Maeda MC815C, Operation Manual, Page: 265 / 426

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7. ACCESSORY TOOLS AND STANDARD TIGHTENING
TORQUE
7.1 LIST OF STANDARD TIGHTENING TORQUE
Please note that if you use other than the specified tightening torque, machine failure or
malfunction might occur due to the damage or loosening of the connector.
Torque the metric bolts and nuts with no specific indication to the
values shown in this table.
Adequate tightening torque is determined with respect to a width
across flat (b) of a bolt or nut.
[Table 1]
Nominal
size
a
(mm)
Width
across
flat
b
(mm)
[1] Bolt marked with “8.8”
(strength classification)
on its head
[2] Bolt marked with “10.9”
(strength classification)
on its head
Tightening torque {N•m (kgf•m)} Tightening torque {N•m (kgf•m)}
Target value Tolerance
Target
value
Tolerance
6 10 7.8 (0.80) 6.8–9.0 (0.70–0.92) 11.0 (1.1) 9.4–12.7 (0.93–1.26)
8 13 19.0 (1.95) 16.5–21.9 (1.70–2.24) 27.0 (2.7) 23.0–31.1 (2.3–3.10)
10 17 37.5 (3.85) 32.6–43.1 (3.35–4.43) 53.0 (5.4) 45.0–61.0 (4.6–6.21)
12 19 65.5 (6.70) 57.0–75.3 (5.85–7.70) 93.0 (9.5) 79.0–107 (8.10–10.9)
14 22 104 (10.6) 90.4–120 (9.2–12.2) 148 (15.1) 126–170 (12.8–17.4)
16 24 163 (16.6) 142–187 (14.4–19.1) 231 (23.5) 196–266 (20.0–27.0)
18 27 224 (22.8) 195–258 (19.8–26.2) 317 (32.3) 269–365 (27.5–37.1)
20 30 318 (32.4) 277–366 (28.2–37.3) 450 (45.9) 383–518 (39.0–52.8)
22 32 432 (44.0) 376–497 (38.3–50.6) 612 (62.4) 520–704 (53.0–71.8)
24 36 549 (56.0) 477–631 (48.7–64.4) 778 (79.3) 661–895 (67.4–91.2)
27 41 804 (81.9) 699–925 (71.2–94.2) 1130 (116) 961–1300 (98.6–133)
30 46 1090 (111) 948–1250 (96.5–128) 1540 (158) 1310–1770 (134–182)
33 50 1485 (151) 1290–1710 (131–174) 2100 (214) 1790–2410 (182–246)
36 55 1910 (194) 1660–2200 (167–223) 2700 (275) 2300–3100 (234–316)