MTU 12V4000C*5 series, Operating Instructions Manual

Page: 26 / 305

Thread
Hand-tightening Machine-tightening
8.8 M
A
(Nm) 10.9 M
A
(Nm) 8.8 M
A
(Nm) 10.9 M
A
(Nm)
M18 250 350 240 330
M18 x 1.5 280 400 270 380
M20 350 500 330 475
M20 x 1.5 390 550 350 520
M22 480 680 450 650
M22 x 1.5 520 730 490 700
M24 600 850 570 810
M24 x 1.5 680 950 640 900
M24 x 2 660 900 620 850
M27 900 1250 850 1175
M27 x 2 960 1350 900 1275
M30 1200 1700 1100 1600
M30 x 2 1350 1900 1250 1800
M
A
= tightening torques
Tightening torques for studs
Thread
screwed into
Steel M
A
(Nm)
Gray cast iron M
A
(Nm)
AI alloy M
A
(Nm)
M6 9 6 6
M8 11 9 10
M10 17 13 13
M12 27 23 18
M14 37 33 33
M16 55 45 –
M
A
= tightening torques
Tightening torques for setscrews and nuts made of stainless steel
The values in the table are based on a friction coefficient µtot = 0.12, lubricated with Molykote on the thread
and under the screw head.
Basic size
Strength class
Material
70 80
M
A
(Nm)
M
A
(Nm)
M5 3.7 4.9 A2 / A4
M6 6.4 8.5 A2 / A4
M8 15.3 20.4 A2 / A4
M10 31 41 A2 / A4
M12 52 70 A2 / A4
M16 126 167 A2 / A4
M20 254 326 A2 / A4
M
A
= tightening torques
24 | General Information | MS15041/03E 2018-08
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