Nicotra RSH User Manual

Cod. 985719 – 00 / July 2004
12
4.2.3. Belt tension
If you do not have a specific instrument, such as a tension gauge, to measure the belt tension, you can apply the
following approximate method:
Proceed with the tensioning of the belts by gradual tensioning of the motor base. Correct running of the fan is
determined by the correct tensioning. To ensure correct tensioning it is necessary to measure the tensioning force of
each belt by means of a dynamometer. Measure in the middle of the free length 'T' a perpendicular force able to deflect
the belt of an arrow "f" of 1.5mm for each 100mm of "T". Then compare the result with the dynamometer values F' and F"
in the following table.
Belt section
External diam.
Minor pulley (mm)
RPM minor
pulley
Min. F’ Newton Max F’’ Newton
SPZ
50÷90
100÷150
155÷180
1200÷5000
900÷1800
600÷1200
10
20
25
15
30
35
SPA
90÷145
150195
200÷250
900÷1800
600÷1200
400÷900
25
30
35
35
45
50
SPB
170÷235
250÷320
330÷400
900÷1800
600÷1500
400÷900
35
40
45
45
60
65
SPC
250÷320
330÷400
440÷520
900÷1800
600÷1200
400÷900
70
80
90
100
115
130

Nicotra RSH Specifications

General

Brand	Nicotra
Model	RSH
Category	Fan
Language	English