Hitachi ZW310 - Page 304


7-104
Tightening Torque Table
Bolt
Dia.
mm
Hexagon head bolt
M4GB-07-121 M4GB-07-122 M4GB-07-123
Wrench
size mm
Standard
torque
Allowable torque
range
Standard
torque
Allowable torque
range
Standard
torque
Allowable torque
range
N•m kgf•cm N•m kgf•cm N•m kgf•cm N•m kgf•cm N•m kgf•cm N•m kgf•cm
4 1.15 11.7 0.92 to 1.38 9.4 to 14.1 3.06 31.2 2.45 to 3.67 25.0 to 37.4 4.49 45.8 3.60 to 5.39
36.7 to
55.0
7
5 2.36 24.1 1.89 to 2.82 19.3 to 28.8 6.30 64.2 5.03 to 7.55 51.3 to 77.0 9.24 94.2 7.40 to 11.1 75.5 to 113 8
6 4.98 40.6 3.20 to 4.79 32.6 to 48.8 10.6 108 8.50 to 12.7 86.7 to 130 15.6 159 12.6 to 18.7 128 to 191 10
8 9.81 100 7.84 to 11.7 79.9 to 119 26.1 266 20.9 to 31.0 213 to 319 38.3 391 30.7 to 46.0 313 to 469 13
10 19.5 199 15.6 to 23.4 159 to 239 52.1 531 41.6 to 62.5 424 to 638 76.5 780 61.2 to 91.8 624 to 936 17
12 34.2 349 27.5 to 41.1 280 to 419 91.2 930 73.1 to 109 745 to 1110 133 1360 108 to 161
1100
to 1640
19
14 55.0 561 43.9 to 65.9 448 to 672 146 1490 117 to 177
1190
to 1800
216 2200 173 to 258
1760
to 2630
22
16 86.9 886 69.5 to 104 709 to 1060 232 2370 185 to 279
1890
to 2840
341 3480 272 to 409
2770
to 4170
24
18 118 1200 94.6 to 142 965 to 1450 315 3210 252 to 379
2570
to 3860
463 4720 370 to 555
3770
to 5660
27
20 171 1740 136 to 204
1390
to 2080
452 4610 362 to 543
3690
to 5540
665 6780 534 to 797
5440
to 8130
30
22 234 2390 187 to 252
1910
to 2570
624 6360 499 to 749
5090
to 7640
918 9360 734 to 1100
7480
to 11200
32
24 293 2990 234 to 352
2390
to 3590
782 7970 626 to 938
6380
to 9560
1150 11700 919 to 1380
9370
to 14100
36
27 436 4450 349 to 524
3560
to 5340
1160 11800 931 to 1400
9490
to 14300
1720 17500
1370
to 2050
14000
to 20900
41
30 588 6000 471 to 706
4800
to 7200
1570 16000
1260
to 1880
12800
to 19200
2300 23500
1840
to 2770
18800
to 28200
46
33 810 8260 648 to 972
6610
to 9910
2160 22000
1730
to 2590
17600
to 26400
3170 32300
2540
to 3810
25900
to 38800
50
36 1030 10500 828 to 1250
8440
to 12700
2770 28200
2210
to 3310
22500
to 33800
4060 41400
3240
to 4860
33000
to 49600
55
39 1350 13800
1080
to 1140
11000
to 11650
3600 36700
2880
to 4320
29400
to 44100
5290 53900
4240
to 6350
43200
to 64800
60

When checking the machine parts, if loose nuts and bolts
are found, retighten them to the torque values shown in
the table below.

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
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