Certified Excellence

Quality Control &
Steel Ball Precision

Strict quality control, advanced testing, and certified systems ensure consistent performance across all steel ball applications.

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CERTIFIED MANUFACTURING SYSTEM

Certified Manufacturing System

SDBALLS operates under internationally recognized quality standards and provides comprehensive documentation support to meet the most demanding industrial requirements.

IATF
GLOBAL
16949

IATF 16949

Automotive Quality Management System for the automotive supply chain.

ISO
9001
9001

ISO 9001

Quality Management System ensuring consistent product quality and customer satisfaction.

ISO
14001
14001

ISO 14001

Environmental Management System committed to sustainable and responsible manufacturing.

PPAP Available

Production Part Approval Process support for automotive projects.

FMEA Support

Failure Mode and Effects Analysis support for risk management.

RoHS / REACH

Products comply with RoHS and REACH regulations.

Third-Party Inspection

Support third-party inspection and testing requirements.

Material Certification

Provide material certificates and test reports for every batch.

Full Traceability

Batch traceability system ensures product quality and consistency.

Supporting OEM qualification, industrial audits, and international compliance requirements.

CERTIFIED MANUFACTURING SYSTEM

Production Process Control

01

Raw Material Preparation

  • High-carbon steel wire selection
  • Chemical composition verification
  • Wire drawing to required diameter
02

Cold Heading &Ball Forming

  • High-speed cold heading machines
  • Forming ball blanks with high precision
  • Consistent geometry control
03

Heat Treatment& Hardening

  • Fully automatic heat treatment furnace
  • Controlled temperature & atmosphere
  • Improved hardness and durability
04

Grinding &Precision Sizing

  • Multi-stage precision grinding
  • Diameter and tolerance control
  • High roundness and sphericity
05

Lapping &Surface Finishing

  • Fine lapping for smooth surface
  • Improved surface finish and gloss
  • Reduced friction and noise
06

Final Inspection &Approval

  • Dimensional and tolerance inspection
  • Hardness and surface quality testing
  • Full batch traceability & approval

Strict Process Control

Key parameters monitored at every step

Advanced Equipment

Modern machines ensure precision and consistency

Full Traceability

Each batch is recorded and traceable

Quality First

Stable performance and customer satisfaction

INSPECTION & TESTING CAPABILITIES

Inspection & Testing Capabilities

Advanced inspection systems ensure dimensional consistency, hardness control, surface integrity, and full production traceability across every batch of precision steel bearing balls.

01. Laser Diameter Measurement

High-precision diameter measurement to ensure tight tolerance control.

02. Roundness & Sphericity Testing

Accurate roundness and sphericity inspection to guarantee ball geometry consistency.

03. Hardness Testing

Rockwell and Vickers hardness testing for material performance and heat treatment control.

04. Metallographic Analysis

Microstructure analysis to verify material quality and heat treatment effectiveness.

05. Surface & Roughness Inspection

Surface finish and roughness measurement to ensure optimal performance and durability.

06. Crush Load & Vibration Testing

Crush load and vibration testing to validate product reliability and strength.

Diameter

Diameter Tolerance

±0.001mm Accuracy

Roughness

Surface Roughness

Ra 0.02μm Detection

Sphericity

Sphericity Control

≤ 0.25μm Precision

Hardness

Hardness HRC / HV

HRC 20-60 / HV 100-1000

Structure

Metallographic Structure

Grain Size & Inclusions

Load Limit

Crush Testing Limit

Up to 5,000 kgf Capacity

Batch Log

Batch Traceability

Full Logs & Lot Records

All inspection equipment is regularly calibrated. Reports and certificates are available for every lot upon request.

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TECHNICAL RESOURCES

Technical References

Steel Ball Standards

Detailed technical data including dimensional standards, grade specifications, and international requirements.

View Standards

Size & Specification Charts

Comprehensive weight, diameter, and tolerance charts for carbon, chrome, and stainless steel balls.

View Charts
500T
Monthly Supply

Consistent Quality & Supply

Stable batch-to-batch quality

Rigorous internal controls ensure every production run meets established benchmarks.

Reliable delivery & planning

Strategic manufacturing locations ensure efficient logistics for global industrial partnerships.

Long-term industrial stability

Consistent performance documentation for high-end critical applications.

Certification Standards Technical Parameter

SDBALLS has a quality laboratory that can be used for quality control of mass production projects. The characteristic parameters specified by international standards, such as heat treatment, hardness, tolerance, roundness, roughness, crushing load, etc., can be measured and inspected strictly for each production batch.

We can also provide PPAP, 100PPM and other QC reports. For other special tests and reports required by customers (such as raw material chemical analysis, salt spray testing, ROHS certification, etc.), we can provide samples reported by third party testing institutions. Ensure and guarantee the best quality. Our test equipment is regularly calibrated by accredited test laboratories.

Our procedures ensure high quality products, on time delivery, and our continuous improvement has been ISO 9001 certified.