turning tool holder identification

BEYOND MCBNL2525M12 Left-Hand External Turning Tool Holder | M-Type Clamping

$33.16 USD

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

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Description

MCBNL2525M12

Professional Left-Hand M-Type External Turning Tool Holder

Brand: BEYOND | Origin: China | Industrial 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°
L
Hand: Left Hand
2525
25x25mm Shank
M
Length: 150mm
12
Insert: CNMG1204

Technical Specification & Series Comparison

Detailed specifications for the MCBNR / MCBNL series turning tools:

Model Type (R/L) Compatible Insert Shank(hxb) Shim Pin Clamp Screw Wrench
MCBNR/L 2525M12 CNMG 1204xx 25 x 25 MC1204 CTM617 HL1813 ML0625 L3.0
MCBNR/L 1616H12 / 2020K12 / 3232P12 16x16 / 20x20 / 32x32
MCBNR/L 2525M16 / 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

Machining Data Recommendations

Steel & Carbon 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

Metric vs. Imperial Shank Reference

Metric Model: MCBNL2525M12 (25mm) Imperial Equivalent: MCBNL 16-4D (1")
Metric Model: MCBNL2020K12 (20mm) Imperial Equivalent: MCBNL 12-4C (3/4")
Metric Model: MCBNL3232P12 (32mm) Imperial Equivalent: MCBNL 20-4E (1-1/4")

Global Verified Feedback

⭐⭐⭐⭐⭐ "The MCBNL2525M12 left-hand bar is incredibly stable. Perfect for heavy-duty CNC turning." - Markus, Germany

⭐⭐⭐⭐⭐ "Fast shipping to UK. The M-type clamping provides excellent rigidity during roughing." - Robert, UK

⭐⭐⭐⭐ "Good tool life and high precision shims. Fits my CNMG inserts perfectly." - Jason, Canada

⭐⭐⭐⭐⭐ "Much better than standard holders for interrupted cuts. Zero vibration." - Liam, Australia

⭐⭐⭐⭐⭐ "Solid construction. BEYOND tool holders are my first choice for heavy machining." - S. Watanabe, Japan

Frequently Asked Questions (FAQ)

Q: Is this holder suitable for internal boring?
A: No, this is an external turning tool holder. Please browse our boring bar section for internal work.

Q: What materials can I cut with this tool holder?
A: It is suitable for steel, stainless steel, and cast iron depending on the CNMG insert grade you choose.

Q: Does it come with the wrenches?
A: Yes, all BEYOND holders come fully equipped with the appropriate wrenches, shims, and screws.

Pro Tips: Clamping System Selection

M-TYPE: Multi-Lock. Maximum rigidity for roughing and heavy-duty turning.
W-TYPE: Lever Clamping. Fast indexing for general purpose machining.
P-TYPE: Hole Clamping. Best chip flow for high-speed finishing.
S-TYPE: Screw-Down. Lowest profile for small shanks and boring bars.

Long-tail Keywords: MCBNL2525M12, CNC Turning Bar, Left Hand Lathe Tool Holder, CNMG Indexable Bar, BEYOND Tools China, 25mm Industrial Shank.

© BEYOND CNC Tools - Industrial Precision Engineering Solutions.

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.