BEYOND MCBNR2020K12 External Turning Tool Holder - M-Type Clamping

$22.83 USD

Price shown is a starting point. Contact us for a precise quote based on your requirements.

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Description

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

M
Clamping: Multi-lock
C
Shape: 80° Diamond
B
Approach: 75°
N
Clearance: 0°
R
Hand: Right Hand
2020
20x20mm Shank
K
Length: 125mm
12
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:

M-TYPE: Multi-Lock (Clamp + Pin). Maximum rigidity for heavy roughing and longitudinal turning.
W-TYPE: Lever Clamping. Fastest for quick insert changes in general operations.
P-TYPE: Hole Clamping. Provides the best chip clearance for high-speed finishing.
S-TYPE: Screw Clamping. Minimal interference, best for internal boring and small diameters.

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

Are your carbide inserts interchangeable with major brands like Sandvik, Iscar, or Kennametal?

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.

How do I choose the correct insert grade and chipbreaker for machining Stainless Steel (M) vs. Carbon Steel (P)?

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.
What are the recommended cutting speed (Vc) and feed rate (f) parameters to maximize tool life?

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.
Do you offer bulk discounts or wholesale pricing for machine shops and distributors?

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.

What is your international shipping policy and typical lead time for orders?

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.

How do you guarantee the quality and tolerance precision of your CNC tools?

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.