Milwaukee 5378-20, 5378-21 manual Extension Cords, Tool Assembly

EXTENSION CORDS

Installing Bits into Keyed Chucks (Fig. 2)

Be sure that the shank of the bit and the

WARNING

Grounded tools require a three wire exten- sion cord. Double insulated tools can use either a two or three wire extension cord. As the distance from the supply outlet increases, you must use a heavier gauge extension cord. Using extension cords with inadequately sized wire causes a serious drop in voltage, resulting in loss of power and possible tool damage. Refer to the table shown to determine the required minimum wire size.

The smaller the gauge number of the wire, the greater the capacity of the cord. For ex- ample, a 14 gauge cord can carry a higher current than a 16 gauge cord. When using more than one extension cord to make up the total length, be sure each cord contains at least the minimum wire size required. If you are using one extension cord for more than one tool, add the nameplate amperes and use the sum to determine the required minimum wire size.

Guidelines for Using Extension Cords

•If you are using an extension cord out- doors, be sure it is marked with the suffix “W-A” (“W” in Canada) to indicate that it is acceptable for outdoor use.

•Be sure your extension cord is prop- erly wired and in good electrical condition. Always replace a damaged extension cord or have it repaired by a qualified person before using it.

•Protect your extension cords from sharp objects, excessive heat and

damp or wet areas.

Recommended Minimum Wire Gauge

for Extension Cords*

Nameplate		Extension Cord Length
Amperes		25'	50'	75'	100'	150'
0 - 2.0		18	18	18	18	16
2.1	- 3.4	18	18	18	16	14
3.5	- 5.0	18	18	16	14	12
5.1	- 7.0	18	16	14	12	12
7.1 - 12.0		16	14	12	10
12.1	- 16.0	14	12	10
16.1	- 20.0	12	10

*Based on limiting the line voltage drop to five volts at 150% of the rated amperes.

chuck jaws are clean. Dirt particles may

cause the bit to line up improperly. Do not

use bits larger than the maximum recom- mended capacity of the drill because gear

damage or motor overloading may result. For best performance, be sure that the bits

are properly sharpened before use.

Fig. 2

Loosen

Tighten

1.	Unplug the tool.
2.	Open the chuck jaws wide enough to
	insert a bit. Allow the bit to strike the
	bottom of the chuck. Center the bit in
	the chuck jaws and tighten the jaws by
	hand to align the bit.
3.	Place the chuck key into each of the
	three holes in the chuck, turning it clock-
	wise to tighten the chuck securely.
	NOTE: Never use a wrench or means

To reduce the risk of injury, always use a side handle when using this tool. Always brace or hold securely.

Adjusting the Side Handle Position (Fig. 3)

Fig. 3

Side handle grip

1.Loosen the side handle by unscrewing the side handle grip until the side handle rotates freely.

2.Rotate the side handle to the desired position.

3.Tighten the side handle grip securely.

Setting the Depth Gauge (Fig. 4)

Fig. 4

Drilling

READ AND SAVE ALL INSTRUCTIONS FOR FUTURE USE.

TOOL ASSEMBLY

other than a chuck key to tighten or

loosen the chuck.

4. To remove the bit, insert the chuck key

into one of the holes in the chuck and

Depth

WARNING

To reduce the risk of injury, always unplug tool before attaching or removing accessories or making adjustments. Use only specifically recommended accessories. Others may be hazardous.

1.Open the chuck jaws fully.

2.Remove the screw inside the chuck head. This is a left hand screw, turn clockwise to remove.

3.Hold the spindle with a wrench (Fig. 1).

4.Insert the drill chuck key inside chuck and loosen clockwise by tapping lightly with a rubber hammer.

turn it counterclockwise.

1.Press in the clamping lever.

2.Slide the depth gauge rod backward or forward until it is set for the desired depth.

NOTE: The drilling depth is the distance between the tip of the bit and the tip of the depth gauge rod.

3.Release the clamping lever.

Removing the Chuck (Fig. 1)

Fig. 1

NOTE: To mount the chuck, reverse the instructions above.

WARNING

To prevent personal injury, always remove the chuck key from the chuck after each use.

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