Direct shear test on rocks

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Standards ASTM D5607 – ISRM
Designed to determine stability and skid resistance in rocks measuring a maximum of 115 x 125mm, or specimens of Ø 102 mm. The device consists of a shearing box with a diagonal section. The upper half has a vertical piston to apply load and the lower half has two horizontal pistons for reversible cutting action. The pressure is applied to the pistons by manually operated hydraulic pumps and the load is displayed on two Bourdon pressure gauges.

Maximum dimensions for irregular samples: 125 x 110 mm.
Maximum dimensions for cylindrical specimens: Ø 102 mm.
Horizontal displacement: gauge measuring 25 x 0.01 mm.
Dimensions: 600 x 250 x 460 mm.
Weight: 46 kg.