user manual

Model G0756 (Mfg. Since 2/13)
-25-
Selecting Spindle
RPM
Use the proper spindle speed and feed rate to
reduce strain on all moving parts and decrease
risk of operator injury.
Prior to drilling, determine the RPM needed for
workpiece material then set the spindle speed to
the closest available RPM.
To determine the needed RPM:
1. Use the table in Figure 22 to determine the
speed required for your workpiece material.
Figure 22. Cutting speed table for HSS cutting tools.
Note:
For carbide cutting tools, double the cut-
ting speed. These values are a guideline only.
Refer to the MACHINERY'S HANDBOOK for
more detailed information.
Twist/Brad Point Drill Bits Soft Wood Hard Wood Plastic Brass Aluminum Mild Steel
1/16" – 3/16" 3000 2500 2500 2500 3000 2500
13/64" – 3/8" 2000 1500 2000 1250 2500 1250
25/64" – 5/8" 1500 750 1500 750 1500 600
11/16" – 1" 750 500 1000 400 1000 350
S
pade/Forstner Bits Soft Wood Hard Wood Plastic Brass Aluminum Mild Steel
1/4" – 1/2" 2000 1500
9/16" – 1" 1500 1250
1-1/8" – 1-7/8" 1000 750
2–3" 500 350
H
ole Saws Soft Wood Hard Wood Plastic Brass Aluminum Mild Steel
1/2" – 7/8" 500 500 600 600 600 500
1" – 1-7/8" 400 400 500 500 500 400
2" – 2-7/8" 300 300 400 400 400 300
3" – 3-7/8" 200 200 300 300 300 200
4" – 5" 100 100 200 200 200 100
R
osette Cutters Soft Wood Hard Wood Plastic Brass Aluminum Mild Steel
Carbide Insert Type 350 250
One-Piece Type 1800 500
T
enon/Plug Cutters Soft Wood Hard Wood Plastic Brass Aluminum Mild Steel
3/8" – 1/2" 1200 1000
5/8" – 1" 800 600
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.