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14.2. 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
Service- und Wartungszeitplan, Drehmomente
Achtung:
Verwenden Sie ausschließlich
Edelstahlschrauben bei der
Montage von Schutzblechen
und Zubehörteilen.
Gefahr:
Beachten Sie, dass bei abwei-
chenden Angaben die in den
Kapiteln 14. und 14.1. ange-
gebenen Schraubendrehmo-
mente Vorrang haben.
78


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