11
A
D
B
E
C
F
Gate post
(or column)
Axis of rotation
for gate leaf
Center of gate leaf
Mounting Dimensions
a
90-deg Swing
110-deg Swing
A
5 3/4 in. (14.5 cm)
4 7/8 in. (12.5 cm)
B
5 3/4 in. (14.5 cm)
4 7/8 in. (12.5 cm)
WARNING! A and B should differ by no more than 1/2 in. Larger differences may
dangerously alter the speed of operation.
C
35 1/8 in. (89.2 cm)
D
4 in. (10 cm)
3 1/8 in. (8 cm)
E
3 1/8 in. (8 cm)
3 1/8 in. (8 cm)
F
Absolute minimum of 1 3/4 in. (4.5 cm)
a
Gate speed increases as the dimensions A and B decrease. The torque adjustment may also affect the gate
speed.
b
The sum of A and B must equal a minimum of 3 5/8 in. (9 cm).
Figure 5. Important mounting dimensions for inward-swinging 412 operators, top view
mounting bracket (see Figure 6). The recessed liner
should be constructed of 3/16 or 1/4 in. steel with a
minimum interior height of 11 13/16 in. (30 cm) so as
to allow you to meet the required dimensions shown in
Figure 5. Make sure the recessed liner is securely
embedded in the post (or wall).
There are two parts to the rear mounting bracket. The
horizontal bracket attaches to the operator, and the
slotted vertical plate attaches to the gate post (see
Figure 8). Weld the two parts together and bolt the
assembly to the gate post of column. Note, though,
that use of the vertical rear mounting plate is optional.
Once you have positioned the rear mounting bracket,
attach the bracket to the post (or wall or recessed
liner), making sure the dimensions on your gate
system match those shown in Figure 5.
11 13/16 in.
(30 cm)
4 in.
(10 cm)
5 29/32 in.
(15 cm)
Figure 6. The required dimensions of the
recessed liner when notching the gate post
