Robuschi RBS - Page 28

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4.4.2 Belt drive coupling
Utilize pulleys with minimum diameter equal or major than the value indicated in the table below.
Warning : Do not use a hammer to mount the pulleys.
Use suitable equipment to mount the pulleys onto the blower and motor shafts.
Minimum allowed blower pulley pitch diameter
Differential pressure ( mbar )
Size
200 300 400 500 600 700 800 900 1000
15 100 100 100 100 112 112 125 125
25 100 100 100 112 112 125
35 80 80 80 80 80 90 100 106 112
45 80 80 80 90 100 106 112 118 125
46 90 100 106 112 118 125
55 80 80 80 80 80 90 100 106 112
65 80 80 80 90 100 106 112 118 125
66 90 100 106 112 118 125
75 80 90 100 106 112 118 125 132 140
85 100 106 112 118 125 132 140 150 160
86 118 125 132 140 150 160
95 100 106 112 118 125 132 140 150 160
105 112 118 125 132 140 150 160 180 200
106 132 140 150 160 180 200
115 106 112 118 125 132 140 150 160 180
125 118 125 132 140 150 160 180 200 225
126 140 150 160 180 200 225
135 112 118 125 132 140 150 160 180 200
145 125 132 140 150 160 180 200 225 250
155 150 160 180 200 225 250
165 150 160 180 200 225 250 280 300 325
175 180 200 225 250 280 300 325 350 400
205 200 225 250 280 300 325 350 400 450
225 280 300 325 350 400 450
Mount the drive belts
Produce belt tension by using the motor thrust screws in accordance with the values shown in the table
Belt
profile
Force F
( daN )
Diameter D
of smaller
pulley
( mm )
Deflection
E
( mm )
SPZ
XPZ
2.5
95 – 125>
132
1.45
1.30
SPA
XPA
5.0
100 – 140
150 – 200
> 224
2.30
2.10
2.00
SPB
XPB
7.5
160 – 224
236 – 355
> 375
1.55
1.20
1.10
SPC
XPC
12.5
250 – 355
375 - 560
1.80
1.60
e = I x E / 100
Fig. 7
Warning : Excessive belt tension could damage the blower and the motor
During this phase check the alignment of the pulley by using a scale as per Fig. 7
Secure the feet of the motor
e
F
I
D
p