40mm Grinding Ball, Sintered Corundum

40mm Sintered Corundum Grinding Ball for Planetary Mills

Essential for precise sample preparation in Fritsch Planetary Mills, this 40mm Sintered Corundum Grinding Ball works in conjunction with grinding bowls to achieve efficient particle size reduction. Grinding balls facilitate comminution through a combination of impact and friction as the mill operates.

Optimizing Your Grinding Process: The final particle size and grinding efficiency are significantly influenced by both the diameter and quantity of the grinding balls used. Larger balls, like this 40mm option, are generally more effective for initial coarse grinding or reducing larger particles, leading to a coarser final product. For optimal and consistent results, it is strongly recommended to use grinding balls of uniform size within a single grinding process to prevent uneven wear and inefficient milling.

Achieving peak grinding performance often requires empirical testing. Generally, increasing the quantity of grinding balls can significantly reduce milling times and produce finer particle sizes, up to an optimal loading point. To ensure dynamic grinding action and efficient energy transfer, the combined volume of grinding balls and sample should not exceed two-thirds of the grinding bowl's total capacity, leaving at least one-third free space.

Properties and Material Compatibility: Sintered Corundum (Aluminum Oxide, Al₂O₃) is an excellent choice for a wide range of applications due to its very high hardness, exceptional wear resistance, and chemical inertness. This material minimizes contamination, making it ideal for processing samples where metal contamination is unacceptable. With a density of 3.8 g/cm³, these balls provide effective grinding power.

These 40mm Sintered Corundum grinding balls are particularly recommended for grinding medium-hard to hard, brittle, or fibrous samples. This includes materials such as ceramics, minerals, glass, plant tissues, and certain pharmaceuticals. As a general rule, always select grinding balls and bowls made from a material harder than your sample to ensure efficient comminution and prevent excessive wear. While Sintered Corundum bowls can be paired with harder balls like Zirconium Oxide for very tough samples, always be mindful of potential cross-contamination when using dissimilar materials.

Key Features:

• Material: Sintered Corundum (Al₂O₃)
• Density: 3.8 g/cm³
• Hardness: Very high, ensuring excellent wear resistance
• Chemical Inertness: Minimizes sample contamination
• Recommended For: Medium-hard, hard, brittle, or fibrous samples (e.g., ceramics, minerals, glass, plant material)

Purchasing and Compatibility: This 40mm grinding ball is sold individually. Please note that grinding balls with a diameter of 3mm or smaller are typically sold in packs of 100 pieces. Grinding bowls, both Classic and Premium series, are essential accessories and must be purchased separately to complete your milling setup.

Bowl Size Compatibility: This 40mm grinding ball is specifically compatible with 500mL capacity Fritsch Grinding Bowls, ensuring optimal fit and performance within the mill.