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Thread testing

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Accurate thread testing is becoming incre­asingly important in series production.

Thread testing

Our thread testing techno­logy is built upon the MultiPro 3G control system and is speci­fi­cally designed for automated testing of both internal and external threads using thread gauges when paired with our dedicated thread testing nutrunner.

In view of the incre­asing importance of precise thread testing in modern series produc­tion processes, we have developed this technology.

A new dimen­sion in thread testing is opened up by using the DSM test nutrunner with changeable thread gauges in combi­na­tion with intel­li­gent measu­re­ment technique. This not only enables automated and stable testing proce­dures but also compre­hen­sive documen­ta­tion of the entire process.

Thanks to the modula­rity of our nutrunner and control system, the equip­ment can be flexibly adapted to indivi­dual requi­re­ments. Whether it’s the nutrunner itself, the low-backlash output adapted to it, an attachable position sensor, or the execu­tion of the thread gauge – our inspec­tion system enables the efficient testing of all threads in your production.

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By the way:

The optional monito­ring function can also be used in conven­tional tightening processes, where it is possible to measure and analyse the screw depth in addition to the torque and angle of rotation and use it as a preset parameter.

The benefits of our thread testing solution

  • Compact design, based on standard tightening system.
  • Flexible test strategy with up to 99 possible test steps.
  • Gentle screw-on pressure thanks to spring elements (optional adjustable).
  • Storage of up to 128 diffe­rent test programmes.
  • Optional: Special test gauge holder to compen­sate small alignment errors by decou­pling the gauge from the axis of rotation.
  • Optional: The automatic changeover unit allows for the automatic switching of the inspec­tion gauge or, in case of a malfunc­tion, its disconnection.

Data sheet

Here you will find the corre­spon­ding technical data sheet for our Threat test nutnunner with a example sequence. You can view or download the document directly in the browser.

Data sheet Thread testing (PDF, 992KB)

Meaning (Video­clip)

In the follo­wing german explana­tory video you will learn why thread testing is so important in the indus­trial assembly of assem­blies and what solutions DSM offers for this.

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Calibra­tion

Did you know that you can have your devices calibrated directly in-house?

DSM calibra­tion laboratory

Tightening Technology: Reliable top-quality technology

Frequently Asked Questions (FAQ)

1. What is automatic thread testing?

Automatic thread testing is a computer-controlled process that inspects threads for dimen­sional accuracy, pitch, depth, and defects using sensors, cameras, or motorized gauges. It ensures consis­tent quality in threaded compon­ents without manual intervention.

2. What are the benefits of automatic thread testing compared to manual inspection?

Automated systems offer faster inspec­tion speeds, higher repea­ta­bi­lity, reduced human error, and compre­hen­sive data logging for quality assurance. They enable 100% inspec­tion in high-volume produc­tion environments.

3. Which thread features can be checked automatically?

Key features include pitch, flank angle, major and minor diame­ters, thread depth, concen­tri­city, and the presence of burrs or conta­mi­na­tion. Advanced systems can also detect incom­plete or damaged threads.

4. How does an automatic thread testing system work?

The system uses mecha­nical or optical sensors to scan the thread geometry and compares the measu­re­ments to prede­fined tolerances. Results are processed in real-time, often with integrated feedback to the produc­tion line.

5. In which indus­tries is automatic thread testing commonly used?

It is widely used in automo­tive, aerospace, mecha­nical enginee­ring, and medical device manufacturing—anywhere high-precision threaded compon­ents are critical.

6. Can automatic thread testing systems be integrated into existing produc­tion lines?

Yes, many systems are modular and can be integrated inline or offline, with inter­faces for MES or ERP systems to support tracea­bi­lity and process control.

7. What techno­lo­gies are used in automatic thread testing?

Techno­lo­gies include motorized torque sensors, optical inspec­tion with cameras, laser measu­re­ment systems, and force-displa­ce­ment sensors for functional testing.

8. How does automatic thread testing contri­bute to quality assurance?

It enables early detec­tion of defects, ensures compli­ance with speci­fi­ca­tions, reduces rework and scrap, and provides documen­ta­tion for audits and certifications.

Note: This FAQ is intended for general infor­ma­tional purposes and does not replace perso­na­lized advice. For specific inqui­ries, please consult a quali­fied specialist.

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