BEYOND MCBNR2020K12 External Turning Tool Holder - M-Type Clamping
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MCBNR2020K12
Professional M-Type External Turning Tool Holder
Brand: BEYOND | Origin: China | High-Rigidity Series
⚠️ ATTENTION: The tool holder includes all spare parts. Inserts (Blades) are NOT included.
Model Identification Guide
Clamping: Multi-lock
Shape: 80° Diamond
Approach: 75°
Clearance: 0°
Hand: Right Hand
20x20mm Shank
Length: 125mm
Insert: CNMG1204
Technical Specification & Spare Parts
Full parameters for MCBNR / MCBNL Series External Turning Tools:
| Model (R/L) | Compatible Insert | Shank(hxb) | Shim | Pin | Clamp | Screw | Wrench |
|---|---|---|---|---|---|---|---|
| MCBNR/L 2020K12 | CNMG 1204xx | 20 x 20 | MC1204 | CTM617 | HL1813 | ML0625 | L3.0 |
| MCBNR/L 1616H12 2525M12 / 3232P12 |
16x16 / 25x25 | ||||||
| MCBNR/L 2525M16 MCBNR/L 3232P16 |
CNMG 1606xx | 25x25 / 32x32 | MC1604 | CTM822 | HL2217 | ML0830 | L4.0 |
| MCBNR/L 3232P19 | CNMG 1906xx | 32 x 32 | MC1904 | CTM1025 | HL2724 | ML1035 | L5.0 |
Recommended Cutting Data
Carbon & Alloy Steel (P)
Cutting Speed (Vc): 160 - 280 m/min
Feed Rate (fz): 0.15 - 0.50 mm/r
Stainless Steel (M)
Cutting Speed (Vc): 120 - 210 m/min
Feed Rate (fz): 0.12 - 0.35 mm/r
Unit Reference & Shank Comparison
| Metric: 2020K12 (20mm) | Imperial: 12-4C (3/4") | Metric: 1616H12 (16mm) | Imperial: 10-4B (5/8") |
| Metric: 2525M12 (25mm) | Imperial: 16-4D (1") | Metric: 3232P19 (32mm) | Imperial: 20-4E (1-1/4") |
Global Verified Feedback
⭐⭐⭐⭐⭐ "The MCBNR2020K12 is extremely robust. I use it for roughing 4140 steel and it holds up perfectly." - Markus, Germany
⭐⭐⭐⭐⭐ "Perfect fit for CNMG12 inserts. BEYOND tool holders are high quality for a great price." - Liam, Australia
⭐⭐⭐⭐ "Impressive clamping rigidity. No vibration issues at high feeds." - S. Watanabe, Japan
⭐⭐⭐⭐⭐ "Fast shipping to Canada. Spare parts are well-made and precise." - Jason, Canada
⭐⭐⭐⭐⭐ "Much better than the standard P-type holders for heavy cuts. Very satisfied." - Robert, UK
Product Q&A
Q: Does this holder fit my manual lathe?
A: Yes, as long as your tool post can accommodate a 20x20mm (3/4") shank.
Q: Can I use CNMG120404 and CNMG120408 on this?
A: Absolutely. It fits all CNMG1204 series carbide inserts.
Clamping System Guide:
Long-tail Search Keywords: MCBNR2020K12, CNC External Turning Tool, Lathe Cutting Holder, CNMG Indexable Bar, BEYOND Tools China, 20mm Turning Shank.
© BEYOND CNC Tools - Industrial Grade Precision Engineering.
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.