Description
When required, initial material too large for the McCrone
Mill can be rapidly and easily reduced to suitable sizes by the use
of the sample preparation kit.
Each element within the grinding vessel moves with respect to
its neighbour so as to produce linear contact blows and planar
shearing.
The grinding vessel consists of a 125ml capacity polypropylene jar
fitted with a screw capped gasketless polyethylene closure.
The jar is packed with an ordered array of forty-eight identical
cylindrical grinding elements which are available in either Agate
or Corundum. Depending on the material, grinding time is between 3
and 30 minutes and optimum grinding efficiency is usually achieved
with 2ml of sample.
There is minimal particle damage to surfaces and the internal
structure.
Principle of Operation
Dry sample of maximum 12 mm diameter and 40 mm length is
placed inside the steel cylinder, between 2 Corundum pellets. The
steel piston is the placed in the cylinder on top of the corundum
pellets and given several sharp taps with a 1 kg hammer (not
included in the kit). The crushed sample is then emptied out onto
the sieve. The sieve oversize is returned to the percussion mortar
for further processing until all particles will pass through the
sieve. The steel base can be unscrewed from the steel cylinder for
cleaning. A pair of Tungsten Carbide pellets is also available as
an optional extra.
Weights and Dimension
Percussion mortar only: 108 mm high x 38 mm max diameter.
Weight 410g
Percussion Mortar
Material: Stainless Steel
Closure Method: Screw Thread
Sample Materials
Carbides, Nitrides, Borides, Cement, Clay, Shale, Mica, Bone.