Product Description
CMT Four Flute Dowel Drill - 5/16" x 65 x 105mm Right-Hand by CMT is an extra-long carbide-tipped boring tool engineered for precise blind-hole drilling in furniture manufacturing, cabinet making, and panel processing applications. Built around a super-strength steel body with a PTFE-coated cutter portion, this right-hand rotation drill delivers consistently clean, flat-bottom holes in solid wood, chipboard, MDF, and laminated panels on CNC boring centers. The 105mm overall length makes it the right choice for deep-reach blind holes where a standard-length dowel drill cannot achieve adequate depth without repositioning or tool changes.
Key Features
- Tungsten carbide (HW) cutting head with precision-balanced centre point - maintains accurate bore positioning even at high cycle rates on multi-spindle CNC machines, reducing runout and hole placement error.
- 2 precision-ground carbide cutting edges (Z2) - deliver sharp, repeatable cuts through hardwood, softwood, chipboard, MDF, HDF, and coated panels without premature edge wear.
- 2 negatively ground spurs (V2) - score the wood fiber cleanly ahead of the cutting edges, producing smooth bore walls and crisp hole entrances with no tearout on finished or laminated surfaces.
- 4 spiral flutes - evacuate chips efficiently from deep blind holes, reducing heat buildup and preventing chip packing that can cause bore wall damage or stalled spindles.
- PTFE-coated cutter portion - resists pitch, resin, and glue buildup during production runs, keeping the tool cutting freely and extending service life between sharpenings.
- Super-strength steel body - provides the rigidity needed for deep-reach drilling at 105mm overall length without deflection, keeping hole geometry accurate from entry to full depth.
- Parallel shank with driving flat and length-adjusting feature - 10x30mm - ensures positive drive engagement and precise depth setting in CNC boring center chucks or adapter collets, eliminating slippage during operation.
- Right-hand (RH) rotation - matches the standard spindle direction of most CNC boring centers and panel processing equipment, making setup straightforward and tool changes fast.
Why This Product
- The 65mm cutting height combined with a 105mm overall length gives this drill the reach needed for deep blind holes required in thick panel constructions and solid-wood furniture joinery - applications where shorter dowel drills fall short.
- The combination of negatively ground spurs and a precision-balanced carbide centre point means the drill self-registers accurately on contact, producing repeatable, clean-walled holes in laminated and coated panels without surface chipping - critical in finished cabinet and furniture work.
- Four spiral flutes provide twice the chip clearance of a standard two-flute dowel drill, making this tool particularly well-suited for high-feed CNC boring centers where chip evacuation directly affects cycle time and hole quality.
- The PTFE-coated spiral and HW construction together address the two most common causes of premature dowel drill failure - pitch/glue adhesion and cutting edge wear - keeping the tool productive across extended production runs in chipboard, MDF, and composite panel applications.
Specifications
- Manufacturer Part Number: 372.080.11
- Brand: CMT Orange Tools
- Diameter: 5/16"
- Cutting Height: 65mm
- Total Length: 105mm
- Shank: 10x30mm
- Number of Cutting Edges: 2 (Z2)
- Number of Spurs: 2 (V2)
- Number of Flutes: 4
- Spur Grind: Negatively ground spurs
- Blade Material: Carbide (HW)
- Body Material: Super-strength steel
- Cutter Coating: PTFE (black or orange)
- Rotation: Right-hand (RH)
- Shank Style: Parallel shank with driving flat and length adjusting
Approved Applications
- Blind-hole drilling for dowel connections in solid wood and engineered panels
- Deep blind-hole boring in thick panel constructions
- Panel drilling on large CNC boring centers and panel processing centers
- Furniture manufacturing and component assembly
- Cabinet making and casework production
- Drilling in chipboard, MDF, HDF, hardwood, softwood, plywood, laminates, and coated panels
Frequently Asked Questions
What machines is this dowel drill compatible with?
This drill is designed for use on multi-spindle CNC boring machines, CNC boring centers, and panel processing centers. Its 10x30mm parallel shank with driving flat and length-adjusting feature ensures positive engagement in standard chucks and adapters used on this type of equipment.
Why does this drill have 4 flutes instead of the typical 2 found on standard dowel drills?
The four spiral flutes provide enhanced chip evacuation from deep blind holes. This is especially important at the 65mm cutting depth this tool achieves, where chip packing can damage bore walls or stall spindles. More flute channels mean faster clearing of material and less heat accumulation during high-cycle production runs.
What is the purpose of the PTFE coating on the cutter portion?
The PTFE coating on the spiral prevents pitch, resin, and adhesive buildup from accumulating on the tool during cutting. This keeps the flutes clear and the cutting edges working freely, which extends the time between sharpenings and maintains consistent hole quality across production runs involving chipboard, MDF, and other adhesive-bonded composite materials.
What is the difference between negatively ground spurs and standard spurs on a dowel drill?
Negatively ground spurs are angled to score and sever the surface wood fiber before the main cutting edges engage. This geometry is specifically effective at preventing tearout on the face of finished panels, laminates, and coated boards - producing a clean, defined hole entrance that is important in furniture and cabinet applications where visible surfaces must remain undamaged.
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