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    Vernon Hills, IL
    Vernon Hills, IL
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    Boring and Drilling
    1. Home
    2. Bits, Blades and Cutters
    3. Boring and Drilling
    Item # AA604-250-TIM • Mfr # 604-250

    1/2" x 6" Spade Bit, 1/4" Straight Shank

    Description

    1/2 Inch x 6 Inch Spade Bit For Wood Drilling

    1/2 inch x 6 inch spade bit gives you a fixed 1/2 inch cutting width over a 6 inch length, so you can drill consistent through-holes or deep bores in woodworking setups that call for that size. The Timberline branding ties this bit to a dedicated line of boring and drilling tools, which helps standardize results across jobs. As a spade bit in the Bits, Blades and Cutters category, it is built specifically for fast hole making in wood-based materials instead of metal or masonry. The spade profile focuses all cutting at the flat blade, so the bit clears chips quickly during boring. In general purpose cabinet or shop work, this format supports repetitive drilling where a 1/2 inch diameter is specified on drawings.

    Key Spade Bit Details That Support Drilling

    • Precision ground construction means the bit geometry is machined to defined cutting edges, which helps the spade enter wood cleanly and track straighter during drilling.
    • Hardened steel body provides a tougher cutting edge, so the spade bit holds its shape longer when drilling repeated holes in hard or soft woods on the same job.
    • Design for general purpose drilling in hard and soft woods lets one bit handle typical cabinet stock and framing lumber, simplifying hole making across mixed wood species.
    • Suitability for wood byproducts covers materials like engineered panels, so the same spade bit can bore through sheet goods used in cabinet and casework projects.
    • 6 inch overall length gives reach for thicker assemblies, helping you drill through stacked components or deeper sections without changing setups.
    • 1/4 inch straight shank fits many common drill chucks, allowing the bit to be driven by a wide range of standard drilling tools on site or in the shop.

    Spade Bit Size And Shank Details For Fit-Up

    The 1/2 inch cutting diameter gives a predictable finished hole size for layouts calling for a half-inch bore, which helps align clearances for hardware or pass-throughs specified at that dimension. With a 6 inch length, the bit extends far enough to penetrate thicker wood or layered assemblies in a single pass, reducing repositioning. The 1/4 inch straight shank provides a uniform gripping surface for drills designed around that shank size, so the bit seats securely in compatible chucks. As a spade bit, the flat blade profile starts cutting as soon as it engages the surface, supporting quick drilling where high feed rates are acceptable.

    Using This Timberline Spade Bit In Wood Projects

    Where This 1/2 Inch Spade Bit Is Applied

    This Timberline spade bit is designated for general purpose drilling of hard woods, soft woods, and wood byproducts, so it covers typical shop materials like solid stock and engineered panels in one tool. The 1/2 inch diameter suits layouts that call for half-inch holes in cabinet components, jigs, or blocking where that dimension is specified. Its place in the Boring and Drilling group under Bits, Blades and Cutters ties it directly to operations where clean bores in wood are central to the workflow. The 6 inch length allows the bit to pass through thicker sections or multi-layer builds, supporting situations where you drill from one side and expect full penetration. Because the bit is precision ground and made from hardened steel, it is oriented toward repeated use on wood-based jobs where dimensional consistency across multiple holes matters.

    Why The Bit Design Supports Consistent Results

    The precision ground cutting profile helps the spade bit start accurately on layout marks, which supports straight hole paths when boring into both hard and soft woods. Hardened steel construction keeps the cutting edges more resistant to wear, so the bit's 1/2 inch diameter remains closer to nominal during repeated drilling in wood and wood byproducts. As a general purpose spade bit, the flat, wide blade quickly clears material from the hole, which helps maintain drilling speed and reduces the likelihood of the bit binding in typical shop stock. The 1/4 inch straight shank provides a consistent interface with drills that accept that shank size, supporting secure drive and smoother torque transfer during use. With a 6 inch overall length combined with the 1/2 inch cutting profile, the spade bit supports repeatable depth outcomes in deeper bores when setups are referenced from the same surface.

    Common Questions About The Timberline 604-250 Spade Bit

    What materials is this Timberline spade bit designed to drill?

    The spade bit is designed for general purpose drilling of hard woods, soft woods, and wood byproducts, so it works across typical solid stock and engineered wood panels in woodworking applications.

    What hole size does the 1/2 inch x 6 inch spade bit produce?

    The 1/2 inch x 6 inch spade bit produces a 1/2 inch diameter hole, which is useful wherever drawings or layouts specify a half-inch bore in wood-based materials.

    How long is the Timberline 604-250 spade bit and why does that matter?

    The spade bit is 6 inches long, providing reach to drill through thicker wood sections or multiple layers in a single pass during boring and drilling operations.

    What shank size does this Timberline 1/2 inch spade bit use?

    The spade bit uses a 1/4 inch straight shank, giving a standard cylindrical grip surface for many drills that accept a 1/4 inch shank in woodworking environments.

    Why does precision ground hardened steel matter on this spade bit?

    Precision ground hardened steel provides defined cutting edges and added wear resistance, so the bit can maintain straighter holes and more consistent sizing in wood over repeated drilling.

    What is the manufacturer part number for this Timberline spade bit?

    The manufacturer part number is 604-250, which identifies this specific Timberline 1/2 inch x 6 inch spade bit with a 1/4 inch straight shank.

    Selecting This Spade Bit For Wood Drilling Tasks

    This Timberline 1/2 inch x 6 inch spade bit pairs a fixed 1/2 inch cutting diameter with a 6 inch length and a 1/4 inch straight shank, so it aligns with wood drilling tasks that need that exact size and reach. Precision ground, hardened steel construction prepares the bit for repetitive boring in hard woods, soft woods, and wood byproducts where consistent hole sizing supports downstream assembly. For woodworking operations that rely on a dependable 1/2 inch bore in common wood materials, this spade bit matches those requirements.

    Catalog
    Y-37
    Diameter (in)
    1/2 in
    Overall Length (in)
    6 in
    Shank Diameter (in)
    1/4 in
    Product Type
    Spade Bit
    Supplier Pack Size
    10
    Sold In
    1
    Catalog
    Y-37
    Diameter (in)
    1/2 in
    Overall Length (in)
    6 in
    Shank Diameter (in)
    1/4 in
    Product Type
    Spade Bit
    Supplier Pack Size
    10
    Sold In
    1
    0Cart
    0Cart
    3/8 in1/2 in5/8 in3/4 in7/8 in1 in1-1/4 in1-1/2 in
    Spade BitN/A
    Timberline
    $2.88/Each
    1/2" x 6" Spade Bit, 1/4" Straight Shank
    Item# AA604-250-TIM / MFR Part # 604-250
    Each
    Each

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    Sold In: 1 Each

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