37
MAINTENANcE AND SErvIcE
9.2.2 check air gap
The brakes are delivered ex works with pre-set air gap X (nominal air gap) ready for
installation. As a result of wear, the air gap increases. To ensure proper functioning, the
air gap (distance between magnet housing on lining) needs to be checked in regular
intervals in energized state with dial gauge (measuring bridge). An adjustment of the
air gap is not possible. The wearing parts must be replaced on exceeding of value X
N
.
Size
Air gap
Lining thickness in new
condition g
Rated value X
Limiting value X
N
mm
mm
mm
02
0,2
0,4
7,5
03
0,2
0,5
8,0
04
0,2
0,6
10,5
05
0,2
0,6
12,0
06
0,3
1,0
12,0
07
0,3
1,0
14,0
08
0,4
1,2
16,0
09
0,4
1,2
18,0
10
0,5
1,5
22,0
Checking the air gap X
►
Connect the brake to rated voltage (armature must be applied to the magnet).
►
The supply voltage can be found in the performance data on the type plate at the
magnet or in the drawings.
►
Adjust the measuring bridge with dial gauge (zero setting).
► Place the measuring bridge as shown in the figure.
►
The air gap X is the difference between zero setting and displayed value.
►
Repeat the measurement at three different positions (approx. 3 x 120°).
►
If a value greater than ’ X
N
Summary of Contents for COMBISTOP 28
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