(3) Environmental conditions
Ambient temperature: 0 to +40°C
Storage temperature: -20 to +60°C
Humidity: 20% to 80% RH (non-condensing)
(4) Load coupling
True alignment of motor and driven machine is essential to prevent vibration, reduced
bearing and coupling life, or shaft and bearing failures.
Use flexible coupling with direct drive. The alignment should be made in
accordance with Fig. 10.2.
When mounting coupling, ease the impact on the shaft and avoid the excessive
force on the bearing.
®.
(!) Measure the gap between the straightedge and coupling halves at four equidistant
points of the coupling. The each reading should not exceed 0.03 mm (0.0012 in.).
@ Align the shafts.
(_) Measure the gap between the coupling faces at four equidistant points around
the coupling rim with thickness gage. The maximum variation between any two
read ings should nol, exceed 0.03 mm (0.0012 in.)
Fig. 10.2 Alignment of Coupling
(5) Allowable bearing load
Avoid both excessive thrust and radial loads to the motor shaft. If unavoidable,
never exceed the values in Table 3.9.
When mounting the gear, coupling and pulley, ease the impact on the shaft and
avoid excessive force on the bearing. (98m/s2(10G)max;
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