Kyocera TWFGL180 KW10 Grade Uncoated Carbide, Micro Face Grooving Bar

Product Overview

The Kyocera TWFGL180 is a precision-engineered uncoated carbide micro face grooving bar designed for ultra-fine diameter face grooving operations. Manufactured in Japan to exacting ISO standards, this KW10-grade tool enables precise groove generation on components with minimum groove diameters starting from 6.00 mm.

Engineered as a left-hand configuration within the TWFG series, the TWFGL180 features twin-bar horizontal construction optimized for non-ferrous metal machining. The KW10 uncoated carbide substrate delivers mirror-finish surface quality and exceptional edge stability in micro-machining applications where conventional tooling cannot achieve required precision levels.

ISO Designation Breakdown

Engineering Dimensions & Geometry

Grade Details — Key Grade Characteristics

KW10 Grade Characteristics

The KW10 grade is a premium uncoated fine-grain tungsten carbide specifically developed by Kyocera for machining non-ferrous metals, cast iron, and titanium alloys. This grade combines high hardness with exceptional edge stability.

• Substrate: Ultra-fine grain tungsten carbide (WC) with cobalt binder optimized for micro face grooving applications
• Hardness: 92.0 HRA (approx. 1600 HV30) — provides excellent wear resistance at elevated cutting temperatures
• Transverse Rupture Strength: ≥2,600 MPa — resists chipping in interrupted cuts
• Grain Size: Sub-micron (0.5–0.8 μm) — ensures sharp cutting edges and superior surface finish
• Coating: Uncoated — ideal for materials where coating adhesion is problematic (aluminum, copper, titanium)
• ISO Application Group: K10-K20 (cast iron, non-ferrous metals, non-metals, titanium alloys)
• Color Code: Natural carbide gray (uncoated) for easy grade identification

Key Performance Advantage: The absence of coating eliminates built-up edge (BUE) formation on aluminum and copper alloys, delivering mirror-finish surfaces without edge degradation. The fine-grain structure maintains edge sharpness even at low cutting speeds common in small-parts and micro-machining operations.

Grade Comparison Matrix

Note: KW10 is the optimal choice for uncoated applications requiring maximum surface finish and minimal built-up edge. For ferrous materials, consider PR905 or PR930 coated grades.

Chipbreaker Profile

Chipbreaker Profile Analysis

The twin-bar horizontal configuration naturally directs chips radially outward from the groove, eliminating the need for a conventional chipbreaker groove. The sharp, uncoated cutting edge produces fine, manageable chips in non-ferrous materials.

• Chipbreaker Code: N/A (Natural Edge)
• Chip Control: Optimized for fine chip generation in micro-machining
• Feed Range: 0.02–0.15 mm/rev
• Depth of Cut: 0.1–2.0 mm
• Chip Form: Fine spiral / short arc chips

Recommended Applications & Workpiece Materials

Recommended Applications & Workpiece Materials

The TWFGL180 KW10 is specifically engineered for the following material groups and application scenarios:

• Aluminum Alloys (1xxx–6xxx series): Excellent — ideal for micro-diameter face grooves on small electronic and medical components
• Copper & Copper Alloys: Excellent — produces mirror-finish groove floors and walls without built-up edge
• Brass & Bronze: Excellent — high-precision grooving with minimal burr formation
• Plastics & Engineering Polymers: Very Good — clean groove generation without material deformation
• Cast Iron (Small Components): Good — suitable for micro-grooves in cast iron fittings and valves
• Titanium (Medical Grade): Good — capable of micro-grooving on titanium implants and instruments

Material Compatibility Note: This uncoated grade is NOT recommended for unhardened steels (>0.3% C) or stainless steels where crater wear and built-up edge will rapidly degrade tool life. For ferrous materials, select a PVD-coated grade such as PR905 or PR930.

Application Map by Operation

Recommended Cutting Conditions

Micro-Machining Note: Due to the small cutter width (0.0709 mm), use conservative feeds and high spindle speeds to maintain chip thickness. Rigid toolholder setup and minimal overhang are critical for vibration-free micro-grooving.

Operating Guidelines

Operating Guidelines & Best Practices

• Toolholder Selection: Use only Kyocera-approved toolholders with matching insert pocket geometry. Incorrect holder selection will result in poor chip control and premature insert failure.
• Insert Seating: Ensure the insert seats fully in the pocket without rocking. Clean the pocket and seating surface before every insert change. Torque clamping screws to manufacturer specifications.
• Run-In Procedure: For new installations, run at 70% of recommended cutting speed for the first 5 minutes to allow the cutting edge to stabilize and micro-polish.
• Chip Evacuation: Direct coolant nozzles to flush chips out of the groove immediately. Chip recutting is the primary cause of poor surface finish and edge chipping.
• Vibration Control: Minimize tool overhang. Use the shortest possible toolholder and ensure workpiece rigidity. Vibration will destroy cutting edge integrity in micro-grooving and small-parts operations.
• Edge Inspection: Inspect the cutting edge under magnification (10× minimum) after each machining cycle. Replace the insert when flank wear exceeds 0.15 mm or when chipping is visible.
• Speed/Feed Adjustment: If built-up edge (BUE) forms on aluminum or copper, increase cutting speed by 20% or switch to high-pressure coolant delivery.
• Depth Limitations: Do not exceed recommended maximum groove depths. Deep grooves require multiple passes with incremental depth increases of 0.5–1.0 mm per pass.
• Micro-Machining Protocol: Use high-frequency spindle speeds (>10,000 RPM) to maintain adequate surface speed on small diameters. Verify concentricity of the toolholder assembly to within 0.005 mm TIR.

Toolholder Compatibility

Toolholder Compatibility & Mounting

The TWFGL180 is designed for use with Kyocera STWL and S-STWL sleeve systems for micro face grooving. Key compatibility requirements:

• Holder Series: STWL (standard), S-STWL (short-reach variant)
• Sleeve Compatibility: Minimum face groove diameter 6.00 mm; verify sleeve bore matches bar diameter
• Clamping: Precision collet or hydraulic sleeve clamping
• Coolant Delivery: External coolant nozzles directed at cutting point; through-sleeve coolant optional
• Holder Overhang: Maximum 4× bar diameter to prevent vibration
• Spindle Requirements: Minimum 8,000 RPM recommended for micro-diameter face grooving

Mounting Verification: Before first use, verify that the insert sits flush in the pocket with no visible gaps. Use a dial indicator to check cutting edge height relative to the toolholder reference surface. Edge height should be within ±0.02 mm of centerline for optimal performance.

Packaging & Ordering Information

Packaging & Ordering Information

• Standard Packaging: Individual insert in protective plastic blister pack; 10 inserts per sealed plastic container
• Labeling: Each container includes ISO designation, grade, batch number, and manufacturing date code
• Minimum Order Quantity: 1 insert (bulk pricing available for quantities ≥50)
• Stock Availability: Standard stock item; typically ships within 24 hours of order confirmation
• Storage Recommendation: Store in original packaging at 15–25°C in a dry environment; avoid exposure to corrosive atmospheres
• Country of Origin: Japan (manufactured at Kyocera Precision Tools facility)
• Certification: ISO 9001:2015 quality management; inserts traceable to production batch
• Warranty: Full manufacturer warranty against material and manufacturing defects

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