Baroness LM285, Руководство по эксплуатации для владельца, Страница: 32 / 65

Tightening torques
Standard tightening torques
Bolts and screws
Unless otherwise instructed, tighten bolts or nuts by the specified torque using an appropriate tool.
Excessive tightening of a screw may cause it to become loose or damaged. The appropriate
tightening torque depends on factors such as the type of screw, its strength, and the friction of its
thread and bearing surface.
The following list is for galvanized and parkerized bolts only. The values given in this list do not apply
to low-strength female screws.
Do not use a screw that has rusted or has foreign matter such as sand on it. Such a screw cannot be
fully tightened even if it is tightened by the specified torque. The friction on the thread surface
increases, causing a loss of torque that results in an insufficient tightening torque being exerted. If a
screw is wet or oily, do not tighten it by the specified torque. If a screw gets wet, the torque coefficient
decreases, resulting in excessive tightening of the screw if it is tightened by the specified torque.
Excessive tightening of a screw may cause it to elongate, resulting in the screw becoming loose or
damaged. Do not use a screw that has already been subjected to a large load.
Tightening a bolt with an impact wrench requires skill. Practice tightening bolts to ensure you are able
to tighten them reliably.
Nominal
diameter
General bolts
Strength class: 4.8
M
4 T
4.8
tib3yb-001
N-m kgf-cm lb-in
M5 3 - 5 30.59 - 50.99 26.55 - 44.26
M6 7 - 9 71.38 - 91.77 61.96 - 79.66
M8 14 - 19 142.76 - 193.74 123.91 - 168.17
M10 29 - 38 295.71 - 387.49 256.68 - 336.34
M12 52 - 67 530.24 - 683.20 460.25 - 593.02
M14 70 - 94 713.79 - 958.52 619.57 - 831.99
M16 88 - 112 897.34 - 1142.06 778.89 - 991.31
M18 116 - 144 1,182.85 - 1,468.37 1,026.72 - 1,274.54
M20 147 - 183 1,498.96 - 1,866.05 1,301.10 - 1,619.73
M22 295 3,008.12 2,611.05
M24 370 3,772.89 3,274.87
M27 550 5,608.35 4,868.05
M30 740 7,545.78 6,549.74
LM285
Handling Instructions
Page 4-12
Tightening torques