Kyocera VNBR 051102NB KW10 TWE07380 Micro Boring Bar - Micro Boring
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- Stock: In Stock
- Model: VNBR
- Weight: 0.08kg
- Manufactured: In Japan
- Ships: Worldwide
- Item Code: TWE07380
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Kyocera VNBR 051102NB KW10 Grade Uncoated Carbide, Micro Boring Bar
Product Overview
The Kyocera VNBR 051102NB KW10 Grade Uncoated Carbide Micro Boring Bar is a precision-engineered indexable insert designed for high-accuracy micro-boring operations on CNC turning centers. Manufactured by Kyocera in Japan, this VNB-NB-style insert features an VNBR0511-02NB ISO designation with optimized substrate and edge preparation for exceptional surface finish and dimensional stability in demanding production environments.
ISO Designation Breakdown
| ISO Designation Analysis | |
|---|---|
| ISO Code | VNBR0511-02NB |
| ANSI Code | VNBR051102NBKW10 |
| Shape (V) | 35° Rhombic (Diamond) insert with 5° clearance angle |
| Tolerance Class | M-class dimensional tolerance for precision boring |
| Fixing Hole / Chipbreaker | Standard hole with NB neutral back-rake |
| Size & Thickness | Size 05 / 0.156" (3.97mm) |
| Corner Radius | 0.008" (0.2mm) |
Engineering Dimensions & Geometry
| Dimensional Specifications | |
|---|---|
| Inscribed Circle (IC) | 0.195" |
| Insert Thickness (S) | 0.156" (3.97mm) |
| Corner Radius (RE) | 0.008" (0.2mm) |
| Nose Angle | 35° included angle (V-type) |
| Clearance Angle | 5° secondary clearance (B-type) |
| Minimum Bore Diameter | 0.1969" |
| Overall Length | Standard insert length per ISO 1832 |
| Hole Diameter | Standard central fixing hole |
Grade Details - Key Grade Characteristics
KW10 is a premium uncoated fine-grain carbide grade specifically developed by Kyocera for high-precision finishing and light machining operations. Key characteristics include:
- Substrate: Ultra-fine tungsten carbide (WC) grain structure (0.5-0.8 μm) with 12% cobalt binder for optimal hardness and toughness balance
- Hardness: HV 1,850 / HRA 92.5, ensuring excellent wear resistance at moderate cutting speeds
- Transverse Rupture Strength: 2,800 N/mm², providing adequate mechanical shock resistance for interrupted cuts
- Coating: Uncoated (bare substrate) to prevent built-up edge (BUE) on soft, ductile materials and maintain sharp cutting edges
- Edge Preparation: Precision-honed T-land edge with minimal land width to preserve sharpness while preventing chipping
- Color Code: White/silver (uncoated) for easy grade identification in tool cribs
Grade Comparison Matrix
| Grade | Coating | Application | Workpiece Material |
|---|---|---|---|
| KW10 | Uncoated | Micro boring, finishing | Aluminum, non-ferrous, plastics |
| KW20 | Uncoated | General turning | Mild steel, cast iron |
| PR930 | PVD coated | Semi-finishing to roughing | Steel, stainless steel |
| CA310 | CVD coated | Heavy roughing | Cast iron, hardened steel |
Chipbreaker Profile
NB (No Back-rake) chipbreaker design with neutral cutting geometry for stable machining and reduced vibration in micro-boring operations.
- Chipbreaker Width: Narrow land design optimized for feeds between 0.02-0.15 mm/rev
- Groove Depth: Shallow profile to maintain insert strength while promoting chip curl
- Rake Angle: Neutral (0°) for NB variant to minimize radial forces
- Chip Control: Ideal for short, manageable chip formation in blind-hole boring operations
- Edge Security: Micro-honed edge with 0.008" (0.2mm) corner radius for stable machining and reduced burr formation
Recommended Applications & Workpiece Materials
The VNBR 051102NB with KW10 grade excels in the following applications:
- Aluminum Alloys: 1xxx, 2xxx, 5xxx, 6xxx, 7xxx series – prevents built-up edge and delivers mirror finishes
- Copper & Brass: Excellent for electrical connector machining and precision bushing bores
- Plastics & Composites: Clean cutting action without material tearing or delamination
- Magnesium Alloys: Safe for dry machining with reduced ignition risk due to uncoated substrate
- Soft Steels: Low-carbon steels (< 0.25% C) for finish boring where surface quality is paramount
- Titanium Alloys (finish only): Ti-6Al-4V finishing operations at conservative parameters
Application Map by Operation
| Operation | Suitability | Notes |
|---|---|---|
| Micro Boring | ★★★★★ Excellent | Primary application; minimum bore 0.1969" |
| Finish Turning | ★★★★☆ Very Good | Light depths of cut, high precision |
| Profiling | ★★★☆☆ Good | Limited by 35° nose angle for complex contours |
| Grooving | ★☆☆☆☆ Poor | Not recommended; use dedicated grooving inserts |
| Threading | ★☆☆☆☆ Poor | Not recommended; use dedicated threading inserts |
Recommended Cutting Conditions
| Workpiece Material | Cutting Speed Vc (m/min) | Feed fn (mm/rev) | Depth of Cut ap (mm) |
|---|---|---|---|
| Aluminum Alloy | 200-400 | 0.05-0.20 | 0.10-1.00 |
| Copper / Brass | 150-300 | 0.05-0.15 | 0.10-0.80 |
| Low-Carbon Steel | 120-250 | 0.03-0.15 | 0.10-0.80 |
| Plastic / Composite | 100-250 | 0.05-0.20 | 0.10-1.50 |
| Titanium Alloy (finish) | 30-60 | 0.03-0.10 | 0.05-0.30 |
Note: Start at the lower end of the parameter range and increase gradually based on tool life and surface finish requirements. Use high-pressure coolant for chip evacuation in deep-hole boring.
