Vision Measuring Machine for Fastener Industry: Sinowon OMM Solution

In the fastener manufacturing industry, the dimensional accuracy of screws, nuts, and washers directly determines assembly quality and operational safety. As industrial requirements for precision increase, traditional tools such as calipers and optical projectors often fail to meet the demands for high efficiency and high repeatability in Geometric Dimension Measurement.

Sinowon introduces its advanced Vision Measuring Machine (also known as OMM – Optical Measuring Machine or Video Measuring System), providing a complete Geometric Dimension Measurement solution for the fastener industry – from raw material inspection to finished product quality control.

Key Challenges in Fastener Inspection: Micro Features & Batch Control

Although small in size, fasteners require measurement of dozens of parameters, including major diameter, pitch diameter, minor diameter, flank angle, thread pitch, head height, head diameter, width across flats, hexagon depth, flatness, perpendicularity, and coaxiality.

Traditional methods relying on manual inspection or dedicated gauges present three major challenges:

• Low efficiency – One gauge fits only one specification; tooling changes are frequent
• Insufficient accuracy – Small thread or chamfer features are prone to operator reading errors
• Lack of traceability – Paper records cannot meet IATF 16949 or SPC analysis requirements

Core Advantages of Sinowon OMM / Vision Measuring Machine

The Sinowon SIG series fully automatic Vision Measuring Machine integrates a high-resolution color industrial camera, telecentric optical system, and intelligent edge detection algorithms to deliver non-contact, fast, and repeatable Geometric Dimension Measurement.

1. Multi-Parameter Measurement with One Program

With an auto zoom lens and ring/coaxial light, the Video Measuring System captures both contour and surface features in one click. The software supports automatic thread parameter evaluation, chamfer angle calculation, and arc fitting.

Geometric Dimension Measurement includes: length, diameter, step height, angle, roundness, and position tolerance.

2. Accurate Flatness & Form Tolerance Evaluation

Flatness of fastener bearing surfaces and washer surfaces directly affects the uniformity of locking friction. The SIG OMM uses laser-assisted focusing and Z-axis grating feedback to quickly scan multi-point height differences, automatically calculate flatness, and output a color deviation map. It also supports perpendicularity, parallelism, and coaxiality evaluation.

3. Batch Inspection with Automated SPC Output

Equipped with a motorized stage and pattern measurement function, the Vision Measuring Machine can inspect dozens of fasteners in one setup. The system automatically completes all Geometric Dimension Measurement tasks according to a pre-programmed path.

Results are saved to a database in real time, with automatic CPK calculation and X-bar R control chart generation – fully ready for SPC and quality traceability.

Typical Fastener Applications

• Threaded fasteners – Automatic thread profile extraction, pitch diameter calculation, and Go/No-Go judgment against standard databases
• Self-tapping screws / machine screws – Head under-radius, tail chamfer angle, and shaft straightness
• Washers & retaining rings – ID, OD, thickness, flatness, and parallelism
• Non-standard / custom parts – Multi-step diameter, step length, and symmetry

Why Fastener Manufacturers Choose Sinowon

• Cost-effective – Competitive pricing with accuracy and stability close to imported brands
• Easy to use – Drag-and-drop programming; complex part programs can be created within 10 minutes
• Customizable reporting – Export to PDF, Excel, or SPC formats to meet customer audit requirements
• Professional support – On-site setup and dedicated thread measurement templates to shorten the deployment cycle

Conclusion

As the fastener industry moves toward automation and continuous quality improvement, Sinowon Vision Measuring Machines (OMM / Video Measuring System) have become a standard solution in laboratory and production line settings for many leading fastener manufacturers.

Whether for routine Geometric Dimension Measurement or flatness and form tolerance evaluation, Sinowon delivers reliable, repeatable data to help you reduce costs and improve quality.

For more fastener measurement case studies and technical specifications, please visit the official Sinowon website:
www.sinowon.com