Cole-Parmer BM-450 Mixer/Mill®

Product Description

When it comes to above-average efficiency with very high energy input and long grinding times, the Cole-Parmer BM-450 Mixer/Mill® is the first choice among high-energy ball mills. Together with the smaller “BM-400 Mixer/Mill®” model, the BM-450 Mixer/Mill® represents the standard for the “mechanical alloying” application area. The mill is structurally and mechanically designed for long operating times and works for up to 100 minutes at a time as standard, but can also be operated for up to 175 hours (10,500 minutes) at a time without interruption thanks to simple “chip tuning “*.

During operation, the grinding bowl undergoes an eight-shaped movement, the proportional horizontal movement of the grinding bowl and an additional movement (forwards/backwards) generate very high forces each time the grinding balls hit the grinding bowl wall. The samples are ground and mixed or mechanically alloyed quickly and finely by these high forces. This mill is therefore also ideal for grinding hard, brittle material with a grinding capacity of 0.2 to 10 g, depending on the grinding container, or for mixing powders up to a volume of approx. 50 ml. Grinding can be carried out both dry and wet, with or without grinding aids, depending on requirements.

Various grinding and mixing containers with different volumes and made of different materials are available for a wide range of samples and a wide variety of mixing and grinding tasks; further details are listed under “Options/Accessories”. Two grinding containers can be operated in parallel in the Cole-Parmer BM-450 Mixer/Mill®, and multi-adapters are available for smaller grinding/mixing containers for the simultaneous holding and parallel processing of 4 or 7 containers. The counter-balanced grinding container movement reduces vibration during the grinding process. If only one grinding container holder is occupied, the second grinding container holder must be fitted with a counterweight.

The operation of the Cole-Parmer BM-450 Mixer/Mill® is extremely simple: the two prepared grinding sets with the sample and the grinding balls are closed and inserted into the respective clamping device of the mill in just a few seconds and the mill is ready to start. The desired grinding time is entered using the keypad on the front of the appliance, while an electronic timer ensures reproducible conditions. For the operator’s safety, the appliance door remains closed during operation thanks to a safety mechanism and only opens again after the time has elapsed or after manual cancellation by the user.

Typical application areas: Mechanical alloying, wet and dry grinding, mixing and emulsifying

Typical sample spectrum: Rock, minerals, sand, cement, slag, ceramics, catalyst carriers, glass, pharmaceuticals, plant, animal and human samples, cannabis, paints and varnishes.

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Specifications

Grinding chamber movement: Figure-of-eight, 5.9 cm forwards and backwards, 2.5 cm sideways;

Grinding chamber speed: 875 cycles per minute (alternatively up to 1,060 cycles per minute with a modified pulley)

Grinding duration: maximum 100 minutes, extendable to 1,000 or 10,500 minutes*

Motor: 1,425 rpm, approx. 250W

Mains connection: 230 V / 50 Hz

Dimensions: 36 cm height x 64 cm width x 54 cm depth

Weight: 42 kg

* Note: the extension of the grinding duration to 1,000 or 10,500 minutes (‘chip tuning’) can only be carried out at the factory

Options and Accessories

Grinding sets and grinding balls for the Cole-Parmer BM-450 Mixer/Mill® are available in the following materials, with varying grinding or mixing capacities and diameters:

• Hardened steel (3 different grinding sets, 2 different grinding balls or sets)

• Stainless steel (3 different grinding sets, 2 different grinding balls or sets)

• Tungsten carbide (3 different grinding sets, 2 different grinding balls or sets)

• Aluminium oxide ceramic (1 grinding set, 1 grinding ball)

• Agate (3 different grinding sets, 2 different grinding balls or sets)

• Silicon nitride (1 grinding set, 1 grinding ball)

Applications