RUKO FLS-DIN373-Kernloch-M14-MK2 upotuspora, HSS, morsekartio 2

This RUKO countersink bit stands out for its Morse Taper 2 shank, which provides a rigid, self-locking connection in machine spindles—ideal for production environments where tool changes must be quick and repeatable. Unlike straight-shank countersinks that rely on a chuck, the MK2 taper ensures concentricity and reduces runout, giving you clean, chatter-free counterbores for M14 cylindrical head screws.

Highlights

• Precision ground from HSS for long tool life and sharp cutting edges
• Three-flute design for smooth chip evacuation and reduced vibration
• DIN 373 geometry ensures correct counterbore dimensions for M14 screws
• Bright finish resists corrosion and keeps the tool visible in the tool crib

In daily use

Set the bit in your machine's Morse taper 2 socket, align the pilot with the pre-drilled core hole, and feed steadily. The 24 mm countersink diameter creates a flat-bottomed recess with a 180° face, while the 12.5 mm pilot guides the tool and prevents wandering. Suitable for steel, cast iron, non-ferrous metals, and plastics, this bit delivers consistent results in both manual and CNC operations.

Full specifications

• Tool type: Countersink / Counterbore
• Standard: DIN 373
• Material: HSS (High Speed Steel)
• Countersink diameter (D1): 24 mm
• Pilot diameter (D2): 12.5 mm
• Intended screw size: M14
• Shank type: Morse Taper 2 (MK2)
• Number of flutes: 3
• Overall length (L1): 160 mm
• Cutting length (L2): 40 mm
• Surface finish: Bright
• Cutting direction: Right-hand
• Head angle: 180°
• Tolerance: h8

Final note

For machinists who demand precision and durability, this RUKO countersink is a reliable choice for creating accurate counterbores in demanding materials.