Product Description
The CMT 811.501.11 3-Piece Plywood Groove Set by CMT is engineered for woodworkers and production professionals who need precise, clean dadoes and grooves in plywood, composites, and natural wood materials. This set delivers three router bits sized at 15/64", 31/64", and 23/32" - covering the most common plywood panel thicknesses - all on a 1/2" shank for secure, vibration-free performance in handheld routers, router tables, and CNC routing machines. Built from micrograin carbide and fatigue-proof steel, this straight bit short series set is purpose-built for demanding production environments where accuracy, tool longevity, and repeatable results are non-negotiable.
Key Features
- CMT Orange Shield Non-Stick Coating - the proprietary P.T.F.E. surface treatment repels resin, pitch, and residue buildup, reducing friction and heat so the bits stay cleaner between passes and last longer through heavy-duty routing sessions.
- Micrograin Carbide Cutting Edges - finer carbide grain structure means a sharper, more durable cutting edge that holds its tolerance through extended production runs, reducing the frequency of bit changes and downtime.
- Fatigue-Proof Steel Body - the bit body is constructed from special fatigue-proof steel that absorbs the stress of continuous routing without cracking or deforming, making this set reliable even under the heaviest workloads.
- 2-Flute Right-Hand Rotation Design - dual cutting edges paired with right-hand rotation deliver smooth, consistent chip evacuation for clean groove walls in plywood, MDF, laminates, and solid wood.
- Strict Quality Testing for Balance and Concentricity - every bit is individually tested to guarantee cutting tolerance, balance, and concentricity, which translates directly to smooth operation, reduced vibration, and precise groove dimensions every time.
- Three-Size Set (15/64", 31/64", 23/32") - these three diameters are matched to actual plywood panel thicknesses, eliminating the need for multiple passes or shimming and giving you a snug, professional fit straight from the router.
- 1/2" Shank - the larger 1/2" shank provides greater rigidity and reduced runout compared to 1/4" shanks, which is especially important when routing dadoes and grooves where dimensional accuracy directly affects joinery quality.
Why This Product
- Plywood panels rarely match their nominal thickness, which causes sloppy, loose-fitting joinery with standard bits. This three-piece set is sized specifically for real-world plywood dimensions - 15/64", 31/64", and 23/32" - so your dadoes and grooves fit the actual material you are working with, not the label on the sheet.
- For production shops routing composite panels, laminates, or melamine-coated sheet goods, the P.T.F.E. non-stick coating dramatically slows resin and adhesive buildup on the cutting edges, keeping the bits cutting cleanly across longer production runs without constant cleaning interruptions.
- The fatigue-proof steel body and micrograin carbide construction make this set appropriate for demanding industrial-scale production, not just occasional hobby use - professionals routing plywood joinery, cabinet carcasses, and composite assemblies day in and day out will find these bits hold up under that sustained load.
- Strict per-unit quality testing for balance, concentricity, and cutting tolerance means each bit in the set performs predictably, reducing the risk of tear-out, oversized grooves, or vibration-induced chatter that can ruin sheet goods and slow production.
Specifications
- Manufacturer Part Number: 811.501.11
- Brand: CMT Orange Tools
- Set Contents: 3 pieces - Plywood Groove Bit 15/64", Plywood Groove Bit 31/64", Plywood Groove Bit 23/32"
- Shank: 1/2"
- Number of Teeth: 2
- Blade Material: Micrograin Carbide (HW)
- Rotation: Right-hand (RH)
- Product Type: Straight Bit Short Series
Approved Applications
- Plywood joinery dadoes and grooves
- Straight cuts including dadoes, grooves, and rabbets
- Mortising
- Template routing
- Cabinet carcass construction
- Industrial-scale production routing in plywood, composites, and natural woods
What's Included
- 1x Plywood Groove Bit - 15/64" diameter, 1/2" shank
- 1x Plywood Groove Bit - 31/64" diameter, 1/2" shank
- 1x Plywood Groove Bit - 23/32" diameter, 1/2" shank
Frequently Asked Questions
Why are these bits sized 15/64", 31/64", and 23/32" instead of common fractional sizes like 1/4" or 3/4"?
Plywood panels are manufactured to metric or industry-standard thicknesses that are almost always slightly undersized compared to their nominal labels. A sheet sold as 3/4" typically measures closer to 23/32", and so on down the range. These three bit diameters - 15/64", 31/64", and 23/32" - are specifically matched to the actual measured thickness of common plywood panels so that dadoes and grooves accept the panel snugly without play, eliminating the need for multiple passes or shimming to achieve a tight fit.
What machines are compatible with this plywood groove set?
The 1/2" shank on all three bits makes this set compatible with handheld routers, router tables, and CNC routing machines that accept a 1/2" collet. Always confirm your router or CNC spindle supports a 1/2" shank before mounting the bits.
What materials can these router bits cut?
These straight bits are suitable for plywood, composites, natural woods including solid hardwood and softwood, MDF, chipboard, laminates, melamine, and plastic. The micrograin carbide cutting edges and fatigue-proof steel body are built for industrial-scale production across this range of materials.
How does the P.T.F.E. non-stick coating benefit everyday routing work?
The orange P.T.F.E. coating on the bit body acts as a barrier between the steel and the material being routed, preventing resin, pitch, and adhesive residue from bonding to the bit surface. This keeps the bits cleaner during use, reduces friction and heat buildup, and helps protect against corrosion - all of which contribute to a longer usable tool life and more consistent cutting performance over time.
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