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    Trim Bits
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    Item # BL85671M • Mfr # 85671M

    Bosch straight router bit 1-1/8 in plunge/trim

    Description

    Bosch Straight Router Bit For Plunge And Trim

    Bosch straight router bit with carbide tipped cutting edges is built for lettering, plunge cutting, grooving, and pattern or templet cutting from above and below the workpiece, so one tool can handle common routing tasks across a project. The router bit is classified as a plunge/trim 1-1/8 inch straight bit, which defines its use for straight plunges or trimming cuts where a consistent 1-1/8 inch cutting diameter is required. Being part of the router bits product class keeps it aligned with typical router collet and base setups used in woodworking shops. The straight bit design focuses the cut along clean straight paths, which suits grooves, inlays, and guided template work. Top bearing mounted construction supports pattern work from one face of the stock, while the ability to cut from above and below broadens how jigs and templates are arranged during production.

    Key Bosch Trim Router Bit Work Advantages

    • The carbide tipped design provides hard cutting edges that maintain geometry during lettering, grooving, and trim passes, supporting repeatable profiles over multiple parts before sharpening is required.
    • The two flutes create a balanced cutting action as the bit rotates, which helps the router track more smoothly along guides or templates during pattern and templet cutting operations on consistent stock.
    • The 1-1/8 inch diameter defines the cutting width for grooves and trimming passes, so layouts and jigs can be sized confidently around that specific straight cut dimension in production workflows.
    • The plunge/trim straight configuration allows the bit to start cuts by plunging into the workpiece or by trimming along an edge, which helps one setup handle different routing stages without frequent bit changes.
    • Use on lettering applications means the bit forms straight-walled letter strokes, which matters when routing signs or identification panels where clean character edges are required.

    Installation And Cutting Setup Details

    This Bosch router bit functions as a plunge/trim 1-1/8 inch straight cutter, so the bit is selected when a straight-walled groove or trim at that diameter is needed in the routing setup. As a straight bit within the router bits class, it works in router bases designed to accept compatible bits, keeping it in line with typical woodworking routers used in shops and onsite work. The top bearing mounted design supports guided passes along a template or pattern, so once the bearing references the guide, the cutting edges follow the profile without re-marking the work surface. Because it is suitable for cutting from above and below the workpiece, jigs can be arranged on either face to support the workflow of lettering, grooving, or pattern routing.

    Using This Plunge/Trim Bit In Real Work

    Where This Bosch Trim Router Bit Fits Best

    This Bosch router bit is identified as a plunge/trim 1-1/8 inch straight bit, so it is best applied in tasks where a straight-walled cut of that diameter is needed for trimming or plunging into material. In lettering applications, the straight profile and controlled diameter combine to route letter shapes with consistent stroke width, which matters when sign layouts rely on uniform character proportions across multiple boards. When grooving, the 1-1/8 inch diameter establishes the finished groove width in a single pass, so panels, edges, or inlay channels can be dimensioned accurately to accept matching components. The top bearing mounted construction means the bit follows a pattern edge, allowing work on both above and below sides of the workpiece depending on how the template is fixed, which supports flexible shop and site setups. Because the bit is part of the router bits category within trim bits, it fits routing roles where trimming along patterns and creating clean straight cuts are routine.

    Why These Straight Bit Details Support Accuracy

    The carbide tipped cutting edges on this Bosch straight router bit resist wear during lettering, plunge cutting, grooving, and pattern work, which helps maintain consistent cut size and surface finish as parts are repeated. Two flutes distribute the cutting load as the bit rotates, supporting a smoother feed feel that helps the router follow patterns or straightedges with less tendency to wander during passes. The defined 1-1/8 inch diameter gives a fixed reference for planners building jigs and templates, so they can size openings or offsets around that measurement and expect the routed track to align with design intent. Top bearing mounted construction allows the cutting edges to track precisely along patterns during templet cutting, which is important when producing matching parts from above or below the workpiece face. Because the bit is specified for use from both sides of the workpiece, it supports routing strategies where the best face can remain down or up while still using the same pattern location, which streamlines repeat work.

    Common Bosch Straight Router Bit Questions

    What cutting tasks is this Bosch straight router bit designed for?

    This Bosch router bit is designed for lettering, plunge cutting, grooving, and pattern or templet cutting from above and below the workpiece, so it suits a range of straight routing tasks.

    How does the carbide tipped design help during routing?

    The Bosch carbide tipped straight bit uses hard cutting edges that hold their shape while lettering, grooving, and trimming, which supports consistent cut size and surface quality over repeated use.

    Why does the two flute configuration matter in use?

    The two flutes on this router bit share the cutting load as it rotates, helping the bit track smoothly during pattern or templet cutting and supporting cleaner edges in straight grooves.

    What does the 1-1/8 inch straight diameter provide?

    The 1-1/8 inch straight diameter defines the width of plunge and trim cuts, so groove layouts and template offsets can be planned around a known cutting size.

    How does the top bearing mounted design affect pattern routing?

    The top bearing on this Bosch trim router bit rides against a template, guiding the carbide tipped edges to follow the pattern profile for repeatable lettering and shape cutting.

    What does Bosch part number 85671M indicate for this bit?

    Bosch part number 85671M identifies this specific plunge/trim 1-1/8 inch straight router bit, helping match replacements or add identical bits to a routing setup.

    Select This Bit For Straight Plunge And Trim Work

    The Bosch straight router bit with carbide tipped, two flute construction and a 1-1/8 inch diameter is set up for lettering, plunge cutting, grooving, and pattern or templet cutting from above and below the workpiece. That combination lets one bit cover common straight routing tasks in trim and template work, while the top bearing mounted design supports guided passes along patterns. For projects where a defined 1-1/8 inch straight cut is part of the workflow, this Bosch plunge/trim bit aligns clearly with that requirement and keeps routing steps focused on a known cutting profile.

    Diameter (in)
    1-1/8 in
    Shank Diameter (in)
    1/2 in
    Product Type
    Edgeforming Router Bits
    Number of Flutes
    2
    Overall Length (in)
    3-1/2 in
    Minimum Cutting Height
    1-1/2 in
    Supplier Pack Size
    1
    Sold In
    1
    Diameter (in)
    1-1/8 in
    Shank Diameter (in)
    1/2 in
    Product Type
    Edgeforming Router Bits
    Number of Flutes
    2
    Overall Length (in)
    3-1/2 in
    Minimum Cutting Height
    1-1/2 in
    Supplier Pack Size
    1
    Sold In
    1
    N/A1/4 in3/8 in1/2 in5/8 in3/4 in7/8 in1 in1-1/8 in1-1/4 in1-5/16 in1-1/2 in
    N/A1/4 in1/2 in
    Trim BitEdgeforming Router BitsSlotting Cutter
    N/A1234
    N/A1/4 in1/2 in
    N/A1-1/2 in1-15/16 in2 in2-1/8 in2-1/4 in2-3/8 in2-7/16 in2-1/2 in2-5/8 in2-7/8 in3-1/2 in4-1/4 in4-7/16 in4-1/2 in
    N/A3/8 in1/2 in5/8 in
    N/A15 Degree22.5 Degree45 Degree10 Degree22 Degree
    N/A3/8 in1/2 in5/8 in3/4 in15/16 in1 in1-1/2 in2 in
    Bosch
    $79.89/Each
    Bosch straight router bit 1-1/8 in plunge/trim
    Item# BL85671M / MFR Part # 85671M
    Each
    Each

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