0.0472" (1.20mm) × .275" LOC Diamond Flute PCB Router, Fish Tail, 1/8" Shank | R119

Kyocera 1.20mm Diamond-Flute PCB Router | .275" LOC | Fish Tail | Up-Cut

The R119 solid carbide diamond-flute router features a 0.0472" (1.20mm) cutting diameter, 0.275" (approximately 7.00mm) length of cut, and standard 1/8" (3.175mm) shank. Manufactured by Kyocera, this precision PCB router is designed for routing FR4/G10 circuit board laminates, fiberglass, phenolics, and other abrasive composite materials.

The diamond-pattern cutting geometry uses numerous small, intersecting cutting edges for controlled material removal. Combined with an up-cut configuration and fishtail tip, R119 is useful for PCB outlines, precision slots, profiling, and cutouts in suitable layered materials.

Key Features

• 0.0472" (1.20mm) cutting diameter: Precision cutting width for PCB profiles, slots, and detailed contours
• 0.275" LOC: Approximately 7.00mm of cutting reach for suitable PCB laminates and composite sheets
• Diamond-flute geometry: Fine, intersecting cutting edges help control fiber pull-out, fraying, and chipping under appropriate cutting conditions
• Fish tail tip: End-cutting geometry supports plunge entry and through-routing in suitable materials
• Up-cut configuration: Helps direct chips and routing debris upward during machining
• Solid tungsten carbide: Provides rigidity and resistance to abrasive wear
• 1/8" shank: Fits compatible precision CNC spindle collets and tool holders

Diamond-Flute Geometry & Fish Tail Tip

Diamond-flute routers, also called diamond-cut or diamond-pattern routers, feature numerous intersecting cutting edges rather than conventional continuous spiral flutes. This cross-cut geometry is commonly used in PCB fabrication and composite routing, where controlled material removal and limiting edge damage are important.

The fishtail tip features cutting edges at the tool end and permits plunge entry into suitable workpieces under appropriate machining conditions. During through-routing, this geometry can help limit backside breakout and edge damage, although results depend on material, workholding, tool condition, and cutting parameters.

The 0.275" cutting length provides approximately 7.00mm of cutting reach. Select a flute length appropriate for the material thickness and allow adequate clearance beneath the workpiece when through-cutting.

Important: Diamond-flute refers to the cutting-edge geometry. These are uncoated solid carbide tools, not diamond-coated or PCD routers.

Typical Applications

• PCB outlines, profiling, slots, and board cutouts
• FR4 and G10 fiberglass laminate routing
• Phenolic and epoxy laminate machining
• Fiberglass-reinforced composite trimming
• Carbon-fiber composites where uncoated carbide tooling is appropriate
• Precision CNC routing, prototyping, and small-part fabrication

Technical Specifications

Feeds & Speeds

Proper spindle speed, feed rate, depth of cut, and secure workholding are important when machining PCB laminates and abrasive composites with small-diameter carbide routers.

View Diamond-Flute Router Feed & Speed Chart for starting recommendations when routing FR4, G10, fiberglass, and other PCB laminate materials.

Recommended parameters are starting points only. Adjust for the material, machine rigidity, spindle capability, workholding, tool condition, and cutting depth. Test on scrap material and use appropriate dust extraction when machining fiberglass or carbon fiber.

Related Router Bits & Guides

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