Epson C Series Maintenance Manual page 461

2.4 Tightening Hexagon Socket Head Bolts
Hexagon socket head cap bolts (hereinafter, "bolts") are used in places where mechanical
strength is required. These bolts are fastened with the tightening torque shown in the
following tables.
When it is required to refasten the bolts in some procedures in this manual (except special
cases as noted), use a torque wrench so that the bolts are fastened with appropriate tightening
torque as shown below.
Bolt
M3
M4
M5
M6
M8
M10
M12 100.0 ± 5.0 N⋅m (1,020 ± 51 kgf⋅cm)
It is recommended to fasten the bolts aligned on a circumference in a crisscross pattern as
shown in the figure below.
Bolt hole
C Series Maintenance Manual Rev.2
Tightening Torque
2.0 ± 0.1 N⋅m (21 ± 1 kgf⋅cm)
4.0 ± 0.2 N⋅m (41 ± 2 kgf⋅cm)
8.0 ± 0.4 N⋅m (82 ± 4 kgf⋅cm)
13.0 ± 0.6 N⋅m (133 ± 6 kgf⋅cm)
32.0 ± 1.6 N⋅m (326 ± 16 kgf⋅cm)
58.0 ± 2.9 N⋅m (590 ± 30 kgf⋅cm)
1
5
8
3
6
7
2
C12 Maintenance 2. General Maintenance
See below for the set screw.
Set Screw
M4
M5
M6
Do not fasten all bolts securely at one time.
Divide the number of times to fasten the bolts into
two or three and fasten the bolts securely with a
hexagonal wrench. Then, use a torque wrench to
4
fasten the bolts with tightening torques shown in the
table above.
Tightening Torque
2.4 ± 0.1 N⋅m (26 ± 1 kgf⋅cm)
3.9 ± 0.2 N⋅m (40 ± 2 kgf⋅cm)
8.0 ± 0.4 N⋅m (82 ± 4 kgf⋅cm)
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