installation procedures, maintain adequate lubrication, and operate within load and speed limits.
Regular maintenance and monitoring can extend bearing life beyond the expected 50,000 hours.

How does the 6203A/42 compare to other specialized bearing options?

The 6203A/42 offers excellent load capacity, precision, and speed capability at a competitive price point for specialized applications.
Why This Matters
Understanding the value proposition helps justify the investment in quality bearings.
How To Handle It
Compare specifications, performance data, and total cost of ownership with alternative solutions.
Consider factors beyond just the initial price, including maintenance costs and system performance.
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