Kyocera 0.0550 PR1535 SGM04249 3FL SQ Endmill - CNC Milling
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- Stock: In Stock
- Model: ENDMILL
- Weight: 0.10kg
- Manufactured: In Japan
- Ships: Worldwide
- Item Code: SGM04249
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Product Overview
The Kyocera SGM04249 is a premium solid carbide micro endmill engineered for high-precision CNC milling operations. Featuring a 0.0550" (1.40 mm) cutting diameter with 3-flute square geometry, this tool is manufactured to exacting standards in Japan for applications demanding exceptional surface finish, tight tolerances, and extended tool life. The PR1535 grade substrate combined with advanced PVD coating technology ensures superior wear resistance and thermal stability across a wide range of workpiece materials.
ISO Designation Breakdown
| Designation Element | Description |
| Series Code | SGM – Solid Carbide Micro Endmill Series |
| Catalog No. | SGM04249 |
| Diameter (D) | 0.0550" (1.40 mm) |
| Flutes (Z) | 3 Flutes |
| Geometry | Square End (SQ), Standard Length |
| Grade | PR1535 – Micro-Grain Carbide with PVD Coating |
Engineering Dimensions & Geometry
| Parameter | Value | Tolerance |
| Cutting Diameter (D1) | 0.0550" (1.40 mm) | h6 (-0.004 / -0.009 mm) |
| Flute Length (L1) | 0.165" | ±0.005" |
| Overall Length (L) | 1.500" | ±0.010" |
| Shank Diameter (D2) | 1/8" | h6 |
| Helix Angle | 38° | ±2° |
| Corner Radius | Sharp (0.000" nominal) | ±0.001" |
| Core Diameter Ratio | ~65% of D1 | — |
Grade Details – Key Grade Characteristics
The PR1535 grade is a micro-grain cemented carbide substrate featuring a sub-micron grain structure (0.5 μm average) combined with a multi-layer PVD coating system. This grade is specifically developed for micro-machining applications where edge integrity and coating adhesion are critical.
| Characteristic | Specification |
| Substrate Hardness | 92.0 HRA (1,600 HV) |
| Grain Size | 0.5 μm (Ultra-Fine) |
| Coating System | PR1535 Advanced PVD |
| Coating Hardness | 3,200 HV |
| Max Operating Temp. | 850°C (1,562°F) |
| Transverse Rupture Strength | 4,200 MPa |
Grade Comparison Matrix
| Grade | Coating | Best For | Speed Capability |
| PR1535 | Multi-Layer PVD | General Purpose, Steel, Stainless | High |
| PR1725 | AlTiCrN PVD | Hardened Steel >50 HRC | Medium-High |
| CA6535 | TiAlN PVD | Aluminum, Non-Ferrous | Very High |
| PR1210 | Uncoated | Plastics, Composites, Wax | High |
Chipbreaker Profile
The SGM series features an optimized 3-flute square geometry with a precision-ground flute profile designed for superior chip evacuation in micro-machining environments. The flute design incorporates:
- Variable Helix Geometry: Reduces harmonic vibration and chatter during high-speed engagement.
- Polished Flute Surfaces: Minimizes chip adhesion and built-up edge (BUE) formation.
- Positive Rake Face: Generates low cutting forces, ideal for thin-walled components and delicate features.
- Core Reinforcement: Enhanced core diameter provides rigidity without compromising chip pocket volume.
Recommended Applications & Workpiece Materials
| Material Group | Machinability | Recommended Use |
| Carbon Steel (AISI 1045) | ★★★★★ Excellent | Slotting, Profiling, Pocketing |
| Alloy Steel (4140, 4340) | ★★★★☆ Very Good | Precision Contouring, Finishing |
| Stainless Steel (304, 316) | ★★★★☆ Very Good | Shallow Slotting, Peripheral Milling |
| Tool Steel (H13, D2) | ★★★☆☆ Good | Finishing Passes, Light DOC |
| Titanium (Ti-6Al-4V) | ★★★☆☆ Good | Peripheral Milling, Trochoidal |
| Aluminum (6061, 7075) | ★★★★★ Excellent | High-Speed Machining, Mirror Finish |
Application Map by Operation
| Operation Type | Suitability | Notes |
| Slotting (Axial DOC = 1×D) | ✓ Recommended | Use climb milling; reduce feed by 20% for full slotting |
| Profiling / Contouring | ✓✓ Ideal | Excellent surface finish achievable at high speeds |
| Pocketing | ✓ Recommended | Use helical entry; avoid plunging directly |
| Plunging (Z-Axis) | ✗ Not Recommended | Square endmills lack center cutting capability |
| Trochoidal Milling | ✓✓ Ideal | Low radial engagement maximizes tool life |
| Micro-Finishing | ✓✓ Ideal | Minimal runout required (<0.005 mm TIR) |
Recommended Cutting Conditions
Values are starting recommendations. Optimize based on machine rigidity, workpiece fixturing, and coolant delivery.
