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The Gibitre centering device, compatible with Gibitre’s Drive series automatic hardness testers, enables rapid hardness testing on O-rings and technical components with a cord diameter between 0.6 and 10 mm and an inner diameter of up to 200 mm. Designed to make measurement simple and repeatable, it eliminates the uncertainties of manual positioning and speeds up each test.
The sample is inserted between the two positioning rods; the distance is adjusted using the knob according to the chord of the piece to be measured. The integrated dial gauge immediately displays the set value, ensuring consistency between tests. The clamping clip maintains the correct positioning even for curved parts.
The magnetic attachment to the standard instrument base plate allows for installation and removal in just a few seconds, making the transition between different formats quick and seamless. The result is faster and more reliable measurement on different materials and geometries, with tangible benefits in terms of productivity and quality of results.

The centering device enables quick hardness tests to be carried out on O-rings and technical article with chord between 0.6 and 10 mm and Inner Diameter up to 200 mm.
To perform the test, the part is placed between the two positioning rods.
The adjustment knob allows the distance between the two rods to be set according to the chord of the o-ring or workpiece to be measured.
The distance between the rods is displayed on the centesimal dial indicator built into the device.
The retaining clip allows correct positioning of curved workpieces to be maintained
The device attaches to the standard instrument plate by magnetic fastening, which allows for quick installation and removal.



The device is equipped with two vertical rods, a centesimal dial gauge that indicates the distance, and an adjustment knob that allows the distance to be adjusted according to the chord of the O-ring to be measured.
The user must:
- Set the distance between the rods to coincide with the chord of the O-ring
- Place the part to be measured in the middle of the rods
- In case the part to be measured is curved, the adjustment clip allows the part to be kept pressed on the device plate.
In the case of testing pieces with the same diameter, the operator simply needs to replace the pieces without making any further adjustment.



The device is applied to the standard plate of the instrument by magnetic fixing which allows its rapid installation and removal.





It is possible to perform hardness tests on flat specimens without the need to remove the device.
To meet this need. the device is equipped with a lever that allows you to lower the rods for O-ring placement so that you have a flat surface on which you can place your flat specimens.

























