IDENTIFYING CUTTING HEADS
Cutting heads are identified by the Urschel
5 digit part number and a corresponding de-
scription number stamped or embossed on the
mounting lugs or columns (Figure 66).
The first digit (3) in the sample description
number indicates the cutting head height. The
Model 1700 uses both 3" and 2" cutting parts.
The letter (K) refers to the type of head.Type
indicates the pattern and number of columns,
which contain the cutting edges.There are sev-
eral cutting head types available, such as A,
B, J, K and M to produce different cutting ac-
tions.Fewer columns will produce a thicker par-
ticle. See page 19 for additional information.
The next three numbers (030) indicate the
metal thickness, in thousandths of an inch, of
the horizontal separators.
The last series of numbers (120) indicate the
opening between the horizontal separators in
thousandths of an inch.
The “U” suffix identifies an Urschalloy cutting
head; a description number without a “U” indi-
cates a fabricated cutting head. Note that some
cutting heads with the same type designation
(such as type A or K) have a different pattern
and number of columns depending on whether
the head is cast (Urschalloy) or fabricated.
Special column cutting heads are used for
producing coarse or large chunks. These
heads have fewer columns (vertical cutting
edges) and few, if any, horizontal separators.
Description numbers very slightly from those of
standard cutting heads. The number of
columns is indicated by the last number in the
description, for example, 3-060750-14 (14
columns). No column number designation with
a “P” after cutting head height indicates 12
columns.
INSPECTION
Clean and inspect cutting heads for damage
and wear. Mounting surfaces and lugs must be
free from nicks, burrs and foreign material to
insure proper seating. Many sizes of both
Urschalloy and fabricated cutting heads can
be resharpened. Cutting heads should be
replaced when damaged or when the quality
of cut is no longer satisfactory. See pages
112–115 for a list of available cutting heads.
MAINTENANCE
Cutting Heads
64
Figure 66 — Cutting head description number (1) Cut-
ting Head Height, (2) Cutting Head Type, (3) Thickness
of Horizontal Separators, (4) Openings Between Sepa-
rators, (5) When present, indicates Urschalloy, (6) Hori-
zontal Separators, (7) Columns, (8) Mounting Lugs
3 K - 030 120 - U
2 5
6
8
7
1 3 4
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