Technical parameters: 
1. Specimen size: ф50×50 (mm)
2. Steel ball specifications: ф50mm. weight 510g
3. Falling ball height: 1000mm
4. Sieve mesh hole specification: 10 × 10 (mm)
This instrument determines the toughness of the sand by measuring the crushing index of the sand specimen. Toughness is the resistance of the sand to damage, it represents the amount of yak work when the specimen is broken, is a comprehensive reflection of the strength of the specimen, the factors affecting the toughness of the sand are; effective clay content in the sand. Dust content. Humidity. Additional material content, etc.