Bosch GCU18V-30N 18V Cordless Drywall Cut-Out Tool Instructions

Bosch GCU18V-30N 18V Cordless Drywall Cut-Out Tool

General Power Tool Safety Warnings

WarningsRead all safety warnings, instructions, illustrations and specifications provided with this power tool. Failure to follow all instructions listed below may result in electric shock, fire and/or serious injury.

SAVE ALL WARNINGS AND INSTRUCTIONS FOR FUTURE REFERENCE

The term “power tool” in the warnings refers to your mains-operated (corded) power tool or battery-operated (cordless) power tool.

1. Work area safety
   • Keep the work area clean and well-lit. Cluttered or dark areas invite accidents.
   • Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust. Power tools create sparks, which may ignite the dust or fumes.
   • Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.
2. Electrical safety
   • Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any adapter plugs with earthed (grounded) power tools. Unmodified plugs and matching outlets will reduce the risk of electric shock.
   • Avoid body contact with earthed or grounded surfaces, such as pipes, radiators, ranges, and refrigerators. There is an increased risk of electric shock if your body is earthed or grounded.
   • Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.
   • Do not abuse the cord. Never use the cord for carrying, pulling, or unplugging the power tool. Keep the cord away from heat, oil, sharp edges, or moving parts. Damaged or entangled cords increase the risk of electric shock.
   • When operating a power tool outdoors, use an extension cord suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of electric shock.
   • If operating a power tool in a damp location is unavoidable, use a Ground Fault Circuit Interrupter (GFCI) protected supply. Use of a GFCI reduces the risk of electric shock.
3. Personal safety
   • Stay alert, watch what you are doing, and use common sense when operating a power tool. Do not use a power tool while you are tired or under the influence of drugs, alcohol, or medication. A moment of inattention while operating power tools may result in serious personal injury.
   • Use personal protective equipment. Always wear eye protection. Protective equipment, such as a dust mask, non-skid safety shoes, a hard hat, or hearing protection, used for appropriate conditions, will reduce personal injuries.
   • Prevent unintentional starting. Ensure the switch is in the off-position before connecting to a power source and/or battery pack, picking 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.
   • Remove any adjusting key or wrench before turning the power tool on. A wrench or a key left attached to a rotating part of the power tool may result in personal injury.
   • Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations.
   • Dress properly. Do not wear loose clothing or jewelry. Keep your hair and clothing away from moving parts. Loose clothes, jewelry, or long hair can be caught in moving parts.
   • If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used. The use of dust collection can reduce dust-related hazards.
   • Do not let familiarity gained from frequent use of tools allow you to become complacent and ignore tool safety principles. A careless action can cause severe injury within a fraction of a second.

Getting to Know Your Product

WARNING: Separately disconnect the battery pack from the tool before making any assembly, adjustments, or changing accessories. Such preventive safety measures reduce the risk of starting the tool accidentally.

Bosch GCU18V-30 Cut Out Tool

1. Bit
2. Adjustable Depth Stop
3. Dust Hood
4. LED Worklight
5. On/Off Push Switch
6. Battery Pack*
7. Battery Pack Release Button*
8. Spindle Lock Button
9. Adjustable Depth Stop Knob
10. Handle (insulated gripping surface)
11. Collet
12. Collet Nut
13. Wrench (16 mm)
14. Output Shaft
15. Belt Clip
16. Vacuum Hose (see page 15)*
    * Sold Separately

Specifications

Battery Packs / Chargers: Please refer to the battery/charger list, included with your tool.
NOTE: For tool specifications, refer to the nameplate on your tool.

Intended Use

The power tool is intended for cutting plaster, plastic, drywall, and non-metallic light construction materials.

Assembly

WARNINGS

• Disconnect the battery pack from the tool before making any assembly, adjustments, or changing accessories. Such preventive safety measures reduce the risk of starting the tool accidentally. Make certain that the collet nut is securely tightened before turning the tool on.
• The rated speed of the accessory must be at least equal to the maximum speed marked on the power tool. Accessories running faster than their rated speed can break and fly apart.
• Wear protective gloves when installing and replacing bits. Bits intended for cutout tools have sharp surfaces.

