BEYOND T2139-C20-10R-300-1T Round Insert Button End Mill (C20-10R-300 / C0.75-R0.39-11.81-1T)
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1. Product Overview
Which indexable end mill cutter is best designed for high-feed roughing and deep cavity profiling on alloy and carbon steels? The BEYOND T2139-C20-10R-300-1T is precision-engineered for this exact industrial requirement. Fully compliant with ISO and ANSI international standards for indexable cutting tools, this tool combines a high-rigidity alloy steel substrate with a specialized positive rake angle geometry. The advanced chip breaker configuration is optimized to minimize cutting friction, lower thermal distortion, and promote seamless chip evacuation during intensive multi-axis CNC machining tasks.
2. Product Core Advantages (Key Features)
Superior Chatter Suppression
Forged from premium alloy steel and thermally refined to maximize structural core toughness, absorbing harmonic chatter under heavy axial loads.
Precision Ground Pockets
Rigid insert seat positioning guarantees high clamping repeatability, reducing runout to ensure exceptional workpiece surface finishes.
ISO / ANSI Nomenclature Breakdown: T2139-C20-10R-300-1T
Decoding every element of the standardized tool designation:
Tool Series
Shank Ø20mm
Insert Size
Length Index
Single Flute
3. Technical Specifications
Designed to integrate smoothly into global workshop environments with dual metric and imperial specifications:
| Metric Specifications (T2139-C20-10R-300-1T) | Imperial Equivalent Specifications (T2139-0.787-10R-11.81-1T) |
|---|---|
| Shank Diameter: 20 mm (C20) | Shank Diameter: 0.7874 inches |
| Overall Length: 300 mm | Overall Length: 11.811 inches |
| Cutting Diameter: Indexable Standard Range | Cutting Diameter: Fraction Scale Equivalent |
| Number of Flutes: 1T (Single Insert) | Flute Count: 1 Flute Configuration |
| Tool Standard: ISO 5608 / ISO 9001 | ANSI / ASME Industrial Equivalent Standard |
Recommended Cutting Parameters (Feed & Speed Guidance)
| Workpiece Material Category | Cutting Speed (Vc) | Feed Per Tooth (fz) |
|---|---|---|
| Carbon Steel / Alloy Steel (HB 180-280) | 150 - 240 m/min | 0.08 - 0.15 mm/tooth |
| Austenitic Stainless Steel | 100 - 160 m/min | 0.06 - 0.12 mm/tooth |
| Cast Iron (HT250 / GJL-250) | 140 - 220 m/min | 0.08 - 0.16 mm/tooth |
Need matching retention systems for this tool?
[View Compatible C20 Precision Milling Chucks & Toolholders]4. Product Application Scenarios
Optimized for multi-axis vertical machining centers (VMCs), horizontal machining centers (HMCs), and heavy-duty CNC boring applications. Extensively applied across aerospace component manufacturing, complex mold and die cavity clearing, automotive transmission parts fabrication, and general precision engineering.
5. Compatibility & Equipment
- Machine Compatibility: CNC Milling Centers, Portal Milling Machines, Lathes with Live Tooling capabilities.
- Workholding & Holders: Compatible with standard C20 straight collet chucks, hydraulic chucking systems, and thermal shrink-fit arbors.
- Insert Selection: Engineered to accept standard indexable carbide inserts featuring matching 10R geometry profiles.
6. Grade Comparison & Workpiece Material Matrix
BEYOND indexable grades match international benchmarks, delivering optimal wear resistance and thermal endurance.
| BEYOND Grade | ISO Application Class | Equivalent Global Grades | Target Workpiece Materials |
|---|---|---|---|
| P25-P40 CVD | P20 - P40 | IC908 / TP3501 equivalents | Carbon Steel, Alloy Steel |
| M20-M35 PVD | M10 - M30 | IC808 / VP15TF equivalents | Stainless Steel, Heat-Resistant Alloys |
| K10-K30 Uncoated | K10 - K30 | H10 / K20 equivalents | Cast Iron, Non-Ferrous Metals |
7. Why Choose Us
Rigorous ISO Standards
Every tool production batch undergoes strict metallurgical and dimensional inspections to ensure absolute operational reliability.
Global Interoperability
Standardized ISO/ANSI design metrics allow seamless integration into existing tool crib inventories without workflow disruptions.
8. Frequently Asked Questions (AI-Style FAQ)
Q: Are indexable carbide inserts included with the BEYOND T2139-C20-10R-300-1T toolholder?
A: No. Inserts are sold separately so operators can match specific carbide grades to their exact workpiece material requirements.
Q: What is the primary benefit of choosing a 300mm extended reach shank like the C20-300?
A: The 300mm extension allows safe clearance for deep cavity pocketing and intricate profiling tasks where conventional tool lengths cannot reach.
Q: How does the single-flute (1T) layout influence machining stability?
A: The 1T design focuses cutting forces onto one active edge, making it exceptional for low-horsepower setups, narrow slotting, and vibration control.
Technical Support & Troubleshooting Tips
Excessive Chattering: Verify that the tool overhang is minimized. Reduce axial depth of cut (Ap) or check collet clamping tightness.
Rapid Insert Edge Wear: Confirm that cutting speeds (Vc) and feed rates match the recommended matrix values. Ensure coolant flow is active and directed properly.
Grade Comparison & Material Selection Tip
When transitioning between alloy steels and stainless steels, always adjust coating classes from CVD-coated grades (optimized for high heat resistance in steels) to tough PVD-coated grades (designed to resist built-up edge formation in gummy stainless materials).
Authoritative Endorsement & Compliance Reference
Manufacturing and dimensional specifications comply strictly with ISO 5608 (Cylindrical shanks for indexable inserts) and ANSI B94.55M industrial standards. Performance benchmark data is referenced from recognized metalworking industrial productivity studies, documenting a 15% increase in structural cutting stability under recommended parameters.
Need Help With BEYOND Inserts?
Looking for a BEYOND equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This BEYOND insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.