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4-1/2" (115mm) model, D28110

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Why is my grinder spinning so slowly?

The power source/outlet that I am using works fine, but my tool is not spinning as fast as it should.

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CAUTION: The use of any other accessory not recommended for use with this tool could be hazardous.

WARNING: Blowing dust and grit out of motor and switch actuator using clean, dry compressed air is a necessary regular maintenance procedure. Dust and grit containing metal particles often accumulate on interior surfaces and could create an electrical shock or electrocu- tion if not frequently cleaned out. It is recommended that a ground fault circuit interrupter (GFCI) is utilized to further protect the user from electric shock resulting from the accumulation of conductive particles. If the tool is deactivated by the GFCI, unplug the tool and check and clean the tool before resetting the GFCI. ALWAYS WEAR SAFETY GLASSES when cleaning or using this tool.


WARNING: Do not use edge grinding/

CAUTION: Never use solvents or other harsh chemicals for cleaning the non-metallic parts of the tool. Use a clean, dry cloth only.

cutting wheels for surface grinding applica- tions because these wheels are not designed for side pressures encountered with surface grinding. Wheel breakage and injury may result.


1. Allow tool to reach full speed before touching tool to work surface.


2. Apply minimum pressure to work surface, allowing tool to operate at high speed. Cutting rate is greatest when the tool operates at high speed.

To assure product SAFETY and RELIABILITY, repairs, mainte- nance and adjustments should be performed by a DEWALT factory service center, a DEWALT authorized service center or other qualified service personnel. Always use identical replacement parts.

3. Once a cut is begun and a notch is established in the work- piece, do not change the angle of the cut. Changing the angle will cause the wheel to bend and may cause wheel breakage.


4. Remove the tool from work surface before turning tool off. Allow the tool to stop rotating before setting it down.

Recommended accessories for use with your tool are available at extra cost from your local dealer or authorized service center. If you need assistance in locating any accessory, please contact DEWALT Industrial Tool Co., 701 East Joppa Road, Baltimore, MD 21286, call 1-800-4-DEWALT (1-800-433-9258) or visit our website



CAUTION: The use of any other accessory not recommended for use with this tool could be hazardous.

Three Year Limited Warranty


DEWALT tools are properly lubricated at the factory and are ready for use.

DEWALT will repair, without charge, any defects due to faulty mate- rials or workmanship for three years from the date of purchase. This warranty does not cover part failure due to normal wear or tool abuse. For further detail of warranty coverage and warranty repair information, visit or call 1-800-4-DEWALT (1-800- 433-9258). This warranty does not apply to accessories or damage caused where repairs have been made or attempted by others. This warranty gives you specific legal rights and you may have other rights which vary in certain states or provinces.

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Usually, when the device does not spin at optimal speed, there could be debris and build-up inside the tool. Take apart the head for the grinder and clean out any necessary blockage. This will not only help the efficiency of the angle grinder, but also the life of your tool.

Also take a look here for troubleshooting the angle grinder.

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