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Drill Bit Speed - Hardwood and Softwood

Hardwood and softwood drill speed chart

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Recommended drill bit speed in hardwood and softwood are indicated below:

Diameter
(in)
Speed (rpm)
Softwood (Pine)Hardwood (Hard Marple)AcrylicBrassAluminumSteel
Twist drill bits
1/16 - 3/16 3000 3000 2500 3000 3000 3000
1/4 - 3/8 3000 1500 2000 1200 2500 1000
7/16 - 5/8 1500 750 1500 750 1500 600
1 1/16 - 1 750 500 - 400 1000 350
Brad-point bits
1/8 1800 1200 1500 - - -
1/4 1800 1000 1500 - - -
3/8 1800 750 1500 - - -
1/2 1800 750 1000 - - -
5/8 1800 500 750 - - -
3/4 1400 250 750 - - -
7/8 1200 250 500 - - -
1 1000 250 250 - - -
Forstner bits
1/4 - 3/8 2400 700 - - - -
1/2 - 5/8 2400 500 250 - - -
3/4 - 1 1500 500 250 - - -
1 1/8 - 1 1/4 1000 250 250 - - -
1 3/8 - 2 500 250 - - - -
Spade bits
1/4 - 1/2 2000 1500 - - - -
5/8 - 1 1750 1500 - - - -
1 1/8 - 1 1/2 1500 1000 - - - -
1 5/8 - 2 1200 700 - - - -
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Length

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km
in
ft
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naut miles


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Area

m2
km2
in2
ft2
miles2
acres


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Volume

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liters
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ft3
us gal


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Weight

kgf
N
lbf


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Velocity

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km/h
ft/min
ft/s
mph
knots


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Pressure

Pa (N/m2)
bar
mm H2O
kg/cm2
psi
inches H2O


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Flow

m3/s
m3/h
US gpm
cfm


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