Product Description
The CMT 811.158.11B Pattern Bit with Bearing is a 2-flute, right-hand rotation straight router bit engineered for precise template routing, pattern work, and flush trimming on natural woods, plywood, composites, and more. With a 1/4 in. shank and a 5/8 in. cutting diameter, this compact bit delivers clean, repeatable cuts guided by an integrated bearing - making it a reliable choice for woodworkers and production shops that demand consistent results. Built from micrograin carbide on a fatigue-proof steel body and finished with CMT's signature orange non-stick coating, it resists heat, resin buildup, and wear through demanding routing sessions.
Key Features
- Micrograin Carbide Cutting Edges (HW Material) - harder, denser carbide maintains a sharper edge longer through heavy workloads, reducing the frequency of bit changes during production runs.
- Fatigue-Proof Steel Body - the specially formulated steel body resists stress fractures under continuous load, delivering dependable performance even during extended use on solid hardwood and composites.
- Orange Non-Stick P.T.F.E. Coating - protects the bit surface from resin, pitch, and residue accumulation, keeping the flutes clear so cuts stay clean and the bit runs cooler over time.
- Integrated Bearing Guide - rides flush along a template or workpiece edge to produce consistently accurate, repeatable profiles without manual measurement, making this bit ideal for pattern routing and flush trimming.
- 2-Flute Right-Hand Rotation Design - dual cutting edges ensure smooth chip evacuation and a finer surface finish on each pass through wood, plywood, and sheet goods.
- Strict Quality Testing for Balance and Concentricity - every bit is inspected to guarantee cutting tolerance, balance, and concentricity, which translates to reduced vibration and a cleaner cut at the router table or with a handheld router.
Why This Product
- The bearing guide follows any template or straight edge precisely, making this bit an efficient solution for duplicating parts, routing patterns, and flush-trimming plywood or solid wood without complex setups.
- Micrograin carbide combined with a fatigue-proof steel body means the bit holds up through industrial-scale production volumes on demanding materials like composites, MDF, and hardwoods - without premature dulling.
- The 1/4 in. shank and 2-5/8 in. total length make this bit compatible with a wide range of handheld routers and router tables, giving woodworkers flexibility across different machines without needing a specialty collet.
- The P.T.F.E. non-stick coating reduces cleanup time and extends usable tool life by preventing pitch and resin from bonding to the bit surface - a practical advantage in high-frequency production environments.
Specifications
- Manufacturer Part Number: 811.158.11B
- 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)
- Coating: Orange Non-Stick P.T.F.E.
- Body Material: Fatigue-Proof Steel
Approved Applications
- Template and pattern routing
- Flush trimming
- Straight cuts including dadoes, grooves, and rabbets
- Mortising
- Plywood joinery
- Routing natural woods, plywood, composites, and similar sheet goods
Frequently Asked Questions
What is the purpose of the bearing on this pattern bit?
The integrated bearing rides along a template or the edge of a workpiece, guiding the bit to produce a perfectly repeatable cut that matches the template shape. This makes the bit well suited for pattern routing, flush trimming, and duplicating parts with consistent accuracy pass after pass.
What materials can this bit cut through?
This bit is designed for use on a variety of materials including solid hardwood, softwood, plywood, composites, and similar wood-based sheet goods. The micrograin carbide cutting edges are built to handle even heavy production workloads across these materials.
What routers is this bit compatible with?
The 1/4 in. shank fits the standard 1/4 in. collets found on most handheld routers and router tables. Always confirm your router accepts a 1/4 in. shank before use.
How does the orange P.T.F.E. coating benefit the bit during use?
The non-stick P.T.F.E. coating prevents resin, pitch, and other residue from adhering to the bit surface. This helps keep the flutes clear for cleaner cuts, reduces friction-related heat buildup, and makes post-use cleaning easier - extending the working life of the bit.
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