RAS Bearings

Bearings Quality Control

Quality That Works in the Real World

At RAS Bearings, quality is not just a checkpoint it’s a way of working. Every bearing we produce reflects our Zero Defects objective, backed by stringent quality checks and international certifications. From the drawing board to final dispatch, our Quality Management System ensures that each product meets global benchmarks and delivers reliable, long-term performance.

We combine decades of experience, advanced testing infrastructure and customer focused quality systems to deliver bearings that are tested, trusted and proven.

Our Quality Philosophy: Zero Defects, Always

  • Zero Defects Objective: No bearing leaves our facility unless it meets required standards.
  • In-Process Quality Control: Checks are carried out at every production stage to prevent errors.
  • 100% Inspection: ID, OD, width, radial clearance and noise levels are verified on every bearing.
  • Compliance to Tolerances: All inspections adhere to P0 and P6 tolerance classes.

This approach ensures consistent performance, reduces downtime for customers and guarantees bearings that last longer.

Quality Tools and Methodologies

We follow structured methods to ensure repeatability and continuous improvement:

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DFMEA (Design Failure Mode and Effect Analysis)

Identify and mitigate risks before production.

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DoE (Design of Experiments)

Optimise process parameters for best results.

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Process Mapping & Simplification

Ensure leaner, error-free operations.

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Mistake Proofing (Poka-Yoke)

Build prevention into the system.

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Quality Circles

Team-driven problem-solving and kaizen improvements.

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Customer Requirement Training

Aligning quality goals with client expectations.

These tools ensure that RAS Bearings not only meets but often exceeds customer requirements.

End-to-End Quality Assurance Flow

  • Design Stage – Quality planning begins with design reviews, APQP (Advanced Product Quality Planning) and validation studies.
  • Incoming Material Inspection – Raw materials undergo spectro-chemical analysis and metallurgical microstructure checks. Only approved lots are cleared.
  • In-Process Controls – Continuous monitoring of machining, heat treatment, surface finish and geometry.
  • Final Inspection & Validation – 100% checks for dimensions, noise, vibration, hardness and clearance.
  • Traceability & Documentation – Results are digitally stored, printed when required and traceable for audits.

Advanced Instruments in Action

Dimensional Accuracy & Geometry

CONTOURECORD: Measures ball track radius, chamfer angles, distances; results displayed, stored or printed.
PERTHOMETER–MMQ3: Roundness, concentricity and run-out measured; polar charts up to ×10,000 magnification.
PROFILE PROJECTOR: Profiles at ×10, ×20, ×50 magnification to measure radius, angle and distances.

Surface Finish & Waviness

FORM TALYSURF: Precise surface finish analysis with optional attachments for radius forms.
SURFCOM (Portable): On-site surface finish checks; results displayed instantly.
WAVINESS TESTER: Identifies waviness on ball tracks across low, medium and high frequencies.

Strength & Hardness Testing

UTM (Universal Testing Machine): Tensile and compression strength up to 10 metric tons, with graphical records.
MICROVICKERS HARDNESS TESTER: Case hardness checks from 10 g to 1 kg load, with digital readouts.
MPI (Magnetic Particle Inspection): Detects cracks and surface flaws invisible to the eye.

Noise, Vibration & Performance

Noise Testing Machine: 100% bearings checked for NVH (Noise, Vibration, Harshness); results measured in µm/sec at three frequency ranges.
Torque Tester (Computer Aided): Records torque data; used by R&D during product development.

Chemical & Metallurgical Lab

Our dedicated laboratory validates materials before they enter production:

  • Spectro-Chemical Analysis: Ensures correct chemical composition.
  • Metallurgical Microscopy & Image Analysis: Verifies microstructure, case depth, and grain consistency.
  • Only approved raw materials move ahead for processing.

Protective Coatings & Surface Engineering

To enhance performance and life, we provide specialised coatings:

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Phosphating

  • Protects steel against atmospheric corrosion.
  • Creates an ideal base for painting and lubrication.
  • Reduces wear by forming oil reservoirs in the coating.
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Hard Chromium (Functional Chrome Plating)

  • High hardness (~1000 HV)
  • Low friction coefficient
  • Superior wear and corrosion resistance
  • Galling resistance for demanding conditions

These treatments are chosen application-wise, ensuring bearings perform reliably in Indian road and industrial environments.

Quality + R&D = Continuous Improvement

Our Quality Control system is not isolated—it is fully integrated with our R&D division.

  • Use of soft testing and simulation tools before physical validation.
  • Prototyping and endurance checks to validate new designs.
  • Data from torque, NVH, and endurance testing fed back into design improvements.
  • Continuous improvement through closed-loop feedback systems.

Global Certifications & Customer Benefits

RAS Bearings operates with internationally recognised certifications such as IATF 16949:2016 and DIN compliance.
For customers, this translates into:

  • Improved product and process quality
  • Consistent on-time delivery
  • Defect rates caught earlier at lower costs
  • Better supplier quality alignment
  • Increased customer confidence and credibility

Why Choose RAS Bearings for Quality

  • Zero Defects commitment through in-process and 100% inspection.
  • Comprehensive instrumentation covering dimension, surface, geometry, hardness and NVH.
  • Integration with R&D for faster, more reliable product development.
  • Protective coatings like phosphating and hard chrome for extended life.
  • Documentation and traceability for OEM audits and PPAPs.
  • Customer-focused training ensures we align with your specific requirements.

Frequently Asked Questions (FAQs)

What does “Zero Defects” mean at RAS Bearings?

“Zero Defects” means that every bearing is checked with care so that no faulty product ever reaches the customer. We do 100% inspections at each stage, making sure every product performs as expected in the real world.

Do you test every bearing for noise?

Yes. At RAS Bearings, 100% of bearings are tested for noise. We check them across low, medium, and high frequency ranges to ensure smooth and quiet operation, especially important for automotive and industrial use.

How do you check the quality of raw materials?

All incoming materials go through spectro-chemical analysis to check composition and metallurgical microstructure tests to check grain and hardness. Only materials that pass these tests move forward for production.

How does quality control help customers?

Strong quality control means:

  • Bearings last longer
  • Machines need less maintenance
  • Products run smoother with less noise and vibration
  • Customers save time and money with fewer breakdowns

Can customers get printed inspection reports?

Yes. Our instruments generate graphs, charts, and digital records. These can be printed or stored, making them ready for audits, OEM requirements, and quality documentation.

Why is noise and vibration testing important?

Noise and vibration tests help ensure bearings run quietly and efficiently. This improves performance in vehicles, machines, and equipment, making them more comfortable and reliable for end users.

Do you offer custom inspection reports for OEMs?

Yes. We work with OEMs and industrial clients to provide customized reports and testing data that meet their specific application and compliance needs.