Hitachi C 12FSA Technical Data And Service Manual

--- 6 ---
Specifically, this revolution range A lies
between the no-load speed (4,000/min.) and a
little lower speed. At the start of sawing,
the rotations drop to within range A ,
so that the saw blade vibrates locally resulting
in uneven cut surfaces. The electronic
control provided in the C 12FSA serves to
maintain relatively constant rotation in a
range at which runout of the saw blade is
minimized, even at the no-load speed.
This minimizes surface unevenness during
the first part of the cut. Besides the
outstanding feature of cutting speed which
is independent of load variation over a
wider range of operation (for a smooth cut surface
with few saw marks), electronic control also
offers advantages of eliminating the sharp
metallic noise due to resonance of the saw
blade as well as noises during no-load operation
because the no-load speed is maintained at 3,200 rpm. (See Table 6.)
Comparison of surface roughness
No-load revolution when
uncontrolled (4,000 rpm)
Revolution (rpm)
Fig. 14
Maker
Model
Item
HITACHI
C 12FSA
No-load sound pressure level
(1 m distance from the front)
87
Table 6
(Unit: dB (A))
Table 7
American pine
Height 45 x width 300 (Height 1-25/32" x width 11-13/16")
with water content of 15 to 18%
Saw blade
Left bevel 45˚ press cutting + slide cutting
Outer diameter
Cutting time (sec.)
Cutting method
Workpiece material
No. of teeth
Chip width
Saw blade thickness
Item
Maker
Model
Cutting
conditions
15
305 (12")
96
1.8 (0.071")
2.3 (0.091")
255 (10")
90
1.8 (0.071")
2.3 (0.091")
HITACHI
C 12FSA
HITACHI
C 10FS

Hitachi C 12FSA Specifications

General

Brand	Hitachi
Model	C 12FSA
Category	Saw
Language	English