- 9 -
Figure 24 – Alignment of belt pulley
Figure 25 – Belt tensioning
Figure 26 – Belt deflection distance
Table 1 - Belt Tensioning Force
Belt Section
Pulley
Diameter
Deflection Force (N)
Initial Fitting
Retension
Min
Max
Min
Max
SPZ
<70
12
17
12
16
71-90
15
22
15
19
91-125
19
27
19
24
SPA
<100
20
29
20
25
101-140
27
39
27
34
141-200
32
47
32
40
SPB
<160
36
54
36
46
161-224
46
67
46
58
225-355
53
79
53
69
Refer to factory specifications for tension values that are not included
Refer to the diameter of smaller pulley
Table 2 - Adjusted Pitch Diameter
Model
VPT100Z1
VPT120A1
/ A2
VPT139A1 /
A2
VPT156A1 /
A2
VPT177A1
/ A2
VPT178B2
Max. Pitch Ø (mm)
96
114.4
133.4
150.4
171.4
171
Min. Pitch Ø (mm)
82.9
96
115
132
152.5
146.5
Adjusting Factor(mm)
1.089
1.227
1.089
1.089
1.452
1.635
No. of Turning
Adjusted
Ø (mm)
Adjusted
Ø (mm)
Adjusted Ø
(mm)
Adjusted Ø
(mm)
Adjusted
Ø (mm)
Adjusted
Ø (mm)
0.25
94.91
113.17
132.31
149.31
169.95
169.37
0.5
93.82
111.95
131.22
148.22
168.50
167.73
0.75
92.73
110.72
130.13
147.13
167.04
166.10
1
91.64
109.49
129.04
146.04
165.59
164.46
1.25
90.56
108.27
127.96
144.96
164.14
162.83
1.5
89.47
107.04
126.87
143.87
162.69
161.19
1.75
88.38
105.81
125.78
142.78
161.24
159.56
