GreenWorks HMG405, Operator'S Manual

3. Put the forward/reverse siwtch in the OFF (center lock)

position to help decrease the possibility of accidental
starting when not operating.

WARNING

Release the trigger and allow the machine to come to a
complete stop.

WARNING

Let the chuck to come to a complete stop before changing
the direction of rotation.

NOTE

The machine does not operate until the forward / reverse
switch is pushed fully to the left or right.

9.4

SELECT THE MODE

To change the operation mode, push the release button and
turn the mode selection switch to the correct position until it
clicks.

The machine is used for two functions: drill, hammer drill

．

NOTE

Hammer drilling mode can destroy the structure of the
machine when used for fastening or drilling without SDS
Plus bits.

Use bits only with hard metal and SDS Plus shaft only.

NOTE

When hammer drilling, do not apply too much pressure.

9.5

DRILL MATERIALS

WOOD DRILLING

For maximum performance, use high speed steel bits for
wood drilling.
1. Operate the machine at a very low speed to prevent the

bit from slipping off the starting point. Increase the speed
as the drill bit bites into the material.

2. When drilling through holes, put a piece of wood behind

the workpiece to prevent ragged or splintered edges on
the rear side of the hole.

METAL DRILLING

For maximum performance, use high speed steel bits for
metal or steel drilling.

1. Operate the machine at a very low speed to prevent the

bit from slipping off the starting point.

2. Hold a speed and pressure which let cut without

overheating the bit. Apply too much pressure can:
Overheat the drill; Wear the bearings; Bend or burn bits;
and Produce off-center or irregular-shaped holes.

3. When drilling large holes in metal, start with a small bit,

then complete with a large bit. Also, lubricate the bit with
oil to improve drilling action and increase bit life.

MASONRY DRLLING

For maximum performance, use carbide-tipped masonry
impact bits when drilling holes in brick, tile, concrete, etc..

1. Move adjustment button on hammer drill left for hammer

mode.

2. Apply light pressure and medium speed for best results in

brick.

3. When drilling holes in tile, practice on a scrap piece to

find the best speed and pressure. Operate the machine at a
very low speed to prevent the bit from slipping off the
starting point.

10

MAINTENANCE

WARNING

Remove the battery pack from the machine before
maintenance.

WARNING

Do not use strong solvents or detergents on the plastic
housing or components.

10.1 FIT AND CHANGE THE SDS BIT

This machine is equipped with an SDS Plus connection
system.
1. Clean the bit and grease it with machine grease before

inserting it into the chuck.

2. Pull back the clamp collar and hold it.
3. Push and turn the dust-free tool into the bit holder as far

as it can go.

4. Release the clamp collar to lock the bit.
5. Examine that bit has locked by pulling on it.

9

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