Product Description
CMT Pattern Bits - 5/16" Diameter, 1/4" Shank are precision-engineered straight bits designed for template routing, pattern duplication, and guided cutting operations in both shop and production environments. Built from special fatigue-proof steel and micrograin carbide, these bits are suited for routing solid hardwood, softwood, plywood, composites, and other sheet materials with consistent, repeatable accuracy. The 2-tooth right-hand rotation design delivers clean cuts whether you are working at the bench with a handheld router or running parts on a router table or CNC routing machine.
Key Features
- Micrograin carbide cutting edges (HW material grade) - a denser, harder carbide formulation that resists wear under heavy production workloads, extending the usable life of the bit between sharpenings.
- Fatigue-proof steel body - the body is engineered to absorb vibration and repeated stress cycles without cracking or deflecting, which helps maintain cut accuracy over long production runs.
- CMT Orange non-stick P.T.F.E. coating - the protective surface layer prevents resin, pitch, and wood residue from bonding to the bit, reducing heat buildup and making cleanup faster between operations.
- 2-flute right-hand rotation geometry - two cutting edges distribute the workload evenly, promoting balanced chip evacuation and a smoother finished surface on every pass.
- Strict quality testing for tolerance, balance, and concentricity - every bit is verified to hold tight dimensional tolerances before leaving the factory, meaning the 5/16" cutting diameter stays true and the bit runs smoothly without wobble.
- 1/4" shank diameter - compatible with a wide range of handheld routers, compact router tables, and trim routers that accept 1/4" collets, making this bit highly versatile across common workshop setups.
Why This Product
- Precise pattern and template work in a compact profile - the 5/16" cutting diameter gives you a narrow profile that follows templates and guides cleanly without removing more material than intended, which is critical when duplicating parts to tight tolerances.
- Handles heavy production without breaking down - the combination of micrograin carbide and fatigue-proof steel means this bit is built beyond light hobby use; it is rated for industrial-scale production across plywood, composites, and natural woods.
- Reduced downtime from pitch and resin fouling - the P.T.F.E. non-stick coating keeps the flutes clear during extended use, so you spend less time cleaning the bit and more time cutting.
- 1" cutting height in a 2 3/4" overall length - this short-series length keeps the bit stiff and minimizes deflection, which translates to straighter walls in dadoes, grooves, and mortises even when cutting at full depth.
Specifications
- Manufacturer Part Number: 811.081.11B
- Brand: CMT Orange Tools
- Diameter: 5/16"
- Cutting Height: 1"
- Total Length: 2 3/4"
- Shank: 1/4"
- Number of Teeth: 2
- Material: HW (Micrograin Carbide)
- Rotation: Right-Hand (RH)
Approved Applications
- Template routing and pattern duplication
- Straight cuts including dadoes, grooves, and rabbets
- Mortising
- Plywood joinery
- Routing solid hardwood, softwood, plywood, composites, and natural woods
Frequently Asked Questions
What machines are compatible with this bit?
This bit has a 1/4" shank and is compatible with handheld routers, router tables, and CNC routing machines that accept a 1/4" collet. Always verify your router's collet size before use.
What is the cutting diameter and how does it affect my work?
The cutting diameter is 5/16". This narrow diameter makes the bit well suited for precise pattern routing and template-guided cuts where a smaller profile is needed to follow tight curves or narrow grooves accurately.
What does the P.T.F.E. coating do and will it affect cut quality?
The orange P.T.F.E. non-stick coating is applied to the bit body to prevent resin, pitch, and other residue from sticking to the surface during cutting. This helps keep the bit running cooler, reduces the frequency of cleaning, protects against corrosion, and helps maintain consistent cut quality over time.
Is this bit suitable for production use or only light hobby work?
This bit is built for industrial-scale production. The micrograin carbide cutting edges and fatigue-proof steel body are specifically designed to withstand heavy, repeated workloads across materials such as plywood, composites, and natural woods. Each bit also passes strict quality tests for cutting tolerance, balance, and concentricity before it is released.
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