WEN 4208 8 inch 5 Speed Drill Press - Manual (Page 17)

17
OPERATION (CONTINUED)
Drilling to a specific depth (Fig. 17)
1. Mark the desired depth of the hole on the side of the
workpiece (1).
2. With the switch off, bring the drill bit (2) down until the
tip is even with the mark.
3. Hold the feed handle at this position.
4. Lock the depth scale lock knob. The chuck and the drill
bit will now be stopped at the distance selected on the
depth scale.
General Drilling Guidelines
WARNING: To avoid injury, make sure the chuck key is removed from the chuck before
starting any drilling operation.
Drilling speeds
Important factors when determining the best drilling speed:

Type of material

Size of the hole to be drilled

Type of drill bit or cutter

Desired quality of the cut
Remember, smaller drill bits require greater speed than large drill bits. Softer materials require greater
speed than harder materials.
Drilling metal

Use metal-piercing twist drill bits.

It is always necessary to lubricate the tip of the drill with oil to prevent overheating the drill bit.

All metal workpieces should be clamped down securely. Any tilting, twisting, or shifting causes a
rough drill hole, and increases the potential of drill bit breakage.

Never hold a metal workpiece with your bare hands. The cutting edge of the drill bit may seize the
workpiece and throw it, causing serious injury. The drill bit will break if the metal piece suddenly hits
the column.

If the metal is flat, clamp a piece of wood under it to prevent turning. If it cannot be laid flat on the
table, then it should be blocked and clamped.