4214 WENPRODUCTS.COM
Operation
(continued)
Mechanical variable speed (Fig. 28)
This is a mechanical variable speed drill press. To increase or
decrease the speed when operating, raise or lower the speed
handle (1).
Use the following table to determine the recommended
speed for the drill size you are using
and the type of material you are to drill. While drilling,
check the speed on the digital speed readout (2) located at
the front of the drill press.
Fig. 28
2
1
Warning: Do not change speed without turn on the machine.
Recommended speed for drill bit size and materials
SPEED WOOD ALUMINUM / ZINC / BRASS IRON / STEEL
RANGE Drill bit size Drill bit size Drill bit size
(RPM) inches mm inches mm inches mm
2000–3100 3/8 9.5 7/32 5.6 3/32 2.4
1400–2000 5/8 16.0 11/32 8.75 5/32 4.0
1000–1400 7/8 22.0 15/32 12.0 1/4 6.4
800–1000 1 1/4 31.75 11/16 17.5 3/8 9.5
530–800 1 5/8 41.4 3/4 19.0 5/8 16.0
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