Delta N081935, 18-900L Installing and Removing Drill Bits, Removing Chuck and Spindle Adapter

INSTALLING AND REMOVING DRILL BITS

NOTE: Use drill bits with a shank of 5/8" or less in diameter.

To reduce the risk of injury, turn unit off and disconnect it from power source before installing and removing accessories, before adjusting or when making repairs. An accidental start-up can cause injury.

1.Insert the smooth end of drill bit (L1) Fig. 46 in the chuck (S1) as far as it will go, and then back the bit out 1/16" (1.6 mm) (or up to the flutes for small bits).

	U1
S1
L1
T1	Fig. 46

2.Center the drill bit (L1) Fig. 46 in the chuck (S1) before tightening the chuck with the key (T1).

3.Turn the chuck key (T1) Fig. 46 clockwise to tighten and counter-clockwise to loosen the chuck jaws.

4.Tighten all three chuck jaws to secure the drill bit sufficiently to prevent slipping.

5.Remove the chuck key (T1) Fig. 46 from the chuck before starting the drill press. The chuck key is equipped with a self-ejecting pin (U1) which helps minimize the potential for the key to be left in the chuck.

REMOVING CHUCK AND SPINDLE ADAPTER

To reduce the risk of injury, turn unit off and disconnect it from power source before installing and removing accessories, before adjusting or when making repairs. An accidental start-up can cause injury.

The spindle adapter and chuck can be removed for the purpose of using shanks with a #2 morse taper.

1.Align the slot in the quill (V1) Fig. 47 with the slot in the spindle (W1).

2.Insert the drift key (X1) Fig. 48 through the slot in the quill and the slot in the spindle.

3.Tap the drift key (X1) Fig. 48 with a hammer until the the spindle adapter and chuck fall from the quill.

CORRECT DRILLING SPEEDS

Factors that determine the correct speed are 1) the workpiece, 2) the size of the hole, 3) the type of bit or other cutter, and 4) the quality of cut.

W1

V1

Fig. 47

X1

Fig. 48

Use the recommended speed for the the drill press bit and workpiece.

DRILLING WOOD

To reduce the risk of injury, tighten all lock handles before starting the machine. Loss of control of the workpiece can cause serious injury.

Twist drills, usually intended for metal drilling, can also be used for boring holes in wood. However, machine spur bits are generally preferred for working in wood. These bits cut a flat-bottom hole and are designed for removal of wood chips. Do not use hand bits (screw tip). At drill press speeds, they lift and rotate the workpiece.

For through boring, align the workpiece so that the bit will go through the center hole in the table. Scribe a vertical line on the front of the column and a matching mark on the table bracket and the drill press head, so that the table and drill press head can be clamped in the center position at any height.

Feed the drill bit slowly into the workpiece when the bit is close to cutting through the wood to prevent splintering the bottom face. Use a scrap piece of wood as a base block under the work to reduce splintering and protect the point of the bit.

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