Hitachi G 10SF3 Technical Data And Service Manual page 5

Excellent wear resistance of armature coil
Wear resistance of the armature coil is greatly increased thanks to the smaller air vent to minimize sucking
dust and fine gravel into the machine.
Smaller air vent is
provided near the
commutator.
G 10SF3
(Comparison of wear resistance of armature coils when dust and fine gravel are sucked into the machines)
(Comparison of air vents near the commutator)
10
100
100
Two air vents are provided
near the commutator.
40
60
50
--- 2 ---
13.5
G 10SF2
G10SF3
G10SF2
C
0