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Scratch Hardness Tester LINEARTESTER

Scratch Hardness Tester LINEARTESTER
Scratch Hardness Tester LINEARTESTER
Product Code : 249
Brand Name : ERICHSEN
Product Description

“ERICHSEN” Scratch Hardness Tester LINEARTESTER

Model : 249

Purpose and Application
The optimised scratch hardness tester LINEARTESTER 249 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 fro-cycle abrasion tests
- Crockmeter tests
- MEK tests, tests determining the resistance against solvents in general or wipe test, respectively.
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
To start a scratch/scribe test, the test tool is lowered onto the specimen when moving forward initiating the scratching process immediately. The optionally used guide plate lifts the tool up, when the slide with the sample plate moves back.
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.
There are three fixed as well as one freely programmable test speeds available.
The LINEARTESTER 249 is a tabletop unit. 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. 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 even also several user-specifc tool inserts can be used.
Technical Data
Dimensions (L x W x H)                                    580 mm x 280 mm x 210 mm
Specimen dimensions max.                               150 mm x 210 mm (DIN A 5)
Power supply                                                    (100 - 240) VAC, (47 - 63) Hz
Net weight approx.                                            13 kg
Scratching force                                                (0.5 – 20) N
Medium test speed                                            22/35/200 mm/s (fixed)
(20 – 200) mm/s programmable
Length of cycle                                                   60/110 mm (with/without guide plate)


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Contact Details
132, Room No.23, Princess Street, Govind Building, 2nd Floor, Kalbadevi Road,Mumbai - 400002, Maharashtra, India
Key Personnel
Mr. Praveen H. Bachhawat (Managing Director)