Removing, Installing, and Adjusting the Adjustable Depth Stop and Dust Hood Assembly

In order to remove the adjustable depth stop (Figure 2, 2) and dust hood (3) assembly from the tool, turn the adjustable depth stop knob (9) counter-clockwise until you can remove it from the tool. The adjustable depth stop (2) and dust hood (3) assembly should then pull freely from the tool. Be careful not to lose the washer that is on the adjustable depth stop knob (9) screw. To reattach the adjustable depth stop (2) and dust hood (3) assembly, line up the slot in the adjustable depth stop (2) and dust hood (3) assembly with the threaded hole in the metal housing and reinstall the adjustable depth stop knob (9) by rotating it clockwise until tight. Be careful not to cross-thread the adjustable depth stop knob screw. The adjustable depth stop (2) allows you to control the depth of cut. Loosen the adjustable depth stop knob by turning it counter-clockwise until the depth stop can slide freely. For bits with a guide point, ensure the entire guide-point tip extends 1/8” (3.18 mm) beyond the material thickness (Fig. 2). For standard-point drywall bits, ensure the fluted end of the bit extends 1/8” (3.18 mm) beyond the material thickness.

Changing the Collet

The tool includes 1/8”, 5/32”, and 1/4” collets. The 1/8” collet is used with 1/8” diameter bits, the 5/32” collet is used with 5/32” diameter bits, and the 1/4” collet is used with 1/4” diameter bits.
To change collets, press and hold the spindle lock button (Figure 3, 8). If necessary, turn the motor spindle (with collet nut) manually until it is locked in place. Next, unscrew the collet nut (12) with the provided wrench (13) by turning it in the direction of rotation 1, and then release the spindle lock button. Place the desired collet in the output shaft (14). Each collet is double-ended, and either end is acceptable to use. Ensure that the collet (11) is fully inserted in the output shaft and has a small amount of play. The collet nut (12) must be easy to fit. If the collet nut or collet is damaged, replace it immediately. Next, hand-tighten the collet nut (12) by turning in the direction of rotation 2.

Installing BitsThe

CAUTION: The bit flutes are sharp and should be handled with caution. Contact with bit flutes could result in minor or moderate injury.

To prevent damage to the tool, never use the spindle lock as a braking device to stop the tool from rotating. Never tighten the collet with the collet nut if there is no bit installed. The collet may otherwise become damaged. The tool accepts spiral-type bits, standard multipurpose bits, and standard drywall bits. The bits are held by a collet system. Use either the 1/8”, 5/32”, or 1/4” collet, depending on the size of the bit shank. Press and hold the spindle lock button (Figure 4, 8). If necessary, turn the motor spindle (with collet nut) manually until it is locked in place. Next, unscrew the collet nut (12) with the provided wrench (13) by turning it in the direction of rotation 1, and then release the spindle lock button. Remove the old bit (if there is one) and insert the new bit (1). The bit shank must be inserted at least 3/4” (approximately 20mm) into the collet. Next, press and hold the spindle lock button (8) and securely tighten the collet nut (12) with the provided wrench (13) by turning it in the direction of rotation 2.

Belt Clip

WARNING: When the tool is attached to the belt, position yourself to avoid entanglement with surrounding objects.

Unexpected entanglement could cause the tool to fall, resulting in injury to the operator or bystanders. The belt clip (Figure 5, 15) will allow you to conveniently attach your tool to your belt. This feature will allow you to have both hands free when climbing a ladder or moving to another work area. Attach the belt clip (15) to the tool by securing it with the supplied mounting screw.

Inserting and Releasing Battery Pack

To insert the battery pack: Slide the charged battery pack (Figure 6, 6) into the housing until the battery pack locks into position (Figure 6, action 1). Your tool is equipped with a secondary locking latch to prevent the battery pack from completely falling out of the handle, should it become loose due to vibration. To remove the battery pack: Press the battery pack release button (7) and slide the battery pack forward (Figure 6, action 2).

Operation

WARNING: The rated speed of the accessory must be at least equal to the maximum speed marked on the power tool. Accessories running faster than their rated speed can break and fly apart.

On/Off Push Switch

Caution: Hold the tool with both hands while starting. Torque from the motor can cause the tool to twist.

To turn the tool “ON”, press and hold the on/off push switch (Figure 1, 5) until the LED work light (Figure 1, 4) comes on and the tool turns on.

