Global Machinery Company DP21 Installing and removing drill bits, Setting the drilling depth

Note. When the table is tilted the work piece should be clamped to the table.

Installing and removing drill bits

CAUTION. Always ensure that the drill press is switched off and the plug is removed from the power point before making any adjustments.

Using the chuck key loosen the chuck (11) so that the jaws are open wide enough to allow a bit to be inserted. The chuck is loosened by rotating the collar in an anti- clockwise direction.

Place the bit into the open chuck as far as it will go.

Tighten the chuck by rotating it with the use of the chuck key in a clockwise direction.

To remove the bit, loosen the chuck by rotating the collar in an anti-clockwise direction.

Setting the drilling depth

CAUTION. Always ensure that the drill press is switched off and the plug is removed from the power point before making any adjustments.

To change the maximum permitted depth of travel, first loosen the depth scale nut (20).

Rotate the feed wheel (4) to the desired depth on the depth scale (12).

Ensuring the drill bit is tight in the chuck use the feed wheel to lower the spindle until the drill bit just touches the work piece.

Changing the speed

CAUTION. Always ensure that the drill press is switched off and the plug is removed from the power point before making any adjustments.

The speed of the drill press is
determined by the size of the
pulley steps that the belt is	2500 RPM
attached to. Using a smaller
	1900 RPM
pulley step on the front pulley	1400 RPM
means a faster drill speed; using	890 RPM
	500 RPM
a larger pulley step on the front
pulley means a slower drill speed.
The table indicates the speed
of the drill in the various belt
positions.
Remove the plug from the mains socket.

Lift up the pulley cover (1). Loosen belt tension lock knob (2).

Move the belt to the correct pulley step for the desired speed.

Push motor backward until moderate belt tension is acquired. Tighten the belt tension lock knob.

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