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Hitachi WR9DM1 Manual

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* Se emplean los pernos siguientes
Perno ordinario: Divisón de dureza 4,8
Perno de gran resistencia a la tracción: División
de dureza 12,9
Perno
Tiempo de apriete: seg
(Grosor de la plancha de
acero t = 10 mm)
Tiempo de apriete: seg
(Grosor de la plancha de
acero t = 10 mm)
Tiempo de apriete: seg
(Grosor de la plancha de
acero t = 25 mm)
Torsión de apriete
Torsión de apriete
Torsión de apriete
<Para WR9DM>
Grosor de la plancha
de acero t
Fig. 18Tuerca
Explicación de la clasificación de la resistencia:
4 — Punto de relajamiento del perno: 320N/mm
2
{32,6 kgf/mm
2
}
8 — Resistencia a la tracción del perno: 400N/mm
2
{40,8 kgf/mm
2
}
)(
Tiempo de apriete: seg
(Grosor de la plancha de
acero t = 10 mm)
Tiempo de apriete: seg
(Grosor de la plancha de
acero t = 25 mm)
Tiempo de apriete: seg
(Grosor de la plancha de
acero t = 25 mm)
Torsión de apriete
Torsión de apriete
Torsión de apriete
<Para WR12DM>
M10 × 30
kgf•cm
1000
800
600
400
200
0
0 1
2
3
N•m
100
80
60
40
20
0
Perno de gran resis-
tencia a la tracción
Perno ordinario
M12 × 45
kgf•cm
1400
1200
1000
800
600
400
200
0
0 1
2
3
N•m
140
120
100
80
60
40
20
0
Perno de gran resis-
tencia a la tracción
Perno ordinario
M14 × 50
kgf•cm
1600
1400
1200
1000
800
600
400
200
0
0 1
2
3
N•m
160
140
120
100
80
60
40
20
0
Perno de gran resis-
tencia a la tracción
Perno ordinario
Fig. 16
Fig. 17
M8 × 30
kgf•cm
800
600
400
200
0
N•m
80
60
40
20
0
0
1 2 3
Perno de gran resis-
tencia a la tracción
Perno ordinario
M10 × 30
kgf•cm
1000
800
600
400
200
0
N•m
100
80
60
40
20
0
0
1 2 3
Perno de gran resis-
tencia a la tracción
Perno ordinario
M12 × 45
kgf•cm
1000
800
600
400
200
0
N•m
100
80
60
40
20
0
0
1 2 3
Perno ordinario
Perno de gran resis-tencia
a la tracción
… 68 …


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