Wood Drilling
WOOD DRILLING
158
Bit Style
Size Range
Typical Trades
Application Benefits
Fast, clean holes with reduced “break out" for
through-hole drilling or countersinking.
1/4"
to 1-1/2" diameter
4-3/4"
to 16" lengths
Spade Bit
Carpentry, Electrical,
Plumbing
Self-feeding tip pulls bit into the work for repetitive cutting of
fast clean holes with a clean exit hole. Single-spur cutting edge
scribes the circumference of the hole for a smoother finish.
1/4"
to 1-1/2" diameter
7-1/2"
length
Solid Center Auger Bit
Carpentry, Electrical,
Plumbing
Hollow center provides better chip removal for deeper holes
in utility poles and logs.
3/8"
to 2" diameter
7-1/2"
to 29" lengths
Hollow Center Auger Bit
Public Utilities,
Electrical, Plumbing,
Carpentry, Log Homes
Wire hole near the end of the bit enables user to pull
wire back through the hole after drilling.
1/4"
to 3/4" diameter
12"
to 30" lengths
Installer Bit
Telecommunications,
Cable/Internet,
Security Systems
Replaceable self-feeding tip pulls bit into the wood.
Best for cutting larger holes with clean edges.
1"
to 4-5/8" diameter
Self-Feed Bit
Plumbing, Electrical,
General Contracting
Precise cutting of smooth, flat-bottomed (blind) holes with
clean, sharp edges.
1/4"
to 2-1/8" diameter
Forstner Bit
Fine Woodworking,
Cabinet Making
Precise cutting of smooth through-holes with clean, sharp
edges and reduced “break out."
1/8"
to 1/2" diameter
Brad Point Bit
Woodworking,
Cabinet Making
Tri-Flute Bit
7/16"
to 1-1/2" diameter
Carpentry, Electrical,
Plumbing
Fast, clean holes with reduced “break out" when through-hole
drilling. Full-screw tip requires less effort.
Perfect for variable-size countersink holes.
1/8"
to 1/2" diameter
Countersink Bit
Woodworking,
Cabinet Making
Perfect for cutting dowels or plug holes.
1/8"
to 1/2" diameter
Plug Cutters
Woodworking,
Cabinet Making
A Century of Quality and Innovation
In 1885, the IRWIN
®
Auger Bit Company was formed. Over 125 years later, IRWIN is still the leading manufacturer of wood drilling bits and accessories.
No matter what wood drilling project you face, IRWIN Tools makes a drill bit that performs the job better. Our mark of quality is stamped right on the
shank of our full range of bits. Whether the job requires quick, clean holes or precise finish work, IRWIN has a bit for every application and every need.
The all new IRWIN
®
WeldTec™ pole auger is made stronger and lasts longer than any pole auger in the market. It features a welded high speed steel
cutting edge that is sharper and larger than standard carbon steel pole augers, providing increased durability and faster drilling in dense, treated, or
creosote-soaked wood. With a feed screw that is 50% larger* and a 10% faster pitch*, it's designed specifically for drilling deep holes in dense wood.
The flutes are about two times wider* for maximum chip removal – even in the deepest holes. Only IRWIN offers the superior performance and added
durability of WeldTec.
Use the chart below to determine which bit is best for the job at hand.
*
vs. standard pole augers
Lock-n-Load
®
system for quick release and fast bit changes.
1/4"
available in
2", 6"
and 12" length
3/8"
available in
2", 5-1/2"
and 12" length
7/16"
available in 5-1/2",
12"
and 18" length
Quick-Change
Extensions
Woodworking,
Cabinet Making