Kyocera SGM PR1525 SGM00304 2FL SQ Endmill - Micro Machining
-40 %
Kyocera SGM PR1525 SGM00304 2FL SQ Endmill - Micro Machining
$24.51 USD
$40.85 USD
1 or more $24.51 USD
- Stock: In Stock
- Model: ENDMILL
- Weight: 0.10kg
- Manufactured: In Japan
- Ships: Worldwide
- Item Code: SGM00304
Product Overview
The Kyocera SGM00304 is a premium 0.008" (0.2032 mm) diameter, 2-flute square endmill from the renowned SGM series. Engineered in Japan with Fine grain carbide and finished with a TiN/TiAlN PVD coating, this tool is optimized for high-precision CNC milling operations requiring exceptional surface quality and dimensional accuracy. The 25° helix geometry ensures efficient chip evacuation while minimizing cutting forces, making it ideal for micro-machining applications in aerospace, medical device manufacturing, and precision mold making.
ISO Designation Breakdown
| Designation Element | Code | Meaning |
|---|---|---|
| Series | SGM | Solid Carbide Micro Endmill |
| Item Code | 00304 | Product-specific identifier |
| Grade | PR1525 | Carbide substrate & coating specification |
| Flutes | 2FL | 2-flute design for slotting & profiling |
| End Type | SQ | Square end (0° corner radius) |
| Full ISO | SGM-00304-PR1525 | Complete ordering designation |
Engineering Dimensions & Geometry
| Parameter | Metric | Imperial |
|---|---|---|
| Cutting Diameter (D1) | 0.2032 mm | 0.008" |
| Shank Diameter (D2) | 3.175 mm | 1/8" |
| Overall Length (L1) | 38.0 mm | 1.496" |
| Flute Length (L2) | 0.61 mm | 0.024" |
| Number of Flutes | 2 | — |
| Helix Angle | 25° | — |
| Corner Radius | 0.0 mm | 0.0" (Square) |
| Primary Clearance | 14° primary | — |
| Rake Angle | 6° positive | — |
| Runout Tolerance | ≤5 μm | ≤0.0002" |
Grade Details — Key Grade Characteristics
The PR1525 grade represents Kyocera's advanced carbide technology, specifically developed for general purpose machining. This grade combines a Fine grain carbide with a TiN/TiAlN PVD coating to deliver superior performance in demanding applications.
| Characteristic | Specification |
|---|---|
| Substrate Material | Fine grain carbide |
| Coating Type | TiN/TiAlN PVD |
| Hardness | HRA 92.0 |
| Coating Color | Gold-Purple |
| Max Operating Temp | 850°C |
| Wear Resistance | Good |
| Chipping Resistance | Very Good |
Grade Comparison Matrix
| Metric | PR1535 | PR1725 | CA6535 | PR1525 |
|---|---|---|---|---|
| Wear Resistance | ★★★★★ | ★★★★★ | ★★★★☆ | ★★★★☆ |
| Chipping Resistance | ★★★★☆ | ★★★★★ | ★★★☆☆ | ★★★★☆ |
| Heat Resistance | ★★★★☆ | ★★★★★ | ★★★☆☆ | ★★★★☆ |
| Price Index | Standard | Premium | Standard | Economy |
| Best For | Steel & Stainless | Hardened Materials | Aluminum & Non-ferrous | General Purpose |
Note: This product is supplied in grade PR1525. Other grades available by special order — contact Kyotow.com technical support for grade substitution recommendations.
Chipbreaker Profile
The SGM00304 features a Low-Helix 25° flute geometry specifically engineered for 0.008" diameter tools. Optimized rigidity for hard materials and interrupted cuts.
