ROSTA
4.11
Tensioner Devices
c) Control procedure for checking belt tension
Proceed according to the mentioned guidelines on page 4.5 and 4.10 – 4.11.
There are several instruments for checking with the adequate test-force the right tension on your frictional V-belt drive.
Don't make it with your thumb, you will make an estimation mistake and your belts will wear out prematurely!
Optikrik-tester from
Optibelt
Spring scale tester from
Gates
Infrared-frequency tester
Re-tension of belts: Generally, there is no re-tension maintenance service required, however
we would recommend to check the test-force after some days of running-in with the required
operational test-force (see table above).
b) Selection of the adequate ROSTA Tensioner size
Selection table mentioning the most conventional V-belt types.
V-belt type
Width
[mm]
Height
[mm]
Diam. of smal-
ler pulley [mm]
Initial operation
test-force F
I
** [N]
Operational test-
force F
O
** [N]
Size SE* (without SE-W and SE-B)
1 belt
2 belts
3 belts
4 belts
5 belts
XPZ, SPZ
10
8
56–71
75–90
95–125
≥
125
20
22
25
28
16
18
20
22
11
11
15
15
18
18
18
18
18
18
18
18
18
18
18
27
18
27
27
27
XPA, SPA
13
10
80–100
106–140
150–200
≥
200
28
38
45
50
22
30
36
40
15
15
18
18
18
18
18
18
18
27
27
27
27
27
27
27
27
27
27
38
XPB, SPB
16
13
112–160
170–224
236–355
≥
355
50
62
77
81
40
50
62
65
18
18
18
18
18
27
27
27
27
27
38
38
27
38
38
38
38
38
38
38
XPC, SPC
22
18
224–250
265–355
≥
375
87
115
144
70
92
115
18
27
27
27
38
38
38
38
38
38
45
45
38
45
45
Z
10
6
56–100
5–7.5
11
11
11
15
15
A
13
8
80–140
10–15
11
15
18
18
18
B
17
10
125–200
20–30
15
18
18
27
27
C
22
12
200–400
40–60
18
27
27
38
38
D
32
19
355–600
70–105
18
27
38
38
45
* General basic selection criteria:
F
resulting tensioning force by a pre-tension angle of 20° (see table page 4.5)
F
I
initial operation test-force according guidelines of the belt manufacturer
z
quantity of belts in drive
2
multiplier for the compensation of belt-slippage and/or of centrifugal force generated on belt strands.
** required test-force for belt deflection of 16 mm per 1000 mm of centre distance.
The relevant deflection by shorter or longer centre distance has to be interpolated accordingly.
F = F
I
·
z
·
2
16 mm belt deflection
per 1000 mm centre distance