Product Description
CMT 310.020.22 Dowel Drill - 2 x 12 x 57.5mm Left-Hand Rotation is a solid carbide boring bit engineered for precision blind-hole drilling in furniture manufacturing, cabinet making, and panel processing applications. Built entirely from premium super-micrograin carbide sourced from Ceratizit, this left-hand rotating dowel drill delivers exceptionally clean bores with flat bottoms and no rough edges - making it a reliable choice for dowel joinery in hardwood, MDF, particle board, veneered panels, and difficult composite materials. Its compact 57.5mm total length and 10x27mm parallel shank with driving flat make it compatible with multi-spindle CNC boring machines, high-speed boring units, and panel processing centers.
Key Features
- Solid super-micrograin carbide construction (HWM material) - provides exceptional wear resistance and allows an almost infinite number of resharpenings, reducing long-term tooling costs on high-volume production runs.
- 2 curved, negatively ground spurs (V2) - produce exceptionally clean bore walls and flat-bottom holes with no rough edges or tearout, even in veneered and coated panels where surface quality is critical.
- Centre-point balanced tip - ensures accurate hole placement and stable entry on every plunge, reducing drift and improving consistency across repeated drilling cycles on CNC boring centers.
- Plunge edge running to the centre of the bit - reduces drilling resistance and increases production speed, meaning less motor load on multi-spindle machines and faster cycle times.
- 2 cutting edges (Z2) with 2 spiral flutes - efficiently evacuate chips during blind-hole boring, helping maintain bore cleanliness and reducing heat buildup during extended runs.
- Cylindrical head larger than traditional tips - is extremely resistant to prolonged use, maintaining dimensional accuracy over a greater number of holes before resharpening is needed.
- Left-hand (LH) rotation - designed specifically for left-hand spindle positions on multi-spindle boring machines, ensuring correct cutting geometry and preventing bore quality issues caused by using the wrong rotation.
- Parallel shank (10x27mm) with driving flat - provides secure, slip-free seating in standard boring machine chucks and adapters, maintaining positional accuracy across high-speed production cycles.
- Extreme sharpening rating - the solid carbide unit can be resharpened to a high degree, extending the usable life of each bit significantly compared to tipped alternatives.
Why This Product
- Purpose-built for left-hand spindle positions: With dedicated left-hand rotation, this bit works correctly in the left-side spindle positions of multi-spindle CNC boring machines - using a right-hand bit in a left-hand spindle produces poor bore quality, so having the correct rotation is essential for clean, consistent dowel holes.
- Handles demanding materials that dull lesser bits quickly: The premium super-micrograin carbide construction is specifically suited to hardwood, particle board, MDF, and veneered composites - materials that are abrasive and hard on cutting edges - giving fabricators longer runs between tool changes.
- Resharpening economy makes it cost-effective at scale: Because the entire bit is solid carbide rather than a tipped design, it can be resharpened an almost infinite number of times, making it a durable long-term investment for high-volume panel and furniture production environments.
- Optimized for high-speed boring and CNC router use: The chip evacuation geometry, balanced centre point, and reduced drilling resistance work together to maintain performance on fast CNC boring centers - reducing cycle time without sacrificing bore quality.
Specifications
- Manufacturer Part Number: 310.020.22
- Brand: CMT Orange Tools
- Diameter: 2mm
- Cutting Height: 12mm
- Total Length: 57.5mm
- Shank: 10x27mm
- Number of Flutes: 2
- Number of Spurs: 2
- Number of Teeth: 2
- Rotation: Left-Hand (LH)
- Blade Material: HWM Solid Carbide
- Sharpening: Extreme
Approved Applications
- Blind hole drilling for dowel connections
- Panel drilling and panel processing
- Furniture manufacturing
- Cabinet making
- Drilling in hardwood
- Drilling in MDF and HDF
- Drilling in particle board and chipboard
- Drilling in veneered wood and coated panels
- Drilling in difficult composite materials
- High-speed boring unit applications
- CNC router and CNC boring center applications
Frequently Asked Questions
Why does this dowel drill have left-hand (LH) rotation, and does it matter which rotation I use?
Yes, rotation direction matters significantly. Multi-spindle boring machines use both left-hand and right-hand spindle positions. This bit is specifically ground for left-hand rotation, meaning it must be used in a left-hand spindle. Installing a right-hand bit in a left-hand spindle - or vice versa - results in poor bore quality, rough edges, and potential damage to the bit and workpiece.
What makes solid carbide dowel drills different from tipped boring bits?
Because the entire bit is made from one solid piece of premium super-micrograin carbide rather than a steel body with a carbide tip bonded to it, solid carbide bits can be resharpened an almost infinite number of times. There is no tip to delaminate or lose, and the cutting geometry remains consistent through the full usable life of the tool. This makes them especially cost-effective in high-volume production environments.
What materials is this dowel drill designed to bore?
This bit is ideal for hardwood and difficult composites such as particle board, MDF, and veneered wood. The negatively ground carbide spurs and optimized flute geometry handle abrasive engineered panels that wear conventional bits quickly, and the solid carbide construction maintains cutting sharpness over extended production runs in these materials.
What machines is this bit compatible with?
This dowel drill is designed for use on high-speed boring units and CNC routers, as well as multi-spindle CNC boring machines, CNC boring centers, panel processing centers, and boring machines with an adapter or chuck. The 10x27mm parallel shank with driving flat provides secure seating in standard machine chucks used across these platforms.
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