Domel AZ 150 User manual

AZ MOTOR
INSTRUCTIONS FOR BEARINGS REPLACEMENT
Edition 4 (June 2014)

AZ motor Edition 4
Instructions for bearings replacement 2
1. ABOUT INSTRUCTIONS FOR BEARINGS REPLACEMENT
In this document there are presented steps for safe bearings replacement in AZ motors. Every
step is described with text and pictures so that any kind of misunderstanding is minimized to a
low level.
Before any kind of motor disassembly you should read the instructions for bearings
replacement first.
During the bearings replacement you will need some standard and specially adjusted tools.
The list of tools is described in chapter 1.2.
Some parts of the motor must not be used again. The list of new motor parts is described in
chapter 1.3.
All pictures in this document are symbolic.
Domel d.o.o is not responsible for any kind of equipment damage, motor or EC controller
failure or any kind of personal injuries or material damage that were caused because of not
following the instructions for bearings replacement.
1.1 Explanation of safety signs and safety messages
Bellow there is presented the explanation of safety signs which are used in these instructions.
For your safety and safety of your equipment you should always follow safety signs.
DANGER indicates a hazardous situation with a high level of
risk.
WARNING indicates a hazardous situation with a medium
level of risk.
CAUTION indicates a hazardous situation with a low level of
risk.
NOTE.
Notes, additional information and instruction tips.

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Instructions for bearings replacement 3
1.2. List of tools and accessories for bearings replacement
In table 1 there are presented tools that you should use for safe bearings replacement.
Table 1. List of tools for bearings replacement
Tool
marking
Name of tool Picture of tool
(a) TORX T20 screwdriver
or tool
(b) TORX T30 screwdriver
or tool
(c) retaining ring pliers
(d) Heavy duty pliers
(e) INBUS (hexagonal)
tool 5 mm for M6
screw
(f) three M6 eye bolts (AZ
84) OR two M8 eye
bolts (AZ 108 and AZ
150) OR
two eye bolts with
thread M14x1,5 (AZ
220)
or or
(g) small flat screwdriver

AZ motor Edition 4
Instructions for bearings replacement 4
(h) pliers
(i) 2 or 3 handed puller
We recommend to use
the puller from
KUKKO manufacturer
(www.kukko.com) with
small pulling arms.
(j) inductive heater
(k) special tools for front
bearing installation
We recommend using
bearing fitting tool kit
TMFT 36 from SKF
manufacturer
(www.skf.com).
(l) centring tube
(picture 1)
(m) torque wrench

AZ motor Edition 4
Instructions for bearings replacement 5
(n) assembly grease
(o) adjusted press ring
(picture 2)
(p) sharp knife
(r) rubber hammer
(s) tool for fan wheel
installation
(t) Wrench 19 mm
Dimensions for centring tube are described on picture 1 and in table 2. Dimensions for
adjusted press ring are described on picture 2 and table 3.

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Instructions for bearings replacement 6
Picture 1. Tube (tube provide concentric between rotor (shaft) and the stator support)
Table 2. Centring tube dimensions
No. Motor type A[mm] B[mm] C[mm] x/y [mm/ ˚] y [˚]
1 AZ 108 26,65 24,65 100 0.25 45
2 AZ 150 34,75 29,75 150 1 60
3 AZ 220 54,7 34,7 150 4 60
Dimension C can be longer if needed.

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Instructions for bearings replacement 7
Picture 2. Adjusted press ring dimensions
Table 3. Adjusted press ring dimensions
No. Motor type d[mm] D[mm] E[mm]
1 AZ 84 6,5 16 34,5
2 AZ 108 4,5 18 39.5
3 AZ 150 6,5 25.5 51.5
4 AZ 220 6,5 30.5 61.5

