Kyocera DNGA150404MEF KBN475 TFB02301D
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- Stock: In Stock
- Model: KBN475
- Weight: 0.10kg
- Manufactured: In Japan
- Ships: Worldwide
- Item Code: TFB02301D
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1. Product Overview
The Kyocera DNGA150404MEF KBN475 TFB02301D is a precision indexable turning insert engineered by Kyocera in Japan for CNC lathe production. Built around a Rhombic 55° geometry with a 55° corner angle, 15.5 mm cutting edge length and 12.7 mm inscribed circle, 4.76 mm thickness and a 0.4 mm nose radius, the DNGA150404MEF is designed for profiling & copy turning; access to shoulders and complex contours. The 0° (negative) clearance keeps cutting forces controlled while the G-class tolerance (precision ground; tight i.c. tolerance) guarantees repeatable indexing accuracy.
Grade KBN475 is a Kyocera CBN grade featuring Uncoated CBN (cast iron spec.). It reaches HV 4,000 surface hardness with a transverse rupture strength of 1,250 MPa, and remains oxidation-stable up to 1,300°C. Within its K05–K20 / H15–H25 ISO application window it is engineered for high-speed cast iron finishing & hardened steel. Primary workpiece groups: Gray Cast Iron, Hardened Steel.
Chip control comes from the MEF chipbreaker — . Its working window covers the application zone with cutting force, and paired with the r = 0.4 mm nose radius it produces controlled, evacuable chips from fn ≈ 0.1 up to 0.4 mm/rev.
In a typical setup on S45C carbon steel, run the DNGA150404MEF at Vc 560–804 m/min, feed fn 0.07–0.15 mm/rev and depth of cut ap 0.2–0.7 mm, achieving theoretical surface finishes down to Ra 1.4 µm at the lower feed bound. Every insert is 100% dimensionally and edge-inspected under Kyocera's ISO 9001:2015 system and ships in lot-coded packaging with full batch traceability.
2. Engineering Quick Reference
| Parameter | Specification |
|---|---|
| Full Product Name | Kyocera DNGA150404MEF KBN475 TFB02301D |
| ISO Ordering Code | DNGA150404MEF |
| Grade | KBN475 |
| Insert Shape | Rhombic 55° (55°) |
| Cutting Edge Length | 15.5 mm |
| Inscribed Circle | 12.7 mm |
| Thickness | 4.76 mm |
| Nose Radius | 0.4 mm |
| Chipbreaker | MEF |
3. ISO 1832 Designation — Complete Breakdown
| ISO 1832 Position | Code | Decoded Meaning |
|---|---|---|
| Position 1 — Insert Shape | D | Rhombic 55° (55° corner) |
| Position 2 — Clearance Angle | N | 0° (negative) |
| Position 3 — Tolerance Class | G | Precision ground; tight I.C. tolerance — I.C. ±0.025, thickness ±0.13 |
| Position 4 — Fixing / Hole | A | With cylindrical hole — screw/pin mounting |
| Position 5 — Edge Length Code | 15 | 15.5 mm (I.C. 12.7 mm) |
| Position 6 — Thickness Code | 04 | 4.76 mm |
| Position 7 — Nose Radius Code | 04 | 0.4 mm |
| Suffix — Chipbreaker | MEF | Application-specific geometry |
4. Insert Geometry & Engineering Dimensions
| Parameter | Specification |
|---|---|
| Insert Shape | Rhombic 55° (55°) |
| Cutting Edge Length | 15.5 mm |
| Inscribed Circle (I.C.) | 12.7 mm |
| Insert Thickness | 4.76 mm |
| Nose Radius | 0.4 mm |
| Clearance Angle | 0° (negative) |
| Usable Cutting Edges | 2 per face |
| Edge Strength Rating | Good |
| Fixing | With cylindrical hole — screw/pin mounting |
| Geometry Tolerance | I.C. ±0.025, thickness ±0.13 |
5. Grade Technology — Substrate & Coating
| Parameter | Specification |
|---|---|
| Grade Designation | KBN475 |
| Grade Family | CBN |
| Coating System | Uncoated CBN (cast iron spec.) |
| Surface Hardness | HV 4,000 |
| Transverse Rupture Strength | 1,250 MPa |
| Oxidation / Heat Resistance | 1,300°C |
| ISO Application Range | K05–K20 / H15–H25 |
| Primary Materials | Gray Cast Iron, Hardened Steel |
Primary application: High-speed cast iron finishing & hardened steel.
