DeWalt DC390B - User Manual

The DEWALT DCXXX is a cordless circular saw designed for cutting various materials, primarily wood. It operates on a battery pack, providing portability and freedom from power cords. The saw is equipped with a lower blade guard for safety, depth and bevel adjustment mechanisms for versatile cutting, and a kerf indicator for accurate guidance. It is intended for general purpose cutting, smooth wood cutting, and non-carbide, plywood/vinyl siding cutting, depending on the blade used.

Important Technical Specifications:

Model: DCXXX 6 1/2" (165mm) Cordless Circular Saw
Blade Diameter: 6-1/2" (165mm)
Power Source: DEWALT battery packs (specific models listed: DC9071, DC9091, DC9096, DC9182, DC9280, DC9360, DC9180, DCB120, DCB127, DCB201, DCB203, DCB207, DCB200, DCB204, DCB205)
Charger Compatibility: DEWALT chargers (specific models not detailed but implied to be compatible with listed battery packs)
Bevel Adjustment: 0° to 50°
Depth Adjustment: Allows blade to protrude 1/2 of a tooth below the material for efficient cutting.
Blade Arbor Holes: Designed for correct size and shape (diamond versus round) to prevent eccentric running.

Usage Features:

Personal Safety: Users are instructed to stay alert, wear eye protection (ANSI Z87.1, CAN/CSA Z94.3), hearing protection (ANSI S12.6, S3.19), and respiratory protection (NIOSH/OSHA/MSHA) when operating the tool, especially in dusty conditions. Loose clothing, jewelry, and long hair should be kept away from moving parts.
Work Area Safety: The work area must be clean, well-lit, and free from explosive atmospheres. Children and bystanders should be kept away.
Electrical Safety (for chargers): Charger plugs must match outlets. Avoid body contact with earthed surfaces. Do not expose chargers to rain or wet conditions. Use extension cords suitable for outdoor use when operating outdoors, and a GFCI-protected supply in damp locations.
Battery Pack Installation/Removal: The battery pack slides into the tool handle until it snaps into place. Removal requires pressing release buttons and pulling the pack out. The switch lock-off button (A) should be engaged before installing or removing the battery.
Switch Operation: The trigger switch (B) turns the motor ON when pulled and OFF when released. There is no provision to lock the switch in the ON position.
Blade Changing: Involves placing inner and outer clamp washers, ensuring correct blade rotation direction, and tightening the blade clamping screw (H) using the blade lock (K) and blade wrench. The blade lock should never be engaged while the saw is running.
Cutting Depth Adjustment: The depth adjustment knob (D) is loosened to move the shoe and set the desired depth, then retightened.
Bevel Angle Adjustment: The bevel adjustment knob (J) is loosened to tilt the shoe to the desired angle, then retightened.
Kerf Indicator: Located at the front of the saw shoe, it helps guide the saw along cutting lines, aligning with the left (outer) side of the blade.
Workpiece Support: Emphasizes supporting the workpiece firmly with clamps or a stable platform, positioning the body to either side of the blade (not in line), and supporting the board or panel near the cut to prevent kickback.
Ripping: The use of a rip fence is recommended for cutting wider boards into narrower strips along the grain.
Pocket Cutting: Requires adjusting cutting depth, tilting the saw forward, retracting the lower blade guard, lowering the shoe until blade teeth almost touch the cutting line, releasing the guard, starting the motor, and gradually lowering the saw until the shoe rests flat on the material.
Kickback Prevention: Avoid blade binding, improper depth setting, blade twisting, and using dull or dirty blades. Maintain a firm grip and proper body position.
Battery Charging: DEWALT chargers are designed for 120-volt household electrical power. The charging process is indicated by a blinking red light, which becomes solid when fully charged. The "Automatic Tune-Up™" mode equalizes individual cells for peak capacity, lasting up to 8 hours after the initial charge.
Hot/Cold Pack Delay: Some chargers feature this to suspend charging if the battery is too hot, resuming once it cools to ensure maximum battery life.
Problem Power Line Indicator: Some chargers will flash the red light with two fast blinks followed by a pause if the power source is out of limits.

Maintenance Features:

General Maintenance: Power tools should be maintained by checking for misalignment or binding of moving parts, breakage, and other conditions affecting operation. Damaged tools must be repaired before use. Cutting tools should be kept sharp and clean.
Service: Power tools should be serviced by qualified repair personnel using identical replacement parts to ensure safety.
Lubrication: The tool uses self-lubricating ball and roller bearings, so relubrication is not required. However, an annual cleaning, inspection, and lubrication of the gear case by a certified service center is recommended.
Cleaning: Air vents should be blown out with clean, dry air at least once a week. Non-metallic parts can be cleaned with a cloth dampened with water and mild soap. Chargers should be disconnected from the AC outlet before cleaning, and dirt/grease can be removed from the exterior with a cloth or soft non-metallic brush.
Battery Pack Storage: Best stored in a cool, dry place away from direct sunlight and excessive heat or cold. For long storage, a fully charged battery pack should be stored out of the charger.
Charger Maintenance: Do not operate chargers with damaged cords or plugs, or if they have received a sharp blow or damage. Do not disassemble chargers; take them to an authorized service center for repair. Disconnect from the outlet before cleaning.

Safety Guidelines (General):

DANGER: Indicates an imminently hazardous situation that will result in death or serious injury if not avoided.
WARNING: Indicates a potentially hazardous situation that could result in death or serious injury if not avoided.
CAUTION: Indicates a potentially hazardous situation that may result in minor or moderate injury if not avoided.
NOTICE: Indicates a practice not related to personal injury that may result in property damage if not avoided.

Battery Safety:

Never incinerate battery packs, as they can explode.
Avoid contact with battery liquid; if contact occurs, wash skin with soap and water, and flush eyes with clean water for 10 minutes, seeking medical attention if needed.
Do not store or carry battery packs with metal objects that could short the terminals.
Do not store or use battery packs in temperatures exceeding 105 °F (40 °C).
Do not force battery packs into non-compatible chargers.
Do not splash or immerse battery packs in water or other liquids.
Damaged battery packs should be returned to a service center for recycling.

Warranty Information:

Three Year Limited Warranty: Covers defects due to faulty materials or workmanship for three years from the date of purchase. Does not cover normal wear or tool abuse.
1 Year Free Service: DEWALT will maintain the tool and replace worn parts caused by normal use for free during the first year.
2 Years Free Service on DEWALT Battery Packs: Applies to specific battery models (DC9071, DC9091, DC9096, DC9182, DC9280, DC9360, DC9180, DCB120, DCB127, DCB201, DCB203, DCB207).
3 Years Free Service on DEWALT Battery Packs: Applies to specific battery models (DCB200, DCB204, DCB205).
90 Day Money Back Guarantee: Allows return for a full refund within 90 days of purchase with a receipt if not completely satisfied.
Online Registration: Recommended for warranty service, proof of ownership, and safety notifications.