0.0315" (1/32", 0.80mm) × .197" LOC Diamond Flute PCB Router, Drill Point, 1/8" Shank | R105D

Kyocera 1/32" (0.80mm) Diamond-Flute PCB Router – Drill Point – Up-Cut

The R105D solid carbide diamond-flute router features a 0.0315" (0.80mm, nominal 1/32") cutting diameter, 0.197" (5.00mm) length of cut, and a standard 1/8" shank. Manufactured by Kyocera, this precision cutting tool is designed for PCB routing, FR4/G10 fiberglass laminates, phenolic materials, and other abrasive composites.

Kyocera's Series 4100 cross-cut/updraft geometry combines multiple intersecting cutting edges with a drill-point tip. The diamond-pattern cutting action is particularly useful for routing layered and fiberglass-reinforced materials where controlled cutting and reduced edge damage are important.

Key Features

• 0.0315" (0.80mm) cutting diameter: Nominal 1/32" size for fine PCB slots, profiles, and cutouts
• 0.197" (5.00mm) flute length: Suitable for routing materials within the usable cutting length
• Diamond-flute cutting geometry: Fine, intersecting cutting edges for controlled routing in abrasive laminates
• Drill-point tip: Supports direct plunge entry into suitable materials under appropriate cutting conditions
• Up-cut / updraft configuration: Designed to promote upward chip and debris evacuation during routing
• Solid tungsten carbide: Provides rigidity and resistance to abrasive wear
• 1/8" shank: Compatible with precision CNC spindles and properly sized tool holders

Diamond-Flute Geometry & Drill-Point Tip

Unlike conventional spiral-flute end mills, diamond-flute routers use numerous small, intersecting cutting edges. This cross-cut pattern helps control fiber pull-out, chipping, and delamination when machining FR4, G10, fiberglass, and other reinforced materials under suitable cutting conditions.

The drill-point tip facilitates plunge entry for internal cutouts, slots, and other operations where starting inside the workpiece may be necessary. Compared with fishtail tips, drill-point geometry may be preferable when direct plunging is an important part of the machining operation.

Important: Diamond-flute refers to the cutting geometry. This router is uncoated solid carbide, not a diamond-coated or PCD tool.

Typical Applications

• PCB board outlines, slots, and internal cutouts
• FR4 and G10 fiberglass laminate routing
• Phenolic and epoxy laminate machining
• Fiberglass-reinforced plastic and composite trimming
• Carbon fiber composites where uncoated carbide tooling is appropriate
• Small CNC precision profiling and prototype fabrication

Technical Specifications

Feeds & Speeds

Proper spindle speed, feed rate, cutting depth, and secure workholding are especially important when routing with small-diameter carbide tools.

View Our Carbide Router Feed & Speed Charts for general starting recommendations, including the dedicated diamond-flute router chart for PCB, FR4, G10, and fiberglass materials.

Use recommended cutting parameters as starting points only. Verify settings for your material, machine, and tooling. Avoid excessive side loads and use suitable dust extraction when cutting fiberglass and carbon-fiber composites.

Related Diamond-Flute Routers & Guides

Need a different diameter or cutting length? Browse our Diamond-Flute PCB Router Bits Collection.

To compare cutting geometry and plunge-tip styles, visit our Diamond-Flute Router Guide.

For demanding production work in highly abrasive carbon fiber and reinforced composites, consider our PCD & CVD Diamond-Coated Router Bits for improved wear resistance.