NORD Drivesystems B1904 User Manual
Page 11
Operating and Installation Instructions FDB (Getriebebau NORD)
Version 08.2011
Page
11
of 23
Brake
type
N (Illustration 3.1 top)
The standard type of the spring-pressure brake is delivered with a fixed braking torque M
bN
. Via
the number of springs (item 4), this torque can be varied as per 3.2.2.1.
Brake
type
C (Illustration 3.1 bottom)
The braking torque for this brake type with central adjusting ring (item 10) is also adjustable via
the number of springs as per 3.2.2.1 similar to type N. Furthermore, it can additionally be
adjusted by screwing in and screwing out the adjusting ring. The nominal braking torque
has been adjusted as soon as the ring firmly contacts the magnet housing (item 1.2). Screwing
out will result in a step-by-step reduction of the braking torque as per 3.2.2.2.
3.2.2 Technical Data
3.2.2.1 Nominal braking torques and number of springs
Size
08 10 13 15 17
20
N
20
C
23
N
23
C
26 30 40
Nominal
braking
torques
M
bN
[Nm]
7,5*
15*
30*
60*
90*
150*
150*
225*
225*
375*
600*
1500*
5 10 20 40 60 100 100 150 150 250 400 1000
3,5 7 14 28 43 70 80 107 105 187 300 850
3 6 12 23 34 57 50 85 63 125 200 675
2
4
8
17
26
42
65
500
* only with holding brake possessing emergency-stop properties
— Permissible deviations of the real braking torque:
Working brake: -30% (new) or ±20% (run-in)
Holding brake: ±20% (new) or -10/+30% (run-in) —
Size
08 10 13 15 17
20
N
20
C
23
N
23
C
26 30 40
Number
of
springs
for the
above M
bN
― Please, ask for spring quantities for nominal braking torques deviating from M
bN
―
7 7 7 7 7 7 8 7 8 8 8 12
5 5 5 5 5 5 6 5 6 6 6 10
4 4 4 4 4 4 4 4 4 4 4 8
3 3 3 3 3 3
3
6
3.2.2.2 Torque reduction (design C)
Size
08
C
10
C
13
C
15
C
17
C
20
C
23
C
26 30 40
Torque reduction
/ latching step
[Nm]
0,2 0,2 0,3 1 1,3 1,5 2
no standard design C
Number of usable
latching steps
(max. permissible
turning out the
threaded ring)
6 12 12 9 12 18 24