DEMAG ZBA Assembly Instructions Manual page 72

9.4.2 Checking and adjusting brake
air gap s1
Checking the remaining thickness of the brake disc
B003 - B680 brakes
Brake size
Remaining thickness b min.
Condition
when new
Remaining
thickness b
min.
Checking and adjusting the brake air gap
B003 brake
Magnet assembly (9)
Feeler gauge
Brake disc (3)
Friction plate (14)
Stop plate (1)
Armature plate (2)
41777344.eps
72
The air gap must be adjusted when the max. permissible value s
reached, (however, immediately if the brake no longer releases).
IMPORTANT. If the brake is not adjusted, it will no longer release after further
i
wear. If the motor then operates against the applied brake, the brake and motor
may be damaged.
B003 B007
3,5 5
42028944.eps
End cap (6)
B020 B050 B140
6 7 8,5
B007 - B680
1) If the edge of armature plate (2) has reached mark (x) on
collared pin (4), brake disc (3) must be replaced.
B003: A check can only be carried out by measuring the
remaining thickness.
See section 9.4.3 for replacement of the brake disc.
2) If the remaining thickness of the brake disc is within
the specified tolerances, check brake air gap s
Checking and adjusting the brake air gap).
42029146.eps
Brake air gap s = 0,30 mm - s
1min
Brake air gap s = 0,30 mm - s
1min
Tighten magnet assembly (9) with the three hexagon nuts (10) uniformly
until the air gap is zero.
Then loosen the three hexagon nuts (10) by angle α1 = 120°.
Check air gap s1 using a feeler gauge at three points around the
circumference. If the measured value is within the specified range, the motor
can be re-assembled.
If this is not the case, adjust again as required.
has been
1
B280 B680
10 11
(see
1
= 1,0 mm (ZBA, ZBE)
1max
= 1,2 mm (ZBF)
1max