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Instructions for bearings replacement 8
1.3. List of new motor parts
In table 4 there is presented list of new motor parts. Which bearing type must be used
according to motor size is described in table 5.
Table 4. List of new motor parts
2 pieces of new bearing according
to table 5.
1 piece of new wave spring washer
according to table 5
Grounding brush support with
brushes
Dimensions:
54x15x11,3 for 748.3.xxx motors
(motor size AZ 150)
64x15x11,6 for 749.3.xxx motors
(motor size AZ 220)
New larger press ring
For 748.3.xxx motors (motor size
AZ 150)
For 749.3.xxx motors (motor size
AZ 220)
Table 5: Bearing types and wave spring washer according to motor sizes
Motor
Code
Motor size
Bearings type Size of wave spring
washer
(d1 x d2 x s x h)
Shaft end Not shaft
end
C3E D EA3S
NSK
C3E D EA3S
NSK
746.3.392 AZ 84-50 6202 ZZ 6202 ZZ 28x34,5x0,6x3
747.3.192 AZ 108-30 6204 DDU 6203 DDU 33x39,1x0,5x2,9
747.3.194 AZ 108-30 6204 DDU 6203 DDU 33x39,1x0,5x2,9

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Instructions for bearings replacement 9
747.3.392 AZ 108-55 6204 DDU 6203 DDU 33x39,1x0,5x2,9
747.3.397 AZ 108-55 6204 DDU 6203 DDU 33x39,1x0,5x2,9
748.3.292 AZ 150-45 6205 ZZ 6205 ZZ 42x51x0,5x3,4
748.3.492 AZ 150-70 6205 ZZ 6205 ZZ 42x51x0,5x3,4
748.3.496 AZ 150-70 6205 ZZ 6205 ZZ 42x51x0,5x3,4
749.3.392 AZ 220-55 6206 ZZ 6206 ZZ 51x61x0,5x3,7
749.3.393 AZ 220-55 6206 ZZ 6206 ZZ 51x61x0,5x3,7
749.3.692 AZ 220-100 6206 ZZ 6206 ZZ 51x61x0,5x3,7
749.3.694 AZ 220-100 6206 ZZ 6206 ZZ 51x61x0,5x3,7
749.3.695 AZ 220-100 6206 ZZ 6206 ZZ 51x61x0,5x3,7
749.3.901 AZ 220-55-
100 6206 ZZ 6206 ZZ 51x61x0,5x3,7
Sufficient bearings life time is guaranteed
just with bearings specified in table 5.
These bearings are filled with special
grease that ensures appropriate life time.
Using other bearing types can lead to
shorter motor life time and Domel cannot
guarantee for these bearings.
Explanation of bearing designation:
6205
ZZ
C3
E
D
EA3
S
NSK
Bearing producer
Grease quantity
S - standard (35% of free bearing space)
Type of special grease
Production location
Noise level mark
E – quiet bearing
Radial internal clearance
C3 - 6202, 6203 (11-25 m)
6204, 6205, 6206 (13-28 m)
Bearing sealing
ZZ – shields on both sides
DDU – contact rubber seals on both sides
Bearing geometry number
Other data important for new bearing selection:
 Consider ambient temperatures expected for motor operation (Motors are designed for
long term operation at temperatures from -40°C to +52°C).
 Max. long term bearing operating temperature can reach 80°C
 Grease viscosity must prevent grease leakage from bearing

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Instructions for bearings replacement 10
2. ABOUT AZ MOTORS
2.1. Motor introduction
External rotor motor types AZ are electronically commutated motors with high efficiency at
all operating area and low level of noise. The high efficiency is reflected in low motor
heating. The motors can operate between -40 and +52°C ambient temperature.
AZ motors are designed in four lamination diameters of stator: 84 mm (AZ 84), 108 mm (AZ
108), 150 mm (AZ 150) and 220 mm (AZ 220). They are made in degree of protection IP54
(closed housing). The motors are equipped with connecting cables and can be easily
connected with motor controllers.
Electronically commutated motor must be always used together with a motor controller.
Motor cannot operate without controller. Motor must not be connected directly to
voltage supply.
2.2. Purpose of usage
AZ motors are designed as standard industrial motors. On the motor shaft it is possible to
mount different types of fans used for all kind of purposes. Beside fans drive they can be used
for drive of water pumps, air compressors and all kind of industrial machines, where precise
speed regulation is needed.