Copyright 12/14 51 S/N XXXX WO#XXXXXX
Smoracy, LLC
MODEL 3680 CUTTERHEAD SECTION
CUTTERBODY
The Cutterbody used in the Beast has a leading edge
referred to as the “raker”. The raker is designed to
control the depth of cut that the Cuttertooth will take.
As the Raker wear it allows the Cuttertooth to take larger
and larger cuts. If using a small hole screen taking
large cuts means that the material has to beat around
inside the Cutterhead housing until small enough to exit
through the screen. This robs horsepower that could
be used at the Cuttertooth. Also, taking bigger cuts
puts undue stress on the Cutterhead shaft leading to
possible shaft failure.
When new, the Cutterbody has a hard surface weld
applied to the raker area. It is imperative that this area
be maintained. The diagrams below show the height of
the raker area when new and the maximum allowable
wear. While in the machine these measurements are
taken from the face of the Cutterhead drum. When worn,
remove the Cutterbody from the Cutterhead and build
up the raker area with a hard surface weld using the
dimensions below as a guide. You could also lay a
worn Cutterbody on a new one to see the amount of
buildup necessary. If using a wire feed welder it is
suggested using a Lincoln Lincore 60-0 or a Stoody
101HC wire. In a stick rod try the Lincoln Wearshield
60 or the Stoody Stoodite 2134. If you have excessive
wear it is recommended that the Cutterbody be replaced
with a new one. Be careful not to buildup above the
height as when it was new as this will affect how the
machine feeds.
Never weld on the Cutterbodies while in the
machine, as there is the potential for fire. It pays to
have several extra Cutterbodies as replacements and
weld up worn ones at your leisure.
CUTTERBODY BOLTS
The Cutterhead of the Beast uses a replaceable
Cutterbody that is designed to fail should something
foreign get into the machine. They take an enormous
amount of abuse with the bolts that hold the Cutterbody
in place being one of the critical components. During
the initial design and testing of this machine a bolt was
developed that is made special for Smoracy, LLC just
for this application. The tolerances and the length of
the shank make it unique to any other bolt on the
market. Maintaining the proper torque of 700 ft.-lbs.
(949 Nm) on this bolt is also extremely critical. Using
the wrong bolts or not keeping them tight allows for
movement between the Cutterbody and the Support
Arms which in turn leads to fatigue and failure. Once
the Cutterbody is allowed to run loose the integrity of
the hole in the Support Arm is lost and must be replaced.
Other wise the bolt will never be able to keep tight again.
If using an air wrench, check it to make sure that it is
capable of reaching the proper torque.
A few customers have had Cutterbodies break loose
from the Cutterhead. In every case it was because they
were not using the proper bolt. A lot of lost time and
money will occur if there is a failure due to using inferior
parts. Any warranty claims will be denied if the
Cutterhead was run with anything other than parts
supplied by Smoracy, LLC.
When ordering new Cutterbodies new bolts must be
ordered as well. Order extra to have on hand for future
use.
NOTE: Take measurement from a flat surface.
Raker Area
Needs Rebuilt
or Replaced
Minimum
Dimension
NOTE: Take measurement from the face of the drum.
Standard Cutterbody
7 1/2” (191 mm)
7 7/8” (200 mm)
NEW
5 5/8” (143 mm)
MAXIMUM
WEAR
6” (152 mm)
NEW
Washers
Approximateley 1/8”
(3.2 mm)
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