Hitachi DS 18DMR Service Manual page 8

4-1-7. Externally replaceable carbon brushes and separate-type motor
The carbon brushes are replaceable from the outside. In addition, the armature is singly replaceable thanks to
the adoption of the separate-type motor that is the same as a driver drill with a power cord. Thus the Models
DS 18DMR and DS 14DMR are easier to maintain.
Carbon brush
Armature
Magnet
Case-type motor (carbon brushes are built in)
Separate-type motor
[Conventional model]
[Models DS 18DMR and DS 14DMR]
4-1-8. New flat battery
The battery is flat enough to stand the Model DS 18DMR upright stability. The conventional Hitachi 18-V batteries
are also usable.
4-1-9. Others
The Models DS 18DMR and DS 14DMR have the following features common to the previous model.
The terminal is movable according to the movement of the battery to prevent damage to the contact portion.
The contact between the housing and the battery is changed from line contact to surface contact to minimize
rattling due to wear.
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