Product Description
CMT Four Flute Dowel Drill 12 x 65 x 105mm Left-Hand (LH) by CMT is a precision carbide-tipped boring tool engineered for deep blind hole drilling in panel processing, furniture manufacturing, and cabinet making. Built on a super-strength steel body with a tungsten carbide (HW) cutting head, this left-hand rotation drill delivers clean, flat-bottom holes in solid wood, chipboard, MDF, laminates, and coated panels. Its four spiral flutes enable efficient chip evacuation in demanding CNC boring center applications where accuracy and surface quality are non-negotiable.
Key Features
- Four Spiral Flutes - rapid, continuous chip evacuation during deep blind hole drilling reduces heat buildup and keeps the cutting zone clear for consistent bore quality throughout the full 65mm cutting depth.
- HW (Tungsten Carbide) Cutting Head with 2 Precision Ground Cutting Edges (Z2) - hard carbide material maintains sharp, accurate cutting geometry across extended production runs in chipboard, MDF, hardwood, and laminates, reducing sharpening intervals and tool replacement costs.
- 2 Negatively Ground Spurs (V2) - negatively set spurs score the material perimeter before the cutting edges engage, producing clean bore walls, crisp entry points, and flat-bottom holes with virtually no tearout or rough edges.
- PTFE Coating on Cutter Portion (Black or Orange) - the low-friction PTFE surface prevents pitch, resin, and adhesive buildup on the spiral flutes, maintaining cutting performance and reducing cleaning downtime in glued or coated panel applications.
- Left-Hand (LH) Rotation - designed specifically for left-hand spindle positions on multi-spindle CNC boring centers and panel processing machines, ensuring correct cutting direction and optimal surface finish in those configurations.
- Precision Balanced Centre Point - self-centering tip registers accurately at the drill start position, eliminating wander and keeping hole placement precise on high-volume CNC boring operations.
- Parallel Shank 10 x 30mm with Driving Flat and Length Adjusting - the driving flat prevents shank slippage under load, and the length adjusting feature allows fine depth setting to match specific boring center requirements without additional tooling.
- Extra-Long 105mm Overall Length, 65mm Cutting Height - the extended body reaches deep boring positions on large CNC boring centers where standard-length drills cannot achieve the required depth, expanding the range of panel thicknesses and joint configurations that can be machined.
Why This Product
- Left-hand spindle configurations on multi-spindle CNC boring centers require purpose-built LH rotation drills - using an RH drill in an LH spindle produces incorrect cutting action, poor surface finish, and accelerated wear, making this drill the correct choice for those positions.
- The combination of negatively ground spurs, a precision balanced centre point, and two carbide cutting edges works together to produce flat-bottom blind holes with clean walls - the hallmark requirement for tight-tolerance dowel connections in furniture and cabinet assembly.
- With a 65mm cutting height on a 105mm body, this extra-long series drill handles deep blind holes in thick panels and multi-layer workpieces that standard-length dowel drills simply cannot reach, reducing the need for secondary operations or tooling changes.
- The PTFE-coated flutes and HW carbide construction together address two of the most common causes of production slowdowns - adhesive fouling on the flutes and premature edge wear - keeping throughput high across MDF, chipboard, laminates, and coated panel runs.
Specifications
- Manufacturer Part Number: 372.120.12
- Brand: CMT Orange Tools
- Diameter: 12mm
- Cutting Height: 65mm
- Total Length: 105mm
- Shank: 10 x 30mm (parallel shank with driving flat and length adjusting)
- Rotation: Left-Hand (LH)
- Number of Flutes: 4
- Number of Cutting Edges: 2 (Z2)
- Number of Spurs: 2 (V2)
- Spur Sharpening: Negatively ground spurs
- Blade Material: HW (Tungsten Carbide)
- Body Material: Super-strength steel
- Coating: Black or Orange PTFE on cutter portion
Approved Applications
- Blind hole drilling for dowel connections and furniture joinery
- Panel drilling on large CNC boring centers
- Furniture manufacturing and cabinet making
- Multi-spindle CNC boring center operations
- Panel processing center production runs
- Boring with adapter or chuck on compatible machines
Frequently Asked Questions
Why is this drill left-hand (LH) rotation and when do I need it?
Multi-spindle CNC boring centers and panel processing machines position some spindles to rotate in the left-hand direction. A left-hand rotation drill must be used in those spindle positions so the cutting edges engage the material correctly. Using a right-hand drill in an LH spindle would cause the edges to rub rather than cut, producing poor hole quality and rapid tool wear. This CMT 372.120.12 is specifically designed for those LH spindle positions.
What is the purpose of the negatively ground spurs on this dowel drill?
The 2 negatively ground spurs (V2) score the material surface around the bore perimeter just ahead of the main cutting edges. This clean pre-scoring action severs the wood fibers or laminate face before the cutting edges clear the core material, resulting in crisp entry edges, clean bore walls, and flat-bottom holes with no tearout - critical for dowel joint fit and finished panel appearance.
What materials can this dowel drill be used on?
This drill is suited for solid wood (hardwood and softwood), chipboard, MDF, HDF, plywood, laminates, and coated panels. The HW (tungsten carbide) cutting edges handle the abrasive nature of engineered wood products and laminate surfaces, while the PTFE-coated flutes resist adhesive and resin fouling common in coated panel processing.
What does the PTFE coating on the flutes do?
The black or orange PTFE coating applied to the cutter portion and spiral flutes creates a low-friction surface that resists buildup of pitch, resin, and adhesive - materials that commonly transfer from MDF, chipboard, and coated panels during drilling. By preventing this fouling, the coating helps maintain consistent chip evacuation and cutting performance between cleaning cycles, supporting higher productivity in continuous production environments.
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