IKA Basic Analytical Mill A 11 and Universal Mill M 20 for Grinding and Pulverizing
Overview
The IKA Basic Analytical Mill A 11 and the IKA Universal Mill M 20 are designed for carrying out grinding of hard and brittle substances, without releasing dust, and for pulverizing softer, fibrous materials.
Crushing causes the material to be milled to heat up. This may not always be desirable because of oxidation, loss of moisture, evaporation of volatile compounds and other such changes.
The Universal Mill M 20 has a jacketed chamber and hose adapters to circulate cooling water or brine from a tap or circulating bath, and that is usually sufficient for materials that smear when hot or that produce oil.
Substances can also be cooled to make them brittle for grinding if they are relatively soft at room temperature. Dry ice (approximately -78°C) or liquid nitrogen (approximately -196°C) can both be applied in the chamber of the Analytical Mill A 11, but nitrogen cooling for material in the Universal Mill M 20 has to be done outside the unit.
These grinders are designed for bursts of activity, as the motors can overheat, and they have built in protection to prevent damage.
The grinders beaters and blades are replaceable. Fineness is primarily a function of how long the grinding operation is performed, but also depends on the properties of the material and the amount in the chamber.
Many substances can be ground, but in certain cases there is danger of dust explosion as a result of electrostatic charge.
Check with the manufacturer IKA if the substances to be ground are not examples published in operating manuals such as grain, barley, corn, malt, pectin, roasted coffee, bark, roots, nutshells, bones, ergot, compressed materials, peat, cellulose, pharmaceuticals, fertilizers, feed materials, spices, resin, potash, seeds, salts, slag. Cutters are for leaves, fibers, spices, grain, hops, cardboard, paper, hay, plastics, tobacco, peat, feed goods, dough and roots, and fish or meat.
Features of the A 11 Analytical Mill:
Batch mill for 2 different grinding procedures: impact and cutting of soft fibrous material
Impact grinding of hard, brittle or non-elastic grinding materials with included high-grade stainless steel beater that is suitable for use up to a Mohs hardness of 6
Impact grinding of materials with a Mohs hardness up to 9 with an optional beater A 11.3 coated with chromium carbide
Particularly tough substances to grind must be cooled, for example by adding pulverized dry ice or liquid nitrogen to the grinding container
An optional funnel is available that prevents the escape of ground material when nitrogen is being poured into the grinding chamber
Material must be initially broken down into pieces of approximately 1 cm in diameter
Cutting for pulverizing soft, fibrous materials is achieved with an optional cutting blade
Moist, fatty or sticky materials may cause problems by sticking to the sides of the chamber. In this case a small amount of water, filling less than half the chamber, can be added
Analytical Mill A 11 and Options
Features of the M 20 Universal Mill:
Batch mill suitable for dry grinding of hard and brittle substances
Double-walled grinding chamber can be cooled through two hose adapters with water from a tap or circulating bath
Removable easy to clean grinding chamber
Included Stainless Steel Cuter M 21 is for crushing materials up to Mohs hardness 5
Optional Tungsten Carbide Hard Material Cuter M 22 for use on hard materials up to Mohs hardness 9
Grind dry and brittle sample volumes up to 250 mL
Mill is ideal for dried vegetation, soil samples, plastic granulates, frozen food samples. Fibrous materials can be pulverized with the optional star cutter.
Fan cooled, universal-type 2/3-hp motor is completely isolated from the grinding chamber by a dust-tight (not water tight) seal, unit not designed for liquids in the chamber
Duty cycle ON/OFF (with cooling) is 7 minutes/10 minutes respectively. Automatic shut-off protection safeguards mill against overheating and overloading.
Mill is constructed of heavy-duty cast aluminum with enameled finish; supplied cutting blade and the internal chamber are stainless steel
Universal Mill M 20 and Options
Specifications (Click here):
IKA Basic Analytical Mill A 11 and Universal Mill M 20 for Grinding and Pulverizing
Specifications
Model:
Analytical Mill A 11
Universal Mill M 20
Process type:
Batch
Batch
Operating principle:
Impact and Cutting
Impact and Cutting
Motor rating input/output: (W)
160/100
620/260
Maximum speed: (rpm)
28,000
20,000
Circumference speed: (m/s)
53
72
Usable volume (maximum): (ml)
80
250
Feed hardness maximum: (mohs)
6
5
Feed grain size maximum: (mm)
10
7
Material beater/cutter:
stainless steel standard A 11.1 supplied
stainless steel standard M 21 supplied
Material milling chamber:
stainless steel
stainless steel
Power-on time ON: (m)
1
7
Power-on time OFF: (m)
10
10
Milling chamber, can be cooled with water:
no
Yes
Mill feed can be cooled in milling chamber with dry ice:
Yes
Yes
SMill feed can be cooled in milling chamber with liquid nitrogen:
Yes
no
Dimensions: W × H × D (mm)
85 × 240 × 85
170 × 350 × 170
Weight: (kg)
1.5
6.6
Permissible ambient temperature: (°C)
5 - 40
5 - 40
Permissible relative moisture: (%)
80
80
RS 232 interface
no
no
Analog output
no
no
Power: (V/Hz)
115/60
115/60
Number
Description
Price $
2900001
IKA A 11 Analytical Mill
2,906.28
1603603
IKA M 20 Universal Mill
8,382.00
2904100
For A 11 Analytical Mill, Grinding Chamber A 11.4, made of polycarbonate with stainless steel inlet, 250 mL, not suitable for cooling with N2, only applicable with double beater A 11.6
340.42
2904600
For A 11 Analytical Mill, Spare Beater A 11.1 spare beater, for pulverizing substances with a Mohs hardness up to 6
142.66
2905200
For A 11 Analytical Mill, Cutting Blade A 11.2, for pulverizing soft, fibrous materials
240.52
2983000
For A 11 Analytical Mill, Beater A 11.3, for pulverizing substances with a Mohs
hardness up to 9, coated with chromium carbide
351.64
2983100
For A 11 Analytical Mill, Spare Grinding Chamber A 11.5, made of Tefcel
(PTFE, glass fiber reinforced) with stainless steel inlet, excellent resistance to
chemicals and temperatures as low as - 200 °C
461.92
3048700
For A 11 Analytical Mill, Funnel A 11.7, helps prevent escape of fine particles
when pouring liquid nitrogen into the grinding chamber A 11.5
566.85
3302900
For A 11 Analytical Mill, Double Beater A 11.6, for use up to Mohs hardness 3, only applicable with grinding chamber A 11.4
695.55
0328200
For M 20 Universal Mill, Spare Stainless Steel Cuter M 21, suitable for crushing materials up to Mohs hardness 5
194.06
0521800
For M 20 Universal Mill, Hard Material Cuter M 22, made of tungsten carbide for hard materials up to Mohs hardness 9
890.00
1443400
For M 20 Universal Mill, Star Shaped Cutter M 23, used to crush fibrous substances such as paper and vegetation, but also for plastics and material with a low specific weight
754.08
8006200
For M 20 Universal Mill, a Second Grinding Chamber M 20.1 insures efficient processing, as the grinding chambers can be placed on the drive alternately, one chamber is cleaned and filled while the other is being processed
