MYS450L
E1101000117GB01 55
* Under normal conditions, the reduction gear units shall be greased only when the motor is
replaced. However, in case of severe working conditions (such as high duty, high speeds,
large payloads, etc.), the reduction gear units must be greased every 10,000 hours.
9.4 Tightening the screws
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.
Table 13: Greasing Popints
Greasing part Greasing Interval Grease Refer to:
θ1
θ2
Reduction gear
units
In the replacement of motor* SK-1A Maintenance:
10.1 Replacing the θ1 reduction gear
unit
10.2 Replacing the θ2 reduction gear
unit
Z Ball screw
spline unit
First time: after 50 km operation
2nd or more: after 100 km operation
AFB Maintenance: 10.10 Greasing the Ball
Screw Spline Unit
U Backlash-less
gear
In Z greasing AFB Following indication
Table 14: Tightening torque
Screw Tightening torque
M3 245 Ncm
M4 490 Ncm
M5 980 Ncm
M6 1,760 Ncm
M8 3,720 Ncm
M10 7,350 Ncm
M12 12,740 Ncm
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