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RockSchmidt Rock Testing

Article No. 11776

Rockschmidt Type N

  • RockSchmidt Rock Testing Type N
  • Standard impact energy, 2.207 Nm.
  • Recommended for field work.
  • For core testing ISRM recommend that cores should be at least moderate strength (> 80 MPa) and at least T2 size (= 84 mm).

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$2,883.00 excl. taxes & shipping cost


  • The RockSchmidt Rock Tester is world's most advanced rebound hammer, with unmatched dispersion characteristics, durability and measuring range has now been fully adapted for rock testing. It is a portable instrument made for the field assessment of rock properties.
  • Impact Angle Independence: The rebound value is independent of the impact direction.
  • Optimized for Field Work: Tighter sealing against dirt and dust intrusion for longer life. Significantly lighter and more ergonomic than the classic Schmidt hammer. A large number of readings can be saved and downloaded later to a PC.
  • Preset Statistics: Statistics methods recommended by ISRM and ASTM are implemented into the hammer for automatic calculation of the rebound number. The option is also there to define a user specific statistics method.
  • Unconfined Compressive Strength: ISRM recommends a correlation between UCS and the rebound value based on the formula UCS = aebR (where R is the rebound value). A correlation in this format may be defined in the software and downloaded onto the RockSchmidt.
  • Young's (E-) Modulus: ISRM recommends a correlation between elastic modulus and the rebound value based on the formula Et = cedR (where R is the rebound value). A correlation in this format may be defined in the software and downloaded onto the RockSchmidt.
  • Weathering Grade: Impacting on the same location twice can be used to correlate to weathering grade. The ISRM recommended method has been included in the firmware.

Technical Attributes

  • Data
    Impact Energy:2.207 Nm0.735 Nm
    Dimensions of Housing:55 x 55 x 250 mm
    (2.16" x 2.16" x 9.84")
    Weight:570 g
    Max. Impacts Per Series:99
    Memory Capacity:Dependent on length of test series. Example: 400 series of 10 impacts
    Display:17 x 71 pixel, graphic
    Accumulator Duty:> 5000 impacts between charges
    Operating Temperature:0 to 50°C (32 to 122°F)
    Applications:Geomorphological applications which investigate the bulk hardness properties of a rock outcrop, Prediction of weathering grades, Relative dating of landforms such as moraines and rock glaciers, Prediction of penetration rates for tunnel boring machines and rotary drum cuttersTesting on weak rocks, porous rocks and those with thin weathering crusts
    Applications for Both N/L:Correlation to Unconfined (or Uniaxial) Compressive Strength (UCS), Correlation to Young's Modulus
    Testing on Blocks:> 100 mm thick
    Testing on Cores:N: ≥ 84 mmØ
    L: ≥ 54.7 mm Ø

Delivery Content

Battery charger with USB cable, DVD with software, carrying strap, grinding stone, documentation, factory certificate and carrying bag.

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