Hitachi C 12FSA Technical Data And Service Manual page 8

The purpose of right and left bevel cutting is to achieve accurate 45˚ bevel
cutting for better miter joint work. Generally, window frames are made by
jointing 45˚ bevel (miter) cut workpieces. (See Fig. 6.)
(a) In the case of C 8FB2, miter cutting is performed by the left bevel
cutting function only as shown in Fig. 7. Therefore, the workpiece
must be turned around in the second process and the reference plane,
that is, the surface of the workpiece which contacts to the fence is
opposite to that of the first process.
(b) In the case of C 12FSA, more accurate miter cutting is performed because the same reference plane (surface
of the workpiece which contacts to the fence) is used in both the first and second processes as shown in Fig.
8. In addition, the working efficiency is improved and long workpieces can be handled in tight places because
there is no need to turn around the workpieces.
First process
Reference plane in the first process
(Surface of the workpiece which contacts
to the fence)
Saw blade
Second process
Reference plane in the second process
(Surface of the workpiece which
contacts to the fence)
Fig. 7 Miter cutting by C 8FB2
2 Maximum cutting dimension
Maker
Model
Max. cutting
dimension
Left 45˚
Height x Width
(H x W)
Right 45˚
Height x Width
(H x W)
Workpieces as wide as shown in Table 4 can be bevel-cut by tilting the saw blade.
Turn around
Reference plane in the
first process
(Unit: mm)
Table 4
HITACHI
C 12FSA
70 x 305 (2-3/4" x 12")
75 x 260 (2-15/16" x 10-1/4")
with aux. board width 20 (25/32")
40 x 305 (1-9/16" x 12")
45 x 260 (1-25/32" x 10-1/4")
with aux. board width 20 (25/32")
First process
Reference plane in the first process
(Surface of the workpiece which
contacts to the fence)
Second process
Same reference plane as the first process
Fig. 8 Miter cutting by C 12FSA
Workpiece
Right 45˚
--- 4 ---
Window frames
Miter cutting
(45˚ bevel cutting)
Fig. 6
Left 45˚
Width (W)
Height (H)
Fig. 9