Product Description
CMT 310.050.21 Dowel Drill - 5 x 22 x 57.5mm, Right-Hand Rotation is a solid carbide boring bit engineered for precise, clean blind-hole drilling in furniture manufacturing, cabinet making, and panel processing. Built entirely from premium super-micrograin carbide sourced from Ceratizit in Luxemburg, this dowel drill delivers long-lasting performance on hardwood, MDF, particle board, veneered panels, and other demanding composites. With a right-hand rotation, 10x27mm parallel shank with driving flat, and a compact 57.5mm overall length, it is purpose-built for high-speed multi-spindle boring machines and CNC routers where accuracy and bore quality are critical.
Key Features
- Solid super-micrograin carbide construction (HWM) - the entire bit is made from premium Ceratizit carbide, providing exceptional wear resistance and allowing an almost infinite number of resharpenings, reducing long-term tooling cost.
- 2 curved, negatively ground spurs (V2) - the unique spur geometry produces exceptionally clean bore walls with no rough edges or tearout, ensuring dowel holes meet tight tolerances in finished panels and hardwood.
- Centre-point balanced tip - keeps the drill tracking true from entry to exit, reducing wander and improving hole-to-hole consistency across multi-spindle setups and CNC boring centers.
- Plunge edge runs to the centre of the bit - reduces drilling resistance and increases production speed, meaning faster cycle times on high-volume panel processing lines.
- Cylindrical head larger than traditional designs - provides extra rigidity and is extremely resistant to prolonged use, maintaining bit geometry longer between services.
- Extreme sharpening grade - the bit is rated for extreme resharpenings as a solid carbide unit, offering added safety over brazed-tip designs and extended service life between tool changes.
- 2 cutting edges and 2 spiral flutes (Z2) - balanced chip evacuation keeps the bore clean during drilling and prevents heat buildup in MDF, chipboard, and other abrasive sheet materials.
- Parallel shank with driving flat (10x27mm) - ensures secure, positive engagement in standard boring machine chucks and CNC tool holders, preventing slippage under load.
- Right-hand rotation (RH) - matches the standard spindle direction of the vast majority of industrial boring machines and CNC routers, enabling direct drop-in use without adapter changes.
Why This Product
- For shops drilling thousands of dowel holes per shift, the solid carbide body means far longer intervals between tool changes compared to standard steel boring bits - keeping production moving on particle board, MDF, and veneered panels without sacrificing bore quality.
- The negatively ground curved spurs produce flat-bottomed, clean-walled holes that are essential for tight-fitting dowel joints in cabinet and furniture assembly - reducing the sanding and cleanup time that rough-edged holes create.
- Because the entire bit is solid carbide rather than a brazed assembly, it can be resharpened an almost unlimited number of times, making it a cost-effective long-term investment for high-production environments.
- With a 5mm diameter and 57.5mm overall length, this bit is sized specifically for standard dowel-joint geometry used in flat-pack furniture and cabinet carcass construction, fitting directly into common multi-spindle boring heads without modification.
Specifications
- Manufacturer Part Number: 310.050.21
- Brand: CMT Orange Tools
- Diameter: 5mm
- Cutting Height: 7/8 in.
- Total Length: 57.5mm
- Shank: 10x27mm
- Number of Spurs: 2
- Number of Teeth: 2
- Rotation: Right-Hand (RH)
- Material: HWM (solid super-micrograin carbide)
- Sharpening Grade: Extreme
Approved Applications
- Blind hole drilling for dowel joinery connections
- Panel drilling in furniture and cabinet manufacturing
- High-speed multi-spindle CNC boring machines
- CNC boring centers and panel processing centers
- Drilling hardwood and softwood solid lumber
- Boring MDF, HDF, and particle board
- Processing veneered panels and coated surfaces
- Drilling difficult composites and laminates
Frequently Asked Questions
What materials can this dowel drill be used on?
This bit is designed for a wide range of materials including hardwood, particle board, MDF, veneered wood, and other difficult composites. The solid super-micrograin carbide construction makes it particularly effective on abrasive sheet goods that would quickly dull standard high-speed steel bits.
Can this bit be resharpened, and how many times?
Yes. Because the bit is constructed entirely from solid carbide rather than a brazed-tip assembly, it supports an almost infinite number of resharpenings. The solid unit construction also provides extra safety during the resharpening process compared to brazed designs.
What type of machine is this dowel drill compatible with?
This bit is designed for use on high-speed industrial boring units and CNC routers. The 10x27mm parallel shank with driving flat provides secure engagement in standard multi-spindle boring machine chucks and CNC tool holders. Right-hand rotation matches the standard spindle direction used in the majority of these machines.
What makes the bore quality on this bit different from a standard dowel drill?
The tip features 2 curved, negatively ground spurs that produce exceptionally clean bore walls with no rough edges. The centre-point balanced geometry ensures accurate hole placement, and the plunge edge running all the way to the centre of the bit reduces drilling resistance - resulting in cleaner, faster holes with less material stress around the bore opening.
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