Assembly Conditions - Mayr ROBA-stop-Z Instructions De Montage Et De Mise En Service

Installation and Operating Instruction for ROBA-stop
Dual Circuit Fail Safe Brake Type 892.10_.0
Sizes 60 – 2000
Usage
As a holding brake with Emergency-stop braking actions
(max. 10 per day).
• In enclosed buildings (in tropical area, in case of high
humidity with long downtimes and sea climate only with
special arrangements)
•
In a dry running environment
•
Mounting position horizontal (vertical on request)
•
In a clean environmental area
(coarse dust as well as liquids of all kinds impair the
brake function, => attach cover).
Table 1
Size Max. friction power [J]
60 20000
30000
125
250 50000
500 80000
100000
1000
2000 120000

Assembly conditions

The eccentricity of the shaft end relative to the fixing hole P.C.D.
must not exceed 0,2 mm.
The positioning tolerance of the threads for the double end stud
(3) must not exceed 0,2 mm.
The deviation In the true running of the screw-on surface to the
shaft must not exceed the permissible true running tolerance acc.
to DIN 42955 R: for sizes 60 – 500: 0,05 mm,
for sizes 1000 – 2000: 0,063 mm
Reference diameter is the pitch circle diameter for brake
attachment. Larger deviations can cause a drop of the torque,
continuous wear of the rotor and overheating.
The hub and shaft fits are to be selected so that the hub teeth do
not distort. It can clamp the rotor onto the hub causing a problem
with the brake, (recommended hub-shaft fit H7/k6).
Table 2:
Brake torque
Type 892.10_.0
Brake
M [Nm]
size
60 70 (2x 35)
125 140 (2x 70)
250 280 (2x 140)
500 540 (2x 270)
1100 (2x 550)
1000
2000 2380 (2x 1190)
Chr. Mayr GmbH + Co. KG
Eichenstraße 1
D-87665 Mauerstetten
Germany
With speed n [rpm]
1500
1500
1500
1500
750
750
+40% / -20%
.
/
Max. speed
n [rpm]
3000
3000
3000
1500
750
750
Telephone 08341/804-241+242
Telefax 08341/804-422
http://www.mayr.de
E-Mail:
Page 5 of 10
The dimension "Y" (Fig. 3 and Table 2) is to be maintained.
Rotors and braking surfaces must be free of oil and grease.
There has to be a suitable counter friction face (steel or cast
iron). Sharp-edged interruptions of the friction face have to be
avoided.
Recommended surface quality in the range of the friction surface
Ra = 1,6 µm.
Especially mounting areas made of cast iron arranged by the
customer are additionally to be drawn off with a fine abrasive
paper (granulation ≈ 400)
Brake must be checked as to supply condition (complete brake)
according to type indication.
Assembly (Figs. 1 – 3)
1. Mount gear hub, compl. (1) to the shaft acc. to Fig. 3,
observe dim. "Y" acc. to Table 2 and Fig. 3,
observe the complete supporting length of the keyway,
and lock it axially (e.g. with a retaining ring).
2. If necessary, assemble flange plate (12) using the cap screws
(12.1) (observe tightening torque acc. to Table 2).
3. Push rotor 1 (5) manually with a slight pressure via O-rings (1.1
and 1.2) onto the gear hub (1)
(rotor hub nose away from machine wall/flange plate).
Rotor must slide smoothly over hub.
No damage of the O-rings.
4. Manually turn double end stud (3) with coated side of thread
until coating (screw in limitation) into the tapped holes of the brake
screw-on surface (machine wall) or with flange plate until contact
(secure it with LOCTITE 243).
5. Push brake body (2) over double end studs (3).
6. Push rotor 2 (6) manually with a slight pressure (via O-ring) (1.2)
onto the gear hub (1).
(Rotor collar shows in direction of flange plate/machine wall).
Rotor must slide smoothly over hub.
No damage to the O-ring.
7. Push brake plate (16) over double end studs (3).
8. Uniformly attach the brake using the hexagon nuts (4).
(Tighten hexagon nuts with a torque wrench)
Observe tightening torque according to Table 2.
9. Check air gap "a" acc. to Table 2.
Nominal air gap must be given.
10. Check air gap single circuit "b" at the rotors 1 and 2.
The corresponding air gap according Table 2 must be given.
Tightening
torque hexagon
Dim. nut
"Y" (Pos. 4)
[mm] [Nm]
3 12
3 29
3 58
3 98
6 250
7 650
info@mayr.de
®
-Z
(B.8.2.0.GB)
Tight.-
torque Nom.-air
cap gap "a" Limit
screw complete air gap
(Pos.12.1) (braked)
[Nm] [mm] [mm]
+0,25
9 1,0
0,45
+0,25
21 1,2
0,50
+0,25
42 1,4
0,60
+0,3
75 1,6
0,7
180 +0,3 1,8
0,8
+0,4
550 2,0
1,1
Testing
air gap
"b"
released
single
circuit
[mm]
min. 0,15
min. 0,15
min. 0,2
min. 0,2
min. 0,25
min. 0,3
15/05/2003 TK/Kr