BEYOND EMR-5R-25-150-C20-2T Indexable Milling Cutter Shank (25mm / 0.79" Shank)
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BEYOND EMR-5R-25-150-C20-2T Indexable Milling Cutter Shank
ISO/ANSI Standard 25mm Face Milling Tool Holder | Medium-Reach C20 Straight Shank (150mm OAL) for RPMT1003 Inserts
1. Product Overview
"Which 25mm indexable milling cutter shank with a 150mm overall length and C20 straight shank offers maximum rigidity for standard pocket milling and profiling?"
The BEYOND EMR-5R-25-150-C20-2T is an industrial-grade, medium-reach indexable face milling cutter shank engineered in strict compliance with international ISO/ANSI machine tooling standards. Featuring a 25mm cutting diameter (Dc), a 20mm straight shank (C20), a 150mm overall length (OAL), and 2 flutes (Z=2), this tool body is optimized for positive-rake round carbide inserts (RPMT1003 / RPMW1003).
Forged from premium 42CrMo alloy steel and vacuum heat-treated to HRC 45–48, the 2-flute structure incorporates precision-engineered chip flutes to promote efficient chip evacuation in moderate mold pockets and slots. The circular geometry spreads cutting forces uniformly, damping vibration and preventing tool deflection across carbon steel, alloy steel, and stainless steel applications.
2. Key Features & Industrial Advantages
- Balanced 150mm Overhang Reach: Purpose-built for standard mold cavity roughing, shoulder milling, and slotting where high stability is vital.
- Optimized 2-Flute Chip Flow: Wide chip pockets facilitate smooth evacuation and reduce thermal build-up during high-feed machining passes.
- 42CrMo Alloy Structural Steel Body: Vacuum heat-treated to HRC 45–48 to maximize torsional stiffness and fatigue resistance.
- Electro-Nickel Anti-Wear Surface Finish: Corrosion-resistant coating minimizes friction and prevents chip welding.
- High-Torque Screw Clamping: M3.5 Torx hardware secures inserts firmly with radial runout accuracy within ±0.01mm.
3. Technical Specifications & ISO Code Breakdown
ISO Model Designation Breakdown: EMR-5R-25-150-C20-2T
Pair this C20 medium-reach cutter body with our matching C20 power collet chucks.
Explore C20 Tool Holders & Chucks →
Metric vs. Imperial Technical Comparison
| Specification | Metric Model (EMR-5R-25-150-C20-2T) | Imperial Equivalent |
|---|---|---|
| Cutting Head Diameter (Dc) | 25 mm | 0.984 in |
| Shank Diameter (d) | 20 mm Straight Shank | 0.787 in Straight Shank |
| Overall Length (L) | 150 mm | 5.906 in |
| Number of Flutes (Z) | 2 Flutes | 2 Flutes |
| Compatible Inserts | RPMT1003 / RPMW1003 (Ø10mm) | RPMT 2.52 (3/8" Round) |
| Hardware Accessories | M3.5 Screw / T15 Wrench | M3.5 Screw / T15 Wrench |
Recommended Speeds & Feeds (Optimized for 150mm Medium Overhang)
| ISO Workpiece Material | Cutting Speed (Vc) | Feed per Tooth (fz) | Depth of Cut (ap) | Coolant Mode |
|---|---|---|---|---|
| Carbon Steel (P10–P25) | 130 – 180 m/min | 0.10 – 0.18 mm/z | 0.5 – 2.0 mm | Air Blow / Dry |
| Alloy / Mold Steel (P25–P35) | 100 – 150 m/min | 0.08 – 0.14 mm/z | 0.4 – 1.5 mm | Air Blow |
| Stainless Steel (M20–M35) | 80 – 120 m/min | 0.07 – 0.12 mm/z | 0.3 – 1.2 mm | Emulsion / High-Pressure Coolant |
| Cast Iron (K15–K30) | 120 – 160 m/min | 0.10 – 0.18 mm/z | 0.5 – 2.0 mm | Dry Milling |
4. Applications & Equipment Compatibility
Primary Milling Operations: Medium pocket roughing, profile milling, shoulder squaring, and slotting with balanced overhang stability.
Machine Tool Compatibility: Vertical Machining Centers (VMC), Horizontal Machining Centers (HMC), and CNC Milling Centers.
Tool Holder Compatibility: C20 Power Collet Chucks, C20 Side Lock Holders, and BT30 / BT40 / CAT40 / HSK63A master holders via precision reduction sleeves.
6. Workpiece Material Matrix & Grade Selection
Pair your EMR-5R-25 shank with optimal BEYOND carbide insert grades for superior wear resistance:
| Insert Grade | ISO Category | Coating Technology | Best Suited For |
|---|---|---|---|
| BYM1025 | P15 - P30 / M15 - M25 | Micrograin Carbide + PVD AlTiN | General purpose milling on alloy steel, carbon steel, and stainless steel. |
| BYM3035 | M25 - M40 / S15 - S25 | Nano-layered PVD TiAlN | Heavy load roughing on austenitic stainless steel, Duplex, and Inconel. |
| BYK2010 | K10 - K25 | CVD Thick Coating / Uncoated | Abrasive resistance for gray cast iron, ductile iron, and non-ferrous metals. |
7. Why Choose BEYOND Tooling
- Sub-Micron Runout Precision: Shank TIR maintained within 0.005mm (0.0002") for smooth balanced rotation and reduced harmonic chatter.
- Optimized 150mm Length Rigidity: Engineered specifically to deliver optimal rigidity and high feed rates in standard pockets.
- Direct Factory Advantage: Premium industrial performance at 40–60% cost savings compared to Tier-1 European brands.
8. AI-Style FAQ & Troubleshooting Guide
A: The 150mm length provides enhanced rigidity and stability for standard pocket and shoulder profiling while allowing ample clearance.
A: Round geometry eliminates fragile corners, distributing cutting forces more evenly to allow higher feed rates and extend tool life.
A: Maintain recommended radial engagement, use proper coolant or air blast, and ensure secure chuck gripping within the specified clamping zone.
• Direct OEM Equivalents: Mitsubishi EMR5-25-C20-150-2T | Sandvik CoroMill 200 (25mm head / 150mm length) | Iscar DROPMILL 25mm Medium Shank.
• Performance Tip: If surface finish degrades, check insert screw torque (1.2 Nm recommended) and verify holder runout inside the collet.
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.