Epson T-B Series

Regular Inspection 1. Regular Inspection for T3-B T6-B Manipulator
150 T-B series Rev.1
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. These bolts are fastened with the tightening torques
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
Tightening Torque
Refer below for the set screw.
M3
2.0 ± 0.1 N⋅m
(21 ± 1 kgf⋅cm)
Set Screw
Tightening Torque
M4
4.0 ± 0.2 N⋅m
(41 ± 2 kgf⋅cm)
M4
2.4 ± 0.1 N⋅m
(26 ± 1 kgf⋅cm)
M5
8.0 ± 0.4 N⋅m
(82 ± 4 kgf⋅cm)
M5
4.0 ± 0.2 N⋅m
(41 ± 2 kgf⋅cm)
M6
13.0 ± 0.6 N⋅m
(133 ± 6 kgf⋅cm)
M8
32.0 ± 1.6 N⋅m
(326 ± 16 kgf⋅cm)
M10
58.0 ± 2.9 N⋅m
(590 ± 30 kgf⋅cm)
M12
100.0 ± 5.0 N⋅m
(1,020 ± 51 kgf⋅cm)
The bolts aligned on a circumference should be fastened in a crisscross pattern as shown in
the figure
below.
1
5
3
7
2
6
4
8
Bolt hole
Do not fasten all bolts securely at one time. Divide
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
that the bolts are fastened with tightening torques
shown in the table above.