CMT 378.102.11 Dowel Drill with Countersink for Through Holes is a precision-engineered, carbide-tipped boring tool designed to drill, countersink, and penetrate completely through a panel in a single pass. Built with a 10mm cutting diameter and a right-hand rotation, this through-hole dowel drill is engineered for use on multi-spindle CNC boring machines, boring centers, and panel processing equipment where clean, repeatable hole quality is essential in high-production environments.

Key Features

• Hardmetal (HW) Carbide Construction - tungsten carbide provides exceptional edge retention and wear resistance, reducing tool change frequency and maintaining consistent cut quality over extended production runs.
• Through-Hole Countersink Geometry (60 deg. sharpening) - the integrated countersink profile drills and countersinks in one operation, eliminating a secondary machining step and saving cycle time on panel boring lines.
• 2-Flute, 2-Spur Design - dual spurs score the panel surface before the flutes clear material, producing clean bore walls and crisp entry points with minimal tearout on coated, laminated, and wood-based panels.
• 35mm Cutting Height with 26.5mm Inner Cutting Height - the extended cutting zone accommodates a range of panel thicknesses, making the bit versatile across chipboard, MDF, plywood, and hardwood workpieces.
• Right-Hand (RH) Rotation - matches the standard spindle direction of the vast majority of CNC boring machines and boring centers, allowing direct installation without adapter modification.
• 10x20mm Shank with 25/64" Compatibility - the precision-ground shank seats securely in standard boring machine chucks and adapters, minimizing runout and ensuring hole-to-hole positional accuracy across multi-spindle setups.
• 70mm Total Length - the compact overall length keeps the tool stable at high boring speeds while still providing sufficient reach for through-panel penetration applications.

Why This Product

• Designed specifically for through-hole dowel boring with an integrated countersink, this bit replaces two separate tooling operations with one, reducing machine programming complexity and improving throughput on panel processing lines.
• The hardmetal (HW) carbide tip handles abrasive engineered wood products - including chipboard, MDF, HDF, and coated panels - without the rapid edge degradation common with high-speed steel alternatives.
• With a 2-spur geometry that pre-scores the workpiece surface, this bit delivers clean, splinter-free entry holes on laminates and coated panels where surface finish quality directly affects finished product appearance.
• The 10mm diameter is one of the most common dowel-hole sizes in furniture and cabinet panel production, making this bit a direct fit for standard dowel joining systems on CNC boring centers and multi-spindle machines.

Specifications

• Manufacturer Part Number: 378.102.11
• Brand: CMT Orange Tools
• Diameter: 10mm
• Cutting Height: 35mm
• Inner Cutting Height: 26.5mm
• Total Length: 70mm
• Shank: 10x20mm
• Shank Size (Secondary): 25/64" x 25
• Number of Spurs: 2
• Number of Teeth: 2
• Tooth Geometry: Through holes 60
• Rotation: Right-hand (RH)
• Blade Material: Hardmetal (HW)

Approved Applications

• Multi-Spindle CNC Boring Machine
• CNC Boring Center
• Panel Processing Center
• Boring Machine with Adapter or Chuck
• Chipboard and Particleboard
• MDF and HDF
• Hardwood and Softwood
• Plywood
• Laminates and Coated Panels