1. Test anvil for rebound hammer is a necessary calibration tool for Langry rebound hammer calibration.

2. The parts of the testing anvil are made of high-quality steel and high-quality tool steel. The fitting surface of the anvil core and the anvil body (Morse taper No. 4) is finely ground and the Rockwell hardness of the anvil core surface is HRC 58-62.

3. Generally, the testing anvil is placed on the horizontal plane with greater rigidity to calibrate the rebound hammer. The rebound hammer is used to conduct the rebound test vertically or horizontally to calibrate the calibration value of the rebound hammer.

4.GZII-80 The average calibration value of N-type concrete rebound hammer (2.207J) is [R] = 80±2;

GZIII-60 The average calibration value of an N-type concrete rebound hammer (2.207J) is [R] = 60±2;

GZIIV-40 The average calibration value of an N-type concrete rebound hammer (2.207J) is [R] = 40±2;

5. The testing anvil is used as an inspection tool. After a 5,000 -- 8,000 times bounce test, the anvil core and anvil body can be polished and leveled on the surface  grinding machine for reuse.However, the hardness of the anvil core shall be maintained HRC 58-62, otherwise, it shall not be used again.

6. The testing anvil is usually kept in a dry and dustproof place to prevent corrosion. The test surface shall not be knocked against at will in order to ensure the standard state of the inspection tool.