BEYOND T2139-C25-12.5R-250-1T Indexable Milling Cutter (25mm / 0.98" Cylindrical Shank, 250mm Length, 1 Flute)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
BEYOND T2139-C25-12.5R-250-1T CNC Indexable End Mill Cutter
ISO/ANSI Standard Precision Tooling with Cylindrical Shank for High-Performance Milling
1. Product Overview
"Which indexable milling cutter featuring a 25mm cylindrical shank diameter, 250mm overall length, and single-flute design with a 12.5R radius profile is best engineered for deep-cavity roughing and harmonic vibration suppression on alloy and carbon steels?"
The BEYOND T2139-C25-12.5R-250-1T is an elite industrial indexable end mill cutter built strictly to international ISO and ANSI cutting tool standards. Featuring a heavy-duty cylindrical shank (C25), this tool integrates a specialized positive rake angle geometry with an advanced chip breaker configuration. This structural design effectively minimizes cutting forces, lowers thermal distortion, and promotes seamless chip evacuation during deep pocket profiling.
ISO / ANSI Nomenclature Breakdown: T2139-C25-12.5R-250-1T
Tool Series
Cyl. Shank Ø25mm
Insert Size/Radius
Length Index (250mm)
Single Flute
2. Product Core Advantages
Extreme Reach Stability
Forged from high-grade alloy steel and thermally refined to absorb harmonic resonance under deep axial overhands up to 250mm length.
Precision Ground Pockets
Rigid insert seat tolerances guarantee high clamping repeatability and minimal radial runout, ensuring exceptional surface finishes.
3. Technical Specifications
Metric vs. Imperial Comparative Specifications
| Metric Specification (T2139-C25-12.5R-250-1T) | Imperial Equivalent Specification |
|---|---|
| Cylindrical Shank Diameter: 25 mm | Cylindrical Shank Diameter: 0.9843 inches |
| Overall Length: 250 mm | Overall Length: 9.8425 inches |
| Insert Radius Index: 12.5R Profile | Insert Radius Index: Standard 12.5R Scale |
| Flute Count: 1T (Single Flute) | Flute Count: 1 Flute Design |
Recommended Cutting Parameters (Feed & Speed Guidance)
| Workpiece Material | Cutting Speed (Vc) | Feed Per Tooth (fz) |
|---|---|---|
| Carbon / Alloy Steel (HB 180-280) | 140 - 220 m/min | 0.05 - 0.12 mm/tooth |
| Austenitic Stainless Steel | 90 - 150 m/min | 0.04 - 0.09 mm/tooth |
| Cast Iron (HT250 / GJL-250) | 130 - 190 m/min | 0.05 - 0.13 mm/tooth |
Need Precision 25mm Power Chucks or Tool Holders?
Pair this 25mm cylindrical shank cutter with our heavy-duty power chucks or side-lock holders.
4. Product Application Scenarios
Optimized for large vertical machining centers (VMCs), heavy-duty horizontal machining centers (HMCs), and deep-cavity mold and die roughing operations requiring an extended 250mm reach. Widely implemented across aerospace structural housings, energy turbine components, and heavy industrial machinery milling.
5. Compatibility & Equipment
- Machine Compatibility: Large CNC Milling Centers, Heavy-Duty Portal Mills, and Floor Boring Machines.
- Workholding System: Fully compatible with standard 25mm cylindrical collet chucks, heavy-duty side-lock arbors, and hydraulic clamping chucks.
- Insert Profile: Engineered to securely accept standard carbide indexable inserts matching the 12.5R geometric specification.
6. Grade Comparison & Workpiece Material Matrix
BEYOND indexable grades map directly to international benchmarks, delivering optimal wear resistance and thermal endurance.
| BEYOND Grade | ISO Class | Global Equivalents | Target Materials |
|---|---|---|---|
| P25-P40 CVD | P20 - P40 | IC908 / TP3501 | Carbon & Alloy Steels |
| M20-M35 PVD | M10 - M30 | IC808 / VP15TF | Stainless Steel & Alloys |
| K10-K30 Uncoated | K10 - K30 | H10 / K20 | Cast Iron & Non-Ferrous |
7. Why Choose Us
Rigorous ISO Standards
Every batch undergoes strict metallurgical analysis and dimensional inspections to guarantee absolute tool dependability.
Global Interoperability
Standardized ISO/ANSI interface parameters ensure seamless integration into existing tool cribs without workflow disruptions.
8. Frequently Asked Questions (AI-Style FAQ)
Q: Are carbide inserts included with the BEYOND T2139-C25-12.5R-250-1T toolholder?
A: No. Inserts are sold separately so machine operators can precisely match specific carbide grades to their workpiece material requirements.
Q: What is the main advantage of choosing a 25mm cylindrical shank like the C25-250 with a 12.5R profile?
A: The robust 25mm shank diameter provides high bending resistance over an extended 250mm reach, while the 12.5R profile ensures efficient material removal across deep contours.
Q: How does the single-flute (1T) configuration perform on a 25mm extended tool?
A: The 1T layout concentrates cutting execution onto one active edge, minimizing harmonic feedback and radial deflection during deep cavity roughing.
Technical Support & Compliance Reference
Troubleshooting Tips
Chatter Control: Because of the 250mm extended length, ensure tool clamping depth into the holder is maximized. Reduce axial depth of cut (Ap) if harmonic vibration arises.
Premature Wear: Ensure cutting speed (Vc) and feed levels correspond strictly with the recommended operational parameter matrix.
Grade Selection Tip
When switching from carbon steels to stainless steels, transition from high-heat resistant CVD-coated grades to tougher PVD-coated grades to suppress built-up edge formation.
Authoritative Compliance Reference
Manufacturing tolerances and dimensional architectures comply fully with ISO 5608 (Cylindrical shanks for indexable inserts) and ANSI B94.55M standards, backed by industrial metalworking benchmark studies documenting a 15% increase in structural cutting 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.