Product Description
CMT 368.050.11 Dowel Drill for Through Holes is a precision carbide-tipped boring bit engineered for clean, accurate through-hole drilling in wood panels and sheet goods. Designed for right-hand rotation and built to a long-series length, this 2-flute dowel drill handles solid wood, chipboard, MDF, HDF, laminates, and coated panels with consistent, professional results. Whether you are running a multi-spindle CNC boring machine or a dedicated panel boring center, this bit delivers the cutting performance and tool life demanded by high-volume woodworking and cabinetmaking operations.
Key Features
- Tungsten Carbide (HW) Cutting Material - hard carbide construction retains a sharp edge longer than high-speed steel alternatives, reducing downtime for bit changes in production environments.
- 2-Flute Geometry - dual cutting edges balance chip evacuation and cutting speed, producing smooth bore walls in through-hole applications without excessive heat buildup.
- Long-Series Cutting Height of 43mm (1 11/16") - extended cutting depth handles thick panels and multi-layer assemblies where a standard-length bit would fall short.
- 5mm Diameter Cutting Edge (13/64") - sized precisely for standard dowel joinery, shelf-pin holes, and through-bore cabinet hardware without requiring enlargement or secondary operations.
- 8x20mm Parallel Shank with Driving Flat - positively locates and locks in multi-spindle boring heads and CNC chuck holders, preventing slippage under high-cycle production loads.
- Right-Hand (RH) Rotation - correct rotational direction for standard CNC boring spindles and bench-top boring machines, ensuring immediate compatibility without adapter modifications.
- Through-Hole Design with 60 deg. Sharpening Angle - geometry is optimized for boring clean entry and exit faces in full through-hole passes, minimizing tearout on both panel surfaces.
- 70mm Total Length - overall length provides adequate clearance for spindle housings and boring head bodies in multi-spindle configurations, reducing interference and setup time.
Why This Product
- Purpose-built for through-hole boring in panel processing - unlike general-purpose twist drills, the 60 deg. sharpening angle and long-series cutting height are specifically matched to the demands of through-hole dowel and hardware boring in chipboard, MDF, and laminated panels.
- Compatible with standard 8mm boring spindles - the 8x20mm shank with driving flat fits directly into the most common multi-spindle CNC boring machine heads and boring centers without requiring special adapters, saving setup time.
- Carbide construction supports high-cycle production - HW (tungsten carbide) material outlasts standard steel bits in abrasive materials like chipboard and MDF, meaning fewer interruptions and lower per-hole tooling cost over a production run.
- Correct geometry for clean double-face results - the 2-flute through-hole configuration is designed to exit the panel cleanly, which matters when both faces of a finished cabinet panel are visible after assembly.
Specifications
- Manufacturer Part Number: 368.050.11
- Brand: CMT Orange Tools
- Diameter: 5mm (13/64")
- Cutting Height: 43mm (1 11/16")
- Total Length: 70mm (2 3/4")
- Shank: 8x20mm
- Number of Flutes: 2
- Blade Material: HW (Tungsten Carbide)
- Rotation: Right-Hand (RH)
- Sharpening Angle: Through holes 60 deg.
- Application Type: Through Holes
Approved Applications
- Chipboard and particle board panels
- MDF (medium-density fiberboard)
- HDF (high-density fiberboard)
- Solid hardwood and softwood
- Plywood
- Laminates and coated panels
- Through-hole dowel joinery boring
- Cabinet hardware through-hole boring
- Multi-spindle CNC panel boring operations
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 368.050.11, is ground with a geometry and sharpening angle (60 deg. in this case) that allows it to exit the opposite face of a panel cleanly with minimal tearout on both surfaces. A blind-hole drill is optimized to stop at a precise depth inside the panel without breaking through. Using a through-hole bit for full-penetration boring in cabinet panels and furniture components ensures a clean finish on both the visible entry and exit faces.
Will this bit fit my multi-spindle boring machine?
This bit features an 8x20mm parallel shank with a driving flat, which is the standard shank size used by the majority of multi-spindle CNC boring machines, CNC boring centers, and panel processing centers. If your machine accepts 8mm shanks - which is the industry-standard diameter for dowel drilling heads - this bit will seat and lock directly into the spindle without additional adapters.
What materials can this dowel drill bore through?
The HW (tungsten carbide) cutting material and 2-flute geometry make this bit suitable for chipboard, MDF, HDF, solid hardwood, softwood, plywood, laminates, and coated panels. Carbide construction is particularly valuable in abrasive engineered wood products like chipboard and MDF, where high-speed steel bits dull quickly and produce rough bore walls.
Is this bit designed for right-hand or left-hand spindle rotation?
This bit is designed for right-hand (RH) rotation only. When installed in a standard right-hand boring spindle, the cutting edges engage the material correctly to produce a clean bore. Using a right-hand bit in a left-hand spindle will cause rubbing rather than cutting and will damage both the bit and the workpiece. Verify your machine's spindle rotation direction before installing this or any directional boring bit.
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