Maintenance 2. General Maintenance
76
E2C Rev.6
2.4 Tightening Hexagon Socket Head Cap Bolts
Hexagon socket head cap bolts are used in places where mechanical strength is required.
(A hexagon socket head cap bolt will be called a “bolt” in this manual.) 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
M3 245
N
⋅
cm (25 kgf
⋅
cm)
M4 490
N
⋅
cm (50 kgf
⋅
cm)
M5 980
N
⋅
cm (100 kgf
⋅
cm)
M6 1,760
N
⋅
cm (180 kgf
⋅
cm)
M8 3,720
N
⋅
cm (380 kgf
⋅
cm)
M10 7,350
N
⋅
cm (750 kgf
⋅
cm)
M12 12,740
N
⋅
cm (1,300 kgf
⋅
cm)
We recommend that 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.
Summary of Contents for E2C Series
Page 1: ...SCARA ROBOT E2C series MANIPULATOR MANUAL Rev 6 EM069R1409F ...
Page 2: ...MANIPULATOR MANUAL E2C series Rev 6 ...
Page 8: ...vi E2C Rev 6 ...
Page 14: ......
Page 82: ......
Page 92: ...Maintenance 2 General Maintenance 80 E2C Rev 6 ...
Page 118: ...Maintenance 4 Replacing the Cable Unit 106 E2C Rev 6 ...
Page 194: ...Maintenance 11 Replacing the Signal Relay Board 182 E2C Rev 6 ...