IKA A 11.6 double beater, titanium (surface-hardened), for A 11.4 grinding cup, 0003302900

Brittle sample material can be crushed using a beater, whilst soft and fibrous materials are best cut rather than beaten. The IKA A 11 basic covers both methods using the same drive mechanism. The scope of delivery includes the A 11.1 stainless steel beater for impact grinding; a cutting blade for fibrous materials is available separately as an accessory. With a maximum speed of 28,000 revolutions per minute and a circumferential speed of up to 53 metres per second, the batch mill generates sufficient energy to grind material up to a Mohs hardness of 6, with a maximum working volume of 80 ml per grinding cycle. Impact grinding with the stainless steel beater For hard, brittle or pre-embrittled feed materials, the A 11.1 stainless steel beater included in the scope of delivery is the standard equipment, thereby already covering the vast majority of classic analytical mill applications. At up to 28,000 rpm and a circumferential speed of 53 m/s, it pulverises the material within short grinding times. The maximum feed particle size is 10 mm; larger pieces should be coarsely pre-crushed before grinding, as the mill is designed for fine grinding and does not replace a coarse crusher. The optionally available A 11.6 double beater for the A 11.4 grinding cup further increases throughput capacity where required. Cutting grinding for soft, fibrous materials For soft or fibrous samples, where a beater tends to crush rather than grind, IKA offers the A 11.2 cutting blade as a separate accessory. It is not included in the standard scope of delivery. Moist or sticky feed materials can be ground more effectively by adding water to the grinding chamber; this prevents the material from sticking to the beater or the chamber wall during the grinding process. Cooled grinding with dry ice or liquid nitrogen Some materials only become brittle enough to be efficiently impact-ground at low temperatures, such as fatty or elastic samples, which tend to deform rather than be ground at room temperature. The grinding chamber of the A 11 basic can be cooled directly using either dry ice or liquid nitrogen; this causes the material to become brittle within the grinding chamber itself, without the need for a separate pre-cooling step. In combination with the short permitted duty cycle of 1 minute of operation followed by a 10-minute pause, this allows even thermally sensitive material to be ground in a controlled manner, without it overheating due to the grinding energy and thereby losing its original structure, a factor that can be particularly relevant for subsequent chemical or physical analyses of the ground material. Typical applications With impact grinding, cutting grinding and cooling capability all in one unit, the A 11 basic covers a wide range of sample preparation tasks, from routine comminution to demanding, temperature-sensitive sample material: Impact grinding of hard, brittle or embrittled samples using stainless steel beaters, up to Mohs hardness 6 Cutting grinding of soft, fibrous materials using a cutting blade (available separately) Crushing of moist or sticky feed materials through controlled water addition Embrittlement and grinding of temperature-sensitive samples using dry ice or liquid nitrogen Sample preparation for subsequent analysis in the laboratory and for quality assurance Selection guide: which grinding tool is suitable Within the A-11 range of accessories, it is primarily the material properties of the sample that determine the suitable tool, not a different machine. The following overview shows which tool is intended for which grinding principle and what is already included in the scope of delivery for the mill. ToolPrincipleSuitable forIncluded in the scope of delivery A 11.1 Stainless steel beaterImpact grindinghard, brittle samples up to 6 on the Mohs scaleYes A 11.2 Cutting blade, stainless steelCutting grindingsoft, fibrous materialsNo, sold separately A 11.3 Beater, carbideImpact grindinghigh-wear continuous useNo, sold separately A 11.6 Double beater, stainless steelImpact grindinghigher throughput in the A 11.4 grinding cupNo, sold separately Technical details Process typeBatch Operating principleCutting and impact grinding Motor power consumption160 W Motor power output100 W Max. speed28,000 rpm Max. peripheral speed53 m/s Max. working volume80 ml Feed material hardness, max.6 on the Mohs scale Max. feed particle size10 mm Material of beater/bladeStainless steel 1.4034 Grinding chamber materialStainless steel 1.4571 Can be cooled with dry iceYes Can be cooled with liquid nitrogenYes Permissible duty cycle1 min ON, 10 min OFF Dimensions (W x H x D)85 x 240 x 85 mm Weight1.5 kg Connected load220 to 230 V, 50/60 Hz, power consumption 160 W (other voltage variants 100 to 115 V available) Degree of protectionIP 43 (DIN EN 60529) Scope of delivery 1 x IKA A 11 basic analytical mill 1 x A 11.1 stainless steel beater 1 x Tefcel (ETFE, glass-fibre-reinforced) grinding cup with stainless steel insert, usable volume 80 ml The A 11.2 cutting blade is not included in the scope of delivery and must be purchased separately for cutting grinding. Differences from the neighbouring series For those who wish to work continuously with cooling rather than manually adding dry ice or liquid nitrogen, the IKA A 10 basic (coolable) is a similar mill from the same range. The A 10 basic holds up to 50 ml, reaches 25,000 rpm and is cooled via a water connection or with dry ice. Before deciding between the two models, it is worth consulting the relevant data sheet. An overview of all mills in the range can be found in the ‘Mills’ category. Application, installation and maintenance Measuring 85 x 240 x 85 mm and weighing 1.5 kg, the A 11 basic can be placed on the laboratory bench like a handheld device and moved as required. The permitted duty cycle of 1 minute of operation followed by a 10-minute break should be observed to prevent the motor from overheating, particularly when carrying out several grinding operations in succession with different samples. The grinding chamber and grinding cup can be removed and cleaned after grinding; degree of protection IP 43 protects against solid foreign objects larger than 1 mm but is not dust protection. At the end of its service life, as an electrical appliance, the device must be disposed of via the separate collection scheme for waste electrical and electronic equipment, not in household waste. WarrantyManufacturer’s warranty from IKA: 2 years, extended to 3 years upon registration at ika.com/register within 90 days of purchase.Regulatory informationThis device is an electrical appliance within the meaning of the German Electrical and Electronic Equipment Act (ElektroG). The WEEE registration number of the manufacturer, IKA, is DE 66784213. Information on the return of old appliances can be found on our page Environment and disposal.Individual requirements and procurement service In addition to the A 11.2 cutting blade, we offer further grinding tools for the A 11 basic, such as the A 11.3 carbide beater and the A 11.6 double beater, as well as replacement grinding cups, feed hoppers and factory calibration certificates. Do you require a specific grinding tool for your sample type, an additional grinding cup as a spare part, or assistance in choosing between impact and cutting grinding? Through our procurement service, we support you with procurement and configuration. Frequently Asked Questions Is the cutting blade included in the scope of delivery?No, the scope of delivery includes the A 11.1 stainless steel beater for impact grinding. The A 11.2 cutting blade is a separate accessory. How fine or coarse can the grinding be?This depends on the tool, grinding time and sample; the usable volume per grinding cycle is a maximum of 80 ml. At 28,000 rpm and a peripheral speed of 53 m/s, sufficient grinding energy is available to ensure short cycle times. Can the material to be ground be pre-cooled?Yes, the grinding chamber can be cooled directly using either dry ice or liquid nitrogen. What is the maximum hardness of the feed material?Up to 6 on the Mohs scale for impact grinding; the maximum feed particle size is 10 mm. How long can the machine run continuously?The permissible duty cycle is 1 minute of operation followed by a 10-minute pause. What material is the grinding chamber made of?It is made of 1.4571 stainless steel; the beaters and cutting blades are made of 1.4034 stainless steel. Which grinding cup is included in the scope of delivery?A grinding cup made of Tefcel (ETFE, glass-fibre reinforced) with a stainless steel insert and a usable volume of 80 ml.