Hoffmann scratch hardness Tester

The Hoffman scratch hardness tester uses a spring-loaded stylus to move at a constant speed on the material surface, evaluating the material's scratch resistance based on the scratch width or load value. It is used for surface hardness testing of coatings, plastics, etc., reflecting the adhesion and wear resistance of the coating.
Selection
When selecting, consider matching the hardness range of the material to the instrument's measurement range, and ensure the coating thickness is greater than the scratch depth. The microscope's resolution for observing scratches should be clear, and the spring load accuracy must be checked. The environment should be free from vibrations, and the operating mechanism needs to be smooth.

Instruments

Hand crank type is easy to operate, load 1000g +/- 1g, scratch speed about 1mm/s, test angle 45 °, standard 6B-6H pencil, in line with a number of international standards, through the pencil Hardness grade to accurately evaluate the scratch performance of the paint film.

$ 325.00

Using digital touch screen control, the test speed is adjustable from 0-40mm/s, the load range is 0-4000g, the minimum increment is 50g, and it is equipped with a variety of weights and special scribing needles to accurately determine the film scratch resistance performance.

$ 945.00

Using electric Dial design, the scratch length can reach 60mm, the load range is 0-2000g, and the physical characteristics of the coating are characterized by the anti-penetration ability of the scribing needle.

$ 554.00

The pencil scratch method is used to test film Hardness, and the three-point contact design always guarantees a 45 ° angle, which meets the GB6379 standard and is suitable for film Hardness detection in laboratories and construction sites.

$ 138.00

Control system using servo motor, scratch speed 254mm/min, weight free lifting, ensure that the needle parts accurately fall on the workpiece, to achieve automatic scratch and zero operation.

$ 3785.00

Equipped with Φ 1mm, Φ 0.75mm, Φ 0.50mm three probes and 0-30N spring pressure, using wheel handle design, can be quickly measured in plane and curved surface, no maintenance and anti-corrosion.

$ 2054.00

Using 0.5mm tungsten carbide tip, the spherical test point can scratch 2000 90mm long scratches without damage after durability test, the design is comfortable and stable, and it is suitable for regular interval scratch operation in corrosion test.

$ 587.00

The scribing needle is used to act vertically on the film, the load range is adjustable from 0-2000g, the minimum increment is 50g, and the diaMeter of the steel ball is 1mm, which can accurately determine the minimum weight required to cut the paint film.

$ 444.00

Hardness of the lens surface, outstanding scratch resistance, excellent anti-fog effect, in a special working environment to maintain a clear field of vision, protection wavelength 100-400 nm ultraviolet.

$ 93.00

Steel ball diaMeter 1mm needle, load range 0-2000g, through the minimum load of the film to accurately determine the coating resistance to penetration, traverse speed 30-40mm/s to ensure the test Stability.

$ 641.00

Adopt 45 ° test angle and adjustable load system, the test platform traverse speed 0.5-10 mm/s adjustable, equipped with LCD display real-time monitoring, to meet the needs of accurate coating Hardness detection.

$ 619.00

Made of tungsten, with a total length of 17-18mm and a needle diaMeter of 1mm, it has excellent wear resistance performance and accurate scratch testing ability.

$ 280.00

The four-bar structure ensures a constant 45 ° test angle, is equipped with a three-speed test load and a standard Chinese pencil set, and the test bench supports multi-directional movement of 120x80mm samples, allowing scratch detection to be completed in any direction.

$ 283.00

The device moves the needle at a speed of 1.35mm/s, with a load range of up to 20N, which can evaluate the scratch resistance of coatings, and the voltMeter indicates substrate contact, supporting variable load testing.

$ 10211.00

The three-point contact structure is used to ensure stable sliding, the test angle is fixed at 45 °, and the 500/750/1000g adjustable load is equipped. The coating Hardness is accurately judged by the scratch depth of different Hardness pencils.

$ 136.00

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