Thread testing

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.

thread-test­ing-01-EN
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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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