DCH 300 DCH 300–X Printed: 23.10.
Printed: 23.10.
1 Information about the documentation 1.1 • • • About this documentation Read this documentation before initial operation or use. This is a prerequisite for safe, trouble-free handling and use of the product. Observe the safety instructions and warnings in this documentation and on the product. Always keep the operating instructions with the product and make sure that the operating instructions are with the product when it is given to other persons. 1.2 Explanation of symbols used 1.2.
1.3 Product-dependent symbols 1.3.1 Symbols on the product The following symbols are used on the product: Protection class II (double-insulated) Diameter Rated speed Revolutions per minute Alternating current Wireless communication Wear eye protection 1.4 Product information Hilti products are designed for professional use and may be operated, serviced and maintained only by trained, authorized personnel. This personnel must be informed of any particular hazards that may be encountered.
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 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.
▶ ▶ ▶ ▶ ▶ ▶ ▶ ▶ ▶ ▶ ▶ ▶ ▶ ▶ ▶ ▶ ▶ and bystanders away from the plane of the rotating wheel. The guard helps to protect operator from broken wheel fragments and accidental contact with wheel. Use only bonded reinforced or diamond cut-off wheels for your power tool. Just because an accessory can be attached to your power tool, it does not assure safe operation. The rated speed of the accessory must be at least equal to the maximum speed marked on the power tool.
▶ ▶ ▶ ▶ ▶ ▶ ▶ ▶ ▶ 2.3 torque reaction during start-up. The operator can control torque reactions or kickback forces, if proper precautions are taken. Never place your hand near the rotating accessory. Accessory may kickback over your hand. Do not position your body in line with the rotating wheel. Kickback will propel the tool in direction opposite to the wheel’s movement at the point of snagging. Use special care when working corners, sharp edges etc. Avoid bouncing and snagging the accessory.
Do not touch the supply cord or extension cord if it is damaged while working. Unplug the supply cord from the power outlet. Check the power tool’s supply cord at regular intervals and have it replaced by a qualified specialist if found to be damaged. Check extension cords at regular intervals and replace them if found to be damaged. ▶ ▶ ▶ Using and handling the power tool ▶ Make sure that sparks created during use do not present a hazard. Adjust the guard to the appropriate position.
@ ; = % Cut indicator Dust removal connector cap Guard Rear grip & ( ) + Switch-on interlock release button On/off switch Service indicator Diamond cutting disc English Printed: 23.10.
§ / : 3.2 Front grip Guide roller Arbor lockbutton Product overview DCH 300–X 8 English Printed: 23.10.
@ ; = % Cut indicator Dust removal connector cap Guard Water regulating valve & ( ) + Water connection Rear grip Switch-on interlock release button On/off switch English Printed: 23.10.
§ / : ∙ $ £ Service indicator Portable residual current device (PRCD) Diamond cutting disc Front grip Guide roller Arbor lockbutton 3.3 | ¡ Q W E Hood clamping screw Depth gauge Cutting depth indicator slider Clamping nut wrench, 24 / 10 mm AF Hex key, 6 mm AF Intended use DCH 300 The product described is an electric cutter designed to be used with diamond cutting discs for drycutting mineral materials.product.
Status The service indicator lights red. Meaning • • The service indicator blinks red. 3.9 • End of service interval – servicing is due. After the LED lights for the first time, the diamond cutter can continue to be used for several hours (running time) before the automatic cut-out is activated. Return the product to Hilti Service for servicing in good time in order to ensure that it is always ready for use. The product is defective. Have the product repaired by Hilti Service.
4.2 Selecting suitable cutting discs Use only cutting discs with a specification suitable for the intended application. Cutting disc specifications ▶ Area of application Cutting disc specifications Cutting metal Synthetic resin-bonded, fiber-reinforced cutting discs in accordance with EN 12413 (flat, type 41) 1) Cutting mineral materials 1) Diamond cutting discs as per EN 13226 To allow the disc to be fitted to the tool, the special DCH 300 ABR mounting flange (accessory) must be used.
Recommended minimum conductor cross-sections and maximum power cord lengths for 120V supply voltage Power cord AWG 16 AWG 14 AWG 12 Conductor cross-section 2,58 kcmil 4,11 kcmil 6,53 kcmil Conductor cross-section Power cord length Power cord length 5.1.3 1,31 mm² 25 m 75 ft 2,08 mm² 30 m 100 ft 3,31 mm² 50 m 150 ft AWG 10 5,26 mm² 10,4 kcmil 100 m 250 ft Checking the portable residual current device (PRCD) DCH 300–X 1. Plug the power tool’s supply cord into a grounded power outlet. 2.
2. Disconnect the mains plug from the power outlet. 3. Clean the clamping flange and the clamping nut. 4. Fit the 60 mm diameter reversible flange onto the arbor the right way round, so that it is no longer free to rotate. The 60 mm diameter reversible flange is used for mounting cutting discs with an arbor hole size of 22.2 mm or 25.4 mm. Check which side of the reversible flange fits the arbor hole in the cutting disc. The reversible flange must center the cutting disc. 5. 6. 7. 8. 9. 5.3 @ ; = 1. 2. 3.
5. 6. 7. 8. 9. Place the diamond cutting disc on the reversible flange. Fit the 80 mm diameter clamping flange and the clamping nut. Press the arbor lockbutton and hold it in this position. Use the wrench to tighten the clamping nut securely and then release the arbor lockbutton. Check to ensure that the arbor lockbutton has disengaged and that the arbor is again free to rotate. 5.4 Removing the cutting disc 1. Check that the supply cord has been unplugged from the power outlet. 2.
ATTENTION Risk of damage. The depth gauge (accessory) will be damaged by flying sparks. ▶ Do not fit the depth gauge when you wish to use the power tool for working on metal. 1. Disconnect the supply cord plug from the power outlet. 2. Place the hook over the guide wheel axle. 3. Pivot the hood extension into the hood until the catch is heard to engage. 5.6 Removing the depth gauge 1. Disconnect the mains plug from the power outlet. 2. Press the catch and pivot the hood extension away from the hood. 5.
5.10 Adjusting the water flow rate DCH 300–X ▶ Turn the water regulator valve until the desired water flow rate is set. 5.11 Disconnecting the water supply DCH 300–X 1. Shut off the water supply to the cutter. 2. Disengage the coupling (proprietary system) of the hose providing the water supply to the cutter. 5.12 Switching on the cutter 1. 2. 3. 4. Plug the supply cord into the power outlet. DCH 300X: Press the ON button on the PRCD.
5.14 Switching the cutter off Release the on/off switch. ◁ The motor is switched off, the cutting disc slows and stops. ◁ The switch-on safety lock is re-activated. ▶ 6 Care and maintenance WARNING Danger of electric shock! Carrying out care and maintenance while the supply cord is connected to the power outlet presents a risk of serious injuries including burns. ▶ Always unplug the supply cord before carrying out all care and maintenance tasks.
Trouble or fault The power tool doesn’t start or switches itself off. Possible cause Interruption in the electric supply. Action to be taken ▶ The portable residual current device (PRCD) has tripped because of water ingress into the power tool. ▶ The supply cord or plug is defective. ▶ The on / off switch is defective. ▶ The power tool has been overloaded (overload protection activated / application limits exceeded). ▶ The overheating protection system is active.
20 English Printed: 23.10.
Printed: 23.10.
Printed: 23.10.
Printed: 23.10.
Hilti = registered trademark of Hilti Corp., Schaan Printed: 23.10.
