DeWalt DC411-XE, Instruction Manual, Page: 16 / 24

14
Mounting and Using Depressed Center Grinding Wheels and
Sanding Flap Discs
MOUNTING AND REMOVING HUBBED WHEELS
WARNING: To reduce the risk of serious personal injury, turn tool off and
remove battery pack before making any adjustments or removing/installing
attachments or accessories.
Hubbed wheels install directly on the M14x2 threaded spindle.
1. Thread the wheel on the spindle by hand.
2. Depress the spindle lock button and use a wrench to tighten the hub of the wheel.
3. Reverse the above procedure to remove the wheel.
CAUTION: Failure to properly seat the wheel before turning the tool on may result in
damage to the tool or the wheel.
MOUNTING NON-HUBBED WHEELS
WARNING: To reduce the risk of serious personal injury, turn tool off and
remove battery pack before making any adjustments or removing/installing
attachments or accessories.
Depressed center Type 27 grinding wheels must be used
H
D
G
with included flanges. See pages 11 and 12 of this
manual for more information.
1. Install the unthreaded backing flange (G) on spindle
(D) with the raised section (pilot) against the wheel.
2. Place wheel against the backing flange, centering
the wheel on the raised section (pilot) of the backing
flange.
3. While depressing the spindle lock button, thread
the clamp nut (H) on spindle. If the wheel you are
installing is more than 3.17 mm (1/8") thick, place the
threaded clamp nut on the spindle so that the raised
section (pilot) fits into the center of the wheel. If the
wheel you are installing is 3.17 mm (1/8") thick or
less, place the threaded clamp nut on the spindle so
that the raised section (pilot) is not against the wheel.
3.17 mm (1/8")
WHEELS
backing flange
clamp nut
6.35 mm (1/4")
WHEELS
backing flange
clamp nut
4. While depressing the spindle lock button, tighten the clamp nut with a wrench.
5. To remove the wheel, depress the spindle lock button and loosen the threaded
clamp nut with a wrench.
NOTE: If the wheel spins after the clamp nut is tightened, check the orientation of the
threaded clamp nut. If a thin wheel is installed with the pilot on the clamp nut against
the wheel, it will spin because the height of the pilot prevents the clamp nut from
holding the wheel.
SURFACE GRINDING WITH GRINDING WHEELS
1. Allow the tool to reach full speed before touching the tool to the work surface.
2. Apply minimum pressure to the work surface, allowing the tool to operate at high
speed. Grinding rate is greatest when the tool operates at high speed.
3. Maintain a 20 ˚ to 30 ˚ angle between the tool and
20 ˚ -30 ˚
and work surface.
4. Continuously move the tool in a forward and back
motion to avoid creating gouges in the work surface.
5. Remove the tool from work surface before turning
tool off. Allow the tool to stop rotating before laying
it down.
EDGE GRINDING WITH GRINDING WHEELS
WARNING: Wheels used for cutting and edge grinding may break or kick back if
they bend or twist while the tool is being used to do cut-off work or deep grinding. To
reduce the risk of serious injury, limit the use of these wheels with a standard Type 27
guard to shallow cutting and notching [less than 13 mm (1/2") in depth]. The open