Makita DSC121ZK [10/68] Maintenance
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Makita DSC121ZK [10/68] Maintenance

Makita DSC121ZK [10/68] Maintenance
10 ENGLISH
Removing and installing the cutting dies
NOTICE: Always check the following when
replacing the cutting dies:
— The size of the threaded rod to be cut
matches the size of cutting dies. (The size is
engraved on the cutting dies)
—
The cutting die H and cutting die R are installed in
the correct position. Be sure to install the cutting
die H (engraving ex. W 3/8 H) to the cutter head
and the cutting die R (engraving ex. W 3/8 R) to the
cutter rod. Always use one pair of cutting dies.
Wrong installation results in breakage of the cutting
dies and the tool.
►Fig.7: 1. Cutter head 2. Head bolt 3. Cutting die H
4. Rod bolt 5. Cutting die R 6. Cutter rod
1. Remove the head bolt and rod bolt from cutting die
H and cutting die R using the supplied hex wrench.
2. Remove any dirt or foreign debris from the cutting
die installation points.
3.
Select a pair of cutting dies that matches the size of
the threaded rod and attach cutting die H to the cutter head,
and cutting die R to the cutter rod. After the cutting dies are
installed, securely tighten the head bolt and rod bolt.
NOTICE: There should be a bit of play to the
securely tightened cutting die H and cutting die
R. If there is no play, remove the cutting dies and
clean off any dirt or debris from cutting die instal-
lation points. Cutting while the cutting die H and
cuttingdieRareinstalledindirtyorcloggedttings
may result in chipping or damage of cutting dies.
OPERATION
WARNING: The following types of cutting
may result in cutting dies or components break-
ing and ying off. Since this causes serious acci-
dents, they must never be performed.
— Cutting materials outside the cutting capac-
ity (see SPECIFICATIONS).
— Cutting with cutting dies that do not match
the size of the threaded rod.
— Cutting materials (round or square, etc)
other than threaded rods.
CAUTION: When cutting, check the size of
the threaded rod and always use cutting dies that
match that size. If the sizes do not match, breakage
or damage to the cutting dies and breakdown of the
tool may occur.
►Fig.8: 1. Cutter head 2. Threaded rod 3. Cutting die
H(xeddieonthecutterhead)4. Cutting die
R (moving die on cutter rod)
1. Align the threads of the threaded rod to be cut with
the grooves of cutting die H on the cutter head.
NOTICE: Failure to align the threads of the
threaded rod with the grooves on cutting die H
may result in chipping or damage of the cutting
die.
2. Pull the switch trigger. The cutter rod moves for-
ward and cuts the threaded rod.
3. After the cutting is complete, continue to hold the
switch trigger down. The cutter rod is brought to the full
forward stroke position.
4. Release the switch trigger. The cutter rod will
automatically return to the start position.
NOTICE: Replace deformed or chipped cutting
dies immediately. Deformed or chipped cutting dies
create burrs. Also, they cause an excessive load on
the tool and may cause tool breakage.
NOTICE: Do not cut threaded rods too short.
Cutting to a length shorter than the thickness of the
cuttingdies(13mm(33/64″))maychipordamagethe
cutting dies.
►Fig.9: 1. Cutting die H 2. Threaded rod 3. Cutting
die R 4. Thickness of the cutting die (13 mm
(33/64″))5.Cutlength(13mm(33/64″)or
more)
NOTE:Acutthreadedrodshouldtintoanutwithout
any trouble. However, depending on the material or
precision (grade) of the threaded rod, it may be nec-
essary to remove burs from the starting points of the
threadswithale,etc.inordertottherodintoanut.
Quitting the cutting in the middle
If you want to stop the cutter rod mid-stroke and return
it to the start position, turn the return bulb knob coun-
terclockwise (1/2 turn) and loosen it. The cutter rod will
return to the start position.
►Fig.10: 1. Return bulb
Turn the return bulb knob clockwise to tighten it again to
cut as normal.
NOTICE: Do not turn the return bulb knob any
further than necessary. Turning the return bulb
more than 1-1/2 times counter-clockwise may cause
an oil leak. Use caution, as low oil can cause the tool
to malfunction.
MAINTENANCE
CAUTION: Always be sure that the tool is
switched off and the battery cartridge is removed
before attempting to perform inspection or
maintenance.
NOTICE: Never use gasoline, benzine, thinner,
alcohol or the like. Discoloration, deformation or
cracks may result.
To maintain product SAFETY and RELIABILITY,
repairs,anyothermaintenanceoradjustmentshould
be performed by Makita Authorized or Factory Service
Centers, always using Makita replacement parts.

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