Calculating Spindle Speed For Drilling - Grizzly G0808 Owner's Manual

Calculating Spindle Speed for Drilling

Using the Drilling Speed Chart
The chart shown in Figure 50 is intended as
a guide only. Always follow the manufacturer's
speed recommendations if provided with your drill
bits, cutters, or hole saws. Exceeding the recom-
mended speeds may be dangerous to the opera-
tor or cause damage to the tooling.
The speeds shown here are intended to get you
started. The optimum speed will always depend
on various factors, including tool diameter, drilling
pressure, material hardness, material quality, and
desired finish.
Often, when drilling materials other than wood,
some type of lubrication is necessary.
-34-
Lubrication Suggestions
Wood ...........................................................None
Plastics ............................................Soapy Water
Brass ...............................Water-Based Lubricant
Aluminum ..................... Paraffin-Based Lubricant
Mild Steel ............................. Oil-Based Lubricant
Larger bits turning at slower speeds tend
to grab the workpiece aggressively. This
can result in the operator's hand being
pulled into the bit or the workpiece being
thrown with great force. Always clamp the
workpiece to the table to prevent injuries.
Figure 50. Drilling speed chart.
Model G0808 (Mfd. Since 11/15)