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MATERIALS TESTING

Portable Calibration Unit

PAT Adhesion tester portable calibration unit in boxCalibration unit designed for calibrating and checking the accuracy of the PAT adhesion testers.  (With adaptors other makes of pull-off testers can also be checked).

 

Portable calibration unit for PAT hydraulic adhesion tester from DFD Instruments
Technical Data 
Calibration Range: 0-17MPa on 3.14cm² area (5.3kN)
Accuracy: Within 1% if full scale
Instrument weight: 2.4 kg
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ASTM-C633 jig

ASTM C633 jig for thermal sprayed coatings: Precision adhesion testing from DFDTwo cylinders with Ø25mm/one inch diameter, one of which is coated with the sample coating, are glued together end-to-end and then pulled apart in order to measure the pull stress (measured in Newton/mm2 or psi) required to fracture the coating. 

The ASTM-C633 tensile testing jig is used with the PAT range of pull-off testers to perform pull testing in accordance with ASTM-C633.
(Study File 4)

 

Download a pdf-format Leaflet! (173kB)

 

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Glue Curing jig

Failure to glue the cylinders together absolutely concentrically will result in imbalance in the stress distribution over the tested interface between the two test cylinders with a resulting lower fracture value.

 Jig for heat-curing (in an oven) assembly of pairs of test cylinders glued together.

This jig will not only ensure a 100% concentric joint but also ensure that the glue is evenly spread between the test cylinders.

 
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Shear Testing Jig

Jig for testing a coating in shear mode, i.e. pulling the test element sideways parallel to the substrate until fracture occurs.  Shear testing jig for adhesion and bond testing of thin and thich films

Principle of shear testing for tensile strength test equipment from DFD Instruments

 

DFD Shear Test Principle Illustration 

A support jig (J) is places over the edge of the test panel (B) to form the foundation for the tensile testing head (H).  The pull force is transferred trough a solid angle adaptor (A) to remain perfectly parallel to, and in line with the test panel's surface (S).  The test element (D) is securely fastened to the adaptor to prevent misalignment during pull force increase.

 

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