| Parameter | Value |
|---|---|
| Flute Geometry | 25° Right-hand helix |
| Rake Angle | 6° positive |
| Primary Clearance | 14° primary |
| Core Diameter | ~60% of outer diameter (high rigidity) |
| Edge Prep | Micro-honed edge (T-land preparation) |
Recommended Applications & Workpiece Materials
| Workpiece Material | Suitability | Notes |
|---|---|---|
| Carbon Steel (≤45 HRC) | Very Good | Very good performance |
| Alloy Steel (≤50 HRC) | Good | Acceptable with reduced speeds |
| Stainless Steel (304/316) | Good | Acceptable with reduced speeds |
| Cast Iron (GG/GGG) | Very Good | Very good performance |
| Aluminum (6061/7075) | Very Good | Very good performance |
| Titanium (Ti-6Al-4V) | Fair | Not recommended |
| Hardened Steel (50-55 HRC) | Fair | Not recommended |
| Copper & Brass | Excellent | Optimal performance |
Application Map by Operation
| Operation | Suitability | Recommended Parameters |
|---|---|---|
| Face Milling | Good | ae = 0.06 mm, ap = 0.1 mm, climb milling preferred |
| Slotting | Very Good | ae = 0.2 mm (full slot), ap = 0.1 mm, peck recommended >3xD |
| Pocketing | Good | ae = 0.12 mm, ap = 0.08 mm, helical entry |
| Profiling | Excellent | ae = 0.04 mm, ap = 0.3 mm, finish pass 0.05 mm |
| Plunging | Good | Plunge angle ≤2°, peck depth 0.06 mm, center cutting capable |
| Ramping | Very Good | Ramping angle ≤5°, ae = 0.1 mm, constant engagement |
Recommended Cutting Conditions
Values shown are starting recommendations. Optimize based on machine rigidity, workpiece material, and desired surface finish. Use coolant or MQL for best results.
| Parameter | Value | Notes |
|---|---|---|
| Cutting Speed (Vc) | 140 m/min | Adjust ±20% based on material |
| Spindle Speed (n) | 219,308 RPM | Ensure machine can reach speed |
| Feed per Tooth (fz) | 0.003 mm/z | Reduce for better finish |
| Feed Rate (Vf) | 1315 mm/min | 2-flute calculation |
| Axial Depth (ap) — Slotting | 0.203 mm | 1×D max for full slot |
| Axial Depth (ap) — Profiling | 0.61 mm | Up to 3×D for side milling |
| Radial Depth (ae) | 0.102 mm | 0.5×D for roughing |
| Coolant | Emulsion / MQL / Air | Avoid thermal shock |
| Max Overhang | ≤5×D for rigid setup | Use shortest possible toolholder |
Operating Guidelines
- Runout Control: Maintain total indicated runout (TIR) ≤5 μm at the tool tip. Excessive runout causes uneven load distribution and premature failure in micro-endmills.
- Tool Overhang: Minimize overhang to the shortest practical length. For every 1×D increase in overhang, reduce cutting speed by 10%.
- Entry Strategy: Use helical or ramp entry for pocketing operations. Avoid direct plunging into solid material at speeds exceeding 50% of recommended feed rate.
- Chip Evacuation: Ensure adequate coolant flow or air blast to clear chips from the cutting zone. Recutting chips is the primary cause of micro-endmill breakage.
- Workpiece Fixturing: Secure workpieces rigidly. Vibration or chatter will significantly reduce tool life and surface quality.
- Speed Ramp-Up: When testing new parameters, start at 70% of recommended cutting speed and increase incrementally while monitoring tool wear and surface finish.
- Corner Engagement: In internal corners, reduce feed rate by 30-50% to avoid excessive radial engagement and potential tool breakage.
- Inspection: Inspect cutting edges under magnification (>20×) before and after use. Do not use tools with visible chipping or edge damage.
Toolholder Compatibility
For optimal performance with the 0.008" SGM00304, select toolholders that minimize runout and maximize grip force. The following configurations are recommended:
| Toolholder Type | Runout | Grip Force | Best Application | Notes |
|---|---|---|---|---|
| ER11 Precision Collet | ≤5μm | High | Micro-machining | Use minimum runout collet for diameters <0.3mm |
| ER16 Precision Collet | ≤5μm | High | General micro-milling | Recommended for shank Ø3.175mm (1/8") |
| Shrink Fit Holder | ≤3μm | Very High | High-speed machining | Optimal for spindle speeds >30,000 RPM |
| Hydraulic Chuck | ≤3μm | Very High | Heavy interrupted cuts | Excellent damping for difficult applications |
| Milling Chuck | ≤10μm | Medium | Roughing operations | Not recommended for finishing with micro-endmills |
| Collet Chuck | ≤8μm | Medium | Standard operations | Ensure collet is clean and undamaged |
Packaging & Ordering Information
| Attribute | Details |
|---|---|
| Unit Quantity | 1 Piece |
| Packaging | Individual plastic tube with foam insert |
| Labeling | Laser-marked with part number, diameter, and grade |
| Storage Conditions | Store in original packaging at 15-25°C, humidity <60% |
| Shelf Life | Indefinite when stored properly (carbide does not degrade) |
| HS Code | 8207.70.00 |
| Country of Origin | Japan |
| Warranty | Manufacturer defect warranty - 12 months from invoice date |
Catalog Meta Data
| Field | Value |
|---|---|
| Catalog Series | SGM-2FL-SQ |
| Catalog Page | Micro Endmills Section, Page 15 |
