Enclosed Cylinders

The following is information on our
enclosed cylinder with sectional rasp bar
mountings for conventional combines.

The round periphery of the main cylinder
body, about 2 ½" below the top arch of the
cylinder bars, holds material against the
concave surface, but also has adequate depth
for larger crop components such as ears of
corn to be fed thru without crushing, while the
sloped leading face of the cylinder bar mount
feeds material to the tooth area. The teeth on
the rasp bars are spaced at ½" apart. This
wider spacing of the teeth pulls material thru
more easily, and allows grain to channel
between them…larger grains are not
entrapped, but adequate overlap is maintained
for threshing of small grains. This
combination, in tandem with the resistance
provided by the concave crossbars, rolls and
fluffs material much more easily than lower
profile cylinder bars, and lessens the
requirement for tearing up trash for
separation—cleaning shoe load is greatly
reduced, lessening returned grain, and faster
cylinder speed requirements are also reduced,
both of which help to prevent cracking.

Shorter castings allow mixing of harder
alloys for longer service life, since warping is
not a consideration.

Cylinder balance is much easier to
maintain, since material can't get inside.