Product Description
CMT Dowel Drill with Countersink - 5/16" x 20 x 70mm, 10x33mm Shank, Right-Hand Rotation by CMT is a precision boring tool engineered for furniture manufacturing, cabinet production, and panel processing applications where drilling and countersinking must be accomplished in a single, clean pass. Built on a super-strength steel body with a tungsten carbide (HW) cutting head, this dowel drill combines a precision balanced centre point, 2 ground cutting edges, 2 negatively ground spurs, and 2 spiral flutes to produce flat-bottom bores with crisp, tear-out-free walls. The spiral portion carries a P.T.F.E. coating that resists pitch and adhesive buildup during high-volume panel work, and the parallel shank features a driving flat and a length adjusting screw for secure, repeatable positioning in multi-spindle boring machines, CNC boring centers, and panel processing equipment.
Key Features
- Carbide (HW) Cutting Head on Super-Strength Steel Body - the tungsten carbide tip delivers hardness and edge retention far beyond standard high-speed steel, meaning longer intervals between sharpenings and consistent bore quality across extended production runs in chipboard, MDF, hardwood, and coated panels.
- Precision Balanced Centre Point - keeps the drill from walking on entry, ensuring accurate hole placement with every cycle and reducing scrap in high-throughput panel operations.
- 2 Precision Ground Cutting Edges (Z2) and 2 Ground Spurs (V2) - the dual cutting edges and negatively ground spurs shear cleanly through panel surfaces before the core is removed, producing smooth bore walls and flat bottoms with no chipping or delamination - critical for visible joint faces and laminate-coated stock.
- Integrated Countersink - drills the pilot hole and recesses for bolt heads or panel connectors simultaneously, eliminating a second tool change and reducing cycle time in batch panel processing.
- P.T.F.E.-Coated Spiral Flutes - the non-stick orange or black P.T.F.E. coating prevents resin, pitch, and glue from bonding to the flutes, keeping chip evacuation efficient and extending overall tool service life without additional maintenance steps.
- Parallel Shank with Driving Flat and Length Adjusting Screw (10x33mm) - the driving flat prevents shank rotation under load, while the adjusting screw allows fine depth-setting so the countersink recess depth stays consistent across every spindle in a multi-spindle boring head.
- Right-Hand (RH) Rotation - matches the standard spindle direction of the overwhelming majority of CNC boring centers and multi-spindle panel processing machines, making installation straightforward and setup time minimal.
- 5/16" Cutting Diameter, 20mm Cutting Height, 70mm Overall Length - the 70mm body length provides the clearance needed for thicker panel stock and deeper connector recesses that shorter standard-series dowel drills cannot reach.
Why This Product
- Combining drilling and countersinking into one pass - enabled by the integrated countersink geometry - cuts cycle time and eliminates secondary tool changes on multi-spindle CNC boring lines and boring centers handling high panel volumes.
- The negatively ground spurs and precision balanced centre point work together to deliver clean entry and exit surfaces in chipboard, MDF, HDF, plywood, hardwood, softwood, laminates, and coated panels, reducing rework caused by surface tearout on visible joint faces.
- The P.T.F.E. spiral coating and carbide (HW) cutting head extend service intervals in demanding production environments where adhesive-coated or resin-rich materials would quickly degrade uncoated tools.
- The 10x33mm parallel shank with driving flat and length adjusting screw provides the secure, adjustable seating that multi-spindle boring machines require, making this bit a direct-fit replacement for standard dowel boring heads without adapter modifications.
Specifications
- Manufacturer Part Number: 377.082.11
- Brand: CMT Orange Tools
- Diameter: 5/16"
- Cutting Height: 20mm
- Total Length: 70mm
- Shank: 10x33mm
- Rotation: Right-Hand (RH)
- Number of Cutting Edges: 2 (Z2)
- Number of Spurs: 2 (V2)
- Spur Sharpening: Negatively ground spurs
- Material: HW (Tungsten Carbide) on super-strength steel body
- Coating: P.T.F.E. on spiral portion
Approved Applications
- Drilling and countersinking in a single pass on panel stock
- Bolt head and connector recessing in thicker panel materials
- Dowel hole boring on multi-spindle CNC boring machines
- Panel processing on CNC boring centers and panel processing centers
- Boring machine operations with adapter or chuck
Frequently Asked Questions
What materials can this dowel drill be used on?
The carbide (HW) cutting head and negatively ground spurs make this bit suitable for chipboard, MDF, HDF, hardwood, softwood, plywood, laminates, and coated panels - covering the full range of materials found in furniture and cabinet panel processing.
What machines is this dowel drill compatible with?
This bit is designed for use in multi-spindle CNC boring machines, CNC boring centers, panel processing centers, and boring machines fitted with an adapter or chuck. The 10x33mm parallel shank with driving flat ensures a secure, non-rotating fit in standard boring heads.
What does the P.T.F.E. coating on the spiral do?
The P.T.F.E. coating on the spiral flutes creates a non-stick surface that prevents resin, pitch, and adhesive from bonding to the tool during cutting. This keeps chip evacuation efficient, reduces heat buildup, and extends the service life of the bit in high-production environments where coated or adhesive-rich panels are common.
How does the integrated countersink differ from a standard dowel drill?
Unlike a plain dowel drill that creates only a cylindrical bore, this bit also machines a countersunk recess at the opening of the hole in the same pass. This recess accommodates bolt heads and panel connectors flush with or below the panel surface, eliminating the need for a separate countersinking step and reducing total cycle time per hole.
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