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Brake torque and brake spring compression
BA series motors are provided as standard with a brake torque set to 60 - 70% of the maximum admissible brake torque indicated on the nameplate. On request the motor can come already set to a specific brake torque value different from the standard one. The brake torque is shown in the diagrams here below as a function of the brake assembly spring compression. The shown values refer to BA series motors mounted in horizontal position with an AC brake coil. DC industrial brakes have the same trend as AC brakes even if they have lower brake torque, as shown in the table below.
The values shown in the diagrams are only indicative as application conditions, brake lining wear and temperature, can affect the real brake torque. Whenever it is necessary to adjust the braking torque to a specific value it is advisable to directly measure the obtained brake torque after each brake torque adjustment. Consider that the motor mounting position influences remarkably the effective braking torque when low brake torque values are involved. Please contact MGM for further information.
71
80
90
100
112
132
160
180
200
225
14
18
38
50
80
150
190
300
300
400
9
15
30
42
60
120
155
180
180
240
Frame size
Max AC Brake Torque (Nm): Max DC Brake Torque (Nm):
BA 71
BA 80
BA 90
Nm 16 14 12 10
8
6 4
2 0
Nm 20 18 16 14 12 10
8 6 4 2 0
Nm 40
35 30 25 20 15 10 5 0
19 18 17 16 15
16,5 15,5 14,5 13,5 12,5 11,5mm
16,5 15,5 14,5 13,5 12,5 11,5 mm
BA 100
BA 112
BA 132
Nm 60 50 40
Nm 90
80 70 60 50 40 30 20 10 0
Nm 160 140 120 100
80 60 40 20 0
30
20
10
0 I I I I I I I I I I I I I
19 18 17 16 15 14mm
19 18.1 17.2 16.3 15.4 14.5 mm
18.6 18.1 17.5 17 16.4
mm
BA 160
BA180-200
BA 225
Nm 300
Nm 450
Nm
180 160 140 120 100
80 60
40
23,2 22 20,8 19,6 18,4 17,2 16 mm Light blue line: 6 industrial springs brake group Blue line: 3 springs brake group Consider that DC brake groups always have 3 springs and 155 Nm max. brake torque.
400 -
350
300 -250 -
200
150 -
100
50 -
250
200
150
100
0
39,6 38,2 36,8 35,4 34 32,6 31,2 29,8 mm
Light blue line: 6 springs brake group
Blue line: 3 springs brake group
Consider that DC brake groups always have 3 springs and 240 Nm
max. brake torque.
50
41 38 35 32
29
26 mm
Light blue line: 6 springs brake group Blue line: 3 springs brake group Consider that DC brake groups always have 3 springs and 180 Nm max. brake torque.
23
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