OPERATING PRINCIPLE
Product strikes the exposed cutting edges
of the microcut blades with great velocity (Fig-
ure 15).This action results in the removal of
small particles until reduction is completed.
Particles are discharged through the spaces
between the blades. Because of high impeller
speeds, product remains in the microcut head
only a fraction of a second.The product is re-
duced in precise increments, emerging a uni-
form size.
DESCRIPTION
The microcut head is a ring of closely
spaced blades held in place by specialized
sets of rings (Figure 16). Microcut heads are
identified by the Urschel 5-digit part number
and a corresponding description number. The
description number indicates the quantity and
thickness of blades, and the blade angle, if any,
in the microcut head.See page 66 for more de-
tailed information.
Microcut Blades: Tungsten carbide micro-
cut blades are available in two thicknesses:
.156" and .084" (Figure 17). The .156" thick
blades are used on microcut heads using 100
or less blades.The .084" thick blades are used
on all other heads.
Microcut blades made of zirconia ceramic
are available in .084" width. This material is
more acid and wear resistant, but is also more
brittle and will break more easily than tungsten
carbide if subjected to shock or the impact of
foreign objects in the product. Broken zirconia
blades will not show up on metal detection de-
vices.
(continued on page 22)
OPERATION
General Information, Microcut Heads
21
Figure 16 — Microcut Head. (1) Blades, (2) Upper and
Lower Blade Holding Rings
Figure 17— Microcut Blades (Tungsten Carbide). (1)
.156" Blades, (2) .084" Blades
1
2
Figure 15 — Microcut head operation (1) Blades, (2)
Product, (3) Impeller
1
2
3
2
1
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