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Par de apriete
Pares de apriete mínimos de la tornillería (en N m o lb in /lb ft) para aplicaciones de montaje
normales, a menos que se indique lo contrario
Tienen prioridad los pares de apriete mínimos de la torni-
llería que se indican en los dibujos, en las especificacio-
nes, etc.
En las siguientes tablas, se muestran especificaciones de
par siguiendo el estándar ENS7001, aplicable para las
clases de material 8.8 y 10.9.
Pernos de cabeza hexagonal
Clase 8.8 en N m (lb in o lb ft)
Medida
Tuerca
nominal
chapada
M3
1.3 N·m
(11.5 lb in)
M4
2.9 N·m
(25.7 lb in)
M5
5.9 N·m
(52.2 lb in)
M6
10.1 N·m
(89.4 lb in)
M8
24.5 N·m
(18.1 lb ft)
M10
48.7 N·m
(35.9 lb ft)
M12
85 N·m
(62.7 lb ft)
M14
135 N·m
(99.6 lb ft)
M16
210 N·m
(154.9 lb ft)
M18
299 N·m
(220.5 lb ft)
M20
425 N·m
(313.5 lb ft)
M22
579 N·m
(427 lb ft)
M24
735 N·m
(542.1 lb ft)
M27
1073 N·m
(791.4 lb ft)
M30
1461 N·m
(1077.6 lb ft)
7 - MANTENIMIENTO
Contratuerca
Tuerca
endurecida/
tuerca chapada
lubricada
0.7 N·m
1.2 N·m
(6.2 lb in)
(10.6 lb in)
1.6 N·m
2.6 N·m
(14.2 lb in)
(23.0 lb in)
3.2 N·m
5.3 N·m
(28.3 lb in)
(46.9 lb in)
5.5 N·m
9.1 N·m
(48.7 lb in)
(80.5 lb in)
13.5 N·m
22 N·m
(10.0 lb ft)
(16.2 lb ft)
26.8 N·m
43.8 N·m
(19.8 lb ft)
(32.3 lb ft)
46.7 N·m
76.5 N·m
(34.4 lb ft)
(56.4 lb ft)
74.2 N·m
121.5 N·m
(54.7 lb ft)
(89.6 lb ft)
115.5 N·m
189 N·m
(85.2 lb ft)
(139.4 lb ft)
164.4 N·m
269.1 N·m
(121.3 lb ft)
(198.5 lb ft)
233.72 N·m
382.5 N·m
(172.4 lb ft)
(282.1 lb ft)
318.4 N·m
521.1 N·m
(234.8 lb ft)
(384.3 lb ft)
404.2 N·m
661.5 N·m
(298.1 lb ft)
(487.9 lb ft)
590.1 N·m
967.5 N·m
(435.2 lb ft)
(713.6 lb ft)
803.5 N·m
1315 N·m
(592.6 lb ft)
(969.9 lb ft)
Clase 10.9 en N m (lb in o lb ft)
Tuerca
chapada
1.8 N·m
(15.9 lb in)
4.2 N·m
(37.2 lb in)
8.5 N·m
(75.2 lb in)
14.5 N·m
(10.7 lb ft)
35.1 N·m
(25.9 lb ft)
69.5 N·m
(51.3 lb ft)
121 N·m
(89.2 lb ft)
193 N·m
(142.3 lb ft)
301 N·m
(222 lb ft)
414 N·m
(305.4 lb ft)
587 N·m
(432.9 lb ft)
801 N·m
(590.8 lb ft)
1016 N·m
(749.4 lb ft)
1486 N·m
(1096 lb ft)
2020 N·m
(1489.9 lb ft)
7-5
Contratuerca
Tuerca
endurecida/
tuerca chapada
lubricada
0.9 N·m
1.6 N·m
(8.0 lb in)
(14.2 lb in)
2.3 N·m
3.7 N·m
(20.4 lb in)
(32.7 lb in)
4.6 N·m
7.6 N·m
(40.7 lb in)
(67.3 lb in)
7.9 N·m
13 N·m
(69.9 lb in)
(9.6 lb ft)
19.3 N·m
31.5 N·m
(14.2 lb ft)
(23.2 lb ft)
38.2 N·m
62.5 N·m
(28.2 lb ft)
(46.1 lb ft)
66.5 N·m
108.9 N·m
(49.0 lb ft)
(80.3 lb ft)
106.1 N·m
173.7 N·m
(78.3 lb ft)
(128.1 lb ft)
165.5 N·m
270.9 N·m
(122.1 lb ft)
(199.8 lb ft)
227.7 N·m
372.6 N·m
(167.9 lb ft)
(274.8 lb ft)
322.8 N·m
528.3 N·m
(238.1 lb ft)
(389.7 lb ft)
440.5 N·m
720.9 N·m
(324.9 lb ft)
(531.7 lb ft)
558.8 N·m
914.4 N·m
(412.1 lb ft)
(674.4 lb ft)
817.3 N·m
1337 N·m
(602.8 lb ft)
(986.1 lb ft)
1111 N·m
1818 N·m
(819.4 lb ft)
(1340.9 lb ft)
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