KiSC issued 09, 2007 A
0
Staining or Burning of Commutator
1)
Check to see if the comm utator su rface is stained or bu rnt.
2)
I
f
i
t is bu rnt, gri nd off with fi ne-g rai n sand pa per.
1
Sand
a
e
@
Checking Commutator Wear
1)
Check to see if the contact face of the brush is scored.
2)
If scored, gri nd off with sand paper or on a
l
athe.
3)
If the com m utator diameter m ust be grou nd to below the
al lowable
l
i
i
t, re
lace it.
Commutator diameter
Model
Reference value
Allowable limit
D1102-B
D1302-B
32.7
mm
1.2874
in.
32.5
mm
1.2795
in.
D1402-B
V1502-B
V1702-B
V1902-B
30.0
mm
1.1811
in.
29.0
mm
1.1417
in.
C022 P058
(c
l
B
(a)
Bad
(bl
Good
(d)
Mica
f
)
Good
8
Checking Mica (Undercut)
1)
Check to see the mica unde rcut.
2)
I
f
i
t has h igh m ica, rectif y with a saw blade. As the edge
of the segment wil
l
be rough, chamf er it.
92
Mica depth
Model
Reference value
Allowable limit
01102-B
01302-B
0.5
to
0.8
mm
0.0197
to
0.315
in.
0.2 mm
0.0079
in.
D1402-B
V1502-B
V1702·B
V1902-B
0.5
to
0.9
mm
0.0197
to
0.0354
in.
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