IKA MT 40 P.10 disposable grinding beaker, interlocking beater, 40 ml, 10 pieces, 0020017838

Kinematic behaviour of the interlocking rotor and shear comminution

In analytical sample preparation, soft, viscous, elastic or extremely fibrous matrices (such as plant tissue, plastics, paper or textiles) present a major process engineering challenge. Conventional impact beaters fail physically in this context, as elastic materials absorb the kinetic impact energy through damping effects rather than fracturing brittle. The IKA MT 40 P single-use grinding beaker is equipped with a specifically interlaced (curved) stainless steel beater to solve this rheological problem. Driven by the IKA Tube Mill’s magnetic coupling at speeds of up to 25,000 revolutions per minute, this modified rotor geometry not only applies radial impact energy but also induces massive, localised shear stresses. This shearing action continuously breaks down the macromolecular fibre structures and effectively prevents plastic deformation of the sample.

Macro-fluid dynamics and prevention of wrapping effects

A fundamental mechanical problem in the high-speed grinding of long fibres is the so-called winding effect. Under conditions of severe flow turbulence, fibrous materials tend to wind statically around the rotating tool shaft. This leads to an exponential increase in torsional resistance and thermal overload of the system. The asymmetrical, twisted geometry of the P-beater acts as a hydrodynamic impeller. It generates massive three-dimensional flow turbulence (vortex), which presses the material radially against the chamber wall and cuts the fibres to pieces long before static wrapping structures can form around the axis of rotation. This guarantees a homogeneous particle size distribution within the 40-ml batch without any dead zones in the flow.

Aerosol containment and elimination of carry-over

The high-speed comminution induces significant thermodynamic stress through wall collisions. The MT 40 P grinding beakers are manufactured from high-performance thermoplastic polymers that absorb this exothermic heat and the mechanical impacts without fracturing. When grinding toxic, biohazardous or highly potent active pharmaceutical ingredients (APIs), the closed beaker acts as a hermetically sealed containment system. It physically protects the user from inhaling respirable aerosols. The ‘single-use’ concept also completely eliminates analytical cross-contamination (carry-over) between consecutive batches at the molecular level, as it eliminates the need for the time-consuming decontamination of conventional grinding chambers.

Technical details

• Product type: Single-use milling cup / Single-use milling tube
• Tool geometry: Interlaced (curved) stainless steel beater
• Processing principle: Combined shear, impact and percussion comminution
• Physical scope of application: Tough, elastic and fibrous sample matrices
• Maximum usable volume: 40 ml
• Material: Impact-resistant, transparent, high-performance thermoplastic
• Analytical focus: 100% prevention of cross-contamination (carry-over)
• Health and safety: Hermetic containment against toxic dusts and aerosols
• Compatibility (drive): Suitable exclusively for the IKA Tube Mill (control / 100)
• Packaging unit (PU): 10 pieces per set

Contents

• 10 x IKA MT 40 P disposable grinding jars (with interlocking beater)

(Important note: The IKA Tube Mill drive unit is not included in the scope of delivery!)

Individual requirements & accessories

The MT 40 P.10 grinding jars are highly specialised consumables and function exclusively in combination with the IKA Tube Mill drive system. Selecting the correct jar for your specific process is essential: for classic, hard and brittle solids (such as rock), always use the standard MT 40 jar (straight beater). Switch to the MT 40 P version with a crossed beater shown here only when processing elastic, tough or fibrous samples (such as leaves, rubber or textiles) to ensure optimum thermodynamic and kinematic efficiency. Please contact our procurement service at any time for strategic requirements planning.