CMT 315.220.12 Countersink for 2 Flute Drills by CMT is a left-hand rotation countersink designed for use with 2-flute dowel drills, delivering precise countersinking at a 45 deg. cutting angle in a single machining pass. With a 22mm diameter and a bore diameter range of 11mm - 12mm, this carbide-tipped tool is engineered for high-volume panel processing and multi-spindle boring operations on solid wood, chipboard, MDF, laminates, and coated panels. Its compact 15mm total length makes it well suited for tight spindle configurations in CNC boring centers and panel processing equipment.

Key Features

• 45 deg. cutting angle - produces clean, consistent countersink geometry that ensures flush or recessed fastener seating without secondary hand finishing.
• Left-hand (LH) rotation - engineered specifically for left-hand spindle configurations common in multi-spindle CNC boring machines, so the tool cuts correctly without modification.
• 22mm diameter with 11mm - 12mm bore compatibility - accommodates the bore diameter range found on standard 2-flute dowel drills, allowing the countersink to seat accurately on the drill body for a reliable, repeatable fit.
• 2-tooth cutting geometry - dual cutting edges distribute load evenly across the workpiece surface, reducing vibration and producing smoother countersink walls in chipboard, MDF, HDF, hardwood, softwood, plywood, and laminates.
• Hard metal (HW) carbide material - delivers exceptional wear resistance and extended service life even in abrasive composite panels and coated sheet goods, reducing downtime from frequent tool changes.
• 15mm total length - compact profile fits within tight spindle head assemblies on boring centers and panel processing centers without clearance issues.

Why This Product

• Designed specifically for left-hand spindle positions, this countersink eliminates the need for workarounds or adapter solutions when equipping LH bores on multi-spindle CNC boring machines and panel processing centers.
• The 45 deg. countersink angle combined with 2-flute cutting geometry means operators get clean, tear-out-free results in demanding materials like laminates and coated panels - without slowing down cycle times.
• Hard metal carbide construction means the tool holds its edge through extended production runs in abrasive engineered wood products such as chipboard and MDF, making it a durable choice for high-throughput shops.
• The bore diameter range of 11mm - 12mm gives this countersink compatibility with a variety of standard 2-flute dowel drill shanks, reducing the need to stock multiple countersink sizes for different drill configurations.

Specifications

• Manufacturer Part Number: 315.220.12
• Brand: CMT Orange Tools
• Cutting Angle: 45 deg.
• Diameter: 22mm
• Bore Diameter: 11mm - 12mm
• Total Length: 15mm
• Rotation: Left-hand (LH)
• Number of Teeth: 2
• Blade Material: Hard Metal (HW)

Approved Applications

• Multi-spindle CNC boring machines
• CNC boring centers
• Panel processing centers
• Boring machines with adapter or chuck
• Chipboard and particleboard panel processing
• MDF and HDF panel countersinking
• Hardwood and softwood countersinking
• Plywood, laminates, and coated panel fabrication