－
21
－
(5) Wear limits of major components
Component
Wear limit or service life
Gear
Replace if gear tooth thickness is reduced 20%
or
larger.
Ball bearing
There should be free from damage, detrimental
flaw and foreign sound during operation.
Brake
mechanism
Brake action should be smooth and powerful.
Brake disk
Refer to the description on page 13.
Key,spline,
serration
There should be free from deformation, excess play and wear.
Fixed core
There should be a gap between movable core and fixed core
(When they are fit with each other).
Cable
There should be no external damage and deterioration.
Insulation in
cireuit
0.2M
Ω
for 200V class motor
0.4M
Ω
for 400V class motor
ST-D
SP-D
･
Wear if wheel
･
Flange thickness
････
Wear limit is 50% of initial flange thickness.
Wheel diameter
(mm)
Model
Initial Limit
Remarks
SP-0.2D Type
90 87
SP-0.4D Type
100 97
ST-0.2D Type
140 135
ST-0.4D Type
ST-0.4D-L Type
180 174
ST-0.75D Type
ST-0.75D-W Type
ST-0.75D-L Type
250 242
ST-2.2D-W Type
330 320
Wheel
ST-D-U
·Replace if urethane rubber cracks or chips.
·Side roller
････
replace if diameter is reduced to 100mm
(initial diameter: 110mm)
Tooth thickness
Amount of
wear
Pitch circle
dia
m
e
ter
Worn serface
●
Replace when A become
equal to B.
We
a
r l
im
it
････
Wear limit is 3% of wheel initial diameter.
