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Specification

  • Plunger: Applies pressure for hammer rebound
  • Body: Aluminum; with indicator scale
  • Rubbing Stone: Prepares test surface
  • Accuracy: Within 15 %
  • Weight: Net 3 lbs. (1.4 kg)

Accessories and Spares/Consumables

Type Product Name Product Code Standard Code
Accessories NW Rock Cradle 77-0480 NA Visit Page

This lightweight and portable impact hammer is used for rock classification tests. The hammer is similar to a device used for many years for strength classification tests of mass concrete. Cylindrical cores, usually NW size, are held in a horizontal position and the hammer mechanism impacted against the core to obtain rebound readings. A series of readings is taken along the length of the core to get the average rebound number.

Standards: ASTM D5873, EN 12504-2, ASTM C805

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