14
thick. The U-shaped section of the shoe must be a
minimum of 5 3/4 in. (2.1 cm) long and must be as wide
as the gate leaf is thick and must fit as tightly as
possible to minimize leaf movement within the shoe
(see Figure 11).
Construct the U-shaped section of the shoe and verify
that it fits around the gate leaf. Position the U-shaped
section over the splined shaft so that the leaf's axis of
rotation will fall within the minimum dimensions shown
in Figure 11.
On the U-shaped section of the shoe, mark the position
for the leaf's axis of rotation. Next, drill a pilot hole in
the U-shaped section to mark the axis of rotation point
and mark the position for the placement of the vertical
section of the shoe.
Next you need to position the sleeve for the splined
shaft of the pinion (or the shear-pin assembly) on the
bottom side of the U-shaped section of the shoe as
shown in Figure 10. On the bottom of the U-shaped
shoe section, center the sleeve around the pilot hole that
marks the axis or rotation. Accurately centering the
pilot hole is important.
Caution:
NEVER
weld the splined shaft to
anything.
Axis of rotation
within body of
gate leaf
Axis of rotation
outside body of
gate leaf
Splined shaft
Splined shaft
sleeve
U-shaped
section of
gate leaf
shoe
Vertical
section
Gate leaf
Gate leaf
Vertical
section
Note
: The gate's axis of rotation may fall within or outside the body of the gate leaf.
Figure 10. Parts of the gate leaf shoe
Axis of rotation
for gate leaf
Centerline of
gate leaf
Vertical section can be
located on either side
of axis of rotation
Minimum of
3/4 in. (1.9 cm)
Recommended minimum of 10 in. (25 cm)
Thickness
of the
gate leaf
Bottom of
U-shaped
section
Absolute minimum of 5 in. (12.7 cm)
between vertical section and end of
U-shaped section
Figure 11. Top view of the U-shaped section of the gate leaf shoe
