The Stud Inspection Manipulator (SIM) is designed for in-service inspection of studs and bolts from the bore.

With its flexible modular design SIM can also be used for a number of inspection applications simply by changing the mounting flange and probe lances.

The SIM is attached to the face of a stud or bolt and a probe lance with an integral probe head is passed down the central bore to provide a full-length scan of the stud or bolt. Probe lances incorporate ultrasonic or eddy current probes to perform helical or raster scans.

The simple set-up procedure of the manipulator makes it quick and easy to perform an inspection, then move to the next stud.

The SIM scanner is a popular choice in the power industry, due to its reliable operation and results and ability to reduce downtime. Customers tell us that by using the SIM, they have been able to carry out inspections in-situ, and on previously inaccessible bolts.



Power Industry – SIM is the ideal inspection solution for:

  • Studs and fixings with central heater holes, typically used for turbine casings
  • Nuclear vessel and pump flanges
  • Generator radial holes
  • Small diameter bores in forgings such as gas turbine rotors


  • Hollow rail axles


Safety Features

The Stud Inspection Manipulator is inherently safe. All exposed materials are low in halogens and sulphur. It is easy to assemble and remove and can operate unattended during scanning. Any parts that need to be released during assembly or dismantling are tethered or captive.

Both axes will not backdrive under their weight. It cannot be connected incorrectly and the motors cannot be energised without first connecting the limit switches and encoders.

In the event of a temporary loss of service, the inspection can be restarted without operator intervention at the inspection site. If services are permanently lost, it is still possible to remove the SIM.

Request to Quote

Send us a request to quote by selecting the options required. A member of our team will get back to you as soon as possible with more information.

The Stud Inspection Manipulator (SIM) is designed for in-service inspection of studs and bolts from the bore.

Standard Kit

  • Scanner body
  • Lances and Mounting Adaptors (customised to your application)
  • 10m Cable and connections (to motor controller)
  • Hardigg type transport crate (can be changed for 3 off Pelicase)


SIM Scanner - Stud Inspection Manipulator


  • Operates in areas with limited access
  • Can perform helical or raster scans
  • Probe lances incorporate ultrasonic or eddy current probes
  • Standard stroke length is 870mm – other lengths are available
  • Probe lance sizes 16mm to 95mm diameter – other diameters are available
  • Probe lance extensions allow the inspection of longer bores
  • Overall length is only 205mm more than the maximum stroke length
  • Width 120mm
  • High immunity to external noise, essential for all inspections
  • High temperature options available


  • Can reduce plant down-time with in-service inspections
  • Offers exceptional performance when measuring low amplitude signals
  • Set up in less than ten minutes
  • Customisable adaptations and mounting configurations available
  • Quick change lances between ultrasonic and eddy current inspections