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Service- und Wartungszeitplan, Drehmomente
17.2. Maximale Schraubendrehmomente von
Normschrauben
Grenzwerte der Schraubendrehmomente in Newtonmeter (Nm) für
Schaftschrauben mit metrischem Gewinde und Kopfauflage nach DIN
912, 931, 934. Die Schrauben befinden sich in geschmiertem Zustand
(Reibungszahl = 0,125):
Schraubenqualität (im Kopf eingeprägt)
Abmessung 8.8 10.2 12.9
M4 2,7 3,8 4,6
M5 5,5 89,5
M6 9,5 13 16
M8 23 32 39
M10 46 64 77
Aus VDI-Richtlinie 2230
Zu beachten ist, dass die Mindesteinschraubtiefe eingehalten wird.
Diese liegt bei festen (harten) Aluminiumlegierungen bei mindestens
dem 1,4-fachen des Schraubendurchmessers. In der Regel sind nicht die
Schrauben, sondern das Bauteil der schwache Punkt!
Umrechnungsfaktoren von älteren Drehmomentangaben in in-
ternational gültige SI-Einheiten
1 kgfcm = 0,0981 Nm 1 Nm = 10,1931 kgfcm
1 in lbs = 0,112 Nm 1 Nm = 8,928 in lbs Achtung:
Verwenden Sie ausschließ-
lich Edelstahlschrauben bei
der Montage von Schutz-
blechen und Zubehörteilen.
Gefahr:
Beachten Sie, dass bei
abweichenden Angaben
die in den Kapiteln 17. und
17.1. angegebenen Schrau-
bendrehmomente Vorrang
haben.
80


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