Maeda CC1908S-1 - Page 222

6.6 STANDARD TIGHTENING TORQUES M A E D A Crawler Crane
6-14 5/2020 CC1908S-1
[2] Strength class "10.9" bolts
Nominal size
(a)
Width across
flats (b)
Target tightening torque Tightening torque range
mm mm ftꞏlbs Nꞏm kgfꞏm ftꞏlbs Nꞏm kgfꞏm
6 10 8.1 11.0 1.1 6.9-9.4 9.4-12.7 0.93-1.26
8 13 19.9 27.0 2.7 17.0-22.9 23.0-31.1 2.3-3.10
10 17 39.1 53.0 5.4 33.2-45.0 45.0-61.0 4.6-6.21
12 19 68.6 93.0 9.5 58.3-78.9 79.0-107 8.10-10.9
14 22 109 148 15.1 92.9-125 126-170 12.8-17.4
16 24 170 231 23.5 145-196 196-266 20.0-27.0
18 27 234 317 32.3 198-269 269-365 27.5-37.1
20 30 332 450 45.9 283-382 383-518 39.0-52.8
22 32 451 612 62.4 384-519 520-704 53.0-71.8
24 36 574 778 79.3 488-660 661-895 67.4-91.2
27 41 833 1130 116 709-959 961-1300 98.6-133
30 46 1136 1540 158 966-1306 1310-1770 134-182
33 50 1549 2100 214 1320-1778 1790-2410 182-246
36 55 1992 2700 275 1696-2287 2300-3100 234-316
[3] Strength class "12.9" bolts
Nominal size
(a)
Width across
flats (b)
Target tightening torque Tightening torque range
mm mm ftꞏlbs Nꞏm kgfꞏm ftꞏlbs Nꞏm kgfꞏm
6 10 9.6 13.0 1.30 8.2-11.1 11.1-15.0 1.11-1.50
8 13 23.2 31.5 3.20 19.8-26.7 26.8-36.2 2.72-3.70
10 17 46.1 62.5 6.40 39.2-53.0 53.1-71.9 5.44-7.35
12 19 80.4 109 11.1 68.4-92.2 92.7-125 9.44-12.8
14 22 128 174 17.7 109-148 148-200 15.0-20.4
16 24 200 271 27.7 170-230 230-312 23.5-31.9
18 27 275 373 38.1 234-316 317-429 32.4-43.8
20 30 390 529 54.0 332-448 450-608 45.9-62.1
22 32 531 720 73.4 451-611 612-828 62.4-84.4
24 36 675 915 93.3 574-774 778-1050 79.3-107
27 41 988 1340 136 841-1136 1140-1540 116-156
30 46 1342 1820 185 1143-1542 1550-2090 157-213
33 50 1822 2470 252 1549-2095 2100-2840 214-290
36 55 2346 3180 324 1992-2700 2700-3660 275-373