Scratch Hardness Tester TriForcePencil Model 293

Description

The TriForcePencil 293, enables the test to be carried out technically equivalent to Wolff-Wilborn and ensures that the specified force and angle remain constant throughout the test. Guidance of the instrument is easy and excludes manual influences of the pencil pressure.

The classic test according to Wolff-Wilborn performed with a test weight of 750 g originally. However, under consideration of the correct naming of forces, the test loads of 7.5N for this purpose has enforced.

The weight block of the TriForcePencil 293 is equipped with three pencil guides, which apply by the principle of leverage the appropriate test load on the pencil tip, according to their positioning.

Setting the correct height or the defined projection of the pencil out of the weight block, is easily & comfortably ensured by rotating the adjusting screw with distance tip.

Recessed handles on the wheel covers provide good support for the controlled blanking sliding the device over the surface to be tested.

The Scratch Hardness Tester TriForcePencil 293 is supplied in a plastic case. The package includes an assortiment of pencils with 17 degrees of hardness from 6B to 9H, a special sharpener and a sheet of emery paper.

Purpose and Application

The pencil method belongs to the group of scratch hardness testing instruments. This is a simple and quick method for testing the surface hardness of coatings with regard to stresses inflicted by scratching with sharp edges, or other rough surfaces.

It can also be applied during production, e. g. for coil coatings.

The equipment of the TriForcePencil 293 with three test loads ( 5 N / 7,5 N / 10 N ) instead of usually only one ( 7,5 N ) meets the increasingly possibility of variation of the test load for this type of testing even currently demanded in the Asian market.