Tightening Hexagon Socket Head Cap Bolts - Epson T-B Series Manual

Regular Inspection 1. Regular Inspection for T3-B T6-B Manipulator

1.4 Tightening Hexagon Socket Head Cap Bolts

Hexagon socket head cap bolts (herein after referred to as bolt) are used in places where
mechanical strength is required.
shown in the following table.
When it is necessary to refasten these bolts in some procedures in this manual (except special
cases as noted), use a torque wrench so that the bolts are fastened with the appropriate
tightening torques as shown below.
Bolt
M3
M4
M5
M6
M8
M10
M12
The bolts aligned on a circumference should be fastened in a crisscross pattern as shown in
the figure below.
Bolt hole
150
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)
100.0 ± 5.0 N⋅m (1,020 ± 51 kgf⋅cm)
1
5
3
7
2
These bolts are fastened with the tightening torques
Refer below for the set screw.
Set Screw
M4
M5
Do not fasten all bolts securely at one time. Divide
8
the number of times that the bolts are fastened into
two or three and fasten the bolts securely with a
hexagonal wrench. Then, use a torque wrench so
4
that the bolts are fastened with tightening torques
shown in the table above.
6
Tightening Torque
2.4 ± 0.1 N⋅m (26 ± 1 kgf⋅cm)
4.0 ± 0.2 N⋅m (41 ± 2 kgf⋅cm)
T-B series Rev.1