Product Description
CMT 374.080.11 4 Flute Dowel Drill for Through Holes - 5/16" x 2-17/64" by CMT is a precision-engineered through-hole dowel drill designed for clean, accurate boring in solid wood, chipboard, MDF, and laminates. Built with a tungsten carbide (HW) cutting edge and right-hand rotation, this drill delivers consistent through-hole results in high-volume production environments such as CNC boring centers and multi-spindle boring machines. The 5/16" diameter and 30mm cutting height make it well-suited for dowel joinery, shelf pin holes, and panel processing applications where exit-side blowout cannot be tolerated.
Key Features
- Tungsten Carbide (HW) Cutting Material - provides exceptional hardness and edge retention, reducing re-sharpening frequency and keeping production moving through demanding panel materials like chipboard, MDF, HDF, and coated laminates.
- Through-Hole Geometry with 60 deg. Sharpening Angle - engineered specifically for through-hole drilling, this geometry cleanly exits the workpiece without blowout, producing a finished bore on both faces of the panel without secondary sanding or cleanup.
- Right-Hand (RH) Rotation - optimized for standard right-hand spindle configurations found on CNC boring centers and multi-spindle panel processing machines, ensuring immediate compatibility with common production setups.
- 5/16" Diameter with 30mm Cutting Height - sized precisely for standard dowel joinery applications, the 30mm cutting height accommodates common panel thicknesses and allows full through-boring in a single plunge.
- 10 x 20mm Shank - the robust shank provides rigid clamping in boring machine chucks and adapters, minimizing runout and vibration for cleaner hole walls and longer tool life.
- 2-Tooth (Flute) Configuration - the 2-tooth cutting geometry balances chip clearance and cutting speed, preventing chip packing in through-hole applications and supporting consistent hole quality across long production runs.
- Compact 57.5mm Total Length - the compact overall length suits tight spindle clearances in multi-spindle boring heads, allowing use in densely packed CNC boring configurations without interference.
Why This Product
- Engineered for blowout-free through-hole boring - the 60 deg. through-hole sharpening geometry exits cleanly on both panel faces, making this drill the right choice when finished appearance on the exit side matters - such as visible panel backs in furniture and cabinetry.
- Tungsten carbide construction extends tool life in abrasive sheet goods - materials like MDF, chipboard, and laminates are notoriously abrasive, and the HW carbide cutting edge holds its sharpness far longer than standard high-speed steel, keeping downtime low in production environments.
- Right-hand rotation ensures drop-in compatibility - with RH spindle configurations being standard on most CNC boring centers and panel processing equipment, this drill installs and runs without any machine modification or special adapter requirements.
- Precision shank geometry supports accurate, repeatable hole placement - the 10 x 20mm shank secures firmly in boring machine chucks, reducing runout and ensuring that hole placement stays consistent across an entire production batch - critical for dowel joint alignment and shelf pin accuracy.
Specifications
- Manufacturer Part Number: 374.080.11
- Brand: CMT Orange Tools
- Diameter: 5/16"
- Cutting Height: 30mm
- Total Length: 57.5mm
- Shank: 10 x 20mm
- Number of Teeth: 2
- Tooth Geometry: Through holes 60
- Rotation: Right-hand (RH)
- Blade Material: HW (Tungsten Carbide)
- Series: Through Hole Series
Approved Applications
- Multi-Spindle CNC Boring Machine
- CNC Boring Center
- Panel Processing Center
- Boring Machine with Adapter or Chuck
- Solid Wood Panels
- Chipboard and Particle Board
- MDF and HDF
- Hardwood and Softwood
- Plywood
- Laminates and Coated Panels
- Dowel Joinery and Shelf Pin Boring
- Cabinet and Furniture Panel Processing
Frequently Asked Questions
What is the difference between a through-hole dowel drill and a blind-hole dowel drill?
A through-hole dowel drill, like this CMT 374.080.11, is sharpened with a geometry - in this case a 60 deg. through-hole angle - that allows the bit to exit the workpiece cleanly without tearing or splintering the far face. A blind-hole drill is designed to stop at a set depth and typically has a flat or brad-point tip optimized for a smooth hole bottom rather than a clean exit. If your application requires a finished hole on both faces of the panel, a through-hole drill is the correct choice.
What shank size does this drill use, and will it fit my boring machine?
This drill uses a 10 x 20mm shank. This is a common shank size for panel boring machine applications, including multi-spindle CNC boring heads and CNC boring centers with compatible chucks or adapters. Always confirm your machine's chuck or spindle accepts a 10mm diameter shank before ordering.
Can this drill be resharpened, and what sharpening specification applies?
Yes. This CMT through-hole dowel drill is designed to be resharpened. The sharpening specification is "Through holes 60," meaning it should be reground to the 60 deg. through-hole geometry to preserve correct cutting performance and blowout-free exit characteristics after each sharpening cycle.
Is this drill suitable for laminated or coated panel materials?
Yes. The tungsten carbide (HW) cutting edge is well suited for abrasive sheet materials including laminates and coated panels. The through-hole geometry also helps prevent the surface laminate from chipping or lifting as the drill exits the panel, supporting clean finished holes in coated workpieces.
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