Hitachi CM 12Y Operating Instructions Manual page 7

OPTIONAL ACCESSORIES (sold separately)
(1) Diamond wheels for dry cutting (segment type)
Type
For concrete and masonry
For abrasive materials
(2) Cutting wheels
Type
Metal cutting wheel
Masonry cutting wheel
(3) Wheel washer (A) (hole diameter 25.4mm)
Optional accessories are subject to change without notice.
APPLICATION
○ Cutting or scribing concrete
○ Cutting or scribing tile
○ Cutting or scribing stone
○ Cutting or scribing roof tile
○ Cutting steel
PRIOR TO OPERATION
1. Power source
Ensure that the power source to be utilized conforms
to the power requirements specifi ed on the product
nameplate.
2. Power switch
Ensure that the power switch is in the OFF position.
If the plug is connected to a power receptacle while
the power switch is in the ON position, the power tool
will start operating immediately, which could cause a
serious accident.
3. Extension cord
When the work area is removed from the power source,
use an extension cord of suffi cient thickness and rated
capacity. The extension cord should be kept as short as
practicable.
4. Checking and installing the diamond wheel
Check the diamond wheel is a specifi ed one and is not
cracked, broken or bent. Check the diamond wheel is
installed securely. For installation, refer to "Installing/
removing diamond wheel".
5. Check that the knob used to secure the wheel
guard is tight.
Make sure that the knob that secures the wheel guard is
adequately tight.
If this knob is loose, it may result in injury to the operator.
(Fig. 4)
INSTALLING DUST COLLECTION HOSE
When cutting a material which generates cutting dust, use
the dust collection hose as follows:
(1) Remove the rubber cap and install the accessory hose.
(Fig. 1)
(2) Install the dust collector hose for the power tool in the
accessory hose. (Fig. 1)
Wheel dia. (mm)
305
Wheel dia. (mm)
305
Code No. Thickness (mm)
985618
985619
Code No. Hole dia. (mm)
985609 22.2
985608 25.4
985611 22.2
985610 25.4
CAUTION
○ Do not use the dust collection hose when cutting metal.
○ Always install a rubber cap on the dust collection
adapter when the dust collection hose is not used.
INSTALLING/REMOVING DIAMOND WHEEL
1. Installation
(1) Wipe the cutting dust from the spindle and washers.
(2) Make sure the rotation direction of the diamond wheel
conforms to the direction indicated on the wheel guard
and install the diamond wheel as shown in Fig. 2 and 3.
• Install the wheel washer (B) (silver) on the inner side
when the hole diameter of the diamond wheel is
22.2 mm.
• Install the wheel washer (C) (black) on the inner side
when the hole diameter of the diamond wheel is
20.0 mm.
(3) Press the lock pin and secure the spindle. Tighten the
bolt adequately with the provided wrench. (Fig. 5 and 6)
NOTE
○ Always use the provided wrench to secure the bolt.
○ Be careful because the bolt tightens to the left
(counterclockwise direction) to prevent it from being
loosened during cutting. (Fig. 6)
2. Removal
Remove the bolt with the provided wrench and remove
the diamond wheel. (Fig. 6)
CUTTING
1. Wheel guard adjustment (Fig. 4)
Adjust the wheel guard angle with the knob so dust and
debris from the material or sparks do not contact the
operator during the cutting operation.
2. Cutting procedures (Fig. 7)
(1) Place this tool on the material to be cut and align the
premarked line and the diamond wheel.
The cutting can be performed smoothly if you cut
straight ahead on the scribed line in the initial cut.
(2) Turn on the switch when the diamond wheel is not
touching the material to be cut.
CAUTION
○ Always check the diamond wheel before starting work.
Never use a diamond wheel which is cracked, broken or
bent.
English
Hole dia. (mm)
2.8
22.2
3.0
per pkg.
10 pcs.
7