Product Description
CMT 310.060.22 Dowel Drill 6 x 22 x 57.5mm LH is a left-hand rotation boring bit engineered from premium super-micrograin solid carbide for precision blind-hole drilling in demanding furniture manufacturing and cabinet making environments. Designed for use on high-speed multi-spindle boring machines and CNC routing centers, this short-series dowel drill delivers exceptionally clean, flat-bottom bores in hardwood, MDF, particle board, plywood, veneered panels, and coated composites - making it a go-to choice wherever tight tolerances and smooth bore walls are non-negotiable.
Key Features
- Solid super-micrograin carbide construction (HWM) - the entire drill body is made from premium Ceratizit carbide, providing extraordinary wear resistance and supporting an almost infinite number of resharpenings, which means longer tool life and a lower cost per bore over the tool's lifetime.
- Curved, negatively ground spurs (2 spurs) - the unique spur geometry scores the perimeter of the bore before the flutes clear material, producing exceptionally clean bore walls with no rough edges or tearout - critical for veneered and coated panels where surface quality is essential.
- Plunge edge running to the centre of the bit - reduces drilling resistance during entry, which increases production speed and reduces heat buildup on high-volume boring runs.
- Centre-point balanced tip - ensures the drill self-centres accurately on entry, reducing bit wander and maintaining consistent hole positioning across repeated operations on CNC and multi-spindle machines.
- 2 cutting edges and 2 spiral flutes (Z2, V2) - efficient chip evacuation keeps the bore clean during drilling and reduces the risk of heat-related damage to sensitive panel surfaces.
- 10 x 27mm parallel shank with driving flat - provides secure seating in boring machine chucks and adapters, preventing slippage under the rotational loads of high-speed production equipment.
- Left-hand (LH) rotation - engineered specifically for left-hand spindle positions on multi-spindle boring machines, ensuring the correct cutting geometry and chip clearance direction for those stations.
- Extreme sharpening rating - the solid carbide body can be resharpened to a higher precision standard than brazed or steel-body alternatives, extending the productive service life of the tool significantly.
Why This Product
- When drilling dowel connection holes in veneered panels or coated board, clean entry and exit matter as much as hole size accuracy - the curved, negatively ground spurs on this bit score the surface cleanly before material is removed, preventing the chipping and delamination that can ruin finished panels.
- Solid carbide construction throughout - not just a carbide tip - means this drill withstands the prolonged, high-cycle demands of CNC boring centers and multi-spindle machines far better than mixed-material alternatives, and retains its geometry far longer between maintenance intervals.
- The short-series 57.5mm overall length is optimized for blind-hole dowel boring in panel processing applications where bit-to-bit clearance on multi-spindle heads is tight - longer shanks risk interference, making this compact profile the correct choice for those setups.
- Left-hand rotation is a specific engineering requirement for certain spindle positions on multi-row boring machines - this bit is purpose-built for that configuration, so installers do not need to adapt a right-hand tool or risk incorrect cutting action.
Specifications
- Manufacturer Part Number: 310.060.22
- Brand: CMT Orange Tools
- Diameter: 6mm
- Cutting Height: 7/8 in.
- Total Length: 57.5mm
- Shank: 10 x 27mm
- Number of Teeth: 2
- Number of Spurs: 2
- Rotation: Left-hand (LH)
- Blade Material: HWM (super-micrograin solid carbide)
- Sharpening: Extreme
Approved Applications
- Blind hole drilling for dowel joinery connections
- Panel drilling in furniture and cabinet manufacturing
- High-speed multi-spindle boring machine operations
- CNC boring center and CNC router applications
- Panel processing center operations
- Hardwood and solid wood boring
- Particle board and chipboard drilling
- MDF and HDF boring
- Veneered and coated panel drilling
- Difficult composite material boring
Frequently Asked Questions
What makes this dowel drill suitable for veneered and coated panels?
The curved, negatively ground spurs score the panel surface cleanly around the perimeter of the bore before the flutes remove material. This prevents delamination, chipping, and rough edges at the bore entry - which is especially important on high-value veneered wood, laminates, and coated composite panels common in furniture and cabinet production.
Can this bit be resharpened, and how many times?
Yes. Because the drill is constructed entirely from solid super-micrograin carbide rather than a steel body with a brazed tip, it can be resharpened to an extreme precision standard. The solid carbide construction supports an almost infinite number of resharpenings, since there is no brazed joint to compromise and the carbide body retains its structural integrity through repeated grinding cycles.
Why does the rotation direction matter, and how do I know if I need a left-hand bit?
Multi-spindle boring machines position spindles in both left-hand and right-hand rotating configurations. Using a right-hand bit in a left-hand spindle position reverses the cutting geometry, causing the tool to scrape rather than cut - resulting in rough bores, accelerated wear, and potential bit damage. This bit is specifically designed for left-hand (LH) spindle positions. Check your boring machine's spindle rotation chart for each station before selecting bits.
What shank size does this bit use, and what machines will accept it?
This bit has a 10 x 27mm parallel shank with a driving flat. This shank configuration is standard for multi-spindle CNC boring machines, boring centers, and panel processing centers. It can also be used on boring machines fitted with a compatible adapter or chuck that accepts a 10mm parallel shank with driving flat.
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