8.00mm (.3150") DLC-Coated Diamond Flute Router, 25mm LOC, Fish Tail, Up-Cut, 8mm Shank | K021

Kyocera 8mm DLC-Coated Diamond-Flute Router | 25mm LOC | Fish Tail | Up-Cut | K021

The K021 Kyocera Series 2120 diamond-pattern carbide router features an 8.00mm (0.3150") cutting diameter, 25mm (0.9843") length of cut, 63mm overall length, and 8mm shank. Its DLC (Diamond-Like Carbon / Amorphous Diamond) coating provides a low-friction, wear-resistant surface for CNC machining of carbon fiber, fiberglass, G10, FR4, and other reinforced composite materials.

Combining diamond-flute cutting geometry, an up-cut configuration, and a fishtail tip, this solid carbide router is designed for profiling, trimming, slotting, and contour cutting in abrasive composite sheets and laminates.

Key Features

• 8.00mm cutting diameter: Suitable for composite panel trimming, contours, slots, and cutouts
• DLC / amorphous diamond coating: Provides low-friction cutting performance and resistance to wear in suitable materials
• Diamond-pattern flute geometry: Numerous small, intersecting cutting edges support controlled material removal in fiber-reinforced composites
• 25mm LOC: Extended cutting reach for suitable thicker composite panels and laminates
• Fish Tail tip: End-cutting geometry supports entry and through-routing in suitable sheet materials
• Up-cut design: Helps evacuate chips and cutting debris upward
• Submicron-grain carbide: Provides a rigid cutting-tool substrate
• 8mm shank: Fits compatible 8mm spindle collets and precision tool holders
• Kyocera Series 2120: Manufacturer part number 2120-3150D984F

DLC Coating for Composite Machining

DLC (Diamond-Like Carbon), also called amorphous diamond in Kyocera's tooling catalog, is a hard, low-friction coating applied to the carbide cutting surface. It can help reduce friction, material adhesion, and cutting-edge wear under appropriate machining conditions.

DLC coating is distinct from CVD diamond coating. K021 uses DLC-coated carbide, while CVD diamond-coated tools employ a crystalline diamond coating. Both are specialty cutting-tool finishes, but their wear characteristics and ideal applications differ.

The combination of DLC coating and diamond-pattern flute geometry makes K021 an option for cutting carbon-fiber reinforced polymer (CFRP), fiberglass, G10, FR4, and other abrasive composite laminates. Actual cutting performance and tool life depend on the workpiece, machine rigidity, spindle speed, feed rate, and tool engagement.

Diamond-Pattern Geometry & Fish Tail Tip

Diamond-flute routers feature numerous intersecting cutting edges rather than conventional continuous spiral flutes. This geometry is commonly used for routing abrasive, brittle, and layered materials.

The fishtail tip provides end-cutting capability for suitable entry and through-routing operations. The up-cut configuration helps move chips and routing debris upward during machining.

Use controlled entry conditions and secure workholding when machining layered composites. Appropriate cutting parameters help limit fiber breakout, chipping, and tool deflection.

25mm Cutting Length & 8mm Shank

K021 provides 25mm (0.9843") of cutting length and a 63mm (2.4803") overall length, offering substantial cutting reach for suitable thicker composite panels and reinforced laminates.

The tool uses an 8mm diameter shank and requires a matching 8mm precision collet or compatible tool holder. Select an appropriate cutting depth and avoid excessive side loading or unsupported tool engagement.

Typical Applications

• CNC routing and trimming of carbon-fiber reinforced polymer (CFRP)
• Carbon-fiber sheet, panels, and composite plate profiling
• Fiberglass-reinforced laminate machining
• G10 and FR4 fiberglass/epoxy composite routing
• Phenolic and reinforced plastic panel trimming
• Composite sheet cutouts, contours, and slotting
• Precision industrial CNC machining of abrasive laminates

Technical Specifications

Machining Recommendations

Use a rigid CNC machine, an accurately sized 8mm collet, secure workholding, and effective dust extraction. Select spindle speed, feed rate, entry method, and cutting depth for the material and DLC-coated router geometry.

General diamond-flute feed-and-speed charts are useful background references but are not verified coating-specific settings for K021. Use manufacturer-recommended parameters when available. Wear suitable respiratory protection and employ effective dust collection when machining fiberglass or carbon fiber.

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