Product Description
CMT 308.110.11 Dowel Drill - 7/16" x 1-3/16" x 2-17/64" RH by CMT is a precision carbide-tipped boring tool engineered for clean, flat-bottom blind holes in panel processing and cabinetry production. With an 11mm cutting diameter, a 30mm cutting height, and a compact 57.5mm overall length, this right-hand rotation dowel drill is purpose-built for multi-spindle CNC boring machines, dedicated boring centers, and panel processing equipment where consistent hole quality and tight tolerances are non-negotiable. Whether you are drilling into solid hardwood, chipboard, MDF, HDF, plywood, or coated laminates, this short-series bit delivers the repeatability professional woodworking operations demand.
Key Features
- HW (Tungsten Carbide) Cutting Material - hard-wearing carbide construction maintains a sharp cutting edge through high-volume production runs, reducing downtime spent on tool changes and regrinding cycles.
- Negatively Ground Spurs (2 spurs) - precision-sharpened spurs slice cleanly through wood fibers and panel surfaces before the main cutter engages, eliminating tearout on bore entry and producing smooth, chip-free hole walls ready for dowel or hardware insertion.
- 2-Tooth Geometry - the dual-tooth configuration balances chip clearance with cutting efficiency, keeping the bore path clear of debris and helping maintain accurate hole depth across repetitive drilling cycles.
- Right-Hand (RH) Rotation - matches standard spindle direction on CNC boring machines and boring centers, ensuring correct chip ejection and consistent hole quality without spindle modification.
- 10x20mm Parallel Shank with Driving Flat - positive engagement in boring machine spindles and adapter chucks prevents slippage under load, keeping the drill accurately positioned throughout the cut.
- Short Series Profile - 57.5mm Total Length - the compact overall length minimizes deflection and vibration during high-speed boring, contributing to straighter, more accurate blind holes especially in dense panel materials.
- 30mm Cutting Height - sufficient cutting depth for standard dowel joint production and hardware boring applications without over-penetrating thin panel stock.
Why This Product
- The negatively ground spur geometry addresses one of the most common problems in panel drilling - surface tearout. By pre-scoring the material boundary before the main carbide teeth engage, this bit produces clean entry holes that require no sanding or patching, saving finishing time on visible face panels and laminates.
- The 10x20mm parallel shank with driving flat is specifically sized for industrial boring machine spindles and CNC boring centers, making this a direct-fit solution for production shops without the need for adapters or custom toolholding setups.
- At 57.5mm total length, the short-series design keeps the tool rigid under continuous cycle loads - a meaningful advantage when running multi-spindle heads where even slight tool deflection can cause misaligned dowel patterns that compromise assembly fit.
- HW carbide construction paired with a 2-tooth, 2-spur configuration provides a balance between cutting aggressiveness and edge longevity, making this dowel drill well-suited for shops processing chipboard, MDF, HDF, hardwood, and coated panels on a daily production basis.
Specifications
- Manufacturer Part Number: 308.110.11
- Brand: CMT Orange Tools
- Description: Dowel Drill 7/16" x 1-3/16" x 2-17/64" RH
- Diameter: 11mm (7/16")
- Cutting Height: 30mm (1-3/16")
- Total Length: 57.5mm (2-17/64")
- Shank: 10x20mm
- Number of Teeth: 2
- Number of Spurs: 2
- Sharpening: Negatively ground spurs
- Blade Material: HW (Tungsten Carbide)
- Rotation: Right-hand (RH)
- Series: Short Series
Approved Applications
- Chipboard and particle board panels
- MDF (medium density fiberboard)
- HDF (high density fiberboard)
- Hardwood and softwood solid lumber
- Plywood
- Laminates and coated panels
- Blind hole dowel joint drilling
- Hardware boring on cabinet and furniture panels
- Multi-spindle CNC boring machine operations
- CNC boring center and panel processing center applications
- Boring machines equipped with an adapter or chuck
Frequently Asked Questions
What shank size does this dowel drill use, and will it fit my boring machine?
This drill uses a 10x20mm parallel shank with a driving flat. This is a standard industrial shank size designed for multi-spindle CNC boring machines, CNC boring centers, panel processing centers, and boring machines equipped with a compatible adapter or chuck. Confirm your machine's spindle accepts a 10x20mm parallel shank before ordering.
What does "negatively ground spurs" mean for hole quality?
Negatively ground spurs are precision-sharpened in a geometry that pre-scores the material surface at the outer edge of the bore before the main carbide teeth remove the bulk of the material. This technique produces clean, tearout-free hole walls and a flat hole bottom - particularly important when drilling laminates, coated panels, and hardwoods where surface quality affects the finished appearance or the fit of a dowel or hardware insert.
Is this drill suitable for through-hole drilling, or only blind holes?
This dowel drill is specifically designed for blind hole drilling - meaning it produces a flat-bottomed hole that does not exit the opposite face of the panel. The 30mm cutting height and short-series 57.5mm total length are optimized for standard dowel joint depths and hardware boring depths in panel processing, not for through-hole applications.
What is the difference between right-hand (RH) and left-hand (LH) rotation, and why does it matter?
Right-hand (RH) rotation means the drill spins clockwise when viewed from the shank end, which is the standard spindle direction on most boring machines and CNC boring centers. Using an RH drill in an RH spindle ensures correct chip ejection direction and proper cutting action. Installing an RH drill in a left-hand spindle - or vice versa - would cause the tool to rub rather than cut, damaging both the bit and the workpiece. Always match the drill rotation to your machine's spindle direction.
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