Harbor Freight Tools 3/8 in. Variable Speed Reversible Drill Manual descarregar pdf (Página 11)

Page 11For technical questions, please call 1-888-866-5797.Item 60614

SAFETYOPERATIONMAINTENANCE SETUP

The Drilling Operation

1. Use only well-sharpened bits that are in

good condition and appropriate to task.

2. Use firm pressure when drilling, but do not press

too hard. Too much pressure will not help the

process and will cause bit to overheat, may

cause bit to bend or break, cause undue strain

on the tool, and may damage the bit or work

piece. Pressing too hard may stall the motor.

3. WARNING! If motor stalls, release Trigger

immediately to prevent damage to the tool.

4. Always drill in a straight line, using built-

in level as a guide. Bending or twisting bit

while drilling may cause the bit to bend or

break and may damage the work piece.

5. Back off your pressure when you are

about to penetrate the work piece.

6. Keep the motor running when pulling the bit out of

a completed hole to prevent the bit from jamming.

Metal Drilling

1. Use high speed steel, carbide or

specialty bits for metal drilling.

2. Secure the work piece to keep it from

moving during the drilling operation.

3. Use a punch to create a dimple for the bit to start.

4. Start by drilling slowly to keep bit from

moving away from your starting point.

5. As the hole is established, increase tool speed.

Do not go so fast or use so much pressure that

the bit heats up. This can damage the bit and

create an irregular hole. For hard metal or thick

pieces, use cutting oil to keep the bit cool.

6. Since drilling in metal is a slow operation, you

may lock the Trigger in the ON position to

maintain a constant speed and reduce fatigue.

7. When drilling large holes in metal, start

by drilling a smaller pilot hole, then using

a larger bit for the final size hole.

Wood Drilling

1. Use high carbon bits or bits specially

designed for wood drilling, such as

brad point, spade bits, Forstner bits, etc.

2. Secure the work piece to keep it from

moving during the drilling operation.

3. Start by drilling slowly to keep the bit from

moving away from your starting point.

Increase speed as the hole is established.

4. To prevent or reduce “break out” when the bit

penetrates the work piece, clamp a piece of

scrap material to the back of the work piece.

5. Do not lock the Trigger in the ON position,

as the bit can easily jam in wood and

the motor must be stopped quickly.

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Harbor Freight Tools 3/8 in. Variable Speed Reversible Drill Manual Página 11

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