Makita 9523NB Technical Information page 2

Extremely quiet (to see the following comparison of no load noise)
Makita 9523NB:83dB
Hitachi G10SF :88dB (total noise of three 9523MB's = noise of one G10SF
Slim/trim body 56mm wide
for easy, comfortable gripping thanks to the slim but
endurable S55-type motor
Labyrinth structure
to protect ball bearings from dust
More endurable motor:
Armoured wite special varnish
on armature coil and taping
on field coil for protection
against dust and wire snap
Housing
Armature
Labyrinth structure
Diameter of field core
ø
55 ø
55
42.5
48
S55-type N55-type
for
( )
N9501B
9540