ZCC.CT KNUX160405L11 YBM251 Left-Hand Turning Inserts for Stainless Steel

$113.36 USD

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Description

ZCC.CT KNUX160405L11 YBM251 Turning Insert

Premium Left-Hand Solution for Stainless Steel Machining

Product Overview

"Which insert provides the highest stability and chip-breaking efficiency for left-hand profiling of 304 or 316 stainless steel in medium cutting conditions?"

The ZCC.CT KNUX160405L11 in YBM251 grade is a specialized 55° parallelogram turning insert designed for the ISO M20-M30 range. This Left-Hand (L) geometry is critical for specific tool holder orientations and profiling paths. Featuring a refined CVD coating, it combines a high-toughness substrate with superior wear resistance, specifically tackling the work-hardening and thermal challenges inherent in stainless steel machining. The L11 chipbreaker ensures smooth chip evacuation even at varying depths of cut.

Key Core Advantages

  • Advanced YBM251 Grade: A second-generation CVD coated carbide optimized for thermal stability in austenitic stainless steel.
  • Left-Hand (L) Geometry: Dedicated left-hand orientation for specialized profiling and sub-spindle operations.
  • Superior Chip Evacuation: The L11 groove prevents "bird-nesting," significantly reducing downtime on automated CNC lines.

Technical Specifications

ISO Nomenclature Breakdown

K
55° Shape
N
0° Relief
U
Tolerance
X
Special
16
16mm Edge
04
4.76mm T
L11
LH Chip
Feature Metric (ISO) Imperial (ANSI)
ISO Model KNUX160405L11 KNUX 431-L11
Inscribed Circle 9.525 mm 3/8 in
Nose Radius 0.5 mm 0.020 in

Recommended Cutting Data (M Group)

Application Speed (Vc) Feed (fn)
Stainless (Continuous) 150 - 260 m/min 0.12 - 0.35 mm/r
Stainless (Light Interruption) 120 - 200 m/min 0.15 - 0.30 mm/r

Compatible Left-Hand Holders:

CKJNL / CKUNL / CKDNL (ISO Standard)

View Matching Tool Holders →

Primary Applications

  • Medium profiling of Austenitic Stainless Steel (304, 316).
  • Duplex Stainless Steel machining (Light semi-finishing).
  • Chemical industry flanges and pump shafts.
  • Automotive valve production.

Machine Compatibility

  • All CNC Turning Centers with ISO-compliant turrets.
  • Best utilized with high-pressure coolant systems.
  • Optimized for Left-Hand tool post setups.

ZCC.CT Grade Choice (Stainless Steel)

Grade Range Characteristics
YBM251 M20-M30 Universal Grade / Versatile
YBM151 M10-M20 Finishing / High Speed

Machinist Reviews

★★★★★

"Hard to find quality left-hand inserts. These ZCC units are robust for 316L. No vibration."

— Mike T., USA 🇺🇸
★★★★★

"Sehr gute Standzeit bei Edelstahl. YBM251 ist mein Favorit für den Allround-Einsatz."

— Jürgen K., Germany 🇩🇪
★★★★★

"Perfetto per lavorazione acciai inossidabili. Truciolo sempre sotto controllo."

— Alessandro V., Italy 🇮🇹
★★★★☆

"Excellent finish on SS304. Delivered quickly to Tokyo."

— Tanaka H., Japan 🇯🇵

FAQ

Q: Can I use this Left-Hand insert in a Right-Hand holder?

A: No. Left-Hand (L) inserts must be paired with Left-Hand (L) holders to ensure the proper rake angle and chipbreaker orientation.

Q: What is the best coolant strategy for YBM251?

A: Use high-pressure, flood coolant focused directly on the cutting edge to prevent built-up edge (BUE) common in stainless steels.

Q: Is this insert suitable for roughing?

A: While it can handle light roughing, it is best suited for semi-finishing and profiling in the M20 range.

Material Tip: When machining austenitic stainless, maintain a constant feed rate. If the tool dwells, it will work-harden the material, leading to premature failure of the next insert edge.

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.