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Attaching the Cobra™ Core Bit to the Core Drill
1. Place the core bit and core drill on a suitable workbench or
area that is free of clutter dirt and debris.
2. Before installing the core bit make sure that thepower cord
of the core drill is unplugged from the AC wall receptacle.
NEVER install the core bit on core drill that has power applied
to it.
3. Screw the core bit onto the main shaft of the core drill by
turning it clockwise by hand until tight (Figure 4).
4. Using the supplied wrenches ( 27 mm and adjustable)
continue to tighten the core bit. When using the wrenches,
apply pressure in the opposite direction to fully tighten.
5. Insert the detachable handle into the desired handle port.
Figure 6. Attaching the Cobra™ Core Bit to the Core Drill
With the proper adapter, 1" to 3" diameter dry/
wet core bits can be used with the CDM1H when
drilling vertical and horizontal holes. See
General Information section. Different size
wrenches may be required depending on the
type of the core bit lug.
PAGE 14 —CDM1H CORE DRILL — OPERATION AND PARTS MANUAL — REV. #4 (12/18/07)
CDM1H HAND-HELD CORE DRILL — PRE-SETUP
Connecting Water to the Core Drill
1. Attach the supplied water hose and garden hose fitting to the
Adjusting the Stock (Shoulder Rest)
1. The CDM1H is supplied with an adjustable stock. This stock
2. If more spring tension is required (trigger lever), simply adjust
core drill as shown in Figure 5. Be sure to place worm-clamps
on each end of the hose to prevent leaking.
Figure 7. Connecting the Water
can be adjusted by simply squeezing the trigger and sliding
the stock back and forth to the desired position Figure 6).
the spring tension bolt until the desired spring tension is
obtained.
Figure 8. Adjusting the Stock
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