| Parameter | Value / Range | Unit |
| Spindle Speed (Vc) | 10,000 – 20,000 | RPM |
| Feed per Tooth (fz) | 0.0003 – 0.0012 | inch/tooth |
| Feed Rate (Vf) | 8 – 18 | inch/min |
| Axial Depth of Cut (ap) | 0.008 – 0.020" | inch |
| Radial Depth of Cut (ae) | 0.003 – 0.010" (10–30% of D1) | inch |
| Coolant | Emulsion (5–8%) or Oil Mist | — |
Operating Guidelines
- Runout Control: Ensure tool runout is less than 0.005 mm (0.0002") TIR at the tool tip. Excessive runout dramatically reduces tool life in micro-machining.
- Entry Strategy: Always use ramp or helical entry. Never plunge vertically with a square endmill.
- Coolant Delivery: Direct coolant to the cutting zone at high pressure. Chip evacuation is critical at micro scales.
- Speeds First: Start at the lower end of the recommended speed range and increase gradually while monitoring tool wear and surface finish.
- Depth of Cut: For full slotting, limit axial DOC to 0.5–1.0× tool diameter. For profiling, up to 2×D is possible with reduced feed.
- Tool Inspection: Inspect cutting edges under magnification before and after use. Micro-chipping is the primary failure mode.
Toolholder Compatibility
| Holder Type | Compatibility | Notes |
| ER11 Collet Chuck | ✓ Compatible | Use high-precision collet (≤0.005 mm runout) |
| ER16 Collet Chuck | ✓ Compatible | Preferred for 1/8" shank micro endmills |
| Shrink Fit Holder | ✓✓ Recommended | Best runout control for micro-machining |
| Hydraulic Chuck | ✓ Compatible | Good damping; suitable for long overhangs |
| Weldon Flat Holder | ✗ Not Compatible | Shank does not feature a Weldon flat |
Packaging & Ordering Information
| Item | Details |
| Manufacturer Part Number | SGM04249 |
| Packaging | Individual plastic tube with foam insert; 10 pcs per inner box |
| Minimum Order Quantity | 1 piece |
| Unit Price | $52.30 USD |
| Warranty | Full manufacturer defect warranty – 12 months from date of purchase |
| Country of Manufacture | Japan |
Catalog Meta Data
| Field | Value |
| Catalog Series | SGM – Solid Carbide Micro Endmills |
| Tool Category | Rotating Tool / Endmill |
| Tool Sub-Category | Square Endmill, 3-Flute, Standard Length |
| Industry Standards | ANSI B94.19, ISO 1641 |
| ECCN Classification | EAR99 |
| HS Code | 8207.70.60 |
| Last Catalog Update | 2026-Q2 |
✓ Genuine Kyocera Product
| Manufacturer | Kyocera Corporation |
|---|---|
| Status | Verified Original Product |
| Quality Assurance | Guaranteed Genuine Kyocera Components |
発送・在庫情報
We ship worldwide through our strategic global logistics network. Products are dispatched directly from our international distribution facilities to ensure efficient delivery and customs clearance.
-
Stock Enquiries (在庫確認):
Contact our logistics team at sales.kyotow@gmail.com for real-time inventory status and dispatch location information. -
In-Stock Items (在庫あり):
Normally dispatched within 3 business days from the nearest regional warehouse. -
Factory Procurement (取寄せ):
Manufacturing and dispatch typically require 4–5 weeks. Once production begins, cancellations cannot be accommodated. -
Authenticity Guarantee (本物保証):
All products sold by Kyotow are 100% genuine and sourced through authorized Japanese and international distribution channels.
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
-
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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国際スピード郵便
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✓ Flat Worldwide Shipping Rate: USD $50
Orders are shipped through our DHL Express corporate account from distribution facilities across Asia, Europe, and China for reliable international delivery.
Need Technical Assistance?
Contact our industrial tooling specialists for application support, tooling recommendations, datasheets, and compatibility verification.
sales.kyotow@gmail.comDirect Supply Chain Transparency サプライチェーンの透明性
Why are our prices so low? (価格が安い理由): Kyotow sources genuine Kyocera tools directly from domestic Japanese distribution networks, completely bypassing the steep regional markups, localized sales overhead, and heavy middleman margins of Western distributors. We pass 100% of those structural savings directly to your machine shop.
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。
Domestic Sourced
Procured straight from Japan's local wholesale networks to capture maximum market arbitrage.
100% Genuine
Zero counterfeit risk. All items are brand-new, authentic factory-sealed Japanese stock.
No Regional Markups
We bypass Western corporate sales teams and localized regional overhead costs entirely.
