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INSTALLATION
Adjusting the closing force of spring rope pulleys with sliding hub
Closing force/travel of spring rope pulley
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4
Installation instructions - Spring rope pulley 177 diameter series
On both sides of the spring rope pulley is a tensioning
screw (SW 17). Turning it in the direction of arrow
increases the pretension, turning against the direction
of arrow reduces the pretension.
Thanks to the integrated sliding hub, there is no risk
of damaging the spring in case of an error during
tensioning.
The closing force can be adapted by preten-
sioning the spring rope pulley. The higher the
pretension of the spring, the shorter, however, is
the remaining travel. The maximum possible travel
with the respective spring force (pretension) can
be found in the adjoining diagram.
Example:
If the spring is pretensioned only the required 6
revolutions, a travel of 4 m is possible. At the
end, when the door will be closed, there will be
left a force of approx. 62 N. If the spring is pre-
tensioned one revolution more, the travel will be
reduced to 3.6 m, but the remaining force in the
final position will be approx. 66 N.
DICTATOR Technik GmbH · +49 (0)821 246730 · info@dictator.de · en.dictator.de
Verbleibender Arbeitsweg = remaining travel
Vorspannung = pretension
Arbeitsbereich = working range
Umdrehungen = revolutions
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