Introduction:
The CST-50 impact specimen notch projector is designed and developed according to the requirements for impact specimen notches in GB/T229-2020 "Metal Charpy Pendulum Impact Test Method" and ASTM E-23. It is a special optical instrument for checking the processing quality of Charpy V-type and U-type impact specimen notches. The instrument uses an optical projection method to enlarge the V or U-type notch contour of the impact specimen to be tested and project it onto the projection screen. It is compared with the standard sample diagram of the impact specimen V and U-type notch on the projection screen to determine whether the notch processing of the impact specimen being tested is qualified. Its advantages are simple operation, intuitive inspection and comparison, and high efficiency.
产品特点：
1. It can meet the V-shaped and U-shaped notch requirements of the national standard GB/T229: V-shaped specimen 45±2°, depth and width 2±0.07mm. U-shaped specimen arc diameter 1±0.07mm);
2. It can also meet the V-shaped and U-shaped notch requirements of the international standards ASTM E23 and ISO14: V-shaped specimen 45±1°, depth and width 2±0.025mm. U-shaped specimen arc diameter 1±0.025mm.