6. Grade Application Range by ISO Material Group
| ISO Group | Suitability | Note |
|---|---|---|
| P – Steel | Not Recommended | Outside grade application window |
| M – Stainless Steel | Not Recommended | Outside grade application window |
| K – Cast Iron | Excellent | First-choice application group |
| N – Non-Ferrous | Not Recommended | Outside grade application window |
| S – HRSA / Titanium | Not Recommended | Outside grade application window |
| H – Hardened Steel | Very Good | Fully supported application group |
7. Chipbreaker Geometry & Working Window
MEF geometry: Molded 3D chipbreaker optimized for stable chip curling and evacuation across the general feed range.
| Application Zone | Feed fn (mm/rev) | Depth of Cut ap (mm) |
|---|---|---|
| Finishing | 0.05–0.15 | 0.10–0.4 |
| Medium cutting | 0.1–0.24 | 0.4–1.2 |
| Roughing | 0.24–0.4 | 1.2–2.4 |
8. Recommended Workpiece Materials
Optimized for: Gray Cast Iron, Hardened Steel. Typical hardness window HB 150–300 for steels; see the cutting-condition tables for per-material parameters.
9. Application Capability Map
| Operation | Rating | Notes |
|---|---|---|
| External Turning (longitudinal) | Excellent | Primary operation |
| Facing | Excellent | Full facing capability |
| Profiling / Copy Turning | Very Good | Rhombic 55° corner access |
| Interrupted Cut | Fair | Reduce feed 20–30% |
| Internal Boring (matching bar) | Good | Positive geometry preferred |
10. Recommended Cutting Conditions — by Workpiece Material
| Workpiece Material | Vc (m/min) | fn (mm/rev) | ap (mm) | Coolant |
|---|---|---|---|---|
| Gray Cast Iron (FC250/GG25) | 560–804 | 0.07–0.15 | 0.2–0.7 | Dry / MQL |
| Nodular Cast Iron (FCD450) | 560–804 | 0.07–0.15 | 0.2–0.7 | Dry / MQL |
| Hardened Steel (HRC 55–62) | 120–172 | 0.06–0.12 | 0.1–0.4 | Dry / MQL |
11. Cutting Conditions — by Operation Type
| Operation | Vc factor | Feed fn (mm/rev) | DoC ap (mm) | Expected Surface Ra (µm) |
|---|---|---|---|---|
| Finishing | × 1.15 of table value | 0.05–0.14 | 0.05–0.3 | 0.8–6.1 |
| Medium | × 1.00 | 0.14–0.28 | 0.3–1 | 6.1–24.5 |
| Roughing | × 0.80–0.90 | 0.28–0.44 | 1–2 | 24.5–60.5 |
Programming note: Values assume a rigid setup with tool overhang ≤ 4× shank diameter and continuous cut. For interrupted cuts reduce feed 20–30% and Vc 10%.
12. Surface Finish vs Feed (Theoretical Ra)
| Feed fn (mm/rev) | Theoretical Ra with r=0.4 mm (µm) | Typical Operation |
|---|---|---|
| 0.05 | 0.8 | Finishing |
| 0.08 | 2.0 | Medium |
| 0.10 | 3.1 | Medium |
| 0.15 | 7.0 | Roughing |
| 0.20 | 12.5 | Roughing |
| 0.25 | 19.5 | Roughing |
| 0.30 | 28.1 | Roughing |
| 0.40 | 50.0 | Roughing |
Formula: Ra ≈ fn² / (8 × r). With the r = 0.4 mm nose radius of this insert, feeds up to 0.05 mm/rev stay in finishing territory (Ra ≤ 1.6 µm). Wiper-chipbreaker inserts allow roughly double these feeds at equal finish.
