11Operation when using the dust cup (optionalaccessory) (Fig. 38)Operate the tool with the dust cup against the ceilingsurface.NOTE:• The dust cup (optional accessory) is intended only fordrilling in the ceramic workpiece such as concrete andmortar. Do not use the tool with the dust cup whendrilling in metal or similar. Using the dust cup for drillingin the metal may damage the dust cup due to the heatproduced by small metal dust or similar.• Empty the dust cup before removing a drill bit.• When using the dust cup, make sure that the dust capis mounted on it securely.MAINTENANCECAUTION:• Always be sure that the tool is switched off andunplugged before attempting to perform inspection ormaintenance.• Never use gasoline, benzine, thinner, alcohol or thelike. Discoloration, deformation or cracks may result.To maintain product SAFETY and RELIABILITY, repairs,carbon brush inspection and replacement, any othermaintenance or adjustment should be performed byMakita Authorized Service Centers, always using Makitareplacement parts.OPTIONAL ACCESSORIESCAUTION:• These accessories or attachments are recommendedfor use with your Makita tool specified in this manual.The use of any other accessories or attachments mightpresent a risk of injury to persons. Only use accessoryor attachment for its stated purpose.If you need any assistance for more details regardingthese accessories, ask your local Makita Service Center.• SDS-Plus Carbide-tipped bits• Core bit• Bull point• Diamond core bit• Cold chisel• Scaling chisel• Grooving chisel• Drill chuck assembly• Drill chuck S13• Chuck adapter• Chuck key S13• Bit grease• Side grip• Depth gauge• Blow-out bulb• Dust cup• Safety goggles• Plastic carrying case• Keyless drill chuckNOTE• Some items in the list may be included in the toolpackage as standard accessories. They may differ fromcountry to country.ENG905-1NoiseThe typical A-weighted noise level determined accordingto EN60745:Model HR2631F, HR2631FT, HR2641Sound pressure level (L pA): 90 dB (A)Sound power level (LWA): 101 dB (A)Uncertainty (K): 3 dB (A)Model HR2320T, HR2630, HR2630TSound pressure level (L pA): 91 dB (A)Sound power level (LWA): 102 dB (A)Uncertainty (K): 3 dB (A)Wear ear protectionENG900-1VibrationThe vibration total value (tri-axial vector sum) determinedaccording to EN60745:Model HR2631FWork mode: hammer drilling into concreteVibration emission (a h, HD ): 12.0 m/s 2Uncertainty (K): 1.5 m/s 2Work mode: chiselling function with side gripVibration emission (a h, Cheq): 9.0 m/s2Uncertainty (K): 1.5 m/s 2Work mode: drilling into metalVibration emission (a h, D ): 2.5 m/s2 or lessUncertainty (K): 1.5 m/s 2Model HR2631FTWork mode: hammer drilling into concreteVibration emission (a h, HD ): 11.5 m/s2Uncertainty (K): 1.5 m/s 2Work mode: chiselling function with side gripVibration emission (a h, Cheq): 8.5 m/s2Uncertainty (K): 1.5 m/s 2Work mode: drilling into metalVibration emission (a h, D ): 2.5 m/s2 or lessUncertainty (K): 1.5 m/s 2Model HR2641Work mode: hammer drilling into concreteVibration emission (a h, HD ): 11.5 m/s2Uncertainty (K): 1.5 m/s 2Work mode: chiselling function with side gripVibration emission (a h, Cheq): 9.0 m/s2Uncertainty (K): 1.5 m/s 2Work mode: drilling into metalVibration emission (a h, D ): 2.5 m/s2Uncertainty (K): 1.5 m/s 2Model HR2320TWork mode: hammer drilling into concreteVibration emission (a h, HD ): 15.5 m/s 2Uncertainty (K): 1.5 m/s 2Work mode: chiselling function with side gripVibration emission (a h, Cheq): 10.5 m/s2Uncertainty (K): 1.5 m/s 2Work mode: drilling into metalVibration emission (a h, D ): 2.5 m/s2 or lessUncertainty (K): 1.5 m/s 2