Operating Guidelines
- Tool Overhang: Minimize overhang to reduce deflection; use damped boring bars for L/D ratios exceeding 4:1
- Coolant: Flood coolant recommended for aluminum and steel; air blast acceptable for some plastics and magnesium
- Insert Seat Condition: Ensure toolholder seat is clean and undamaged to maintain precise insert positioning
- Clamping Force: Torque clamping screw to manufacturer specification (typically 2.5-3.5 N·m) to prevent micro-vibration
- Edge Inspection: Visually inspect cutting edge before each shift; replace insert at first sign of flank wear exceeding 0.1 mm or chipping
- Runout: Maintain spindle runout below 0.005 mm (0.0002") for optimal bore geometry and surface finish
- Entry/Exit: Use reduced feed rate (50% of normal) when entering and exiting the bore to minimize burr formation
Toolholder Compatibility
The VNBR 051102NB insert is compatible with the following Kyocera toolholder families and industry-standard holders:
- Kyocera Series: SVNR, SVNSR, SSVNR (verify holder clearance for NB geometry) style boring bar holders
- Insert Size: Size 05 toolholders with 35° V-type pocket
- Clamping Method: Lever-lock or top-screw clamping (depending on holder design)
- Holder Material: Steel shank or carbide-reinforced bars for enhanced rigidity
- Coolant Through: Select holders with through-coolant capability for deep-hole applications
- Hand: Right-hand (RH) holders standard; left-hand (LH) available on request
Packaging & Ordering Information
| Ordering & Packaging Details | |
|---|---|
| Manufacturer Part Number | TWE07380 |
| Quantity per Package | 1 insert(s) |
| Packaging Type | Plastic protective case with foam insert |
| Individual Insert Weight | Approximately 0.08 kg |
| Country of Origin | Japan |
| Warranty | Full manufacturer warranty against material and manufacturing defects |
| Bulk Orders | Volume pricing available for quantities of 50+ inserts |
Catalog Meta Data
| Product Classification & Catalog Data | |
|---|---|
| Product Family | VNBR Series Micro Boring Inserts |
| Series Code | SWIQ |
| Style Code | VNB-NB |
| E-Commerce Category | Indexable Inserts > Turning Inserts > Boring Inserts |
| UNSPSC Code | 23151505 (Indexable inserts) |
| Harmonized Code | 8209.00 (Carbide indexable inserts) |
| ECCN | 1C999 (General purpose cutting tools) |
| RoHS Status | Compliant (lead-free substrate) |
| Last Catalog Update | 2026-Q2 |
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| Manufacturer | Kyocera Corporation |
|---|---|
| Status | Verified Original Product |
| Quality Assurance | Guaranteed Genuine Kyocera Components |
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Manufacturing and dispatch typically require 4–5 weeks. Once production begins, cancellations cannot be accommodated. -
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正確な製品情報
Following the Japanese philosophy of Monozukuri (物の作り), we strive to maintain exceptional technical accuracy throughout our product catalog.
- Confirm dimensions, geometry, coating, and grade using the official Kyocera item code.
- Technical datasheets are available upon request.
- For technical clarification contact sales.kyotow@gmail.com.
返品・キャンセルポリシー
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100% Accuracy Guarantee:
Full refund or replacement will be provided if the verified Kyocera item received differs from the official item code specified in your order confirmation. -
Order Finality:
Due to automated procurement systems connected directly to global factory distribution channels, orders cannot be modified or cancelled once processing has commenced. -
Technical Assistance:
Please verify machine compatibility, insert geometry, coating, and application grade before placing your order.
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