Multiquip CDM1H HAND-HELD Core Drill PRE-SETUP, Before Starting, Drilling with a MQ Cobra Bit

CDM1H HAND-HELD CORE DRILL — PRE-SETUP

Before Starting:

CAUTION - Read Manual

Before attempting to operate this core drill, and to avoid serious injury to personnel, always read and understand operation manual. Failure to read and understand operation manual could result in serious harm or even death!

DANGER - Flammable/Combustible Materials

NEVER operate the core drill in or around flammable materials. The core drill emits sparks, if contact is made between the sparks and the flammable material,the posibility exists of fire or explosion causing damage to the equipment and severe bodily harm even death!

Drilling with a MQ Cobra™ Bit

The drilling of clean holes with Cobra™ core bits (1) requires an operating technique utilizing the center drill bit adapter (2). Center drill bit adapters are included with the core bit. As bits wear out, this adapter may be used with future core bits of similar depth and diameter.The adapter bit permits an anchoring point (3) so the bit can be accurately introduced into the surface (4). Once the hole is started, the center drill bit adapter (2) must be removed. See Figure 4.

Warning - Toxic Fumes

NEVER operate the core drill in a confined or enclosed area structure that does not provide ample free flow of air.

DrillingWith Standard DRY/WET Core Bits

With the proper adapter, 1" to 3" diameter dry/wet core bits can be used with the CDM1H when drilling vertical and horizontal holes. All hand-held core drills require practice and operator technique to ensure consistent clean drilled holes. When using wet core bits, water MUST be used to ensure proper cooling. “Bit chatter” around the hole can be eliminated by various techniques such as angle-entry procedures and fabricated guides. Angle-entry is one safe and simple way to start the bit onto the surface. Angle the bit (1) at 10°-15° above the surface and slowly introduce the bit until it is flush with the surface (2). See Figure 5.

Figure 5. Drilling with a Standard DRY/WET Core Bit

Figure 4. Drilling with a MQ Cobra™ Bit

CDM1H CORE DRILL — OPERATION AND PARTS MANUAL — REV. #6 (09/08/10) — PAGE 13