30
E
N
G
L
IS
H
The brake disc must be changed when 1,5 mm of
friction material has worn off each side (total wear 3
mm). This corresponds to an overall thickness of the
brake disc of about 7 mm for sizes 71÷100, 8 mm for
sizes 112÷160, and about 4 mm for size 63.
For the 71÷160 range of motors (fig. 4A), proceed as
follows:
- Unscrew the first set of nuts
fk
B
and remove the
electro-magnet being careful not to damage the
power supply cables for the brake. Unscrew the
second set of nuts
fk
A
, the adjustment nuts
et
and remove the springs. Remove the mobile arma-
ture and pull the brake disc off the toothed hub.
Replace the brake disc and reassemble the parts
removed previously, being careful to set the brak-
ing torque (see 4.3) and the air gap (see 4.4).
For size 63 motors (fig. 4B), proceed as follows:
- Unscrew the fixing screws
es
and remove the sin-
gle unit being careful not to damage the power
supply cable for the brake. Pull the brake disc off
the toothed hub.
Replace the brake disc and
reassemble the parts removed previously, being
careful to set the braking torque (see 4.3) and the
air gap (see 4.4).
4.5 Changing the brake disc
motors 63÷160
es fl et
fk
A
fk
B
dp
dq
br
dm
dl
A
Y
br
dm
dl
fl
dp
et
es fk
A
dq
Y
A
Fig. 4B
Fig. 4A
Size
71÷160
Size
63
