Manual Hitachi DC120VA (page 7 of 38) (English, German, Dutch, French, Italian, Spanish)

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English

TABLE 1

Shift lever indication 1 2

[Low speed gear] [High speed gear]

Dial

Materials to be drilled Types of drills

Drill

ABCDEABCDE

diameters

Brick, Block Diamond φ27

core bit

φ65

φ152

ALC t3.0 Hole saw φ27

φ65

φ120

Steel Hole saw φ15

SPCC t3.0

φ55

Stainless steel Hole saw φ15

t1.6

φ55

Wood Hole saw φ27

t50

φ65

φ120

Steel SPCC t3.0 Drill φ13

Wood t50 Drill φ30

(6) If the core bit starts to vibrate and when the core bit

begins to break through the material, reduce pressure

immediately.

(7) After use, store the core bit carefully in its box and

remember that it is a diamond core bit.

cDrilling method by using Pilot Spigotv

For easy positioning, carry out the following steps

when using a diamond core bit.

(1) Make a pilot hole at the center position of the material

to be drilled with a 13 mm stone drill bit.

(2) Attach a pilot spigot to a diamond core bit.

(3) Align the pilot spigot to the pilot hole and begin the

drilling operation to make a guide groove.

(4) When making the guide groove, temporarily stop the

drilling operation and remove the pilot spigot.

(5) Align the diamond core bit with the guide groove and

start the drilling operation again.

CAUTION

⅜ When drilling with a diamond core bit, there will be a

high force of reaction load to your hands. Make sure

to hold the handle of the main body and the side

handle.

Safety-Release Clutch

This tool is equipped with a positive type Safety-

Release Clutch. The clutch will slip when a certain

torque level is required, causing the motor to

disengage from the output shaft. When this happens,

the chuck will stop turning.

CAUTION

⅜ Immediately pull away the main body when the

Safety-Release Clutch starts its operation.

⅜ Do not continue to operate the tool for more than two

seconds while the clutch is slipping.

⅜ Do not let the Safety-Release Clutch activate too

frequently.

5. Drilling with a conventional drill bit

(1) Drilling in wood

Use a woodworking drill bit. However, use an

metalworking drill bit when drilling a hole which is

less than 6.5 mm in diameter. The usable drill bit

diameter is maximum 30 mm.

(2) Drilling in mild steel or plastics

Use a conventional metalworking drill bit. The usable

drill bit diameter is minimum 1.2 mm and maximum

13 mm.

CAUTIONS

⅜ Pressure:

Drilling will NOT be accelerated by placing heavy

pressure on the drill. Such action will only result in a

damaged drill bit, decreased drilling efficiency, and/

or shortened service life of the drill.

⅜ Using a large diameter drill bit:

The larger the drill bit diameter, the larger the reactive

force on your arm. Be careful not to lose control of

the drill because of this reactive force. To maintain

firm control, establish a good foot-hold, hold the drill

tightly with both hands, and ensure that the drill is

vertical to the material being drilled.

⅜ When drilling completely through the material:

When the drill bit bores completely through the

material, careless handling often results in broken

drill bit or damage to the drill body itself due to the

sudden movement of the drill.

Always be alert and ready to release pushing force

when drilling through the material.

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Hitachi DC120VA Manual

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