NOTE: The on/off push switch has to be held down for a very brief period in order to turn the tool on. This is to help prevent accidental actuation of the tool. To turn the tool “OFF”, press the on/off push switch (5).

LED Work Light

Upon starting the tool, the LED work light (Figure 1, 4) switches on and illuminates the work area.

Make a Few Practice Cuts

WARNING: CutsDo not attempt to use this tool to make cutouts around any fixture or opening that has live electrical wires, or any wall that may have live electrical wiring behind it.

Shut off breakers or remove fuses to disconnect the circuit. Always hold the tool by its thermoplastic housing. The bit could conduct electrical current to the tool, creating an electrocution hazard for the operator.
After installing the bit into the tool and adjusting your depth stop, you should make a few practice cuts with the tool before attempting an actual job. A few exercises will give you the necessary practice to make clean, professional cuts.

• Step 1: Make certain that the collet nut (Figure 1, 12) is securely tightened before turning the tool on.
• Step 2: Hold the tool firmly and turn the tool “ON”.
• Step 3: While holding the tool firmly, insert the bit into the material at a 45° angle (Fig. 7).
• Step 4: Slowly bring it to a 90° angle to begin the cut (Fig. 8). The adjustable depth stop should be flush to the material surface. For all materials (EXCEPT cutting around outlet boxes in drywall), steer the tool in a clockwise direction with slow, steady pressure to cut.
• Step 5: After completing your cut, turn off the tool and carefully remove it from the material.

NOTE: Because of the rotating cutting action of the bit, there will be a slight pull when cutting. The slower you cut, the more control you have. Excessive pressure or fast cutting will cause excessive heat and may shorten the life of the bit.

NOTE: When cutting on a vertical surface, avoid ending your cut at the bottom of the hole. If possible, start and end your cut at the top so the scrap part will not drop onto the rotating bit. Turn the tool off and remove it from the material.

Operation

Instructions for creating cut-outs in drywall for outlets, can lights, windows, and doors

WARNING: Do not attempt to use this tool to make cutouts around any fixture or opening that has live electrical wires, or any wall that may have live electrical wiring behind it. Shut off breakers or remove fuses to disconnect the circuit. Always hold the tool by its thermoplastic housing.

The bit could conduct electrical current to the tool, creating an electrocution hazard for the operator. After assembling the bit into the tool as described earlier, it will be necessary to review the instructions provided below and make some practice cut-outs with this tool before attempting an actual job. The best method is to take some scrap pieces and nail or screw them in place over wall studs, which have an electrical box or other feature in place. A few such exercises will give you the necessary practice to make clean, professional cutouts around whatever is behind the drywall you are installing.

• Step 1: Be certain that the box or fixture is firmly mounted and all wires or other obstructions around the opening are pushed back out of the way. The bit uses the outer edge of the box or fixture as a guide, so it is important that there is nothing in the way that can prevent it from guiding completely around the opening. For the purposes of this instruction manual, the procedure discussed will be to make a cut-out around a standard 2 1/8” x 3 3/4” electrical box.
• Step 2: Turn the tool on. While holding the tool firmly with both hands, plunge the bit through the middle (Figure 10, cut 2). Then guide the bit to the right until you feel and hear the bit touch the inside edge of the box (Fig. 9).
• Step 3: Pull the bit out far enough to slip it over the edge of the box so it is now against the outside of the box (Figure 10, cut 3).
• Step 4: While keeping the bit in contact with the outside of the box, move the tool counterclockwise while applying light inward and upward pressure until you feel and hear it come to the corner. As you round the corner, apply light pressure left and downward (Figure 10, cut 4).
• Step 5: While moving slowly and continuously along the top contour, you will feel the bit come to the next corner. Round the corner and apply light downward and inward pressure until the bottom corner is reached (Figure 10, cut 5).
• Step 6: Move the bit right and upward, maintaining light continuous pressure toward the box (Figure 10, cut 6).
• Step 7: Round the right bottom corner and begin moving the bit upward while applying light pressure left toward the box until you meet the initial upward cut. Press the on/off button to turn the tool off (Figure 10, cut 7).

