Product Description
CMT 311.110.12 Dowel Drill - 11 x 35 x 70mm Left-Hand Rotation by CMT is a precision-engineered, left-hand rotating boring tool built for clean, accurate blind-hole drilling in furniture panels, cabinetry components, and wood-based sheet materials. With a 10x30mm parallel shank, negatively ground spurs, and a tungsten carbide (HW) cutting head, this 2-flute dowel drill delivers flat-bottomed holes with smooth walls - making it the right choice for high-volume panel processing on multi-spindle boring machines and CNC boring centers. The PTFE-coated spiral and precision-balanced centre point help maintain consistent bore quality across chipboard, MDF, hardwood, plywood, laminates, and coated panels.
Key Features
- Hard Metal (HW) Carbide Cutting Head with Precision-Balanced Centre Point - the carbide tip resists wear during high-cycle boring, while the centred point self-locates accurately and reduces wander at entry, resulting in hole-to-hole positional consistency across large panels.
- 2 Negatively Ground Spurs (V2 Sharpening) - shear the outer fibre of the workpiece cleanly before the body of the drill removes material, eliminating tearout on the face of chipboard, laminates, and coated panels where a clean entrance is critical to finished furniture quality.
- 2 Precision-Ground HW Cutting Edges - carbide edges hold sharpness significantly longer than high-speed steel alternatives, reducing resharpening frequency and downtime during continuous panel-boring operations.
- PTFE-Coated Spiral Flutes - the orange or black PTFE coating on the spiral portion reduces friction and prevents pitch, resin, and adhesive buildup in the flutes, keeping chips evacuating freely and extending tool life between cleanings.
- Super-Strength Steel Body - provides the rigidity and vibration resistance needed to maintain bore geometry under the repetitive loading of automated boring machines and CNC panel-processing centres.
- Left-Hand (LH) Rotation - engineered specifically for left-hand spindle positions on multi-spindle boring machines, ensuring correct cutting geometry and proper chip evacuation in machines that require counter-clockwise tooling.
- Parallel Shank with Driving Flat and Length-Adjusting Screw - the 10x30mm parallel shank with driving flat locks securely into boring machine cassettes without slipping under torque, and the length-adjusting screw enables precise depth-of-boring calibration to hit exact blind-hole depths repeatedly.
- 11mm Diameter - 35mm Cutting Height - 70mm Overall Length - the longer 70mm body accommodates deeper panel stacks and spacer configurations common in industrial boring heads, while the 35mm cutting height provides ample usable cutting depth for through-and-through dowel joint preparation.
Why This Product
- Designed for left-hand spindle positions - many multi-spindle boring machines require matched sets of right-hand and left-hand drills to populate opposing spindle rows. This LH drill fills those positions with correct cutting geometry, so every hole in the pattern is produced cleanly regardless of spindle orientation.
- Negatively ground spurs protect finished surfaces - for furniture panels with decorative laminates or coated faces, tearout at the bore entrance is a quality defect that causes rework. The V2 negatively ground spur geometry scores the surface cleanly before cutting, protecting the visible face of the panel.
- PTFE spiral coating reduces maintenance interruptions - in high-throughput cabinet and furniture shops, pitch and adhesive buildup in drill flutes forces production stops for cleaning. The PTFE-coated spiral resists that buildup, keeping the tool running longer between maintenance cycles.
- Length-adjusting screw enables repeatable blind-hole depth - dowel joint integrity depends on holes drilled to a consistent, controlled depth. The integrated length-adjusting screw on the parallel shank lets operators set and lock the exact boring depth, eliminating variation across a full production run.
Specifications
- Manufacturer Part Number: 311.110.12
- Brand: CMT Orange Tools
- Description: Dowel Drill 11x35x70mm LH
- Diameter: 11mm
- Cutting Height: 35mm
- Total Length: 70mm
- Shank: 10x30mm parallel shank with driving flat
- Rotation: Left-Hand (LH)
- Number of Flutes: 2
- Number of Cutting Edges: 2
- Number of Spurs: 2
- Spur Sharpening: Negatively ground spurs
- Blade Material: HW (Hard Metal / Tungsten Carbide)
- Coating: PTFE (orange or black) on spiral portion
Approved Applications
- Blind-hole boring for dowel joint connections in panel furniture
- Cabinet making and carcase assembly hole patterns
- Multi-spindle CNC boring machine operations (left-hand spindle positions)
- CNC boring centre and panel processing centre tooling
- Boring in chipboard, particleboard, and MDF panels
- Drilling in HDF, hardwood, softwood, and plywood
- Processing laminates, coated panels, and plastic sheet materials
Frequently Asked Questions
Why does this dowel drill have left-hand (LH) rotation - and how do I know if my machine needs it?
Left-hand rotation means the drill cuts when rotating counter-clockwise. Multi-spindle boring machines and CNC boring heads use both right-hand and left-hand spindles arranged in a grid pattern across the boring head. Spindles on one side of the head typically rotate in the opposite direction from those on the other side. You need to match the drill's rotation direction to each individual spindle position. Check your machine's spindle layout chart or boring head specifications to confirm which positions require LH tooling before installing this drill.
What does "negatively ground spurs" mean and why does it matter for panel drilling?
Negatively ground spurs are sharpened with a negative rake angle, meaning the cutting edge of the spur is oriented to shear the wood fibre with a slicing action as the drill enters the workpiece. This is particularly important when boring into laminates, melamine-coated panels, or other faced materials where the surface layer is brittle and prone to chipping or tearout at the bore entrance. The spur scores a clean circular perimeter into the face before the body of the drill removes the core material, producing a hole with a crisp, clean edge rather than a ragged or chipped rim.
What is the purpose of the length-adjusting screw on the parallel shank?
The length-adjusting screw allows the operator to set the precise amount of drill protrusion from the boring cassette or chuck, which directly controls the depth of the blind hole being drilled. Because dowel joints require holes drilled to an exact depth - too shallow and the dowel pin will not fully seat, too deep and joint strength is compromised - the ability to fine-tune and lock the depth setting at the tool level is a significant advantage during machine setup. Once set, the screw holds that position consistently across the entire production run.
What materials is this dowel drill compatible with?
This drill is designed for use in solid wood (hardwood and softwood), chipboard, MDF, HDF, plywood, laminates, coated panels, and plastic-based sheet materials. The HW (tungsten carbide) cutting head and negatively ground spurs make it suitable across this range of materials, including abrasive engineered wood products that would rapidly dull high-speed steel tooling. The PTFE-coated spiral helps the drill perform cleanly in adhesive-faced or resin-rich materials by resisting buildup in the flutes.
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