Trade name
Resistograph 4453-S by RinnTech
Technical description

The cutting resistance test is performed using a flexible tungsten drill with a diameter of 1.5 mm with an upper cutting edge with a width of 3.0 mm, which is drilled into the tested wooden element at a constant rotational speed and feed rate. The torque required to maintain a constant rotational speed and feed corresponds to the cutting resistance of the wood. It is recorded and plotted with high resolution in relation to the depth of the borehole.

Conditions for providing infrastructure

Work only through an authorized employee of the Department of Geomechanics, Civil Engineering and Geotechnics.
Order/contract/other form of cooperation upon agreement

Type of accreditation / certificate:
Not applicable
Access type
Research capabilities

The device allows you to register changes in cutting resistance. The decreases in the charts are associated with lower resistance, and thus lower density (e.g. related to biological corrosion, voids, cracks), which require less torque to cover the same distance by the drill. The high resolution of data recording allows the observation of density changes also within one annual increment

Last update date
Aug. 23, 2023, 7:46 p.m.
Year of commissioning
Measurement capabilities

The drill feed speed is 40 cm/min and the resolution is 1/100 mm (dedicated to testing medium-density wood). The maximum measuring length is 44 cm.