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Big Daishowa's outstanding tool development relies on cutting force measurement technology from Kistler

Application Cases

The role of the bolt is to tighten, and it is conceivable that the preload (clamping force) is the most important measurement parameter. However, the pre-tightening force can not be directly measured like torque. It can only be measured by indirect method. The measuring method is also varied. The traditional method includes strain gauge method and washer sensor method, while ultrasonic wave is used to measure the pre-tightening force compared with other methods. The method does have many advantages, and can achieve non-destructive measurement, real measurement, information preservation, and cost saving.
Practice and theory are the left and right legs of human knowledge learning. Recently, Xiao Yan discovered that the left leg of the domestic fastening industry has become more and more sturdy, but the right leg is somewhat thin, and the theory is more or less lacking, including Xiao Yan himself. It's time to arm yourself with theory, and there is a book that will hold you armed.

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Handling Systems for Perfect Measurements under Challenging Conditions

Schatz handling systems are used to test bolted joints so that the test specimen can be analyzed directly under real application conditions

System Structure

System StructureThe results that are obtained must not be falsified – especially if installation conditions at the fastening position on the component under test are challenging, e.g. in the chassis area or the vehicle's engine compartment. To ensure that this does not happen, the system must not only feature high stiffness but must also offer the desired flexibility



For this purpose, a handling system is used with degrees of freedom that can be fixed electropneumatically: a swivel gear that can be manually adjusted and fixed, with a spindle changing unit, is mounted on the system. The spindle changing unit device allows changing of the drive unit to meet the test requirements in each case. The torque/rotation angle sensor that introduces the tightening torque into the test specimen via a suitable tool is adapted on the drive unit with the help of a sensor changing unit.

Key Data

  • Standard torque range up to 1.000 N∙m
  • Tests on original components
  • Flexible structure ensures easy, barrier-free access to the test specimen
  • Multiple drive units on one system are possible thanks to the spindle changing unit


  • Measurement of friction coefficient with additional adaptation
  • Connection to a vibration test bench
  • Ultrasonic measurement system captures the clamping force by measurement of elongation of the bolt
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