30mm Grinding Ball, Sintered Corundum

30mm Sintered Corundum Grinding Balls for Fritsch Planetary Mills

Product Overview: Our 30mm Sintered Corundum Grinding Balls are specifically designed for optimal performance in Fritsch Planetary Mills. These high-quality grinding balls are placed within grinding bowls alongside your sample to facilitate efficient and precise material size reduction. The characteristics of the grinding balls, such as their size and quantity, directly influence the final particle size distribution of your milled product.

Key Features & Benefits:

• Optimal Density: With a density of 3.8 g/cm³, these sintered corundum balls provide effective impact and shear forces for consistent grinding.
• Material Suitability: Ideal for processing medium-hard and fibrous samples, offering excellent resistance to abrasion and chemical inertness. Corundum's high purity makes it suitable for applications where minimal contamination is critical.
• Enhanced Grinding Efficiency: When used correctly, these balls help achieve rapid and uniform comminution, reducing grinding times and producing finer particle sizes.
• Excellent Wear Resistance: Sintered corundum is known for its extreme hardness (Mohs hardness of 9), ensuring a longer lifespan for the grinding balls and minimizing material loss due to wear.
• Chemical Inertness: Resistant to most acids and alkalis, making them suitable for a wide range of samples without concern for chemical reactions or contamination.

Usage Guidelines for Optimal Results: The selection of the appropriate ball size and quantity is crucial and often best refined through user trials tailored to your specific application and desired outcome.

• Particle Size Control: Generally, larger balls tend to yield a coarser final product, while smaller balls facilitate a finer particle size reduction.
• Grinding Speed & Fineness: Increasing the quantity of grinding balls can significantly reduce grinding times and lead to finer size distributions, up to an optimal loading point.
• Avoid Mixing Sizes: For consistent and predictable results, it is not recommended to combine balls of different sizes within the same grinding jar.
• Bowl Filling Capacity: To ensure effective grinding action and prevent inefficient milling, the grinding bowl should not be filled beyond two-thirds of its total volume with both samples and balls. A minimum of one-third of the bowl volume should be reserved for the dynamic movement essential for grinding.
• Material Compatibility: Always use grinding bowls and balls made from materials harder than your sample to prevent unwanted contamination and maximize efficiency. For extremely hard samples, consider pairing tungsten carbide balls with steel bowls or zirconium oxide balls with corundum bowls, while being mindful of potential cross-contamination between dissimilar materials.

Compatibility: These 30mm grinding balls are compatible with 500ml, 250ml, and 80mL Fritsch Classic and Premium Grinding Bowls.

Purchasing Information: Unless otherwise specified (e.g., 3mm diameter and smaller balls come in 100-piece sets), all other grinding balls are sold individually. Classic Grinding Bowls or Premium Grinding Bowls are purchased separately to complete your milling setup.