3/8” VARIABLE SPEED REVERSIBLE DRILL Model 3670 Set up and Operating Instructions Visit our website at: http://www.harborfreight.com Read this material before using this product. Failure to do so can result in serious injury. Save this manual. Copyright© 2003 by Harbor Freight Tools®. All rights reserved. No portion of this manual or any artwork contained herein may be reproduced in any shape or form without the express written consent of Harbor Freight Tools.
NOTICE is used to address practices not related to personal injury. Save This Manual Keep this manual for the safety warnings and precautions, assembly, operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the back of the manual near the assembly diagram (or month and year of purchase if product has no number). Keep this manual and the receipt in a safe and dry place for future reference.
ranges and refrigerators. There is an increased risk of electric shock if your body is grounded. up or carrying the tool. Carrying power tools with your finger on the switch or energizing power tools that have the switch on invites accidents. c. Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock. d. Remove any adjusting key or wrench before turning the power tool on.
with the switch is dangerous and must be repaired. 1. Hold Drill by insulated gripping surfaces when performing an operation where the Drill may contact hidden wiring or its own cord. Contact with a “live” wire will make exposed metal parts of the Drill “live” and shock the operator. 2. Maintain labels and nameplates on the tool. These carry important safety information. If unreadable or missing, contact Harbor Freight Tools for a replacement. 3. Avoid unintentional starting.
grounded. Ground Fault Circuit Interrupter (GFCI) should also be implemented – it prevents sustained electrical shock. 9. WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities, contains chemicals known [to the State of California] to cause cancer, birth defects or other reproductive harm.
Save these instructions. Grounding To prevent electric shock and death from incorrect grounding wire connection: Check with a qualified electrician if you are in doubt as to whether the outlet is properly grounded. Do not modify the power cord plug provided with the tool. Never remove the grounding prong from the plug. Do not use the tool if the power cord or plug is damaged. If damaged, have it repaired by a service facility before use.
Extension Cords 1. Grounded tools require a three wire extension cord. Double Insulated tools can use either a two or three wire extension cord. 2. 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. (See Table A.) 3. 4. 5. The smaller the gauge number of the wire, the greater the capacity of the cord.
Specifications Electrical Input 120 V~ / 60 Hz / 3.1 A Motor Speed 0-3000 (Variable); Reversible Chuck Capacity 1/16” to 3/8” Chuck Type Keyless E194601 Functions Lock Button (29) Forward/ Reverse Switch (30) Speed Limiter Dial (31) Unpacking When unpacking, make sure that the item is intact and undamaged. If any parts are missing or broken, please call Harbor Freight Tools at 1-800-444-3353 as soon as possible. Instructions for putting into use Figure 1 1.
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.
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.
loose hardware, misalignment or binding of moving parts, cracked or broken parts, damaged electrical wiring, and any other condition that may affect its safe operation. 2. 3. After Use, wipe external surfaces of the tool with clean cloth. Do not use solvents. Inspect the Chuck and remove any dirt or debris. 4. PERIODICALLY check the Mounting Screws (3) and tighten if necessary. 5.
PLEASE READ THE FOLLOWING CAREFULLY The manufacturer and/or distributor has provided the parts list and assembly diagram in this manual as a reference tool only. Neither the manufacturer or distributor makes any representation or warranty of any kind to the buyer that he or she is qualified to make any repairs to the product, or that he or she is qualified to replace any parts of the product.
ASSEMBLY DIAGRAM 3 5 27 6 26 7 8 9 4 11 28 12 13 15 14 10 2 17 31 18 30 19 16 20 32 29 22 23 24 25 SKU 3670 For technical questions, please call 1-800-444-3353.
LIMITED 90 DAY WARRANTY Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability standards, and warrants to the original purchaser that this product is free from defects in materials and workmanship for the period of 90 days from the date of purchase.
