Product Description
CMT 811.158.11 Straight Bit Short Series by CMT is a compact, 2-flute router bit engineered for precision grooving, dadoing, and mortising in solid hardwood, plywood, composites, and a wide range of natural woods. With a 5/8 in. cutting diameter and a 1/4 in. shank, this short-series straight bit is built for efficient, clean cuts in both handheld routers and router table setups. The short overall profile delivers excellent rigidity, making it a reliable choice for high-volume production work and detail-oriented woodworking alike.
Key Features
- Micrograin Carbide Cutting Edges - harder and denser than standard carbide, these edges stay sharp longer under heavy production loads, reducing downtime and replacement frequency.
- FATIGUE-PROOF Steel Body - the bit body is constructed from special fatigue-proof steel that absorbs stress during demanding cuts, helping prevent fracture or deformation over extended use.
- CMT Orange Non-Stick P.T.F.E. Coating - the orange protective surface coating resists resin, pitch, and residue buildup, keeping the bit running cooler and cleaner for a longer effective service life.
- 2-Flute (Double-Edged) Design - two cutting edges provide balanced chip evacuation and a smooth cutting action, resulting in cleaner groove walls in plywood, MDF, and solid wood.
- Right-Hand Rotation - compatible with standard router spindle direction, ensuring straightforward drop-in use on handheld routers, router tables, and CNC routing machines.
- Strict Quality Testing for Tolerance, Balance, and Concentricity - every bit passes rigorous inspection before leaving the factory, so you get consistent, repeatable cut quality on every pass.
Why This Product
- The short-series design provides greater rigidity than standard-length straight bits, reducing deflection and chatter when routing dadoes or mortises in dense hardwoods and composite panels.
- The combination of fatigue-proof steel and micrograin carbide means this bit is built to handle industrial-scale production volumes without sacrificing cut quality - ideal for shops running repetitive joinery operations.
- The P.T.F.E. non-stick orange coating actively reduces pitch and resin adhesion, cutting down on cleaning time between operations and protecting the tool against corrosion during storage.
- With a 1/4 in. shank, this bit fits a wide range of compact and mid-size routers, making it a versatile addition for both professional woodworkers and production facilities working with plywood joinery, mortising, or template routing.
Specifications
- Manufacturer Part Number: 811.158.11
- Brand: CMT Orange Tools
- Diameter: 5/8 in.
- Cutting Height: 3/4 in.
- Total Length: 2-5/8 in.
- Shank: 1/4 in.
- Number of Teeth: 2
- Material: HW (Micrograin Carbide)
- Rotation: Right-Hand (RH)
- Product Type: Straight Bit Short Series
Approved Applications
- Straight cuts - dadoes, grooves, and rabbets
- Mortising
- Template routing
- Plywood joinery and panel work
- Routing in composites and natural woods
Frequently Asked Questions
What materials can this straight bit cut through?
This bit is suited for a variety of materials including solid hardwood, softwood, plywood, composites, and other natural woods. The micrograin carbide edges and fatigue-proof steel body are built to handle even heavy production workloads across these material types.
What is the purpose of the orange P.T.F.E. coating on this bit?
The orange non-stick P.T.F.E. coating is CMT's proprietary surface treatment designed to prevent resin, pitch, and other residue from adhering to the bit during cutting. This helps keep the bit cooler, reduces cleaning time, and protects the tool surface against corrosion.
Is this bit compatible with a standard handheld router?
Yes. The 1/4 in. shank is a common router collet size compatible with many handheld routers, router tables, and CNC routing machines that accept right-hand rotation bits. Always confirm your router's collet size before use.
Why choose a short-series straight bit over a standard-length bit?
Short-series straight bits have a reduced overall length - 2-5/8 in. total in this case - which improves rigidity and minimizes deflection during cuts. This makes them particularly well suited for dadoing, mortising, and groove work where precision and stability matter more than maximum cutting depth.
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