Product Description
CMT 812.611.11 Straight Bit Long Series by CMT is a 7/16 in. diameter, long-series router bit engineered for deep straight cuts, precise dadoes, and accurate groove routing in solid hardwood, plywood, MDF, and a wide range of wood composites. With a 1/2 in. shank and an extended total length of 3 1/4 in., this two-flute carbide-tipped bit is purpose-built for use with the Leigh dovetail jig, delivering clean, splinter-free edges on finished workpieces. Whether you are routing on a handheld router, a router table, or a CNC routing machine, this long-series straight bit provides the reach and stability needed for demanding woodworking and joinery applications.
Key Features
- Long-Series Design (3 1/4 in. total length): the extended body gives you access to deeper cuts and greater reach than standard-length straight bits, making it ideal for through-cuts in thicker stock and deep dado work.
- 7/16 in. Cutting Diameter with 1 1/4 in. Cutting Height: sized specifically for Leigh jig compatibility, this combination of diameter and cutting height produces consistent, repeatable grooves and slots in joinery applications.
- HW (Hard Metal / Tungsten Carbide) Blade Material: carbide-tipped construction maintains a sharp cutting edge far longer than high-speed steel, reducing the frequency of resharpening and downtime during production runs.
- 2-Flute Right-Hand Rotation: dual cutting edges deliver smooth, balanced chip evacuation and a clean finished edge on each pass, minimizing tearout on hardwood and laminate surfaces.
- 1/2 in. Shank: the full 1/2 in. shank provides a secure, low-vibration grip in the router collet, contributing to straighter cuts and a finer surface finish compared to smaller shank diameters.
- Leigh Jig Compatibility: designed specifically to work with the Leigh jig system, this bit takes the guesswork out of setup and helps you achieve beautiful, tight-fitting joinery right out of the box.
Why This Product
- If you own a Leigh dovetail or mortise jig and need a straight bit that fits its specifications precisely, this CMT long-series bit is engineered specifically for that system - eliminating compatibility guesswork and setup frustration.
- The 1 1/4 in. cutting height paired with a 3 1/4 in. total length gives you routing depth that standard-series straight bits cannot reach, making this the right choice when working with thick panels, deep dadoes, or full through-cuts.
- Tungsten carbide (HW) tipped construction means this bit stays sharp through extended production runs in hardwood, softwood, plywood, MDF, chipboard, melamine, laminates, and plastic - reducing tool changes and maintaining consistent cut quality across materials.
- The 1/2 in. shank maximizes stability in the router collet, which translates directly to straighter grooves, less chatter, and a cleaner finished surface - especially important in joinery work where precision fit matters.
Specifications
- Manufacturer Part Number: 812.611.11
- Brand: CMT Orange Tools
- Diameter: 7/16 in.
- Cutting Height: 1 1/4 in.
- Total Length: 3 1/4 in.
- Shank: 1/2 in.
- Number of Teeth: 2
- Blade Material: HW (Hard Metal / Tungsten Carbide)
- Rotation: Right-Hand (RH)
- Product Type: Straight Bit, Long Series
Approved Applications
- Leigh Jig Routing
- Deep Straight Cuts
- Dadoes and Grooves
- Template Routing
- Panel Joinery
- Solid Hardwood
- Softwood
- Plywood
- MDF
- Chipboard
- Laminates
- Melamine
- Plastic
Frequently Asked Questions
Is this bit compatible with the Leigh dovetail jig?
Yes. This CMT long-series straight bit is specifically noted for use with the Leigh jig, and its 7/16 in. diameter and 1/2 in. shank are sized to work within that system for clean, precise joinery cuts.
What is the difference between a long-series straight bit and a standard-series straight bit?
A long-series bit has a greater total length - in this case 3 1/4 in. - which allows it to reach deeper into the workpiece and achieve a cutting height of 1 1/4 in. Standard-series bits are shorter and intended for shallower cuts. The long-series design is the correct choice when routing deep dadoes, full through-cuts in thick panels, or when jig geometry requires extended reach.
Will this bit fit my router if it has a 1/2 in. collet?
Yes. This bit is designed with a 1/2 in. shank, which seats directly into any router fitted with a 1/2 in. collet. It is compatible with handheld routers, router tables, and CNC routing machines that accept a 1/2 in. shank.
What materials can this straight bit cut cleanly?
The tungsten carbide (HW) tipped cutting edges and two-flute right-hand rotation make this bit well suited for routing solid hardwood, softwood, plywood, MDF, chipboard, laminates, melamine, and plastic, producing a clean edge on the finished piece across all of these materials.
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