0.0315" (0.80mm, Approx. 1/32") x .197" LOC 2-Flute Extended Flute Square End Carbide End Mill, 1/8" Shank | M108

0.80mm (.0315", Approx. 1/32") Extended Flute Carbide End Mill – M108

This special-made Kyocera solid carbide end mill features a precision 0.80mm (.0315") cutting diameter, an extended .197" (5.00mm) length of cut, 2-flute square end geometry, 1.50" overall length, and a standard 1/8" shank. It is designed for precision CNC milling, narrow slotting, profiling, and detailed machining where additional flute length is required.

Size note: The nominal cutting diameter is 0.80mm (.0315"), approximately 1/32". A true 1/32" diameter is .03125", so this tool is slightly larger. For precision slots or features, use the nominal .0315" diameter when selecting tooling.

The .197" extended flute length provides additional cutting reach compared with shorter 0.80mm end mills. This makes M108 useful for narrow slots, deeper profiles, and features requiring extra cutting depth. Because longer cutting sections are more susceptible to deflection, appropriate cutting parameters and controlled tool engagement are especially important.

The 2-flute up-cut geometry helps evacuate chips during machining. Solid carbide construction provides rigidity and wear resistance, while the square end geometry is suitable for slots, pockets, profiles, contours, and flat-bottom features.

This end mill can be used for precision machining in plastics, acrylic, wood, fiberglass, composites, and selected soft non-ferrous metals such as aluminum and brass when appropriate feeds, speeds, workholding, and spindle runout control are maintained.

Common Applications

• Precision CNC milling and fine-detail machining
• Deeper narrow-slot cutting
• Extended-reach profiling and contouring
• Small pocketing and flat-bottom features
• PCB milling and circuit board machining
• Plastic and acrylic machining
• Fine engraving and detailed cutting
• Wood and miniature model-making applications
• Fiberglass and composites with suitable cutting parameters
• Selected soft non-ferrous metals under controlled machining conditions

Features & Benefits

• Special-made Kyocera design: Extended flute configuration for precision applications requiring additional cutting reach.
• 0.80mm (.0315") diameter: Suitable for narrow features and precision CNC detail work.
• Approximately 1/32" size: Useful for customers comparing tools near this common fractional diameter.
• .197" (5.00mm) flute length: Provides additional reach compared with shorter-flute 0.80mm end mills.
• 2-flute geometry: Provides cutting edges with space for chip evacuation.
• Up-cut flutes: Help move chips away from the cutting area.
• Square end: Suitable for slots, pockets, profiles, and flat-bottom cuts.
• Solid carbide construction: Provides rigidity and wear resistance for precision machining.
• 1/8" shank: Compatible with appropriate precision CNC toolholders and collets.

Specifications

Extended Flute vs. Standard Flute

M108 provides a .197" length of cut, compared with the .157" LOC of M107. Both share the same nominal 0.80mm cutting diameter, but M108 offers additional flute length when deeper machining is required.

For shallow cuts, a shorter-flute tool may provide better rigidity and reduced deflection. Choose the shortest cutting length that accommodates the required machining depth.

Additional Specialty Applications

This extended-flute carbide end mill may also be useful for instrument makers, luthiers, model makers, jewelry work, and other precision applications requiring narrow CNC cuts with additional cutting reach. Always verify the required slot width, cutting depth, material suitability, machine rigidity, and tool runout before machining.

See our CNC Fret Slotting End Mills Collection for additional options.

Important Machining Considerations

At just 0.80mm diameter, this extended-flute end mill requires careful machining. Use rigid workholding, precision toolholding, minimal spindle runout, appropriate spindle speeds, conservative cutting depths, and carefully selected feed rates. The longer .197" cutting section requires particular attention to cutting forces and tool deflection. Excessive loading may cause premature breakage.