MAINTENANCE MANUAL
17
STE 85357
1.5
Clamping Hexagon Socket Head Cap Screws and Set screws
This robot uses hexagon socket head cap screws at places requiring mechanical
strength. At the time of factory-assembly, Loctite is applied and each screw is
tightened with the following clamping torque.
When these screws and set screws are tightened again according to the inspection
and maintenance as stipulated in this manual, use a torque wrench or torque driver,
and Loctite (medium strength) to assure the appropriate clamping torque.
The places which do not fall under the table below are detailed in the paragraph of
the replacement procedures.
Table 1.4 Clamping Torque
Hexagon socket
head cap screw
M3
M4
M5
M6
M8
M10
M12
Set screws
M3
M4
M5
M6
M8
M10
M12
M16
M20
Clamping
torque
1.5N
･
m
1.8N
･
m
2.0 N
･
m
4.7 N
･
m
9.0 N
･
m
15 N
･
m
37 N
･
m
75 N
･
m
128 N
･
m
For the screws arranged on a circle for mounting the reduction gear, etc., tighten
them in the diagonal order, as shown below.
Fig.1.2 Tool set bolts
DO NOT tighten one (1) screw at a time. Tighten each screw in multiple steps,
using a hexagonal wrench key, and secure with appropriate clamping torque by
means of a torque wrench.
1
8
7
6
5
4
3
2
