Product Description
CMT 311.080.22 Dowel Drill Xtreme 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, this left-hand rotation dowel drill delivers consistently clean bores in hardwood, MDF, particle board, chipboard, plywood, veneered panels, and similar composite materials. With a 10x25mm parallel shank, 8mm cutting diameter, 35mm cutting height, and 70mm total length, it is sized for compatibility with multi-spindle CNC boring machines, CNC boring centers, and panel processing equipment requiring left-hand rotation tooling.
Key Features
- Solid super-micrograin carbide construction (HWM) - provides exceptional wear resistance and supports an almost infinite number of resharpenings, reducing long-term tooling costs compared to non-solid boring bits.
- Curved, negatively ground spurs (2 spurs, V2) - produce exceptionally clean bore walls with no rough edges or tearout, which is critical for visible furniture surfaces and dowel joint accuracy.
- Balanced centre point - ensures accurate bit entry and consistent bore positioning, reducing the risk of wandering or misaligned holes in production panel boring operations.
- Plunge edge running to the centre of the bit - reduces drilling resistance and increases production speed, allowing for higher throughput on high-speed boring units and CNC routers.
- Cylindrical head larger than traditional tips - is extremely resistant to prolonged use, maintaining bore quality over extended production runs without premature wear.
- 2 cutting edges (Z2) with 2 spiral flutes - balance chip evacuation efficiency and cutting stability, supporting clean, fast boring in both solid wood and engineered wood composites.
- Left-hand (LH) rotation - designed specifically for left-hand spindle positions on multi-spindle boring machines, ensuring correct cutting action and bore quality on machines requiring LH tooling.
- Parallel shank with driving flat (10x25mm) - provides secure tool retention in compatible boring machine chucks and adapters, preventing slippage during high-speed operation.
- Xtreme sharpening grade - delivers a precision cutting edge optimized for difficult composites such as particle board, MDF, and veneered wood where standard bits may underperform.
Why This Product
- Shops drilling dowel holes in hardwood, MDF, or veneered panels need a boring bit that produces a clean, flat-bottomed hole without tearout - the negatively ground curved spurs and balanced centre point on this bit address exactly that requirement.
- For production environments running left-hand spindle positions on multi-spindle CNC boring centers, a correctly specified LH rotation bit is not optional - this bit is purpose-built for that application.
- Solid carbide construction means the bit can be resharpened repeatedly rather than discarded, making it a cost-effective long-term investment for high-volume boring operations over disposable alternatives.
- The plunge edge extending to the centre of the bit actively reduces drilling resistance, which translates to faster cycle times and less strain on boring machine spindles during continuous production use.
Specifications
- Manufacturer Part Number: 311.080.22
- Brand: CMT Orange Tools
- Diameter: 5/16 in. (8mm)
- Cutting Height: 35mm
- Total Length: 70mm
- Shank: 10x25mm
- Rotation: Left-hand (LH)
- Number of Cutting Edges: 2 (Z2)
- Number of Flutes: 2
- Number of Spurs: 2 (V2)
- Blade Material: HWM solid super-micrograin carbide
- Sharpening Grade: Xtreme
Approved Applications
- Blind hole drilling for dowel connections in furniture and cabinet panels
- Panel boring in furniture manufacturing and cabinet making
- Drilling in hardwood and softwood
- Boring in particle board, chipboard, and MDF
- Drilling in veneered wood and coated panels
- High-speed boring unit production operations
- CNC router boring operations requiring left-hand rotation tooling
- Multi-spindle CNC boring machine applications
- Panel processing center applications
Frequently Asked Questions
Why does this boring bit use left-hand (LH) rotation, and how do I know if my machine requires it?
Multi-spindle boring machines typically have both right-hand and left-hand spindle positions. The LH rotation designation means this bit is designed to cut correctly when the spindle rotates counter-clockwise (as viewed from the shank end). Consult your boring machine documentation or spindle layout to confirm which positions require LH tooling before selecting bits.
What materials is this solid carbide dowel drill suitable for?
This bit is ideal for hardwood, softwood, particle board, MDF, veneered wood, and coated panels. The solid super-micrograin carbide construction and negatively ground curved spurs are specifically effective on difficult composites where clean bore walls and flat bottoms are required.
Can this bit be resharpened, and what does solid carbide construction mean for tool life?
Yes. Because the bit is constructed as a solid carbide unit rather than a carbide-tipped steel body, it supports an almost infinite number of resharpenings. Resharpening restores the cutting edge without compromising the structural integrity of the bit, making it well suited to high-volume production environments where tool longevity matters.
What shank size and type does this dowel drill use, and what machines accept it?
This bit uses a 10x25mm parallel shank with a driving flat, which is a standard configuration for multi-spindle CNC boring machines, CNC boring centers, and panel processing equipment. The driving flat and adjustable screw length ensure secure retention in compatible machine chucks and adapters during high-speed operation.
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