Specifications

EM-506 (N-07/03) 4-3
the bed top to the ram nose when the ram is at
maximum UP stroke position. CLOSED HEIGHT is
the minimum die space available. It is the distance
from bed top to ram nose when the ram is at bottom
of the stroke. See Figure 4-1.
FIGURE 4-1 Die Space
THROAT: Most forming on press brakes is done
between the housings. However, when long materials
or forming at one end of the machine is required, the
housing throat provides space for the material. This
space is limited by the depth of throat. Details of the
throat are found on the Throat detail drawing.
CLOSED POSITION: This is the overall height of the
dies when ram is at the bottom of the stroke and is
adjusted to make the proper bend. See Figure 4-2.
DIE PENETRATION: This is the distance the upper
die penetrates the lower die. For a 90° air bend die the
penetration is about 40% of the vee die opening.
The combined height of the dies and filler block when
in the closed position must be more than the closed
height but less than the open height dimensions. The
difference between this combined height and the open
height is the maximum amount of stroke that can be
used for a particular setup.
FIGURE 4-2 Closed position
FILLER BLOCKS: Various types of filler blocks are
available to hold the lower die. They provide a means
of adjusting and clamping the lower die in position.
Filler blocks are optional and should be selected to
suit the machine tooling and type of bending.
MICROCROWNING: A crown is machined into the
bed of each CINCINNATI Press Brake. It is designed
so the bed and ram will be parallel at 1/2 to 2/3 of
machine capacity with a load uniformly distributed
over the nominal length of the machine. This feature
improves bend accuracy under normal forming loads
and minimizes shimming of the dies. Machines
furnished with the optional AUTO CROWN system
do not have microcrowned beds.
CAPACITIES
PUNCHING CAPACITY
CINCINNATI Hydraulic Press Brakes are rated to
perform punching loads up to 66% of the maximum
machine capacity at the center of the machine when
punching mild steel using self-contained units on an
occasional basis. When punching is to be performed on a