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Wear if commutator (φ φ D) D)
Wear if commutator (
CHAPTER 3 MOTOR
CHAPTER 3 MOTOR
Under cut of commutator
Under cut of
How to repair of commutator
How to repair of commutator
(1) Grin
(1)
Grind or
d or polish
(2) Unde
(2)
Undercut
rcut the co
(3)
(3) Finis
Finish the sur
h the surface of C
Inspection of insulation
Inspection of insulation
Check the insulation between Commutator and Armature shaft.
Check the insulation between Commutator and Armature shaft.
Clean up the armature by compressed air before checking.
Clean up the armature by compressed air before checking.
I I t t e e m m
1.7 to 1.6 ton model
1.7 to 1.6 ton model
3 W
3 W
1.8 to 2.0 ton model
1.8 to 2.0 ton model
4W
4W
I I t t e e m m
S S t t a a n n d d a a r r d d
0.8 to 0.85 mm
0.8 to 0.85 mm
commutator
(0.032 to 0.034 in.)
(0.032 to 0.034 in.)
polish the
the Comm
Commutat
utator.
or.
the commu
mmutator
tator after
after grin
grinding
ding. .
face of Comm
ommutato
utator with a sa
r with a sand pape
φ φ D D
1. 1.
S S t t a a n n d d a a r r d d
L L i i m m i i t t
30 mm
30 mm
29 mm
29 mm
(1.18 in.)
(1.18 in.)
(1.14 in.)
(1.14 in.)
40 mm
40 mm
39 mm
39 mm
(1.57 in.)
(1.57 in.)
(1.54 in.)
(1.54 in.)
40 mm
40 mm
39 mm
39 mm
(1.57 in.)
(1.57 in.)
(1.54 in.)
(1.54 in.)
nd paper (#400)
r (#400). .
CAUTION
CAUTION
502735
502735
1
1
2
2
3-21
3-21
502736
502736
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