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Parts & Service: 020 8988 7400 / E-mail: Parts@clarkeinternational.com or Service@clarkeinternational.com
AUXILIARY HANDLE AND DEPTH STOP
The depth stop is fitted within the
auxiliary handle and can only be
used if this handle is installed.
1. Slide the handle assembly over
the chuck and onto the body of
the drill.
2. Rotate the handle to the desired
position and secure in position by
twisting clockwise.
3. Insert the depth stop rod through
the holder in the handle assembly.
• To set the depth stop, slide the rod in and out to the required position
and lock in place by turning the thumbscrew clockwise.
GENERAL DRILLING TECHNIQUE
• After drilling material to the full depth, maintain chuck rotation to
ease drill withdrawal.
• Always drill directly in line with the bit. Do not use sideways
movement as this may damage the drill or cause the bit to break.
• If the drill is not cutting the metal then sharpen the drill bits, ensuring
the various cutting angles are correct.
• Always use sharp, good quality drill bits. The performance of your drill
is dependant on the quality of the bits used.
• Reduce the pressure on the drill bit when it is about to break through.
This will prevent the drill from jamming.
• If drilling a large hole, first drill a pilot hole using a smaller drill bit.
• Always apply pressure to your drill bit in a straight line and, where
possible, at right angles to the workpiece.
• When drilling holes or driving screws into walls, floors etc., always
make sure that there are no live electrical wires in the path of the bit.
• When drilling in metal, the materials being drilled can become hot.
To reduce overheating use a suitable cooling lubricant. No cooling
lubricant is necessary when drilling cast iron or brass as they should
be drilled dry.
• When drilling metal, the harder the metal the slower the drill speed.
Similarly, the bigger the drill bit the slower the speed.
• Always start drilling at a slow speed to prevent the drill from slipping
out of the pop mark or indent, gradually increasing speed until the
CHD850 Hammer Drill rev 4.fm Page 10 Monday, February 9, 2015 10:47 AM
