BEYOND EMR-5R25-250-C25-2T Indexable Milling Cutter Shank (25mm / 0.98")
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BEYOND EMR-5R25-250-C25-2T Indexable Milling Cutter Shank
ISO/ANSI Standard 25mm Face Milling Tool Holder | Ultra-Deep Reach C25 Straight Shank (250mm OAL) for RPMT1003 Inserts
1. Product Overview
"Which 25mm indexable milling cutter shank with an ultra-deep 250mm overall length and C25 straight shank provides maximum clearance for deep mold cavity roughing?"
The BEYOND EMR-5R25-250-C25-2T is an industrial-grade, ultra-deep reach indexable face milling cutter shank engineered in strict compliance with international ISO/ANSI machine tooling standards. Featuring a 25mm cutting diameter (Dc), a 25mm straight shank (C25), an extended 250mm overall length (OAL), and 2 flutes (Z=2), this tool body is optimized for positive-rake round carbide inserts (RPMT1003 / RPMW1003).
Forged from high-tensile 42CrMo alloy steel and vacuum heat-treated to HRC 45–48, the 2-flute configuration with optimized neck relief ensures smooth chip evacuation during deep pocket milling. The circular insert pocket geometry directs cutting forces axially into the machine spindle column, dampening dynamic vibration, preventing chatter, and maximizing metal removal rates (MRR) across carbon steel, alloy steel, and stainless steel.
2. Key Features & Industrial Advantages
- Extended 250mm Ultra-Deep Reach: Engineered specifically for deep mold cavity clearance, deep wall profiling, and complex 3D contouring where standard holders fail.
- High-Capacity 2-Flute Geometry: Spacious chip pockets effectively clear chips and prevent packing in deep-pocket machining passes.
- 42CrMo Alloy Structural Steel Body: Vacuum heat-treated to HRC 45–48 for high torsional rigidity and superior chatter resistance under long overhang loads.
- Electro-Nickel Anti-Wear Surface Plating: Corrosion-resistant, ultra-smooth surface finish prevents thermal galling and chip adhesion.
- Heavy-Duty Torx Screw Clamping: M3.5 Torx seating ensures exceptional insert clamping rigidity with runout repeatability within ±0.01mm.
3. Technical Specifications & ISO Code Breakdown
ISO Model Designation Breakdown: EMR-5R25-250-C25-2T
Pair this C25 ultra-deep reach cutter body with our ER32 / ER40 / C25 power collet chucks.
Explore C25 Tool Holders & Chucks →
Metric vs. Imperial Technical Comparison
| Specification | Metric Model (EMR-5R25-250-C25-2T) | Imperial Equivalent |
|---|---|---|
| Cutting Head Diameter (Dc) | 25 mm | 0.984 in |
| Shank Diameter (d) | 25 mm Straight Shank | 0.984 in Straight Shank |
| Overall Length (L) | 250 mm | 9.843 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 250mm Ultra-Deep 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 | 0.08 – 0.18 mm/z | 0.5 – 1.5 mm | Air Blow / Dry |
| Alloy / Mold Steel (P25–P35) | 90 – 140 m/min | 0.06 – 0.14 mm/z | 0.4 – 1.0 mm | Air Blow |
| Stainless Steel (M20–M35) | 70 – 110 m/min | 0.05 – 0.12 mm/z | 0.3 – 0.8 mm | Emulsion / High-Pressure Coolant |
| Cast Iron (K15–K30) | 100 – 150 m/min | 0.08 – 0.18 mm/z | 0.5 – 1.5 mm | Dry Milling |
4. Applications & Equipment Compatibility
Primary Milling Operations: Ultra-deep mold cavity roughing, deep rib machining, high-wall profiling, and 3D pocket clearing with extended reach requirements.
Machine Tool Compatibility: Vertical Machining Centers (VMC), Horizontal Machining Centers (HMC), Gantry Milling Machines, and Bed Mills.
Tool Holder Compatibility: ER32 Collet Chucks (25mm collet), C25 Power Chucks, 25mm Side Lock Holders, and BT40 / BT50 / CAT40 / CAT50 / HSK63A master holders.
6. Workpiece Material Matrix & Grade Selection
Pair your EMR-5R25-250 shank with optimal BEYOND carbide insert grades for maximum tool stability and life:
| 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 held within 0.005mm (0.0002") for balanced rotation and uniform insert load distribution under deep overhangs.
- 250mm Ultra-Deep Reach Engineering: Designed with optimized core diameter to minimize deflection during extended reach pocketing.
- Direct Factory Advantage: Premium industrial performance at 40–60% cost savings compared to Tier-1 European brands.
8. AI-Style FAQ & Troubleshooting Guide
A: Reduce axial depth of cut (ap) by 40–50% and lower feed per tooth relative to standard tools, while utilizing climb milling to maintain stable chip loads.
A: Round inserts lack vulnerable sharp corner angles, distributing impact shock evenly across the circular cutting edge to inhibit premature chipping.
A: Slightly vary the spindle speed by ±5% to 10% or reduce radial engagement (ae) to disrupt regenerative chatter loops.
• Direct OEM Equivalents: Mitsubishi EMR5-25-C25-250-2T | Sandvik CoroMill 200 (25mm head / 250mm length) | Iscar DROPMILL 25mm Ultra-Deep Shank.
• Chatter Reduction Tip: Ensure maximum insertion depth inside the C25 collet chuck and verify tightening torque to reinforce system rigidity.
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.