R390 C20-21-200-2T CNC Milling Cutter Bar | Durable, High-Hardness Right Angle Milling Tool
Price shown is a starting point. Contact us for a precise quote based on your requirements.
Specifications:
- Designation: R390 C20-21-200-2T
- Blade material:Coated
- Handle diameter : 20mm
- Blade diameter : 21mm
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Total length of shank : 200mm
- Number of blades : 2
- Applicable blade : R39011T308M
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Adapter screws : M2.5*6
- Adapter wrenches : T8
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Package Includes: A knife bar(not include blade)
Features of thick corn knife:
- Made of high-quality steel 5KD61, quenched and hardened, high hardness
- Suitable for deep hole processing, the tool bar has strong shock resistance and long life
- Easy to replace the blade after wear, economical and cost-effective
- Back chamfer design, convenient chip removal after cutting, not easy to clog
- Stable precision, easy milling, exquisite tool bar workmanship
R390 C20-21-200-2T CNC Milling Cutter Bar | High-Performance Right Angle Milling Tool for Precision Machining
Maximize Cutting Efficiency with the R390 C20-21-200-2T Milling Cutter Bar | Shock-Resistant and Durable
Precision & Reliability in Deep Hole Processing | R390 C20-21-200-2T Milling Cutter Bar
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.