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    Boring and Drilling
    1. Home
    2. Bits, Blades and Cutters
    3. Boring and Drilling
    Item # AA604-400-TIM • Mfr # 604-400

    3/4" x 6" Spade Bit, 1/4" Straight Shank

    Description

    3/4 x 6 Spade Bit For General Wood Drilling

    3/4 x 6 spade bit describes a Timberline spade bit that drills a 3/4 inch hole and measures 6 inches long, so cabinetmakers and carpenters can handle typical clearance and pass-through holes in framing, casework, and shop jigs with one tool. The 1/4 inch straight shank matches common drill chucks, so this bit fits many handheld drills and drill presses without extra setup or special collets on the job. The bit is classified under spade bits in boring and drilling, so installers can expect a flat-paddle cutting profile that removes material quickly when working in wood. The 3/4 inch size pairs well with jobs such as running lines through panels or building jigs that need consistent, repeatable holes across multiple workpieces.

    Key Timberline Spade Bit Details For Daily Work

    • The bit is precision ground, so the cutting edges are formed accurately, helping it track straighter in wood and giving cleaner, more predictable hole sizing across repetitive drilling tasks.
    • The steel is hardened, so the working surfaces resist wear during drilling, which supports longer service life and more consistent cutting performance under regular shop or jobsite use.
    • The bit is designed for general purpose drilling of hard and soft woods, so a single pattern serves across typical cabinet stock, framing lumber, and shop fixtures, reducing bit changes between materials.
    • The design also covers drilling in wood byproducts, so it can handle materials like composites or similar manmade sheet goods, which helps maintain workflow when moving between solid wood and engineered panels.
    • The Timberline brand and 604-400 part number identify this exact spade bit, so buyers can match existing setups or re-order the same cutting performance across different projects.

    Spade Bit Size And Shank Setup For Installation

    This Timberline 3/4 inch x 6 inch spade bit uses a 1/4 inch straight shank, so it seats into standard drill chucks found on many corded and cordless drills without requiring specialized adapters. The 6 inch overall length gives extended reach compared with shorter patterns, which helps when drilling through thicker construction or stacked parts while still maintaining control. As a spade bit, it presents a flat cutting head with a central point, so users can position the tip accurately on layout marks before bringing the cutting edges into the material. This combination of shank size, length, and head style lets installers and shop workers set up drilling operations quickly while keeping holes consistent from piece to piece.

    Using This 3/4 Inch Bit In Woodworking And Drilling

    Where This Timberline Spade Bit Works Best

    This Timberline 3/4 inch x 6 inch spade bit is specified for general purpose drilling in hard and soft woods, so it suits work ranging from cabinet components to structural lumber that needs clean openings for routing lines or fasteners. Because the bit is also suited to wood byproducts, it can move from solid stock into manmade wood-based materials during a single project, allowing drill setups to stay in place while panels change. The 3/4 inch hole size fits applications where a moderately large opening is needed without overboring the material, such as clearance for certain lines, blocks, or hardware elements that pass through wood. The 6 inch length supports drilling through thicker assemblies or reaching into deeper cabinet or framing sections, while still giving the operator room to maneuver the drill body. With a hardened steel body and precision ground cutting edges, the bit is built for repeatable drilling where hole location and diameter must remain consistent over many repetitions in a production or installation setting.

    Why Precision Ground Hardened Steel Matters In Use

    The precision ground cutting profile on this spade bit defines the shape and sharpness of the edges, so each rotation shears wood fibers in a controlled pattern and supports straighter holes that align with layout marks. That accuracy is important when multiple parts must line up, because consistent hole geometry helps parts assemble without extra rework or enlarged openings. The hardened steel construction adds resistance to wear along the cutting edges, so the bit maintains its profile longer even when drilling both hard woods and denser wood byproducts. That durability supports a stable drilling feel over extended runs, which helps operators judge feed pressure and drilling speed more reliably. Combined with the 1/4 inch straight shank, which interfaces smoothly with common chucks, the hardened body provides a solid connection from drill to cutting head, so torque transfers efficiently and the bit stays steady while boring. Together, these characteristics support a workflow where each 3/4 inch hole is more predictable, contributing to cleaner assemblies and better alignment throughout woodworking and construction tasks.

    Common Questions About The 3/4 x 6 Spade Bit

    What materials is this Timberline spade bit designed to drill?

    This Timberline spade bit is designed for general purpose drilling of hard and soft woods and wood byproducts, so it covers typical solid stock and many manmade wood-based materials in shop and field work.

    What hole size and length does the 3/4 x 6 spade bit provide?

    The 3/4 x 6 spade bit drills a 3/4 inch diameter hole and has a 6 inch overall length, so it can create larger openings and reach through thicker sections in woodworking and construction assemblies.

    How does the 1/4 inch straight shank affect drill setup?

    The 1/4 inch straight shank matches many standard drill chucks, so this bit can be clamped quickly in common handheld drills or drill presses used in woodworking environments.

    Why are precision ground edges important on this spade bit?

    The precision ground edges shape the cutting profile accurately, so the bit tracks more consistently and produces more uniform 3/4 inch holes across repeated drilling operations.

    What does hardened steel construction provide for this bit?

    The hardened steel construction helps the cutting surfaces resist wear, so the bit can maintain its drilling performance over extended use in hard woods and wood byproducts.

    How is this 3/4 inch spade bit identified for reordering?

    This 3/4 inch spade bit is identified by the Timberline brand and manufacturer part number 604-400, so buyers can request the same bit when matching existing drilling setups.

    Selecting This Spade Bit For Wood Drilling Tasks

    The Timberline 3/4 inch x 6 inch spade bit with a 1/4 inch straight shank brings precision ground, hardened steel construction to general purpose drilling in hard and soft woods and wood byproducts, so it fits a wide range of cabinet, shop, and construction tasks. The defined 3/4 inch hole size and 6 inch length give predictable reach and clearance, which supports consistent layouts across multiple workpieces. When a project calls for reliable 3/4 inch openings in wood-based materials, this 604-400 spade bit offers a clearly defined option ready to match those drilling requirements.

    Catalog
    Y-37
    Diameter (in)
    3/4 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)
    3/4 in
    Overall Length (in)
    6 in
    Shank Diameter (in)
    1/4 in
    Product Type
    Spade Bit
    Supplier Pack Size
    10
    Sold In
    1
    Timberline
    Vernon Hills, IL
    Vernon Hills, IL
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