Harbor Freight Tools 3670 Work Piece and Work Area Set Up, General Operating Instructions

2.Open the jaws enough to allow the bit to slide into the Chuck. Turn the front ring counterclockwise to tighten the jaws on the bit shank.

3.CAUTION! Be sure the bit is centered on the jaws before tightening firmly (be sure to wear heavy-duty work gloves.) Tug on bit to make sure it is securely attached.

4.WARNING! Do not use dull or damaged bits. Doing so can cause undue stress on the Drill, leading to possible property damage and/or personal injury.

Work Piece and Work Area Set Up

1.Designate a work area that is clean and well-lit. The work area must not allow access by children or pets to prevent distraction and injury.

2.Route the power cord along a safe path to reach the work area without creating a tripping hazard or exposing the power cord to possible damage. The power cord must reach the work area with enough extra length to allow free movement while working.

3.Secure loose work pieces using a vise or clamps (not included) to prevent movement while working.

4.There must not be objects, such as utility lines, nearby that will present a hazard while working.

General Operating Instructions

1.Plug Power Cord (21) into suitable outlet.

2.Use the Forward/Reverse Switch (30) above the Trigger (32) to determine the rotation direction of the Chuck. Slide it to the right side for reverse Chuck rotation. Slide to the left side for forward Chuck rotation. See Figure 1. CAUTION! Allow

Chuck to come to complete stop prior to changing its direction of rotation.

3.Squeeze the Trigger (32) to start the tool. The Trigger has a variable speed feature. Pressing it lightly will make the tool operate slowly; pressing more will cause the tool to operate faster.

Note: The Speed Limiter Dial can be adjusted to limit the travel of the Trigger. Turning the dial counterclockwise (-) will limit the Trigger movement to low speed settings. Turning the dial clockwise (+) will allow for full Trigger range and faster speeds.

4.To lock the Trigger in the ON position, squeeze the Trigger, pressing in the

Lock ON button, and then releasing the Trigger. The tool will operate continuously. To stop the tool, squeeze and release the Trigger.

5.To prevent accidents, turn off the tool and disconnect from power source after use. Clean, then store the tool indoors out of children’s reach.

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

Rev 10g

SKU 3670 For technical questions, please call 1-800-444-3353. Page 9