Model 249-Smart Lineartester / 249-Smart XL Lineartester

Scratch Hardness Testing

Multi-function device, scratch, rub, wipe, chemicals, with an electromotive drive; scratch length single stroke 50 – 110 mm; double stroke 35 – 150 mm (without test tools)

The optimised scratch hardness tester LINEARTESTER 249 Smart is intended, in addition to its original purpose of application, i. e. to establish the ability of a surfaces to resist damage by scratching, also for several other tests: Scribe/Scratch tests; To and frocycle abrasion tests; Crockmeter tests; MEK tests; tests determining the resistance against solvents in general or wipe test, respectively.

The LINEARTESTER 249 Smart is a tabletop device that is operated via a capacitive LCD display. The electromotive drive ensures a uniform forward motion of the slide. The test tool is lowered and lifted automatically when scratch/scribe tests are carried out. A multitude of different test tools are available (see table in the technical description below). The tools marked with (*) are made of Tungsten Carbide Steel, additionally covered with an extremely hard layer. Due to this layer’s “golden” appearance, any worn parts are visually very easy recognizable because the Tungsten Carbide Material under the “golden” layer has a distincly different color. With the optional available universal adapter set (see last page of the technical description) even also several user-specifc tool inserts can be used.

Principle of the Test: The test panel is fixed onto a mobile slide by means of clamping rails. Above this slide and held on two metal pillars is a reciprocating beam bedded in a free-moving manner and carrying the adequate test tool as well as a weight. The required scratching force in the range of (0.5 to 20)N is set by moving the weight along the reciprocating beam, making use of a setting scale (an additional load weight of (1 to 40)N is optionally available). The testing machine is equipped with a 4-position height adjustable load arm device with standard height of about 10 mm (+20/+40/+60 mm). To use the vertical adjustment, a set of sample clamping pieces are also required (Order No. 21010232). Operation (settings) is via a capacitive LCD display. To start a scratch/scribe test, the test tool is lowered onto the specimen when moving forward initiating the scratching process immediately. The test panel can be moved sideways so that a series of scratches can be carried out side by side with different force settings. Due to a ruler integrated in the slide plate, an uniform distance between the scratches can be achieved very easily. When testing insulating coatings on conducting substrates, an electric recognition of the through-scratching offers an additional security for setting the scratching force. For abrasion tests, crockmeter tests, MEK or wipe tests the test movement is carried out with the tool lowered onto the specimen, in preset cycles to and fro. For this, the guide plate has to be removed from the slide plate. The test speeds are freely adjustable. The LINEARTESTER Smart is equipped with variable stroke lengths.

Washability and Scrubbability Tester 494MC

Operation via keyboard and display adjustable stroke rate and stroke path Parameter storage for 20 test cycles up to 3 tests simultaneously.  For the assessment of the washing and scrubbing resistance as well as cleanability of dispersion paints (specifically ”wall paints”)., The wide range of its adjustable parameters allows also some further tailored/customized testing matters (for example for testing cleaning agents/solutions, etc.) as well. In the above standard applications a matt black PVC foil will be coated, and – if required – soiled in a defined manner. After clamping into the device it will be exposed under the influence of a washing liquid the stress of the moving scrub body.DIN 53 778-2 ASTM D 2486 DIN EN ISO 11998

Original Taber Abraser 352

The TABER® ABRASER 352 D (Platform), with its attractive and modern design, is a robust tabletop unit. The precise control and drive elements are located in a sturdy aluminum housing. Easy operation is via LCD touch screen, with functions such as abraser status, visual reference of completed test, cycle/time switching (completed or remaining), programmable pause interval, language selection and much more. The TABER® ABRASER Model 352 D (Type 1750) has two specimen holders for performing abrasion tests.

Purpose and application: Resistance to abrasion is one of the most important mechanical properties of surfaces. Among the methods used to test abrasion resistance, working with this unit is the most common and widely used method. Numerous national and international standards make explicit reference to this test instrument. The Original TABER® ABRASER can be used to perform abrasion tests on paintwork and other coatings, such as rubber, paper, leather, ceramics, textile fabrics and metals. This device is used in research and development as well as in production and quality control.

Principle of the test: The abrasion is caused by two friction rollers which act with a defined force on the rotating specimen holder to which the specimen is attached. An essential feature of these abrasion tests is the X-shaped grid.  In acc. to EN 13329, NEMA LD 3-2000, EN 438-2, ISO 4586-2, NALFA LF-01