Scratch Hardness Tester – Hand Operated

Presto’s Scratch hardness tester is an effective tool used to perform tests related to scratch resistance under a specified load. It can be used for diversified products like lacquers, varnishes, and paints. The tester is recommended mainly for the paint and plating industry and designed especially for small laboratories where continuous quality-control tests need to be conducted. Hardness can be explained as a material’s resistance to permanent deformation. In the coating industry, this measurement can be used to measure the resistance of the coating to scratch from normal wear and tear and also if the coating is fully protected.

The term Hardness is used to explain the various properties of the material, namely – Resistance to scratch & wear and Resistance to penetration. As per the requirements, these are different methods for measuring hardness. Some of them are used for measuring coatings, and others are used to test various bulky materials like plastics, metals, elastomers, and rubbers. Presto’s Scratch Hardness Tester is a suitable apparatus for carrying out the tests relating to resistance to scratch under a specified load. Tests are conducted either on a go/no go basic by testing at a single specified load on the needle or by increasing loads to determine the minimum load at which the coating is penetrated. Scratch Hardness Tester is used to test paints, varnishes, lacquers & similar products.

This lab testing instrument is most suitable for small laboratories and industries where repetitive quality control tests are carried out. This machine, which operates from a 220V 5OHZ AC supply, is encased with a cover enclosing the gears and other parts for operating the slide at a constant speed and the arm lifting mechanism. The needle arm is counterpoised and rigid to prevent whip or chatter at the needlepoint. A 1 mm needle-ended needle (normally supplied with each instrument) is held in a chuck at 90o to the test panel and can be easily removed for inspection and replacement. Weights providing increments of 100gm, 200gm, 300 gm, 500gm, 1kg. Mass is loaded above the ended needle.

With its latest and ergonomic design and easy-to-use functionalities, you will be able to test your specimen with ease. Tests are conducted either on a go/no go basic by testing at a single specified load on the Diamond Stylus tip or by increasing loads to determine the minimum load at which the coating is penetrated. PRESTO Scratch Hardness Tester is designed as per standard ASTM G171-03.

Whenever you are going to conduct the test, with the help of this lab testing equipment, then you should prepare the testing sample accurately. You can take a piece of the sample that the user needs to test of size 130 x 70 mm. Move the Resting lever down, so that the oscillating arm is held upward. Place the sample of the painted metal sheet over the rubbing platform and clamp it firmly. Once you place the testing sample accurately, then you can easily commence the test. Below we have mentioned some points that will help you to commence the test.

• Check end needlepoint should be fitted with a 90-degree angle.
• Move the resting lever up, the oscillating arm comes on the test specimen.
• Load needle arm with weights to determine the threshold of failure.
• Rotate the oscillating arm clockwise to start the oscillations.
• If a failure occurs, the needle will touch with the base plate a green light will illuminate.
• Remove sample for visual assessment of scratch.

In this way, you can easily test the specimen accurately. If you need any more information, you can easily consult with us.

Features of Scratch Hardness Tester – Hand Operated

• Hand operated oscillating arm with Teflon rollers for noise-free movement
• Highly accurate test results under uniform load and specified diameter.
• Equipped with Teflon rollers to minimize friction
• Uniform load by weights on Diamond Stylus tip for evenness in testing
• Firm holding of the Test sample by Steel Clamping pins
• Cam system for oscillating arm movement
• Instant braking system
• Light Indicator for sample failure notification

Technical specifications

• Size of sample: 130x70 mm
• Stylus Angle: 120 degrees ±5 degree
• Load on Stylus: 1 Kg, 500gm, 300gm, 200gm
• Length of travel of Stylus: 100 ± 8 mm
• Power: 220V, 50Hz, Single Phase
• Stylus Hemispherical: 200 Micron (±10 micron)
• Stylus Material: Diamond
• Material: Mild Steel(Outer Body)
• Finish: Powder-coated Havel Gray & Blue combination finish and bright chrome/zinc plating for corrosion-resistant finish
• Diamond Stylus tip: 1 Yes
• Dimensions: 665 x215 x 215 mm