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Home  >>  Products  >>  Adhesion  >>  760N Cupping Tester
760N Cupping Tester

PA-760 Cupping Test Machine

The 760N Cupping Tester tests the elasticity and adhesive qualities of lacquers, paints and other protective coatings applied to a metal substrate. The test method is described in BS 3900 E4, BS EN ISO 1520, DIN 53166, DIN 53232, JIS K5600-5- 2 and JIS B7729.

The standards call for a hemispherical indenter of 20mm diameter made from hardened polished steel. The indenter is applied under pressure to the uncoated side of the test panel, concentric with the indenter is a corresponding die. As the test panel is deformed the coated surface is kept under observation for any change in surface coating, i.e. cracking, loss of adhesion.




  • New improved ergonomic design for ease of use and viewing of test
  • Two-handed crank operation
  • Precision gearbox providing linear force transmission
  • 10 crank revolutions = 2mm ball travel
  • Magnetically retained 20mm Chrome Steel Ball
  • Reproducible results guaranteed irrespective of material coating thickness
  • LCD displaying indent depth to 0.01mm resolution
  • Pivotal integrated x 2.5 illuminated magnifier
  • Measuring system range 0—20mm
  • Accepts standard 150mm x 100mm (6” x 4”) steel test panels up to 1.25mm thick
  • Capable of cupping 3mm thick aluminum test panels
  • Auto switch off


Technical Data

Technical Data
Dimensions: W(incl. handles) 420mm x D 350mm x H (incl. Magnifier) 500mm
W(incl. handles) 16.54” x D 13.78” x H (incl. Magnifier) 19.69”
Weight: Weight 16 Kg (36 Lbs)


Test Procedure

The following procedures are for guidance only, for more detailed explanation refer to method defined in
relevant national standard.
  1. Predetermined Depth (Go/No Go)
    The following procedure shall be carried out on two separate test panels (if the results differ, additional tests shall be made).
    Hold test panel firmly between the retaining ring and die with the coating towards the die and with hemisphericalend of the indenter in contact with the test panel (zero position of indenter). Adjust panel untilcentral axis of the indenter intersects the panel at least 1.38” (35mm) from each edge.

    Advance the hemispherical end of the indenter into the test piece at a constant rate of approximately 0.2mm/s until the specified depth is reached, i.e., until the indenter has travelled this distance from the zero position.

    Using normal corrected vision or, by agreement, a magnifier, examine the coating of the test panel for cracking and/or detachment from the substrate. When removing test panel, first slacken the indenter handwheel to relieve pressure, then unscrew the upper clamping wheel to free the panel.

    NOTE 1. If a lens is used, it is essential to mention this fact in the test report and to avoid misleading comparisons with results obtained using normal corrected vision only.
    NOTE 2.The test results shall not be regarded as valid if the substrate shows signs of cracking.

  2. Minimum Depth Required to Cause Failure
    Carry out the procedure given in Test 1 until, using normal corrected vision (or by agreement, magnifier) a crack is first observed on the surface of the coating and/or the coating begins to become detached from the substrate**. Stop the indenter at this point and measure the depth of indentation to the nearest 0.1mm, i.e., the distance travelled by the indenter from the zero position. Confirm the result by repeating the determination on a fresh panel (if the results differ, further determinations shall be made).

    ** In order to facilitate accurate observation of the end point , it is permissible to reduce slightly the rate of advance of the indenter when approaching the expected end point (determined, in a preliminary test.)



The test may be carried out using one of two procedures - ‘Predetermined depth (go/no go)’ or ‘Minimum depth required to cause failure’. The methods are detailed under the general procedure below.


Test Panels

The recommended test panels are rectangular of not less than 70mm square (instrument capacity 104mm wide) of burnished steel with a thickness of not less than 0.3mm to a maximum of 1.25mm. Testing using a maximum test panel thickness of 1.25mm and a tensile strength not exceeding 280N / mm2 (MPa) a deformation of 7mm can be achieved.



Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Item Number Item Prices
PA-760N Cupping Test Machine, complete $5,637.00


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