NOTE: These step-by-step instructions are generalized to acquaint you with the cut-out tool operation. After some practice, you may develop a technique with which you are more comfortable. However, you must always begin the cut somewhat centrally, and MOVE THE cut out tool ONLY COUNTER-CLOCKWISE to take advantage of the “hugging” action of the bit along the contours of the template. Remember to use a smooth, continuous motion. The exception to this rule applies to cutting window and door openings. Since you are tracing around the inside of the framing members, move the bit clockwise to take advantage of the bits “hugging” action.

Maintenance

WARNING: To avoid accidents, always disconnect the battery pack from the tool before servicing or cleaning.

Service

WARNING: NO USER SERVICEABLE PARTS INSIDE. Preventive maintenance performed by unauthorized personnel may result in the misplacement of internal wires and components, which could cause a serious hazard.

We recommend that all tool service be performed by a Bosch Factory Service Center or Authorized Bosch Service Station.

Batteries

Be alert for battery packs that are nearing their end of life. If you notice decreased tool performance or significantly shorter running time between charges, then it is time to replace the battery pack. Failure to do so can cause the tool to operate improperly or damage the charger.

Tool Lubrication

Your Bosch tool has been properly lubricated and is ready for use.

Motors

The motor in your tool has been engineered for many hours of dependable service. To maintain peak efficiency of the motor, we recommend it be examined every six months. Only a genuine Bosch replacement motor specially designed for your tool should be used.

Cleaning

CAUTION: Certain cleaning agents and solvents damage plastic parts.

Some of these are: gasoline, carbon tetrachloride, chlorinated cleaning solvents, ammonia, and household detergents that contain ammonia. Ventilation openings and switch levers must be kept clean and free of foreign matter. Do not attempt to clean by inserting pointed objects through the opening.

Accessory Storage & Maintenance

Store accessories in a cool, dry place and avoid freezing. Before use, check the accessory for cracks and fractures; do not use if damage is suspected.

Accessories

WARNING: Do not use attachments/accessories other than those specified by Bosch. Use of attachments/accessories not specified for use with the tool described in this manual may result in damage to tool, property damage, and or personal injury.

LIMITED WARRANTY OF BOSCH PORTABLE AND BENCHTOP POWER TOOLS

Robert Bosch Tool Corporation (“Seller”) warrants to the original purchaser only that all BOSCH portable and benchtop power tools will be free from defects in material or workmanship for a period of one year from date of purchase. Seller’s sole obligation and your exclusive remedy under this Limited Warranty and, to the extent permitted by law, any warranty or condition implied by law, shall be the repair or replacement of parts, without charge, which are defective in material or workmanship and which have not been misused, carelessly handled, or misrepaired by persons other than Seller or Authorized Service Station. To claim under this Limited Warranty, you must return the complete portable or benchtop power tool product, transportation prepaid, to any BOSCH Factory Service Center or Authorized Service Station. For Authorized BOSCH Power Tool Service Stations, please refer to your phone directory. This Limited Warranty does not apply to accessory ITEMS SUCH AS CIRCULAR SAW BLADES, DRILL BITS, ROUTER BITS, JIGSAW BLADES, SANDING BELTS, GRINDING WHEELS, AND OTHER RELATED ITEMS. ANY IMPLIED WARRANTIES SHALL BE LIMITED IN DURATION TO ONE YEAR FROM DATE OF PURCHASE. SOME STATES IN THE U.S., SOME CANADIAN PROVINCES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU. IN NO EVENT SHALL SELLER BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING BUT NOT LIMITED TO LIABILITY FOR LOSS OF PROFITS) ARISING FROM THE SALE OR USE OF THIS PRODUCT. SOME STATES IN THE U.S. AND SOME CANADIAN PROVINCES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO YOU. THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE IN THE U.S., PROVINCE TO PROVINCE IN CANADA, FROM COUNTRY TO COUNTRY. THIS LIMITED WARRANTY APPLIES ONLY TO PORTABLE AND BENCHTOP ELECTRIC TOOLS SOLD WITHIN THE UNITED STATES OF AMERICA, CANADA, AND THE COMMONWEALTH OF PUERTO RICO. FOR WARRANTY COVERAGE WITHIN OTHER COUNTRIES, CONTACT YOUR LOCAL BOSCH DEALER OR IMPORTER.

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Bosch GCU18V-30N 18V Cordless Drywall Cut-Out Tool-FAQs