13. Edge Preparation & Wear Limits
| Wear Criterion | Limit | Action |
|---|---|---|
| Flank wear VB | 0.30 mm (finishing) / 0.50 mm (roughing) | Index to fresh corner |
| Crater depth KT | 0.10 mm | Reduce Vc 10–15% or improve coolant |
| Notch wear at DoC line | Visible notch | Vary DoC between passes; reduce Vc |
| Built-up edge | Any BUE on rake | Increase Vc; check coolant concentration |
| Chipping / plastic deformation | Edge micro-fracture or deformed nose | Reduce feed/Vc; verify rigidity; tougher grade |
14. Compatible Toolholders
ISO holders for 55° rhombic inserts. Always match the insert seat size to the holder designation.
| Compatible Holder Family | Seat Size | Mounting |
|---|---|---|
| MDJNR/L | Seat size 15 | External / Internal |
| PDJNR/L | Seat size 15 | External / Internal |
| DDJNR/L | Seat size 15 | External / Internal |
| SDJCR/L (positive boring) | Seat size 15 | External / Internal |
15. Operating & Handling Guidelines
- Clean the holder seat thoroughly before mounting; any chip or burr under the insert causes edge breakage
- Tighten the clamping screw to 2.0–4.0 Nm (size-dependent) with a torque wrench — never over-tighten
- Check insert seating runout ≤ 0.02 mm TIR before the first cut
- Run-in new edges at 80% Vc for the first 2–3 minutes of cut
- Index at the wear limits — do not run to catastrophic failure
- Apply coolant continuously; on/off coolant cycling causes thermal cracks
16. Quality Assurance & Manufacturing
| Quality Attribute | Specification |
|---|---|
| Manufacturing Standard | ISO 9001:2015 certified Kyocera production, Japan |
| Dimensional Inspection | 100% inspection with CMM-class tolerance control |
| Edge Inspection | Microscopic cutting-edge inspection on every piece |
| Traceability | Laser-marked lot code on packaging; full batch traceability |
| Country of Origin | Japan |
17. Packaging & Ordering Information
| Parameter | Specification |
|---|---|
| Manufacturer Part Number | See product name |
| Ordering Code | DNGA150404MEF |
| Standard Packaging | 10 inserts per box (plastic case with individual pockets) |
| Minimum Order Quantity | 1 box (10 pcs) |
| Stock Status | In stock — ships within 1–3 business days |
| Warranty | 90-day manufacturing-defect warranty |
18. Catalog Meta Data
| Parameter | Specification |
|---|---|
| Brand | Kyocera |
| Product Type | Indexable Turning Insert |
| Full Product Name | Kyocera DNGA150404MEF KBN475 TFB02301D |
| ISO Code | DNGA150404MEF |
| Shape | Rhombic 55° |
| Grade | KBN475 |
| Nose Radius | 0.4 mm |
| Chipbreaker | MEF |
| Origin | Japan |
19. Frequently Asked Questions
Q: What materials can the DNGA150404MEF in grade KBN475 machine?
A: Grade KBN475 covers ISO K05–K20 / H15–H25: Gray Cast Iron, Hardened Steel.
Q: What feed should I start with on the DNGA150404MEF?
A: Start at fn ≈ 0.14 mm/rev — inside the MEF chipbreaker window — and adjust toward 0.28 mm/rev for medium cutting with the r = 0.4 mm nose radius.
Q: Which toolholder fits the DNGA150404MEF?
A: Any ISO holder with a Rhombic 55° seat in size 15 (e.g., the families listed in Section 14). Match the seat size exactly.
Q: When must I index the DNGA150404MEF?
A: Index at VB = 0.30 mm flank wear for finishing or 0.50 mm for roughing — running beyond this risks edge collapse and workpiece damage.
Q: Is the DNGA150404MEF suitable for interrupted cuts?
A: Light interruptions only; reduce feed 20–30% and consider a tougher grade for heavy interruptions.
20. Engineering Support
Kyotow.com provides free application-engineering support for this insert: grade selection, cutting-parameter optimization and tool-life troubleshooting. Contact our technical desk with your workpiece material, hardness and machine specification.
Why Buy from Kyotow.com? 100% genuine OEM Kyocera cutting tools sourced through authorized channels. Full manufacturer warranty & batch traceability. Fast worldwide shipping with tracked delivery. Free engineering support for cutting parameter selection, grade choice and application troubleshooting.
✓ Genuine Kyocera Product
| Manufacturer | Kyocera Corporation |
|---|---|
| Status | Verified Original Product |
| Quality Assurance | Guaranteed Genuine Kyocera Components |
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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.
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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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Kyotowは日本の国内流通ネットワークから京セラ正規品を直接仕入れることで、欧米の現地代理店による大幅な上乗せ価格や営業コスト、中間マージンを完全に排除しています。その構造的メリットを、お客様の加工現場へ100%還元いたします。
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